1 | |
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2 | /* |
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3 | * This file is part of libtrace |
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4 | * |
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5 | * Copyright (c) 2007,2008,2009,2010 The University of Waikato, Hamilton, |
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6 | * New Zealand. |
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7 | * |
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8 | * Author: Richard Sanger |
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9 | * |
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10 | * All rights reserved. |
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11 | * |
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12 | * This code has been developed by the University of Waikato WAND |
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13 | * research group. For further information please see http://www.wand.net.nz/ |
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14 | * |
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15 | * libtrace is free software; you can redistribute it and/or modify |
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16 | * it under the terms of the GNU General Public License as published by |
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17 | * the Free Software Foundation; either version 2 of the License, or |
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18 | * (at your option) any later version. |
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19 | * |
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20 | * libtrace is distributed in the hope that it will be useful, |
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21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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23 | * GNU General Public License for more details. |
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24 | * |
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25 | * You should have received a copy of the GNU General Public License |
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26 | * along with libtrace; if not, write to the Free Software |
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27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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28 | * |
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29 | * $Id: format_dpdk.c 1805 2013-03-08 02:01:35Z salcock $ |
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30 | * |
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31 | */ |
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32 | |
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33 | /* This format module deals with using the Intel Data Plane Development |
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34 | * Kit capture format. |
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35 | * |
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36 | * Intel Data Plane Development Kit is a LIVE capture format. |
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37 | * |
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38 | * This format also supports writing which will write packets out to the |
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39 | * network as a form of packet replay. This should not be confused with the |
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40 | * RT protocol which is intended to transfer captured packet records between |
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41 | * RT-speaking programs. |
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42 | */ |
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43 | |
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44 | #define _GNU_SOURCE |
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45 | |
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46 | #include "config.h" |
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47 | #include "libtrace.h" |
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48 | #include "libtrace_int.h" |
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49 | #include "format_helper.h" |
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50 | #include "libtrace_arphrd.h" |
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51 | #include "hash_toeplitz.h" |
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52 | |
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53 | #ifdef HAVE_INTTYPES_H |
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54 | # include <inttypes.h> |
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55 | #else |
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56 | # error "Can't find inttypes.h" |
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57 | #endif |
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58 | |
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59 | #include <stdlib.h> |
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60 | #include <assert.h> |
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61 | #include <unistd.h> |
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62 | #include <endian.h> |
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63 | #include <string.h> |
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64 | |
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65 | #if HAVE_LIBNUMA |
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66 | #include <numa.h> |
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67 | #endif |
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68 | |
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69 | /* We can deal with any minor differences by checking the RTE VERSION |
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70 | * Typically DPDK backports some fixes (typically for building against |
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71 | * newer kernels) to the older version of DPDK. |
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72 | * |
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73 | * These get released with the rX suffix. The following macros where added |
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74 | * in these new releases. |
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75 | * |
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76 | * Below this is a log of version that required changes to the libtrace |
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77 | * code (that we still attempt to support). |
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78 | * |
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79 | * DPDK v1.7.1 is recommended. |
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80 | * However 1.5 to 1.8 are likely supported. |
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81 | */ |
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82 | #include <rte_eal.h> |
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83 | #include <rte_version.h> |
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84 | #ifndef RTE_VERSION_NUM |
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85 | # define RTE_VERSION_NUM(a,b,c,d) ((a) << 24 | (b) << 16 | (c) << 8 | (d)) |
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86 | #endif |
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87 | #ifndef RTE_VER_PATCH_RELEASE |
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88 | # define RTE_VER_PATCH_RELEASE 0 |
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89 | #endif |
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90 | #ifndef RTE_VERSION |
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91 | # define RTE_VERSION RTE_VERSION_NUM(RTE_VER_MAJOR,RTE_VER_MINOR, \ |
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92 | RTE_VER_PATCH_LEVEL, RTE_VER_PATCH_RELEASE) |
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93 | #endif |
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94 | |
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95 | /* 1.6.0r2 : |
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96 | * rte_eal_pci_set_blacklist() is removed |
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97 | * device_list is renamed to pci_device_list |
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98 | * In the 1.7.0 release rte_eal_pci_probe is called by rte_eal_init |
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99 | * as such we do apply the whitelist before rte_eal_init. |
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100 | * This also works correctly with DPDK 1.6.0r2. |
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101 | * |
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102 | * Replaced by: |
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103 | * rte_devargs (we can simply whitelist) |
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104 | */ |
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105 | #if RTE_VERSION <= RTE_VERSION_NUM(1, 6, 0, 1) |
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106 | # define DPDK_USE_BLACKLIST 1 |
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107 | #else |
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108 | # define DPDK_USE_BLACKLIST 0 |
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109 | #endif |
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110 | |
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111 | /* |
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112 | * 1.7.0 : |
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113 | * rte_pmd_init_all is removed |
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114 | * |
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115 | * Replaced by: |
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116 | * Nothing, no longer needed |
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117 | */ |
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118 | #if RTE_VERSION < RTE_VERSION_NUM(1, 7, 0, 0) |
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119 | # define DPDK_USE_PMD_INIT 1 |
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120 | #else |
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121 | # define DPDK_USE_PMD_INIT 0 |
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122 | #endif |
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123 | |
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124 | /* 1.7.0-rc3 : |
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125 | * |
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126 | * Since 1.7.0-rc3 rte_eal_pci_probe is called as part of rte_eal_init. |
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127 | * Somewhere between 1.7 and 1.8 calling it twice broke so we should not call |
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128 | * it twice. |
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129 | */ |
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130 | #if RTE_VERSION < RTE_VERSION_NUM(1, 7, 0, 3) |
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131 | # define DPDK_USE_PCI_PROBE 1 |
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132 | #else |
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133 | # define DPDK_USE_PCI_PROBE 0 |
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134 | #endif |
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135 | |
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136 | /* 1.8.0-rc1 : |
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137 | * LOG LEVEL is a command line option which overrides what |
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138 | * we previously set it to. |
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139 | */ |
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140 | #if RTE_VERSION >= RTE_VERSION_NUM(1, 8, 0, 1) |
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141 | # define DPDK_USE_LOG_LEVEL 1 |
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142 | #else |
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143 | # define DPDK_USE_LOG_LEVEL 0 |
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144 | #endif |
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145 | |
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146 | #include <rte_per_lcore.h> |
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147 | #include <rte_debug.h> |
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148 | #include <rte_errno.h> |
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149 | #include <rte_common.h> |
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150 | #include <rte_log.h> |
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151 | #include <rte_memcpy.h> |
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152 | #include <rte_prefetch.h> |
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153 | #include <rte_branch_prediction.h> |
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154 | #include <rte_pci.h> |
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155 | #include <rte_ether.h> |
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156 | #include <rte_ethdev.h> |
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157 | #include <rte_ring.h> |
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158 | #include <rte_mempool.h> |
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159 | #include <rte_mbuf.h> |
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160 | #include <rte_launch.h> |
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161 | #include <rte_lcore.h> |
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162 | #include <rte_per_lcore.h> |
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163 | #include <rte_cycles.h> |
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164 | #include <pthread.h> |
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165 | |
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166 | /* The default size of memory buffers to use - This is the max size of standard |
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167 | * ethernet packet less the size of the MAC CHECKSUM */ |
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168 | #define RX_MBUF_SIZE 1514 |
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169 | |
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170 | /* The minimum number of memory buffers per queue tx or rx. Search for |
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171 | * _MIN_RING_DESC in DPDK. The largest minimum is 64 for 10GBit cards. |
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172 | */ |
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173 | #define MIN_NB_BUF 64 |
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174 | |
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175 | /* Number of receive memory buffers to use |
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176 | * By default this is limited by driver to 4k and must be a multiple of 128. |
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177 | * A modification can be made to the driver to remove this limit. |
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178 | * This can be increased in the driver and here. |
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179 | * Should be at least MIN_NB_BUF. |
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180 | */ |
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181 | #define NB_RX_MBUF 4096 |
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182 | |
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183 | /* Number of send memory buffers to use. |
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184 | * Same limits apply as those to NB_TX_MBUF. |
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185 | */ |
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186 | #define NB_TX_MBUF 1024 |
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187 | |
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188 | /* The size of the PCI blacklist needs to be big enough to contain |
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189 | * every PCI device address (listed by lspci every bus:device.function tuple). |
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190 | */ |
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191 | #define BLACK_LIST_SIZE 50 |
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192 | |
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193 | /* The maximum number of characters the mempool name can be */ |
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194 | #define MEMPOOL_NAME_LEN 20 |
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195 | |
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196 | /* For single threaded libtrace we read packets as a batch/burst |
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197 | * this is the maximum size of said burst */ |
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198 | #define BURST_SIZE 50 |
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199 | |
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200 | #define MBUF(x) ((struct rte_mbuf *) x) |
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201 | /* Get the original placement of the packet data */ |
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202 | #define MBUF_PKTDATA(x) ((char *) x + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM) |
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203 | #define FORMAT(x) ((struct dpdk_format_data_t*)(x->format_data)) |
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204 | #define PERPKT_FORMAT(x) ((struct dpdk_per_lcore_t*)(x->format_data)) |
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205 | |
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206 | #define FORMAT_DATA_HEAD(x) FORMAT(x)->per_stream->head |
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207 | #define FORMAT_DATA_FIRST(x) ((dpdk_per_stream_t *)FORMAT_DATA_HEAD(x)->data) |
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208 | |
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209 | #define TV_TO_NS(tv) ((uint64_t) tv.tv_sec*1000000000ull + \ |
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210 | (uint64_t) tv.tv_usec*1000ull) |
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211 | #define TS_TO_NS(ts) ((uint64_t) ts.tv_sec*1000000000ull + \ |
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212 | (uint64_t) ts.tv_nsec) |
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213 | |
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214 | #if RTE_PKTMBUF_HEADROOM != 128 |
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215 | #warning "RTE_PKT_MBUF_HEADROOM is not set to the default value of 128 - " \ |
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216 | "any libtrace instance processing these packet must be have the" \ |
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217 | "same RTE_PKTMBUF_HEADROOM set" |
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218 | #endif |
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219 | |
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220 | /* ~~~~~~~~~~~~~~~~~~~~~~ Advance settings ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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221 | * THESE MAY REQUIRE MODIFICATIONS TO INTEL DPDK |
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222 | * |
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223 | * Make sure you understand what these are doing before enabling them. |
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224 | * They might make traces incompatable with other builds etc. |
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225 | * |
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226 | * These are also included to show how to do somethings which aren't |
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227 | * obvious in the DPDK documentation. |
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228 | */ |
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229 | |
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230 | /* Print verbose messages to stderr */ |
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231 | #define DEBUG 0 |
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232 | |
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233 | /* Use clock_gettime() for nanosecond resolution rather than gettimeofday() |
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234 | * only turn on if you know clock_gettime is a vsyscall on your system |
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235 | * overwise could be a large overhead. Again gettimeofday() should be |
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236 | * vsyscall also if it's not you should seriously consider updating your |
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237 | * kernel. |
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238 | */ |
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239 | #ifdef HAVE_CLOCK_GETTIME |
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240 | /* You can turn this on (set to 1) to prefer clock_gettime */ |
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241 | #define USE_CLOCK_GETTIME 1 |
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242 | #else |
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243 | /* DON'T CHANGE THIS !!! */ |
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244 | #define USE_CLOCK_GETTIME 0 |
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245 | #endif |
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246 | |
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247 | /* This is fairly safe to turn on - currently there appears to be a 'bug' |
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248 | * in DPDK that will remove the checksum by making the packet appear 4bytes |
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249 | * smaller than what it really is. Most formats don't include the checksum |
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250 | * hence writing out a port such as int: ring: and dpdk: assumes there |
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251 | * is no checksum and will attempt to write the checksum as part of the |
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252 | * packet |
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253 | */ |
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254 | #define GET_MAC_CRC_CHECKSUM 0 |
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255 | |
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256 | /* This requires a modification of the pmd drivers (inside Intel DPDK) |
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257 | * TODO this requires updating (packet sizes are wrong TS most likely also) |
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258 | */ |
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259 | #define HAS_HW_TIMESTAMPS_82580 0 |
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260 | |
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261 | #if HAS_HW_TIMESTAMPS_82580 |
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262 | # define TS_NBITS_82580 40 |
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263 | /* The maximum on the +ve or -ve side that we can be, make it half way */ |
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264 | # define MAXSKEW_82580 ((uint64_t) (.5 * (double)(1ull<<TS_NBITS_82580))) |
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265 | #define WITHIN_VARIANCE(v1,v2,var) (((v1) - (var) < (v2)) && ((v1) + (var) > (v2))) |
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266 | #endif |
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267 | |
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268 | static pthread_mutex_t dpdk_lock = PTHREAD_MUTEX_INITIALIZER; |
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269 | /* Memory pools Per NUMA node */ |
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270 | static struct rte_mempool * mem_pools[4][RTE_MAX_LCORE] = {{0}}; |
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271 | |
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272 | /* As per Intel 82580 specification - mismatch in 82580 datasheet |
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273 | * it states ts is stored in Big Endian, however its actually Little */ |
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274 | struct hw_timestamp_82580 { |
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275 | uint64_t reserved; |
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276 | uint64_t timestamp; /* Little Endian only lower 40 bits are valid */ |
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277 | }; |
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278 | |
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279 | enum paused_state { |
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280 | DPDK_NEVER_STARTED, |
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281 | DPDK_RUNNING, |
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282 | DPDK_PAUSED, |
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283 | }; |
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284 | |
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285 | struct dpdk_per_stream_t |
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286 | { |
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287 | uint16_t queue_id; |
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288 | uint64_t ts_last_sys; /* System timestamp of our most recent packet in nanoseconds */ |
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289 | struct rte_mempool *mempool; |
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290 | int lcore; |
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291 | #if HAS_HW_TIMESTAMPS_82580 |
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292 | /* Timestamping only relevent to RX */ |
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293 | uint64_t ts_first_sys; /* Sytem timestamp of the first packet in nanoseconds */ |
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294 | uint32_t wrap_count; /* Number of times the NIC clock has wrapped around completely */ |
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295 | #endif |
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296 | } ALIGN_STRUCT(CACHE_LINE_SIZE); |
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297 | |
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298 | #if HAS_HW_TIMESTAMPS_82580 |
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299 | #define DPDK_EMPTY_STREAM {-1, 0, NULL, -1, 0, 0} |
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300 | #else |
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301 | #define DPDK_EMPTY_STREAM {-1, 0, NULL, -1} |
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302 | #endif |
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303 | |
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304 | typedef struct dpdk_per_stream_t dpdk_per_stream_t; |
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305 | |
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306 | /* Used by both input and output however some fields are not used |
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307 | * for output */ |
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308 | struct dpdk_format_data_t { |
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309 | int8_t promisc; /* promiscuous mode - RX only */ |
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310 | uint8_t port; /* Always 0 we only whitelist a single port - Shared TX & RX */ |
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311 | uint8_t nb_ports; /* Total number of usable ports on system should be 1 */ |
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312 | uint8_t paused; /* See paused_state */ |
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313 | uint16_t link_speed; /* Link speed 10,100,1000,10000 etc. */ |
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314 | int snaplen; /* The snap length for the capture - RX only */ |
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315 | /* We always have to setup both rx and tx queues even if we don't want them */ |
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316 | int nb_rx_buf; /* The number of packet buffers in the rx ring */ |
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317 | int nb_tx_buf; /* The number of packet buffers in the tx ring */ |
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318 | int nic_numa_node; /* The NUMA node that the NIC is attached to */ |
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319 | struct rte_mempool * pktmbuf_pool; /* Our packet memory pool */ |
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320 | #if DPDK_USE_BLACKLIST |
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321 | struct rte_pci_addr blacklist[BLACK_LIST_SIZE]; /* Holds our device blacklist */ |
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322 | unsigned int nb_blacklist; /* Number of blacklist items in are valid */ |
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323 | #endif |
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324 | char mempool_name[MEMPOOL_NAME_LEN]; /* The name of the mempool that we are using */ |
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325 | uint8_t rss_key[40]; // This is the RSS KEY |
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326 | /* To improve single-threaded performance we always batch reading |
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327 | * packets, in a burst, otherwise the parallel library does this for us */ |
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328 | struct rte_mbuf* burst_pkts[BURST_SIZE]; |
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329 | int burst_size; /* The total number read in the burst */ |
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330 | int burst_offset; /* The offset we are into the burst */ |
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331 | |
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332 | /* Our parallel streams */ |
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333 | libtrace_list_t *per_stream; |
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334 | }; |
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335 | |
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336 | enum dpdk_addt_hdr_flags { |
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337 | INCLUDES_CHECKSUM = 0x1, |
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338 | INCLUDES_HW_TIMESTAMP = 0x2, /* Used with 82580 driver */ |
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339 | }; |
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340 | |
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341 | /** |
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342 | * A structure placed in front of the packet where we can store |
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343 | * additional information about the given packet. |
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344 | * +--------------------------+ |
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345 | * | rte_mbuf (pkt) | sizeof(rte_mbuf) |
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346 | * +--------------------------+ |
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347 | * | dpdk_addt_hdr | sizeof(dpdk_addt_hdr) |
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348 | * +--------------------------+ |
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349 | * | padding | RTE_PKTMBUF_HEADROOM-sizeof(dpdk_addt_hdr) |
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350 | * +--------------------------+ |
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351 | * * hw_timestamp_82580 * 16 bytes Optional |
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352 | * +--------------------------+ |
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353 | * | Packet data | Variable Size |
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354 | * | | |
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355 | */ |
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356 | struct dpdk_addt_hdr { |
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357 | uint64_t timestamp; |
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358 | uint8_t flags; |
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359 | uint8_t direction; |
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360 | uint8_t reserved1; |
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361 | uint8_t reserved2; |
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362 | uint32_t cap_len; /* The size to say the capture is */ |
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363 | }; |
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364 | |
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365 | /** |
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366 | * We want to blacklist all devices except those on the whitelist |
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367 | * (I say list, but yes it is only the one). |
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368 | * |
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369 | * The default behaviour of rte_pci_probe() will map every possible device |
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370 | * to its DPDK driver. The DPDK driver will take the ethernet device |
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371 | * out of the kernel (i.e. no longer /dev/ethx) and cannot be used. |
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372 | * |
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373 | * So blacklist all devices except the one that we wish to use so that |
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374 | * the others can still be used as standard ethernet ports. |
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375 | * |
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376 | * @return 0 if successful, otherwise -1 on error. |
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377 | */ |
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378 | #if DPDK_USE_BLACKLIST |
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379 | static int blacklist_devices(struct dpdk_format_data_t *format_data, struct rte_pci_addr *whitelist) |
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380 | { |
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381 | struct rte_pci_device *dev = NULL; |
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382 | format_data->nb_blacklist = 0; |
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383 | |
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384 | memset(format_data->blacklist, 0, sizeof (format_data->blacklist)); |
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385 | |
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386 | TAILQ_FOREACH(dev, &device_list, next) { |
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387 | if (whitelist != NULL && whitelist->domain == dev->addr.domain |
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388 | && whitelist->bus == dev->addr.bus |
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389 | && whitelist->devid == dev->addr.devid |
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390 | && whitelist->function == dev->addr.function) |
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391 | continue; |
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392 | if (format_data->nb_blacklist >= sizeof (format_data->blacklist) |
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393 | / sizeof (format_data->blacklist[0])) { |
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394 | fprintf(stderr, "Warning: too many devices to blacklist consider" |
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395 | " increasing BLACK_LIST_SIZE"); |
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396 | break; |
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397 | } |
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398 | format_data->blacklist[format_data->nb_blacklist] = dev->addr; |
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399 | ++format_data->nb_blacklist; |
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400 | } |
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401 | |
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402 | rte_eal_pci_set_blacklist(format_data->blacklist, format_data->nb_blacklist); |
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403 | return 0; |
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404 | } |
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405 | #else /* DPDK_USE_BLACKLIST */ |
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406 | #include <rte_devargs.h> |
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407 | static int whitelist_device(struct dpdk_format_data_t *format_data UNUSED, struct rte_pci_addr *whitelist) |
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408 | { |
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409 | char pci_str[20] = {0}; |
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410 | snprintf(pci_str, sizeof(pci_str), PCI_PRI_FMT, |
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411 | whitelist->domain, |
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412 | whitelist->bus, |
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413 | whitelist->devid, |
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414 | whitelist->function); |
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415 | if (rte_eal_devargs_add(RTE_DEVTYPE_WHITELISTED_PCI, pci_str) < 0) { |
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416 | return -1; |
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417 | } |
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418 | return 0; |
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419 | } |
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420 | #endif |
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421 | |
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422 | /** |
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423 | * Parse the URI format as a pci address |
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424 | * Fills in addr, note core is optional and is unchanged if |
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425 | * a value for it is not provided. |
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426 | * |
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427 | * i.e. ./libtrace dpdk:0:1:0.0 -> 0:1:0.0 |
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428 | * or ./libtrace dpdk:0:1:0.1-2 -> 0:1:0.1 (Using CPU core #2) |
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429 | */ |
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430 | static int parse_pciaddr(char * str, struct rte_pci_addr * addr, long * core) { |
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431 | int matches; |
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432 | assert(str); |
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433 | matches = sscanf(str, "%4"SCNx16":%2"SCNx8":%2"SCNx8".%2"SCNx8"-%ld", |
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434 | &addr->domain, &addr->bus, &addr->devid, |
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435 | &addr->function, core); |
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436 | if (matches >= 4) { |
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437 | return 0; |
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438 | } else { |
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439 | return -1; |
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440 | } |
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441 | } |
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442 | |
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443 | /** |
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444 | * Convert a pci address to the numa node it is |
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445 | * connected to. |
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446 | * |
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447 | * This checks /sys/bus/pci/devices/XXXX:XX:XX.X/numa_node |
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448 | * so we can call it before DPDK |
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449 | * |
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450 | * @return -1 if unknown otherwise a number 0 or higher of the numa node |
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451 | */ |
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452 | static int pci_to_numa(struct rte_pci_addr * dev_addr) { |
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453 | char path[50] = {0}; |
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454 | FILE *file; |
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455 | |
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456 | /* Read from the system */ |
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457 | snprintf(path, sizeof(path), "/sys/bus/pci/devices/"PCI_PRI_FMT"/numa_node", |
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458 | dev_addr->domain, |
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459 | dev_addr->bus, |
---|
460 | dev_addr->devid, |
---|
461 | dev_addr->function); |
---|
462 | |
---|
463 | if((file = fopen(path, "r")) != NULL) { |
---|
464 | int numa_node = -1; |
---|
465 | fscanf(file, "%d", &numa_node); |
---|
466 | fclose(file); |
---|
467 | return numa_node; |
---|
468 | } |
---|
469 | return -1; |
---|
470 | } |
---|
471 | |
---|
472 | #if DEBUG |
---|
473 | /* For debugging */ |
---|
474 | static inline void dump_configuration() |
---|
475 | { |
---|
476 | struct rte_config * global_config; |
---|
477 | long nb_cpu = sysconf(_SC_NPROCESSORS_ONLN); |
---|
478 | |
---|
479 | if (nb_cpu <= 0) { |
---|
480 | perror("sysconf(_SC_NPROCESSORS_ONLN) failed." |
---|
481 | " Falling back to the first core."); |
---|
482 | nb_cpu = 1; /* fallback to just 1 core */ |
---|
483 | } |
---|
484 | if (nb_cpu > RTE_MAX_LCORE) |
---|
485 | nb_cpu = RTE_MAX_LCORE; |
---|
486 | |
---|
487 | global_config = rte_eal_get_configuration(); |
---|
488 | |
---|
489 | if (global_config != NULL) { |
---|
490 | int i; |
---|
491 | fprintf(stderr, "Intel DPDK setup\n" |
---|
492 | "---Version : %s\n" |
---|
493 | "---Master LCore : %"PRIu32"\n" |
---|
494 | "---LCore Count : %"PRIu32"\n", |
---|
495 | rte_version(), |
---|
496 | global_config->master_lcore, global_config->lcore_count); |
---|
497 | |
---|
498 | for (i = 0 ; i < nb_cpu; i++) { |
---|
499 | fprintf(stderr, " ---Core %d : %s\n", i, |
---|
500 | global_config->lcore_role[i] == ROLE_RTE ? "on" : "off"); |
---|
501 | } |
---|
502 | |
---|
503 | const char * proc_type; |
---|
504 | switch (global_config->process_type) { |
---|
505 | case RTE_PROC_AUTO: |
---|
506 | proc_type = "auto"; |
---|
507 | break; |
---|
508 | case RTE_PROC_PRIMARY: |
---|
509 | proc_type = "primary"; |
---|
510 | break; |
---|
511 | case RTE_PROC_SECONDARY: |
---|
512 | proc_type = "secondary"; |
---|
513 | break; |
---|
514 | case RTE_PROC_INVALID: |
---|
515 | proc_type = "invalid"; |
---|
516 | break; |
---|
517 | default: |
---|
518 | proc_type = "something worse than invalid!!"; |
---|
519 | } |
---|
520 | fprintf(stderr, "---Process Type : %s\n", proc_type); |
---|
521 | } |
---|
522 | |
---|
523 | } |
---|
524 | #endif |
---|
525 | |
---|
526 | /** |
---|
527 | * Expects to be called from the master lcore and moves it to the given dpdk id |
---|
528 | * @param core (zero indexed) If core is on the physical system affinity is bound otherwise |
---|
529 | * affinity is set to all cores. Must be less than RTE_MAX_LCORE |
---|
530 | * and not already in use. |
---|
531 | * @return 0 is successful otherwise -1 on error. |
---|
532 | */ |
---|
533 | static inline int dpdk_move_master_lcore(libtrace_t *libtrace, size_t core) { |
---|
534 | struct rte_config *cfg = rte_eal_get_configuration(); |
---|
535 | cpu_set_t cpuset; |
---|
536 | int i; |
---|
537 | |
---|
538 | assert (core < RTE_MAX_LCORE); |
---|
539 | assert (rte_get_master_lcore() == rte_lcore_id()); |
---|
540 | |
---|
541 | if (core == rte_lcore_id()) |
---|
542 | return 0; |
---|
543 | |
---|
544 | /* Make sure we are not overwriting someone else */ |
---|
545 | assert(!rte_lcore_is_enabled(core)); |
---|
546 | |
---|
547 | /* Move the core */ |
---|
548 | cfg->lcore_role[rte_lcore_id()] = ROLE_OFF; |
---|
549 | cfg->lcore_role[core] = ROLE_RTE; |
---|
550 | lcore_config[core].thread_id = lcore_config[rte_lcore_id()].thread_id; |
---|
551 | rte_eal_get_configuration()->master_lcore = core; |
---|
552 | RTE_PER_LCORE(_lcore_id) = core; |
---|
553 | |
---|
554 | /* Now change the affinity, either mapped to a single core or all accepted */ |
---|
555 | CPU_ZERO(&cpuset); |
---|
556 | |
---|
557 | if (lcore_config[core].detected) { |
---|
558 | CPU_SET(core, &cpuset); |
---|
559 | } else { |
---|
560 | for (i = 0; i < RTE_MAX_LCORE; ++i) { |
---|
561 | if (lcore_config[i].detected) |
---|
562 | CPU_SET(i, &cpuset); |
---|
563 | } |
---|
564 | } |
---|
565 | |
---|
566 | i = pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset); |
---|
567 | if (i != 0) { |
---|
568 | trace_set_err(libtrace, errno, "pthread_setaffinity_np failed\n"); |
---|
569 | return -1; |
---|
570 | } |
---|
571 | return 0; |
---|
572 | } |
---|
573 | |
---|
574 | /** |
---|
575 | * XXX This is very bad XXX |
---|
576 | * But we have to do something to allow getopts nesting |
---|
577 | * Luckly normally the format is last so it doesn't matter |
---|
578 | * DPDK only supports modern systems so hopefully this |
---|
579 | * will continue to work |
---|
580 | */ |
---|
581 | struct saved_getopts { |
---|
582 | char *optarg; |
---|
583 | int optind; |
---|
584 | int opterr; |
---|
585 | int optopt; |
---|
586 | }; |
---|
587 | |
---|
588 | static void save_getopts(struct saved_getopts *opts) { |
---|
589 | opts->optarg = optarg; |
---|
590 | opts->optind = optind; |
---|
591 | opts->opterr = opterr; |
---|
592 | opts->optopt = optopt; |
---|
593 | } |
---|
594 | |
---|
595 | static void restore_getopts(struct saved_getopts *opts) { |
---|
596 | optarg = opts->optarg; |
---|
597 | optind = opts->optind; |
---|
598 | opterr = opts->opterr; |
---|
599 | optopt = opts->optopt; |
---|
600 | } |
---|
601 | |
---|
602 | static inline int dpdk_init_environment(char * uridata, struct dpdk_format_data_t * format_data, |
---|
603 | char * err, int errlen) { |
---|
604 | int ret; /* Returned error codes */ |
---|
605 | struct rte_pci_addr use_addr; /* The only address that we don't blacklist */ |
---|
606 | char cpu_number[10] = {0}; /* The CPU mask we want to bind to */ |
---|
607 | char mem_map[20] = {0}; /* The memory name */ |
---|
608 | long nb_cpu; /* The number of CPUs in the system */ |
---|
609 | long my_cpu; /* The CPU number we want to bind to */ |
---|
610 | int i; |
---|
611 | struct rte_config *cfg = rte_eal_get_configuration(); |
---|
612 | struct saved_getopts save_opts; |
---|
613 | |
---|
614 | /* This initialises the Environment Abstraction Layer (EAL) |
---|
615 | * If we had slave workers these are put into WAITING state |
---|
616 | * |
---|
617 | * Basically binds this thread to a fixed core, which we choose as |
---|
618 | * the last core on the machine (assuming fewer interrupts mapped here). |
---|
619 | * "-c" controls the cpu mask 0x1=1st core 0x2=2nd 0x4=3rd and so on |
---|
620 | * "-n" the number of memory channels into the CPU (hardware specific) |
---|
621 | * - Most likely to be half the number of ram slots in your machine. |
---|
622 | * We could count ram slots by "dmidecode -t 17 | grep -c 'Size:'" |
---|
623 | * Controls where in memory packets are stored such that they are spread |
---|
624 | * across the channels. We just use 1 to be safe. |
---|
625 | * |
---|
626 | * Using unique file prefixes mean separate memory is used, unlinking |
---|
627 | * the two processes. However be careful we still cannot access a |
---|
628 | * port that already in use. |
---|
629 | */ |
---|
630 | char* argv[] = {"libtrace", |
---|
631 | "-c", cpu_number, |
---|
632 | "-n", "1", |
---|
633 | "--proc-type", "auto", |
---|
634 | "--file-prefix", mem_map, |
---|
635 | "-m", "512", |
---|
636 | #if DPDK_USE_LOG_LEVEL |
---|
637 | # if DEBUG |
---|
638 | "--log-level", "8", /* RTE_LOG_DEBUG */ |
---|
639 | # else |
---|
640 | "--log-level", "5", /* RTE_LOG_WARNING */ |
---|
641 | # endif |
---|
642 | #endif |
---|
643 | NULL}; |
---|
644 | int argc = sizeof(argv) / sizeof(argv[0]) - 1; |
---|
645 | |
---|
646 | #if DEBUG |
---|
647 | rte_set_log_level(RTE_LOG_DEBUG); |
---|
648 | #else |
---|
649 | rte_set_log_level(RTE_LOG_WARNING); |
---|
650 | #endif |
---|
651 | |
---|
652 | /* Get the number of cpu cores in the system and use the last core |
---|
653 | * on the correct numa node */ |
---|
654 | nb_cpu = sysconf(_SC_NPROCESSORS_ONLN); |
---|
655 | if (nb_cpu <= 0) { |
---|
656 | perror("sysconf(_SC_NPROCESSORS_ONLN) failed." |
---|
657 | " Falling back to the first core."); |
---|
658 | nb_cpu = 1; /* fallback to the first core */ |
---|
659 | } |
---|
660 | if (nb_cpu > RTE_MAX_LCORE) |
---|
661 | nb_cpu = RTE_MAX_LCORE; |
---|
662 | |
---|
663 | my_cpu = -1; |
---|
664 | /* This allows the user to specify the core - we would try to do this |
---|
665 | * automatically but it's hard to tell that this is secondary |
---|
666 | * before running rte_eal_init(...). Currently we are limited to 1 |
---|
667 | * instance per core due to the way memory is allocated. */ |
---|
668 | if (parse_pciaddr(uridata, &use_addr, &my_cpu) != 0) { |
---|
669 | snprintf(err, errlen, "Failed to parse URI"); |
---|
670 | return -1; |
---|
671 | } |
---|
672 | |
---|
673 | #if HAVE_LIBNUMA |
---|
674 | format_data->nic_numa_node = pci_to_numa(&use_addr); |
---|
675 | if (my_cpu < 0) { |
---|
676 | /* If we can assign to a core on the same numa node */ |
---|
677 | fprintf(stderr, "Using pci card on numa_node%d\n", format_data->nic_numa_node); |
---|
678 | if(format_data->nic_numa_node >= 0) { |
---|
679 | int max_node_cpu = -1; |
---|
680 | struct bitmask *mask = numa_allocate_cpumask(); |
---|
681 | assert(mask); |
---|
682 | numa_node_to_cpus(format_data->nic_numa_node, mask); |
---|
683 | for (i = 0 ; i < nb_cpu; ++i) { |
---|
684 | if (numa_bitmask_isbitset(mask,i)) |
---|
685 | max_node_cpu = i+1; |
---|
686 | } |
---|
687 | my_cpu = max_node_cpu; |
---|
688 | } |
---|
689 | } |
---|
690 | #endif |
---|
691 | if (my_cpu < 0) { |
---|
692 | my_cpu = nb_cpu; |
---|
693 | } |
---|
694 | |
---|
695 | |
---|
696 | snprintf(format_data->mempool_name, MEMPOOL_NAME_LEN, |
---|
697 | "libtrace_pool_%"PRIu32, (uint32_t) nb_cpu); |
---|
698 | |
---|
699 | if (!(my_cpu > 0 && my_cpu <= nb_cpu)) { |
---|
700 | snprintf(err, errlen, |
---|
701 | "Intel DPDK - User defined a bad CPU number %"PRIu32" must be" |
---|
702 | " between 1 and %"PRIu32, (uint32_t) my_cpu, (uint32_t) nb_cpu); |
---|
703 | return -1; |
---|
704 | } |
---|
705 | |
---|
706 | /* Make our mask with all cores turned on this is so that DPDK to |
---|
707 | * gets CPU info older versions */ |
---|
708 | snprintf(cpu_number, sizeof(cpu_number), "%x", ~(UINT32_MAX<<MIN(31, nb_cpu))); |
---|
709 | //snprintf(cpu_number, sizeof(cpu_number), "%x", 0x1 << (my_cpu - 1)); |
---|
710 | |
---|
711 | #if !DPDK_USE_BLACKLIST |
---|
712 | /* Black list all ports besides the one that we want to use */ |
---|
713 | if ((ret = whitelist_device(format_data, &use_addr)) < 0) { |
---|
714 | snprintf(err, errlen, "Intel DPDK - Whitelisting PCI device failed," |
---|
715 | " are you sure the address is correct?: %s", strerror(-ret)); |
---|
716 | return -1; |
---|
717 | } |
---|
718 | #endif |
---|
719 | |
---|
720 | /* Give the memory map a unique name */ |
---|
721 | snprintf(mem_map, sizeof(mem_map), "libtrace-%d", (int) getpid()); |
---|
722 | /* rte_eal_init it makes a call to getopt so we need to reset the |
---|
723 | * global optind variable of getopt otherwise this fails */ |
---|
724 | save_getopts(&save_opts); |
---|
725 | optind = 1; |
---|
726 | if ((ret = rte_eal_init(argc, argv)) < 0) { |
---|
727 | snprintf(err, errlen, |
---|
728 | "Intel DPDK - Initialisation of EAL failed: %s", strerror(-ret)); |
---|
729 | return -1; |
---|
730 | } |
---|
731 | restore_getopts(&save_opts); |
---|
732 | // These are still running but will never do anything with DPDK v1.7 we |
---|
733 | // should remove this XXX in the future |
---|
734 | for(i = 0; i < RTE_MAX_LCORE; ++i) { |
---|
735 | if (rte_lcore_is_enabled(i) && i != (int) rte_get_master_lcore()) { |
---|
736 | cfg->lcore_role[i] = ROLE_OFF; |
---|
737 | cfg->lcore_count--; |
---|
738 | } |
---|
739 | } |
---|
740 | // Only the master should be running |
---|
741 | assert(cfg->lcore_count == 1); |
---|
742 | |
---|
743 | // TODO XXX TODO |
---|
744 | dpdk_move_master_lcore(NULL, my_cpu-1); |
---|
745 | |
---|
746 | #if DEBUG |
---|
747 | dump_configuration(); |
---|
748 | #endif |
---|
749 | |
---|
750 | #if DPDK_USE_PMD_INIT |
---|
751 | /* This registers all available NICs with Intel DPDK |
---|
752 | * These are not loaded until rte_eal_pci_probe() is called. |
---|
753 | */ |
---|
754 | if ((ret = rte_pmd_init_all()) < 0) { |
---|
755 | snprintf(err, errlen, |
---|
756 | "Intel DPDK - rte_pmd_init_all failed: %s", strerror(-ret)); |
---|
757 | return -1; |
---|
758 | } |
---|
759 | #endif |
---|
760 | |
---|
761 | #if DPDK_USE_BLACKLIST |
---|
762 | /* Blacklist all ports besides the one that we want to use */ |
---|
763 | if ((ret = blacklist_devices(format_data, &use_addr)) < 0) { |
---|
764 | snprintf(err, errlen, "Intel DPDK - Whitelisting PCI device failed," |
---|
765 | " are you sure the address is correct?: %s", strerror(-ret)); |
---|
766 | return -1; |
---|
767 | } |
---|
768 | #endif |
---|
769 | |
---|
770 | #if DPDK_USE_PCI_PROBE |
---|
771 | /* This loads DPDK drivers against all ports that are not blacklisted */ |
---|
772 | if ((ret = rte_eal_pci_probe()) < 0) { |
---|
773 | snprintf(err, errlen, |
---|
774 | "Intel DPDK - rte_eal_pci_probe failed: %s", strerror(-ret)); |
---|
775 | return -1; |
---|
776 | } |
---|
777 | #endif |
---|
778 | |
---|
779 | format_data->nb_ports = rte_eth_dev_count(); |
---|
780 | |
---|
781 | if (format_data->nb_ports != 1) { |
---|
782 | snprintf(err, errlen, |
---|
783 | "Intel DPDK - rte_eth_dev_count returned %d but it should be 1", |
---|
784 | format_data->nb_ports); |
---|
785 | return -1; |
---|
786 | } |
---|
787 | |
---|
788 | struct rte_eth_dev_info dev_info; |
---|
789 | rte_eth_dev_info_get(0, &dev_info); |
---|
790 | fprintf(stderr, "Device port=0\n\tmin_rx_bufsize=%d\n\tmax_rx_pktlen=%d\n\tmax rx queues=%d\n\tmax tx queues=%d", |
---|
791 | (int) dev_info.min_rx_bufsize, (int) dev_info.max_rx_pktlen, (int) dev_info.max_rx_queues, (int) dev_info.max_tx_queues); |
---|
792 | |
---|
793 | return 0; |
---|
794 | } |
---|
795 | |
---|
796 | static int dpdk_init_input (libtrace_t *libtrace) { |
---|
797 | dpdk_per_stream_t stream = DPDK_EMPTY_STREAM; |
---|
798 | char err[500]; |
---|
799 | err[0] = 0; |
---|
800 | |
---|
801 | libtrace->format_data = (struct dpdk_format_data_t *) |
---|
802 | malloc(sizeof(struct dpdk_format_data_t)); |
---|
803 | FORMAT(libtrace)->port = 0; /* Always assume 1 port loaded */ |
---|
804 | FORMAT(libtrace)->nb_ports = 0; |
---|
805 | FORMAT(libtrace)->snaplen = 0; /* Use default */ |
---|
806 | FORMAT(libtrace)->nb_rx_buf = NB_RX_MBUF; |
---|
807 | FORMAT(libtrace)->nb_tx_buf = MIN_NB_BUF; |
---|
808 | FORMAT(libtrace)->nic_numa_node = -1; |
---|
809 | FORMAT(libtrace)->promisc = -1; |
---|
810 | FORMAT(libtrace)->pktmbuf_pool = NULL; |
---|
811 | #if DPDK_USE_BLACKLIST |
---|
812 | FORMAT(libtrace)->nb_blacklist = 0; |
---|
813 | #endif |
---|
814 | FORMAT(libtrace)->paused = DPDK_NEVER_STARTED; |
---|
815 | FORMAT(libtrace)->mempool_name[0] = 0; |
---|
816 | memset(FORMAT(libtrace)->burst_pkts, 0, |
---|
817 | sizeof(FORMAT(libtrace)->burst_pkts[0]) * BURST_SIZE); |
---|
818 | FORMAT(libtrace)->burst_size = 0; |
---|
819 | FORMAT(libtrace)->burst_offset = 0; |
---|
820 | |
---|
821 | /* Make our first stream */ |
---|
822 | FORMAT(libtrace)->per_stream = libtrace_list_init(sizeof(struct dpdk_per_stream_t)); |
---|
823 | libtrace_list_push_back(FORMAT(libtrace)->per_stream, &stream); |
---|
824 | |
---|
825 | if (dpdk_init_environment(libtrace->uridata, FORMAT(libtrace), err, sizeof(err)) != 0) { |
---|
826 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, "%s", err); |
---|
827 | free(libtrace->format_data); |
---|
828 | libtrace->format_data = NULL; |
---|
829 | return -1; |
---|
830 | } |
---|
831 | return 0; |
---|
832 | } |
---|
833 | |
---|
834 | static int dpdk_init_output(libtrace_out_t *libtrace) |
---|
835 | { |
---|
836 | char err[500]; |
---|
837 | err[0] = 0; |
---|
838 | |
---|
839 | libtrace->format_data = (struct dpdk_format_data_t *) |
---|
840 | malloc(sizeof(struct dpdk_format_data_t)); |
---|
841 | FORMAT(libtrace)->port = 0; /* Always assume 1 port loaded */ |
---|
842 | FORMAT(libtrace)->nb_ports = 0; |
---|
843 | FORMAT(libtrace)->snaplen = 0; /* Use default */ |
---|
844 | FORMAT(libtrace)->nb_rx_buf = MIN_NB_BUF; |
---|
845 | FORMAT(libtrace)->nb_tx_buf = NB_TX_MBUF; |
---|
846 | FORMAT(libtrace)->nic_numa_node = -1; |
---|
847 | FORMAT(libtrace)->promisc = -1; |
---|
848 | FORMAT(libtrace)->pktmbuf_pool = NULL; |
---|
849 | #if DPDK_USE_BLACKLIST |
---|
850 | FORMAT(libtrace)->nb_blacklist = 0; |
---|
851 | #endif |
---|
852 | FORMAT(libtrace)->paused = DPDK_NEVER_STARTED; |
---|
853 | FORMAT(libtrace)->mempool_name[0] = 0; |
---|
854 | memset(FORMAT(libtrace)->burst_pkts, 0, sizeof(FORMAT(libtrace)->burst_pkts[0]) * BURST_SIZE); |
---|
855 | FORMAT(libtrace)->burst_size = 0; |
---|
856 | FORMAT(libtrace)->burst_offset = 0; |
---|
857 | |
---|
858 | if (dpdk_init_environment(libtrace->uridata, FORMAT(libtrace), err, sizeof(err)) != 0) { |
---|
859 | trace_set_err_out(libtrace, TRACE_ERR_INIT_FAILED, "%s", err); |
---|
860 | free(libtrace->format_data); |
---|
861 | libtrace->format_data = NULL; |
---|
862 | return -1; |
---|
863 | } |
---|
864 | return 0; |
---|
865 | } |
---|
866 | |
---|
867 | /** |
---|
868 | * Note here snaplen excludes the MAC checksum. Packets over |
---|
869 | * the requested snaplen will be dropped. (Excluding MAC checksum) |
---|
870 | * |
---|
871 | * I.e the maximum size of a standard ethernet packet is 1518 (Including MAC checksum) |
---|
872 | * So to allow packets upto 1518 this would be set to 1514 and if GET_MAC_CRC_CHECKSUM |
---|
873 | * is set the maximum size of the returned packet would be 1518 otherwise |
---|
874 | * 1514 would be the largest size possibly returned. |
---|
875 | * |
---|
876 | */ |
---|
877 | static int dpdk_config_input (libtrace_t *libtrace, |
---|
878 | trace_option_t option, |
---|
879 | void *data) { |
---|
880 | switch (option) { |
---|
881 | case TRACE_OPTION_SNAPLEN: |
---|
882 | /* Only support changing snaplen before a call to start is |
---|
883 | * made */ |
---|
884 | if (FORMAT(libtrace)->paused == DPDK_NEVER_STARTED) |
---|
885 | FORMAT(libtrace)->snaplen=*(int*)data; |
---|
886 | else |
---|
887 | return -1; |
---|
888 | return 0; |
---|
889 | case TRACE_OPTION_PROMISC: |
---|
890 | FORMAT(libtrace)->promisc=*(int*)data; |
---|
891 | return 0; |
---|
892 | case TRACE_OPTION_HASHER: |
---|
893 | switch (*((enum hasher_types *) data)) |
---|
894 | { |
---|
895 | case HASHER_BALANCE: |
---|
896 | case HASHER_UNIDIRECTIONAL: |
---|
897 | toeplitz_create_unikey(FORMAT(libtrace)->rss_key); |
---|
898 | return 0; |
---|
899 | case HASHER_BIDIRECTIONAL: |
---|
900 | toeplitz_create_bikey(FORMAT(libtrace)->rss_key); |
---|
901 | return 0; |
---|
902 | case HASHER_CUSTOM: |
---|
903 | // We don't support these |
---|
904 | return -1; |
---|
905 | } |
---|
906 | break; |
---|
907 | case TRACE_OPTION_FILTER: |
---|
908 | /* TODO filtering */ |
---|
909 | case TRACE_OPTION_META_FREQ: |
---|
910 | case TRACE_OPTION_EVENT_REALTIME: |
---|
911 | break; |
---|
912 | /* Avoid default: so that future options will cause a warning |
---|
913 | * here to remind us to implement it, or flag it as |
---|
914 | * unimplementable |
---|
915 | */ |
---|
916 | } |
---|
917 | |
---|
918 | /* Don't set an error - trace_config will try to deal with the |
---|
919 | * option and will set an error if it fails */ |
---|
920 | return -1; |
---|
921 | } |
---|
922 | |
---|
923 | /* Can set jumbo frames/ or limit the size of a frame by setting both |
---|
924 | * max_rx_pkt_len and jumbo_frame. This can be limited to less than |
---|
925 | * |
---|
926 | */ |
---|
927 | static struct rte_eth_conf port_conf = { |
---|
928 | .rxmode = { |
---|
929 | .mq_mode = ETH_RSS, |
---|
930 | .split_hdr_size = 0, |
---|
931 | .header_split = 0, /**< Header Split disabled */ |
---|
932 | .hw_ip_checksum = 0, /**< IP checksum offload disabled */ |
---|
933 | .hw_vlan_filter = 0, /**< VLAN filtering disabled */ |
---|
934 | .jumbo_frame = 0, /**< Jumbo Frame Support disabled */ |
---|
935 | .max_rx_pkt_len = 0, /**< Max frame Size if Jumbo enabled */ |
---|
936 | #if GET_MAC_CRC_CHECKSUM |
---|
937 | /* So it appears that if hw_strip_crc is turned off the driver will still |
---|
938 | * take this off. See line 955ish in lib/librte_pmd_e1000/igb_rxtx.c. |
---|
939 | * So if .hw_strip_crc=0 a valid CRC exists 4 bytes after the end of the |
---|
940 | * So lets just add it back on when we receive the packet. |
---|
941 | */ |
---|
942 | .hw_strip_crc = 0, /**< CRC stripped by hardware */ |
---|
943 | #else |
---|
944 | /* By default strip the MAC checksum because it's a bit of a hack to |
---|
945 | * actually read these. And don't want to rely on disabling this to actualy |
---|
946 | * always cut off the checksum in the future |
---|
947 | */ |
---|
948 | .hw_strip_crc = 1, /**< CRC stripped by hardware */ |
---|
949 | #endif |
---|
950 | }, |
---|
951 | .txmode = { |
---|
952 | .mq_mode = ETH_DCB_NONE, |
---|
953 | }, |
---|
954 | .rx_adv_conf = { |
---|
955 | .rss_conf = { |
---|
956 | // .rss_key = &rss_key, // We set this per format |
---|
957 | .rss_hf = ETH_RSS_IPV4_UDP | ETH_RSS_IPV6 | ETH_RSS_IPV4 | ETH_RSS_IPV4_TCP | ETH_RSS_IPV6_TCP | ETH_RSS_IPV6_UDP, |
---|
958 | }, |
---|
959 | }, |
---|
960 | .intr_conf = { |
---|
961 | .lsc = 1 |
---|
962 | } |
---|
963 | }; |
---|
964 | |
---|
965 | static const struct rte_eth_rxconf rx_conf = { |
---|
966 | .rx_thresh = { |
---|
967 | .pthresh = 8,/* RX_PTHRESH prefetch */ |
---|
968 | .hthresh = 8,/* RX_HTHRESH host */ |
---|
969 | .wthresh = 4,/* RX_WTHRESH writeback */ |
---|
970 | }, |
---|
971 | .rx_free_thresh = 0, |
---|
972 | .rx_drop_en = 0, /* Drop packets oldest packets if out of space */ |
---|
973 | }; |
---|
974 | |
---|
975 | static const struct rte_eth_txconf tx_conf = { |
---|
976 | .tx_thresh = { |
---|
977 | /* |
---|
978 | * TX_PTHRESH prefetch |
---|
979 | * Set on the NIC, if the number of unprocessed descriptors to queued on |
---|
980 | * the card fall below this try grab at least hthresh more unprocessed |
---|
981 | * descriptors. |
---|
982 | */ |
---|
983 | .pthresh = 36, |
---|
984 | |
---|
985 | /* TX_HTHRESH host |
---|
986 | * Set on the NIC, the batch size to prefetch unprocessed tx descriptors. |
---|
987 | */ |
---|
988 | .hthresh = 0, |
---|
989 | |
---|
990 | /* TX_WTHRESH writeback |
---|
991 | * Set on the NIC, the number of sent descriptors before writing back |
---|
992 | * status to confirm the transmission. This is done more efficiently as |
---|
993 | * a bulk DMA-transfer rather than writing one at a time. |
---|
994 | * Similar to tx_free_thresh however this is applied to the NIC, where |
---|
995 | * as tx_free_thresh is when DPDK will check these. This is extended |
---|
996 | * upon by tx_rs_thresh (10Gbit cards) which doesn't write all |
---|
997 | * descriptors rather only every n'th item, reducing DMA memory bandwidth. |
---|
998 | */ |
---|
999 | .wthresh = 4, |
---|
1000 | }, |
---|
1001 | |
---|
1002 | /* Used internally by DPDK rather than passed to the NIC. The number of |
---|
1003 | * packet descriptors to send before checking for any responses written |
---|
1004 | * back (to confirm the transmission). Default = 32 if set to 0) |
---|
1005 | */ |
---|
1006 | .tx_free_thresh = 0, |
---|
1007 | |
---|
1008 | /* This is the Report Status threshold, used by 10Gbit cards, |
---|
1009 | * This signals the card to only write back status (such as |
---|
1010 | * transmission successful) after this minimum number of transmit |
---|
1011 | * descriptors are seen. The default is 32 (if set to 0) however if set |
---|
1012 | * to greater than 1 TX wthresh must be set to zero, because this is kindof |
---|
1013 | * a replacement. See the dpdk programmers guide for more restrictions. |
---|
1014 | */ |
---|
1015 | .tx_rs_thresh = 1, |
---|
1016 | }; |
---|
1017 | |
---|
1018 | /** |
---|
1019 | * A callback for a link state change (LSC). |
---|
1020 | * |
---|
1021 | * Packets may be received before this notification. In fact the DPDK IGXBE |
---|
1022 | * driver likes to put a delay upto 5sec before sending this. |
---|
1023 | * |
---|
1024 | * We use this to ensure the link speed is correct for our timestamp |
---|
1025 | * calculations. Because packets might be received before the link up we still |
---|
1026 | * update this when the packet is received. |
---|
1027 | * |
---|
1028 | * @param port The DPDK port |
---|
1029 | * @param event The TYPE of event (expected to be RTE_ETH_EVENT_INTR_LSC) |
---|
1030 | * @param cb_arg The dpdk_format_data_t structure associated with the format |
---|
1031 | */ |
---|
1032 | static void dpdk_lsc_callback(uint8_t port, enum rte_eth_event_type event, |
---|
1033 | void *cb_arg) { |
---|
1034 | struct dpdk_format_data_t * format_data = cb_arg; |
---|
1035 | struct rte_eth_link link_info; |
---|
1036 | assert(event == RTE_ETH_EVENT_INTR_LSC); |
---|
1037 | assert(port == format_data->port); |
---|
1038 | |
---|
1039 | rte_eth_link_get_nowait(port, &link_info); |
---|
1040 | |
---|
1041 | if (link_info.link_status) |
---|
1042 | format_data->link_speed = link_info.link_speed; |
---|
1043 | else |
---|
1044 | format_data->link_speed = 0; |
---|
1045 | |
---|
1046 | #if DEBUG |
---|
1047 | fprintf(stderr, "LSC - link status is %s %s speed=%d\n", |
---|
1048 | link_info.link_status ? "up" : "down", |
---|
1049 | (link_info.link_duplex == ETH_LINK_FULL_DUPLEX) ? |
---|
1050 | "full-duplex" : "half-duplex", |
---|
1051 | (int) link_info.link_speed); |
---|
1052 | #endif |
---|
1053 | |
---|
1054 | /* Turns out DPDK drivers might not come back up if the link speed |
---|
1055 | * changes. So we reset the autoneg procedure. This is very unsafe |
---|
1056 | * we have have threads reading packets and we stop the port. */ |
---|
1057 | #if 0 |
---|
1058 | if (!link_info.link_status) { |
---|
1059 | int ret; |
---|
1060 | rte_eth_dev_stop(port); |
---|
1061 | ret = rte_eth_dev_start(port); |
---|
1062 | if (ret < 0) { |
---|
1063 | fprintf(stderr, "Resetting the DPDK port failed : %s\n", |
---|
1064 | strerror(-ret)); |
---|
1065 | } |
---|
1066 | } |
---|
1067 | #endif |
---|
1068 | } |
---|
1069 | |
---|
1070 | /** Reserve a DPDK lcore ID for a thread globally. |
---|
1071 | * |
---|
1072 | * @param real If true allocate a real lcore, otherwise allocate a core which |
---|
1073 | * does not exist on the local machine. |
---|
1074 | * @param socket the prefered NUMA socket - only used if a real core is requested |
---|
1075 | * @return a valid core, which can later be used with dpdk_register_lcore() or a |
---|
1076 | * -1 if have run out of cores. |
---|
1077 | * |
---|
1078 | * If any thread is reading or freeing packets we need to register it here |
---|
1079 | * due to TLS caches in the memory pools. |
---|
1080 | */ |
---|
1081 | static int dpdk_reserve_lcore(bool real, int socket) { |
---|
1082 | int new_id = -1; |
---|
1083 | int i; |
---|
1084 | struct rte_config *cfg = rte_eal_get_configuration(); |
---|
1085 | |
---|
1086 | pthread_mutex_lock(&dpdk_lock); |
---|
1087 | /* If 'reading packets' fill in cores from 0 up and bind affinity |
---|
1088 | * otherwise start from the MAX core (which is also the master) and work backwards |
---|
1089 | * in this case physical cores on the system will not exist so we don't bind |
---|
1090 | * these to any particular physical core */ |
---|
1091 | if (real) { |
---|
1092 | #if HAVE_LIBNUMA |
---|
1093 | for (i = 0; i < RTE_MAX_LCORE; ++i) { |
---|
1094 | if (!rte_lcore_is_enabled(i) && numa_node_of_cpu(i) == socket) { |
---|
1095 | new_id = i; |
---|
1096 | if (!lcore_config[i].detected) |
---|
1097 | new_id = -1; |
---|
1098 | break; |
---|
1099 | } |
---|
1100 | } |
---|
1101 | #endif |
---|
1102 | /* Retry without the the numa restriction */ |
---|
1103 | if (new_id == -1) { |
---|
1104 | for (i = 0; i < RTE_MAX_LCORE; ++i) { |
---|
1105 | if (!rte_lcore_is_enabled(i)) { |
---|
1106 | new_id = i; |
---|
1107 | if (!lcore_config[i].detected) |
---|
1108 | fprintf(stderr, "Warning the" |
---|
1109 | " number of 'reading' " |
---|
1110 | "threads exceed cores\n"); |
---|
1111 | break; |
---|
1112 | } |
---|
1113 | } |
---|
1114 | } |
---|
1115 | } else { |
---|
1116 | for (i = RTE_MAX_LCORE-1; i >= 0; --i) { |
---|
1117 | if (!rte_lcore_is_enabled(i)) { |
---|
1118 | new_id = i; |
---|
1119 | break; |
---|
1120 | } |
---|
1121 | } |
---|
1122 | } |
---|
1123 | |
---|
1124 | if (new_id != -1) { |
---|
1125 | /* Enable the core in global DPDK structs */ |
---|
1126 | cfg->lcore_role[new_id] = ROLE_RTE; |
---|
1127 | cfg->lcore_count++; |
---|
1128 | } |
---|
1129 | |
---|
1130 | pthread_mutex_unlock(&dpdk_lock); |
---|
1131 | return new_id; |
---|
1132 | } |
---|
1133 | |
---|
1134 | /** Register a thread as a lcore |
---|
1135 | * @param libtrace any error is set against libtrace on exit |
---|
1136 | * @param real If this is a true lcore we will bind its affinty to the |
---|
1137 | * requested core. |
---|
1138 | * @param lcore The lcore as retrieved from dpdk_reserve_lcore() |
---|
1139 | * @return 0, if successful otherwise -1 if an error occured (details are stored |
---|
1140 | * in libtrace) |
---|
1141 | * |
---|
1142 | * @note This must be called from the thread being registered. |
---|
1143 | */ |
---|
1144 | static int dpdk_register_lcore(libtrace_t *libtrace, bool real, int lcore) { |
---|
1145 | int ret; |
---|
1146 | RTE_PER_LCORE(_lcore_id) = lcore; |
---|
1147 | |
---|
1148 | /* Set affinity bind to corresponding core */ |
---|
1149 | if (real) { |
---|
1150 | cpu_set_t cpuset; |
---|
1151 | CPU_ZERO(&cpuset); |
---|
1152 | CPU_SET(rte_lcore_id(), &cpuset); |
---|
1153 | ret = pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset); |
---|
1154 | if (ret != 0) { |
---|
1155 | trace_set_err(libtrace, errno, "Warning " |
---|
1156 | "pthread_setaffinity_np failed"); |
---|
1157 | return -1; |
---|
1158 | } |
---|
1159 | } |
---|
1160 | |
---|
1161 | return 0; |
---|
1162 | } |
---|
1163 | |
---|
1164 | /** Allocates a new dpdk packet buffer memory pool. |
---|
1165 | * |
---|
1166 | * @param n The number of threads |
---|
1167 | * @param pkt_size The packet size we need ot store |
---|
1168 | * @param socket_id The NUMA socket id |
---|
1169 | * @param A new mempool, if NULL query the DPDK library for the error code |
---|
1170 | * see rte_mempool_create() documentation. |
---|
1171 | * |
---|
1172 | * This allocates a new pool or recycles an existing memory pool. |
---|
1173 | * Call dpdk_free_memory() to free the memory. |
---|
1174 | * We cannot delete memory so instead we store the pools, allowing them to be |
---|
1175 | * re-used. |
---|
1176 | */ |
---|
1177 | static struct rte_mempool *dpdk_alloc_memory(unsigned n, |
---|
1178 | unsigned pkt_size, |
---|
1179 | int socket_id) { |
---|
1180 | struct rte_mempool *ret; |
---|
1181 | size_t j,k; |
---|
1182 | char name[MEMPOOL_NAME_LEN]; |
---|
1183 | |
---|
1184 | /* Add on packet size overheads */ |
---|
1185 | pkt_size += sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM; |
---|
1186 | |
---|
1187 | pthread_mutex_lock(&dpdk_lock); |
---|
1188 | |
---|
1189 | if (socket_id == SOCKET_ID_ANY || socket_id > 4) { |
---|
1190 | /* Best guess go for zero */ |
---|
1191 | socket_id = 0; |
---|
1192 | } |
---|
1193 | |
---|
1194 | /* Find a valid pool */ |
---|
1195 | for (j = 0; j < RTE_MAX_LCORE && mem_pools[socket_id][j]; ++j) { |
---|
1196 | if (mem_pools[socket_id][j]->size >= n && |
---|
1197 | mem_pools[socket_id][j]->elt_size >= pkt_size) { |
---|
1198 | break; |
---|
1199 | } |
---|
1200 | } |
---|
1201 | |
---|
1202 | /* Find the end (+1) of the list */ |
---|
1203 | for (k = j; k < RTE_MAX_LCORE && mem_pools[socket_id][k]; ++k) {} |
---|
1204 | |
---|
1205 | if (mem_pools[socket_id][j]) { |
---|
1206 | ret = mem_pools[socket_id][j]; |
---|
1207 | mem_pools[socket_id][j] = mem_pools[socket_id][k-1]; |
---|
1208 | mem_pools[socket_id][k-1] = NULL; |
---|
1209 | mem_pools[socket_id][j] = NULL; |
---|
1210 | } else { |
---|
1211 | static uint32_t test = 10; |
---|
1212 | test++; |
---|
1213 | snprintf(name, MEMPOOL_NAME_LEN, |
---|
1214 | "libtrace_pool_%"PRIu32, test); |
---|
1215 | |
---|
1216 | ret = rte_mempool_create(name, n, pkt_size, |
---|
1217 | 128, sizeof(struct rte_pktmbuf_pool_private), |
---|
1218 | rte_pktmbuf_pool_init, NULL, |
---|
1219 | rte_pktmbuf_init, NULL, |
---|
1220 | socket_id, 0); |
---|
1221 | } |
---|
1222 | |
---|
1223 | pthread_mutex_unlock(&dpdk_lock); |
---|
1224 | return ret; |
---|
1225 | } |
---|
1226 | |
---|
1227 | /** Stores the memory against the DPDK library. |
---|
1228 | * |
---|
1229 | * @param mempool The mempool to free |
---|
1230 | * @param socket_id The NUMA socket this mempool was allocated upon. |
---|
1231 | * |
---|
1232 | * Because we cannot free a memory pool, we verify it's full (i.e. unused) and |
---|
1233 | * store the memory shared globally against the format. |
---|
1234 | */ |
---|
1235 | static void dpdk_free_memory(struct rte_mempool *mempool, int socket_id) { |
---|
1236 | size_t i; |
---|
1237 | pthread_mutex_lock(&dpdk_lock); |
---|
1238 | |
---|
1239 | /* We should have all entries back in the mempool */ |
---|
1240 | rte_mempool_audit(mempool); |
---|
1241 | if (!rte_mempool_full(mempool)) { |
---|
1242 | fprintf(stderr, "DPDK memory pool not empty %d of %d, please " |
---|
1243 | "free all packets before finishing a trace\n", |
---|
1244 | rte_mempool_count(mempool), mempool->size); |
---|
1245 | } |
---|
1246 | |
---|
1247 | /* Find the end (+1) of the list */ |
---|
1248 | for (i = 0; i < RTE_MAX_LCORE && mem_pools[socket_id][i]; ++i) {} |
---|
1249 | |
---|
1250 | if (i >= RTE_MAX_LCORE) { |
---|
1251 | fprintf(stderr, "Too many memory pools, dropping this one\n"); |
---|
1252 | } else { |
---|
1253 | mem_pools[socket_id][i] = mempool; |
---|
1254 | } |
---|
1255 | |
---|
1256 | pthread_mutex_unlock(&dpdk_lock); |
---|
1257 | } |
---|
1258 | |
---|
1259 | /* Attach memory to the port and start (or restart) the port/s. |
---|
1260 | */ |
---|
1261 | static int dpdk_start_streams(struct dpdk_format_data_t *format_data, |
---|
1262 | char *err, int errlen, uint16_t rx_queues) { |
---|
1263 | int ret, i; |
---|
1264 | struct rte_eth_link link_info; /* Wait for link */ |
---|
1265 | dpdk_per_stream_t empty_stream = DPDK_EMPTY_STREAM; |
---|
1266 | |
---|
1267 | /* Already started */ |
---|
1268 | if (format_data->paused == DPDK_RUNNING) |
---|
1269 | return 0; |
---|
1270 | |
---|
1271 | /* First time started we need to alloc our memory, doing this here |
---|
1272 | * rather than in environment setup because we don't have snaplen then */ |
---|
1273 | if (format_data->paused == DPDK_NEVER_STARTED) { |
---|
1274 | if (format_data->snaplen == 0) { |
---|
1275 | format_data->snaplen = RX_MBUF_SIZE; |
---|
1276 | port_conf.rxmode.jumbo_frame = 0; |
---|
1277 | port_conf.rxmode.max_rx_pkt_len = 0; |
---|
1278 | } else { |
---|
1279 | /* Use jumbo frames */ |
---|
1280 | port_conf.rxmode.jumbo_frame = 1; |
---|
1281 | port_conf.rxmode.max_rx_pkt_len = format_data->snaplen; |
---|
1282 | } |
---|
1283 | |
---|
1284 | #if GET_MAC_CRC_CHECKSUM |
---|
1285 | /* This is additional overhead so make sure we allow space for this */ |
---|
1286 | format_data->snaplen += ETHER_CRC_LEN; |
---|
1287 | #endif |
---|
1288 | #if HAS_HW_TIMESTAMPS_82580 |
---|
1289 | format_data->snaplen += sizeof(struct hw_timestamp_82580); |
---|
1290 | #endif |
---|
1291 | |
---|
1292 | /* Create the mbuf pool, which is the place packets are allocated |
---|
1293 | * from - There is no free function (I cannot see one). |
---|
1294 | * NOTE: RX queue requires nb_packets + 1 otherwise it fails to |
---|
1295 | * allocate however that extra 1 packet is not used. |
---|
1296 | * (I assume <= vs < error some where in DPDK code) |
---|
1297 | * TX requires nb_tx_buffers + 1 in the case the queue is full |
---|
1298 | * so that will fill the new buffer and wait until slots in the |
---|
1299 | * ring become available. |
---|
1300 | */ |
---|
1301 | #if DEBUG |
---|
1302 | fprintf(stderr, "Creating mempool named %s\n", format_data->mempool_name); |
---|
1303 | #endif |
---|
1304 | format_data->pktmbuf_pool = dpdk_alloc_memory(format_data->nb_tx_buf*2, |
---|
1305 | format_data->snaplen, |
---|
1306 | format_data->nic_numa_node); |
---|
1307 | |
---|
1308 | if (format_data->pktmbuf_pool == NULL) { |
---|
1309 | snprintf(err, errlen, "Intel DPDK - Initialisation of mbuf " |
---|
1310 | "pool failed: %s", strerror(rte_errno)); |
---|
1311 | return -1; |
---|
1312 | } |
---|
1313 | } |
---|
1314 | |
---|
1315 | /* ----------- Now do the setup for the port mapping ------------ */ |
---|
1316 | /* Order of calls must be |
---|
1317 | * rte_eth_dev_configure() |
---|
1318 | * rte_eth_tx_queue_setup() |
---|
1319 | * rte_eth_rx_queue_setup() |
---|
1320 | * rte_eth_dev_start() |
---|
1321 | * other rte_eth calls |
---|
1322 | */ |
---|
1323 | |
---|
1324 | /* This must be called first before another *eth* function |
---|
1325 | * 1+ rx, 1 tx queues, port_conf sets checksum stripping etc */ |
---|
1326 | ret = rte_eth_dev_configure(format_data->port, rx_queues, 1, &port_conf); |
---|
1327 | if (ret < 0) { |
---|
1328 | snprintf(err, errlen, "Intel DPDK - Cannot configure device port" |
---|
1329 | " %"PRIu8" : %s", format_data->port, |
---|
1330 | strerror(-ret)); |
---|
1331 | return -1; |
---|
1332 | } |
---|
1333 | #if DEBUG |
---|
1334 | fprintf(stderr, "Doing dev configure\n"); |
---|
1335 | #endif |
---|
1336 | /* Initialise the TX queue a minimum value if using this port for |
---|
1337 | * receiving. Otherwise a larger size if writing packets. |
---|
1338 | */ |
---|
1339 | ret = rte_eth_tx_queue_setup(format_data->port, |
---|
1340 | 0 /* queue XXX */, |
---|
1341 | format_data->nb_tx_buf, |
---|
1342 | SOCKET_ID_ANY, |
---|
1343 | &tx_conf); |
---|
1344 | if (ret < 0) { |
---|
1345 | snprintf(err, errlen, "Intel DPDK - Cannot configure TX queue" |
---|
1346 | " on port %"PRIu8" : %s", format_data->port, |
---|
1347 | strerror(-ret)); |
---|
1348 | return -1; |
---|
1349 | } |
---|
1350 | |
---|
1351 | /* Attach memory to our RX queues */ |
---|
1352 | for (i=0; i < rx_queues; i++) { |
---|
1353 | dpdk_per_stream_t *stream; |
---|
1354 | #if DEBUG |
---|
1355 | fprintf(stderr, "Configuring queue %d\n", i); |
---|
1356 | #endif |
---|
1357 | |
---|
1358 | /* Add storage for the stream */ |
---|
1359 | if (libtrace_list_get_size(format_data->per_stream) <= (size_t) i) |
---|
1360 | libtrace_list_push_back(format_data->per_stream, &empty_stream); |
---|
1361 | stream = libtrace_list_get_index(format_data->per_stream, i)->data; |
---|
1362 | stream->queue_id = i; |
---|
1363 | |
---|
1364 | if (stream->lcore == -1) |
---|
1365 | stream->lcore = dpdk_reserve_lcore(true, format_data->nic_numa_node); |
---|
1366 | |
---|
1367 | if (stream->lcore == -1) { |
---|
1368 | snprintf(err, errlen, "Intel DPDK - Failed to reserve a lcore" |
---|
1369 | ". Too many threads?"); |
---|
1370 | return -1; |
---|
1371 | } |
---|
1372 | |
---|
1373 | if (stream->mempool == NULL) { |
---|
1374 | stream->mempool = dpdk_alloc_memory( |
---|
1375 | format_data->nb_rx_buf*2, |
---|
1376 | format_data->snaplen, |
---|
1377 | rte_lcore_to_socket_id(stream->lcore)); |
---|
1378 | |
---|
1379 | if (stream->mempool == NULL) { |
---|
1380 | snprintf(err, errlen, "Intel DPDK - Initialisation of mbuf " |
---|
1381 | "pool failed: %s", strerror(rte_errno)); |
---|
1382 | return -1; |
---|
1383 | } |
---|
1384 | } |
---|
1385 | |
---|
1386 | /* Initialise the RX queue with some packets from memory */ |
---|
1387 | ret = rte_eth_rx_queue_setup(format_data->port, |
---|
1388 | stream->queue_id, |
---|
1389 | format_data->nb_rx_buf, |
---|
1390 | format_data->nic_numa_node, |
---|
1391 | &rx_conf, |
---|
1392 | stream->mempool); |
---|
1393 | if (ret < 0) { |
---|
1394 | snprintf(err, errlen, "Intel DPDK - Cannot configure" |
---|
1395 | " RX queue on port %"PRIu8" : %s", |
---|
1396 | format_data->port, |
---|
1397 | strerror(-ret)); |
---|
1398 | return -1; |
---|
1399 | } |
---|
1400 | } |
---|
1401 | |
---|
1402 | #if DEBUG |
---|
1403 | fprintf(stderr, "Doing start device\n"); |
---|
1404 | #endif |
---|
1405 | rte_eth_stats_reset(format_data->port); |
---|
1406 | /* Start device */ |
---|
1407 | ret = rte_eth_dev_start(format_data->port); |
---|
1408 | if (ret < 0) { |
---|
1409 | snprintf(err, errlen, "Intel DPDK - rte_eth_dev_start failed : %s", |
---|
1410 | strerror(-ret)); |
---|
1411 | return -1; |
---|
1412 | } |
---|
1413 | |
---|
1414 | /* Default promiscuous to on */ |
---|
1415 | if (format_data->promisc == -1) |
---|
1416 | format_data->promisc = 1; |
---|
1417 | |
---|
1418 | if (format_data->promisc == 1) |
---|
1419 | rte_eth_promiscuous_enable(format_data->port); |
---|
1420 | else |
---|
1421 | rte_eth_promiscuous_disable(format_data->port); |
---|
1422 | |
---|
1423 | /* We have now successfully started/unpased */ |
---|
1424 | format_data->paused = DPDK_RUNNING; |
---|
1425 | |
---|
1426 | |
---|
1427 | /* Register a callback for link state changes */ |
---|
1428 | ret = rte_eth_dev_callback_register(format_data->port, |
---|
1429 | RTE_ETH_EVENT_INTR_LSC, |
---|
1430 | dpdk_lsc_callback, |
---|
1431 | format_data); |
---|
1432 | #if DEBUG |
---|
1433 | if (ret) |
---|
1434 | fprintf(stderr, "rte_eth_dev_callback_register failed %d : %s\n", |
---|
1435 | ret, strerror(-ret)); |
---|
1436 | #endif |
---|
1437 | |
---|
1438 | /* Get the current link status */ |
---|
1439 | rte_eth_link_get_nowait(format_data->port, &link_info); |
---|
1440 | format_data->link_speed = link_info.link_speed; |
---|
1441 | #if DEBUG |
---|
1442 | fprintf(stderr, "Link status is %d %d %d\n", (int) link_info.link_status, |
---|
1443 | (int) link_info.link_duplex, (int) link_info.link_speed); |
---|
1444 | #endif |
---|
1445 | |
---|
1446 | return 0; |
---|
1447 | } |
---|
1448 | |
---|
1449 | static int dpdk_start_input (libtrace_t *libtrace) { |
---|
1450 | char err[500]; |
---|
1451 | err[0] = 0; |
---|
1452 | |
---|
1453 | /* Make sure we don't reserve an extra thread for this */ |
---|
1454 | FORMAT_DATA_FIRST(libtrace)->queue_id = rte_lcore_id(); |
---|
1455 | |
---|
1456 | if (dpdk_start_streams(FORMAT(libtrace), err, sizeof(err), 1) != 0) { |
---|
1457 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, "%s", err); |
---|
1458 | free(libtrace->format_data); |
---|
1459 | libtrace->format_data = NULL; |
---|
1460 | return -1; |
---|
1461 | } |
---|
1462 | return 0; |
---|
1463 | } |
---|
1464 | |
---|
1465 | static inline size_t dpdk_get_max_rx_queues (uint8_t port_id) { |
---|
1466 | struct rte_eth_dev_info dev_info; |
---|
1467 | rte_eth_dev_info_get(port_id, &dev_info); |
---|
1468 | return dev_info.max_rx_queues; |
---|
1469 | } |
---|
1470 | |
---|
1471 | static inline size_t dpdk_processor_count () { |
---|
1472 | long nb_cpu = sysconf(_SC_NPROCESSORS_ONLN); |
---|
1473 | if (nb_cpu <= 0) |
---|
1474 | return 1; |
---|
1475 | else |
---|
1476 | return (size_t) nb_cpu; |
---|
1477 | } |
---|
1478 | |
---|
1479 | static int dpdk_pstart_input (libtrace_t *libtrace) { |
---|
1480 | char err[500]; |
---|
1481 | int i=0, phys_cores=0; |
---|
1482 | int tot = libtrace->perpkt_thread_count; |
---|
1483 | libtrace_list_node_t *n; |
---|
1484 | err[0] = 0; |
---|
1485 | |
---|
1486 | if (rte_lcore_id() != rte_get_master_lcore()) |
---|
1487 | fprintf(stderr, "Warning dpdk_pstart_input should be called" |
---|
1488 | " from the master DPDK thread!\n"); |
---|
1489 | |
---|
1490 | /* If the master is not on the last thread we move it there */ |
---|
1491 | if (rte_get_master_lcore() != RTE_MAX_LCORE - 1) { |
---|
1492 | if (dpdk_move_master_lcore(libtrace, RTE_MAX_LCORE - 1) != 0) |
---|
1493 | return -1; |
---|
1494 | } |
---|
1495 | |
---|
1496 | /* Don't exceed the number of cores in the system/detected by dpdk |
---|
1497 | * We don't have to force this but performance wont be good if we don't */ |
---|
1498 | for (i = 0; i < RTE_MAX_LCORE; ++i) { |
---|
1499 | if (lcore_config[i].detected) { |
---|
1500 | if (rte_lcore_is_enabled(i)) { |
---|
1501 | #if DEBUG |
---|
1502 | fprintf(stderr, "Found core %d already in use!\n", i); |
---|
1503 | #endif |
---|
1504 | } else { |
---|
1505 | phys_cores++; |
---|
1506 | } |
---|
1507 | } |
---|
1508 | } |
---|
1509 | /* If we are restarting we have already allocated some threads as such |
---|
1510 | * we add these back to the count for this calculation */ |
---|
1511 | for (n = FORMAT_DATA_HEAD(libtrace); n; n = n->next) { |
---|
1512 | dpdk_per_stream_t * stream = n->data; |
---|
1513 | if (stream->lcore != -1) |
---|
1514 | phys_cores++; |
---|
1515 | } |
---|
1516 | |
---|
1517 | tot = MIN(libtrace->perpkt_thread_count, |
---|
1518 | dpdk_get_max_rx_queues(FORMAT(libtrace)->port)); |
---|
1519 | tot = MIN(tot, phys_cores); |
---|
1520 | |
---|
1521 | #if DEBUG |
---|
1522 | fprintf(stderr, "Running pstart DPDK tot=%d req=%d phys=%d\n", tot, |
---|
1523 | libtrace->perpkt_thread_count, phys_cores); |
---|
1524 | #endif |
---|
1525 | |
---|
1526 | if (dpdk_start_streams(FORMAT(libtrace), err, sizeof(err), tot) != 0) { |
---|
1527 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, "%s", err); |
---|
1528 | free(libtrace->format_data); |
---|
1529 | libtrace->format_data = NULL; |
---|
1530 | return -1; |
---|
1531 | } |
---|
1532 | |
---|
1533 | /* Make sure we only start the number that we should */ |
---|
1534 | libtrace->perpkt_thread_count = tot; |
---|
1535 | return 0; |
---|
1536 | } |
---|
1537 | |
---|
1538 | /** |
---|
1539 | * Register a thread with the DPDK system, |
---|
1540 | * When we start DPDK in parallel libtrace we move the 'main thread' to the |
---|
1541 | * MAXIMUM CPU core slot (32) and remove any affinity restrictions DPDK |
---|
1542 | * gives it. |
---|
1543 | * |
---|
1544 | * We then allow a mapper thread to be started on every real core as DPDK would, |
---|
1545 | * we also bind these to the corresponding CPU cores. |
---|
1546 | * |
---|
1547 | * @param libtrace A pointer to the trace |
---|
1548 | * @param reading True if the thread will be used to read packets, i.e. will |
---|
1549 | * call pread_packet(), false if thread used to process packet |
---|
1550 | * in any other manner including statistics functions. |
---|
1551 | */ |
---|
1552 | static int dpdk_pregister_thread(libtrace_t *libtrace, libtrace_thread_t *t, bool reading) |
---|
1553 | { |
---|
1554 | #if DEBUG |
---|
1555 | char name[99]; |
---|
1556 | pthread_getname_np(pthread_self(), |
---|
1557 | name, sizeof(name)); |
---|
1558 | #endif |
---|
1559 | if (reading) { |
---|
1560 | dpdk_per_stream_t *stream; |
---|
1561 | /* Attach our thread */ |
---|
1562 | if(t->type == THREAD_PERPKT) { |
---|
1563 | t->format_data = libtrace_list_get_index(FORMAT(libtrace)->per_stream, t->perpkt_num)->data; |
---|
1564 | if (t->format_data == NULL) { |
---|
1565 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
1566 | "Too many threads registered"); |
---|
1567 | return -1; |
---|
1568 | } |
---|
1569 | } else { |
---|
1570 | t->format_data = FORMAT_DATA_FIRST(libtrace); |
---|
1571 | } |
---|
1572 | stream = t->format_data; |
---|
1573 | #if DEBUG |
---|
1574 | fprintf(stderr, "%s new id memory:%s cpu-core:%d\n", name, stream->mempool->name, rte_lcore_id()); |
---|
1575 | #endif |
---|
1576 | return dpdk_register_lcore(libtrace, true, stream->lcore); |
---|
1577 | } else { |
---|
1578 | int lcore = dpdk_reserve_lcore(reading, 0); |
---|
1579 | if (lcore == -1) { |
---|
1580 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, "Too many threads" |
---|
1581 | " for DPDK"); |
---|
1582 | return -1; |
---|
1583 | } |
---|
1584 | #if DEBUG |
---|
1585 | fprintf(stderr, "%s new id cpu-core:%d\n", name, rte_lcore_id()); |
---|
1586 | #endif |
---|
1587 | return dpdk_register_lcore(libtrace, false, lcore); |
---|
1588 | } |
---|
1589 | |
---|
1590 | return 0; |
---|
1591 | } |
---|
1592 | |
---|
1593 | /** |
---|
1594 | * Unregister a thread with the DPDK system. |
---|
1595 | * |
---|
1596 | * Only previously registered threads should be calling this just before |
---|
1597 | * they are destroyed. |
---|
1598 | */ |
---|
1599 | static void dpdk_punregister_thread(libtrace_t *libtrace UNUSED, libtrace_thread_t *t UNUSED) |
---|
1600 | { |
---|
1601 | struct rte_config *cfg = rte_eal_get_configuration(); |
---|
1602 | |
---|
1603 | assert(rte_lcore_id() < RTE_MAX_LCORE); |
---|
1604 | pthread_mutex_lock(&dpdk_lock); |
---|
1605 | /* Skip if master */ |
---|
1606 | if (rte_lcore_id() == rte_get_master_lcore()) { |
---|
1607 | fprintf(stderr, "INFO: we are skipping unregistering the master lcore\n"); |
---|
1608 | pthread_mutex_unlock(&dpdk_lock); |
---|
1609 | return; |
---|
1610 | } |
---|
1611 | |
---|
1612 | /* Disable this core in global DPDK structs */ |
---|
1613 | cfg->lcore_role[rte_lcore_id()] = ROLE_OFF; |
---|
1614 | cfg->lcore_count--; |
---|
1615 | RTE_PER_LCORE(_lcore_id) = -1; // Might make the world burn if used again |
---|
1616 | assert(cfg->lcore_count >= 1); // We cannot unregister the master LCORE!! |
---|
1617 | pthread_mutex_unlock(&dpdk_lock); |
---|
1618 | return; |
---|
1619 | } |
---|
1620 | |
---|
1621 | static int dpdk_start_output(libtrace_out_t *libtrace) |
---|
1622 | { |
---|
1623 | char err[500]; |
---|
1624 | err[0] = 0; |
---|
1625 | |
---|
1626 | if (dpdk_start_streams(FORMAT(libtrace), err, sizeof(err), 1) != 0) { |
---|
1627 | trace_set_err_out(libtrace, TRACE_ERR_INIT_FAILED, "%s", err); |
---|
1628 | free(libtrace->format_data); |
---|
1629 | libtrace->format_data = NULL; |
---|
1630 | return -1; |
---|
1631 | } |
---|
1632 | return 0; |
---|
1633 | } |
---|
1634 | |
---|
1635 | static int dpdk_pause_input(libtrace_t * libtrace) { |
---|
1636 | libtrace_list_node_t *tmp = FORMAT_DATA_HEAD(libtrace); |
---|
1637 | /* This stops the device, but can be restarted using rte_eth_dev_start() */ |
---|
1638 | if (FORMAT(libtrace)->paused == DPDK_RUNNING) { |
---|
1639 | #if DEBUG |
---|
1640 | fprintf(stderr, "Pausing DPDK port\n"); |
---|
1641 | #endif |
---|
1642 | rte_eth_dev_stop(FORMAT(libtrace)->port); |
---|
1643 | FORMAT(libtrace)->paused = DPDK_PAUSED; |
---|
1644 | /* Empty the queue of packets */ |
---|
1645 | for (; FORMAT(libtrace)->burst_offset < FORMAT(libtrace)->burst_size; ++FORMAT(libtrace)->burst_offset) { |
---|
1646 | rte_pktmbuf_free(FORMAT(libtrace)->burst_pkts[FORMAT(libtrace)->burst_offset]); |
---|
1647 | } |
---|
1648 | FORMAT(libtrace)->burst_offset = 0; |
---|
1649 | FORMAT(libtrace)->burst_size = 0; |
---|
1650 | |
---|
1651 | for (; tmp != NULL; tmp = tmp->next) { |
---|
1652 | dpdk_per_stream_t *stream = tmp->data; |
---|
1653 | stream->ts_last_sys = 0; |
---|
1654 | #if HAS_HW_TIMESTAMPS_82580 |
---|
1655 | stream->ts_first_sys = 0; |
---|
1656 | #endif |
---|
1657 | } |
---|
1658 | |
---|
1659 | } |
---|
1660 | return 0; |
---|
1661 | } |
---|
1662 | |
---|
1663 | static int dpdk_write_packet(libtrace_out_t *trace, |
---|
1664 | libtrace_packet_t *packet){ |
---|
1665 | struct rte_mbuf* m_buff[1]; |
---|
1666 | |
---|
1667 | int wirelen = trace_get_wire_length(packet); |
---|
1668 | int caplen = trace_get_capture_length(packet); |
---|
1669 | |
---|
1670 | /* Check for a checksum and remove it */ |
---|
1671 | if (trace_get_link_type(packet) == TRACE_TYPE_ETH && |
---|
1672 | wirelen == caplen) |
---|
1673 | caplen -= ETHER_CRC_LEN; |
---|
1674 | |
---|
1675 | m_buff[0] = rte_pktmbuf_alloc(FORMAT(trace)->pktmbuf_pool); |
---|
1676 | if (m_buff[0] == NULL) { |
---|
1677 | trace_set_err_out(trace, errno, "Cannot get an empty packet buffer"); |
---|
1678 | return -1; |
---|
1679 | } else { |
---|
1680 | int ret; |
---|
1681 | memcpy(rte_pktmbuf_append(m_buff[0], caplen), packet->payload, caplen); |
---|
1682 | do { |
---|
1683 | ret = rte_eth_tx_burst(0 /*queue TODO*/, FORMAT(trace)->port, m_buff, 1); |
---|
1684 | } while (ret != 1); |
---|
1685 | } |
---|
1686 | |
---|
1687 | return 0; |
---|
1688 | } |
---|
1689 | |
---|
1690 | static int dpdk_fin_input(libtrace_t * libtrace) { |
---|
1691 | libtrace_list_node_t * n; |
---|
1692 | /* Free our memory structures */ |
---|
1693 | if (libtrace->format_data != NULL) { |
---|
1694 | |
---|
1695 | if (FORMAT(libtrace)->port != 0xFF) |
---|
1696 | rte_eth_dev_callback_unregister(FORMAT(libtrace)->port, |
---|
1697 | RTE_ETH_EVENT_INTR_LSC, |
---|
1698 | dpdk_lsc_callback, |
---|
1699 | FORMAT(libtrace)); |
---|
1700 | /* Close the device completely, device cannot be restarted */ |
---|
1701 | rte_eth_dev_close(FORMAT(libtrace)->port); |
---|
1702 | |
---|
1703 | dpdk_free_memory(FORMAT(libtrace)->pktmbuf_pool, |
---|
1704 | FORMAT(libtrace)->nic_numa_node); |
---|
1705 | |
---|
1706 | for (n = FORMAT(libtrace)->per_stream->head; n ; n = n->next) { |
---|
1707 | dpdk_per_stream_t * stream = n->data; |
---|
1708 | if (stream->mempool) |
---|
1709 | dpdk_free_memory(stream->mempool, |
---|
1710 | rte_lcore_to_socket_id(stream->lcore)); |
---|
1711 | } |
---|
1712 | |
---|
1713 | libtrace_list_deinit(FORMAT(libtrace)->per_stream); |
---|
1714 | /* filter here if we used it */ |
---|
1715 | free(libtrace->format_data); |
---|
1716 | } |
---|
1717 | |
---|
1718 | return 0; |
---|
1719 | } |
---|
1720 | |
---|
1721 | |
---|
1722 | static int dpdk_fin_output(libtrace_out_t * libtrace) { |
---|
1723 | /* Free our memory structures */ |
---|
1724 | if (libtrace->format_data != NULL) { |
---|
1725 | /* Close the device completely, device cannot be restarted */ |
---|
1726 | if (FORMAT(libtrace)->port != 0xFF) |
---|
1727 | rte_eth_dev_close(FORMAT(libtrace)->port); |
---|
1728 | libtrace_list_deinit(FORMAT(libtrace)->per_stream); |
---|
1729 | /* filter here if we used it */ |
---|
1730 | free(libtrace->format_data); |
---|
1731 | } |
---|
1732 | |
---|
1733 | return 0; |
---|
1734 | } |
---|
1735 | |
---|
1736 | /** |
---|
1737 | * Get the start of the additional header that we added to a packet. |
---|
1738 | */ |
---|
1739 | static inline struct dpdk_addt_hdr * get_addt_hdr (const libtrace_packet_t *packet) { |
---|
1740 | assert(packet); |
---|
1741 | assert(packet->buffer); |
---|
1742 | /* Our header sits straight after the mbuf header */ |
---|
1743 | return (struct dpdk_addt_hdr *) ((struct rte_mbuf*) packet->buffer + 1); |
---|
1744 | } |
---|
1745 | |
---|
1746 | static int dpdk_get_capture_length (const libtrace_packet_t *packet) { |
---|
1747 | struct dpdk_addt_hdr * hdr = get_addt_hdr(packet); |
---|
1748 | return hdr->cap_len; |
---|
1749 | } |
---|
1750 | |
---|
1751 | static size_t dpdk_set_capture_length(libtrace_packet_t *packet, size_t size) { |
---|
1752 | struct dpdk_addt_hdr * hdr = get_addt_hdr(packet); |
---|
1753 | if (size > hdr->cap_len) { |
---|
1754 | /* Cannot make a packet bigger */ |
---|
1755 | return trace_get_capture_length(packet); |
---|
1756 | } |
---|
1757 | |
---|
1758 | /* Reset the cached capture length first*/ |
---|
1759 | packet->capture_length = -1; |
---|
1760 | hdr->cap_len = (uint32_t) size; |
---|
1761 | return trace_get_capture_length(packet); |
---|
1762 | } |
---|
1763 | |
---|
1764 | static int dpdk_get_wire_length (const libtrace_packet_t *packet) { |
---|
1765 | struct dpdk_addt_hdr * hdr = get_addt_hdr(packet); |
---|
1766 | int org_cap_size; /* The original capture size */ |
---|
1767 | if (hdr->flags & INCLUDES_HW_TIMESTAMP) { |
---|
1768 | org_cap_size = (int) rte_pktmbuf_pkt_len(MBUF(packet->buffer)) - |
---|
1769 | sizeof(struct hw_timestamp_82580); |
---|
1770 | } else { |
---|
1771 | org_cap_size = (int) rte_pktmbuf_pkt_len(MBUF(packet->buffer)); |
---|
1772 | } |
---|
1773 | if (hdr->flags & INCLUDES_CHECKSUM) { |
---|
1774 | return org_cap_size; |
---|
1775 | } else { |
---|
1776 | /* DPDK packets are always TRACE_TYPE_ETH packets */ |
---|
1777 | return org_cap_size + ETHER_CRC_LEN; |
---|
1778 | } |
---|
1779 | } |
---|
1780 | |
---|
1781 | static int dpdk_get_framing_length (const libtrace_packet_t *packet) { |
---|
1782 | struct dpdk_addt_hdr * hdr = get_addt_hdr(packet); |
---|
1783 | if (hdr->flags & INCLUDES_HW_TIMESTAMP) |
---|
1784 | return sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM + |
---|
1785 | sizeof(struct hw_timestamp_82580); |
---|
1786 | else |
---|
1787 | return sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM; |
---|
1788 | } |
---|
1789 | |
---|
1790 | static int dpdk_prepare_packet(libtrace_t *libtrace UNUSED, |
---|
1791 | libtrace_packet_t *packet, void *buffer, |
---|
1792 | libtrace_rt_types_t rt_type, uint32_t flags) { |
---|
1793 | assert(packet); |
---|
1794 | if (packet->buffer != buffer && |
---|
1795 | packet->buf_control == TRACE_CTRL_PACKET) { |
---|
1796 | free(packet->buffer); |
---|
1797 | } |
---|
1798 | |
---|
1799 | if ((flags & TRACE_PREP_OWN_BUFFER) == TRACE_PREP_OWN_BUFFER) |
---|
1800 | packet->buf_control = TRACE_CTRL_PACKET; |
---|
1801 | else |
---|
1802 | packet->buf_control = TRACE_CTRL_EXTERNAL; |
---|
1803 | |
---|
1804 | packet->buffer = buffer; |
---|
1805 | packet->header = buffer; |
---|
1806 | |
---|
1807 | /* Don't use pktmbuf_mtod will fail if the packet is a copy */ |
---|
1808 | packet->payload = (char *)buffer + dpdk_get_framing_length(packet); |
---|
1809 | packet->type = rt_type; |
---|
1810 | return 0; |
---|
1811 | } |
---|
1812 | |
---|
1813 | /** |
---|
1814 | * Given a packet size and a link speed, computes the |
---|
1815 | * time to transmit in nanoseconds. |
---|
1816 | * |
---|
1817 | * @param format_data The dpdk format data from which we get the link speed |
---|
1818 | * and if unset updates it in a thread safe manner |
---|
1819 | * @param pkt_size The size of the packet in bytes |
---|
1820 | * @return The wire time in nanoseconds |
---|
1821 | */ |
---|
1822 | static inline uint32_t calculate_wire_time(struct dpdk_format_data_t* format_data, uint32_t pkt_size) { |
---|
1823 | uint32_t wire_time; |
---|
1824 | /* 20 extra bytes of interframe gap and preamble */ |
---|
1825 | # if GET_MAC_CRC_CHECKSUM |
---|
1826 | wire_time = ((pkt_size + 20) * 8000); |
---|
1827 | # else |
---|
1828 | wire_time = ((pkt_size + 20 + ETHER_CRC_LEN) * 8000); |
---|
1829 | # endif |
---|
1830 | |
---|
1831 | /* Division is really slow and introduces a pipeline stall |
---|
1832 | * The compiler will optimise this into magical multiplication and shifting |
---|
1833 | * See http://ridiculousfish.com/blog/posts/labor-of-division-episode-i.html |
---|
1834 | */ |
---|
1835 | retry_calc_wiretime: |
---|
1836 | switch (format_data->link_speed) { |
---|
1837 | case ETH_LINK_SPEED_40G: |
---|
1838 | wire_time /= ETH_LINK_SPEED_40G; |
---|
1839 | break; |
---|
1840 | case ETH_LINK_SPEED_20G: |
---|
1841 | wire_time /= ETH_LINK_SPEED_20G; |
---|
1842 | break; |
---|
1843 | case ETH_LINK_SPEED_10G: |
---|
1844 | wire_time /= ETH_LINK_SPEED_10G; |
---|
1845 | break; |
---|
1846 | case ETH_LINK_SPEED_1000: |
---|
1847 | wire_time /= ETH_LINK_SPEED_1000; |
---|
1848 | break; |
---|
1849 | case 0: |
---|
1850 | { |
---|
1851 | /* Maybe the link was down originally, but now it should be up */ |
---|
1852 | struct rte_eth_link link = {0}; |
---|
1853 | rte_eth_link_get_nowait(format_data->port, &link); |
---|
1854 | if (link.link_status && link.link_speed) { |
---|
1855 | format_data->link_speed = link.link_speed; |
---|
1856 | #ifdef DEBUG |
---|
1857 | fprintf(stderr, "Link has come up updated speed=%d\n", (int) link.link_speed); |
---|
1858 | #endif |
---|
1859 | goto retry_calc_wiretime; |
---|
1860 | } |
---|
1861 | /* We don't know the link speed, make sure numbers are counting up */ |
---|
1862 | wire_time = 1; |
---|
1863 | break; |
---|
1864 | } |
---|
1865 | default: |
---|
1866 | wire_time /= format_data->link_speed; |
---|
1867 | } |
---|
1868 | return wire_time; |
---|
1869 | } |
---|
1870 | |
---|
1871 | /** |
---|
1872 | * Does any extra preperation to all captured packets |
---|
1873 | * This includes adding our extra header to it with the timestamp, |
---|
1874 | * and any snapping |
---|
1875 | * |
---|
1876 | * @param format_data The DPDK format data |
---|
1877 | * @param plc The DPDK per lcore format data |
---|
1878 | * @param pkts An array of size nb_pkts of DPDK packets |
---|
1879 | */ |
---|
1880 | static inline void dpdk_ready_pkts(libtrace_t *libtrace, |
---|
1881 | struct dpdk_per_stream_t *plc, |
---|
1882 | struct rte_mbuf **pkts, |
---|
1883 | size_t nb_pkts) { |
---|
1884 | struct dpdk_format_data_t *format_data = FORMAT(libtrace); |
---|
1885 | struct dpdk_addt_hdr *hdr; |
---|
1886 | size_t i; |
---|
1887 | uint64_t cur_sys_time_ns; |
---|
1888 | #if HAS_HW_TIMESTAMPS_82580 |
---|
1889 | struct hw_timestamp_82580 *hw_ts; |
---|
1890 | uint64_t estimated_wraps; |
---|
1891 | #else |
---|
1892 | |
---|
1893 | #endif |
---|
1894 | |
---|
1895 | #if USE_CLOCK_GETTIME |
---|
1896 | struct timespec cur_sys_time = {0}; |
---|
1897 | /* This looks terrible and I feel bad doing it. But it's OK |
---|
1898 | * on new kernels, because this is a fast vsyscall */ |
---|
1899 | clock_gettime(CLOCK_REALTIME, &cur_sys_time); |
---|
1900 | cur_sys_time_ns = TS_TO_NS(cur_sys_time); |
---|
1901 | #else |
---|
1902 | struct timeval cur_sys_time = {0}; |
---|
1903 | /* Also a fast vsyscall */ |
---|
1904 | gettimeofday(&cur_sys_time, NULL); |
---|
1905 | cur_sys_time_ns = TV_TO_NS(cur_sys_time); |
---|
1906 | #endif |
---|
1907 | |
---|
1908 | /* The system clock is not perfect so when running |
---|
1909 | * at linerate we could timestamp a packet in the past. |
---|
1910 | * To avoid this we munge the timestamp to appear 1ns |
---|
1911 | * after the previous packet. We should eventually catch up |
---|
1912 | * to system time since a 64byte packet on a 10G link takes 67ns. |
---|
1913 | * |
---|
1914 | * Note with parallel readers timestamping packets |
---|
1915 | * with duplicate stamps or out of order is unavoidable without |
---|
1916 | * hardware timestamping from the NIC. |
---|
1917 | */ |
---|
1918 | #if !HAS_HW_TIMESTAMPS_82580 |
---|
1919 | if (plc->ts_last_sys >= cur_sys_time_ns) { |
---|
1920 | cur_sys_time_ns = plc->ts_last_sys + 1; |
---|
1921 | } |
---|
1922 | #endif |
---|
1923 | |
---|
1924 | ct_assert(RTE_PKTMBUF_HEADROOM >= sizeof(struct dpdk_addt_hdr)); |
---|
1925 | for (i = 0 ; i < nb_pkts ; ++i) { |
---|
1926 | |
---|
1927 | /* We put our header straight after the dpdk header */ |
---|
1928 | hdr = (struct dpdk_addt_hdr *) (pkts[i] + 1); |
---|
1929 | memset(hdr, 0, sizeof(struct dpdk_addt_hdr)); |
---|
1930 | |
---|
1931 | #if GET_MAC_CRC_CHECKSUM |
---|
1932 | /* Add back in the CRC sum */ |
---|
1933 | rte_pktmbuf_pkt_len(pkt) += ETHER_CRC_LEN; |
---|
1934 | rte_pktmbuf_data_len(pkt) += ETHER_CRC_LEN; |
---|
1935 | hdr->flags |= INCLUDES_CHECKSUM; |
---|
1936 | #endif |
---|
1937 | |
---|
1938 | hdr->cap_len = rte_pktmbuf_pkt_len(pkts[i]); |
---|
1939 | |
---|
1940 | #if HAS_HW_TIMESTAMPS_82580 |
---|
1941 | /* The timestamp is sitting before our packet and is included in pkt_len */ |
---|
1942 | hdr->flags |= INCLUDES_HW_TIMESTAMP; |
---|
1943 | hdr->cap_len -= sizeof(struct hw_timestamp_82580); |
---|
1944 | hw_ts = (struct hw_timestamp_82580 *) MBUF_PKTDATA(pkts[i]); |
---|
1945 | |
---|
1946 | /* Taken from igb_ptp.c part of Intel Linux drivers (Good example code) |
---|
1947 | * |
---|
1948 | * +----------+---+ +--------------+ |
---|
1949 | * 82580 | 24 | 8 | | 32 | |
---|
1950 | * +----------+---+ +--------------+ |
---|
1951 | * reserved \______ 40 bits _____/ |
---|
1952 | * |
---|
1953 | * The 40 bit 82580 SYSTIM overflows every |
---|
1954 | * 2^40 * 10^-9 / 60 = 18.3 minutes. |
---|
1955 | * |
---|
1956 | * NOTE picture is in Big Endian order, in memory it's acutally in Little |
---|
1957 | * Endian (for the full 64 bits) i.e. picture is mirrored |
---|
1958 | */ |
---|
1959 | |
---|
1960 | /* Despite what the documentation says this is in Little |
---|
1961 | * Endian byteorder. Mask the reserved section out. |
---|
1962 | */ |
---|
1963 | hdr->timestamp = le64toh(hw_ts->timestamp) & |
---|
1964 | ~(((~0ull)>>TS_NBITS_82580)<<TS_NBITS_82580); |
---|
1965 | |
---|
1966 | if (unlikely(plc->ts_first_sys == 0)) { |
---|
1967 | plc->ts_first_sys = cur_sys_time_ns - hdr->timestamp; |
---|
1968 | plc->ts_last_sys = plc->ts_first_sys; |
---|
1969 | } |
---|
1970 | |
---|
1971 | /* This will have serious problems if packets aren't read quickly |
---|
1972 | * that is within a couple of seconds because our clock cycles every |
---|
1973 | * 18 seconds */ |
---|
1974 | estimated_wraps = (cur_sys_time_ns - plc->ts_last_sys) |
---|
1975 | / (1ull<<TS_NBITS_82580); |
---|
1976 | |
---|
1977 | /* Estimated_wraps gives the number of times the counter should have |
---|
1978 | * wrapped (however depending on value last time it could have wrapped |
---|
1979 | * twice more (if hw clock is close to its max value) or once less (allowing |
---|
1980 | * for a bit of variance between hw and sys clock). But if the clock |
---|
1981 | * shouldn't have wrapped once then don't allow it to go backwards in time */ |
---|
1982 | if (unlikely(estimated_wraps >= 2)) { |
---|
1983 | /* 2 or more wrap arounds add all but the very last wrap */ |
---|
1984 | plc->wrap_count += estimated_wraps - 1; |
---|
1985 | } |
---|
1986 | |
---|
1987 | /* Set the timestamp to the lowest possible value we're considering */ |
---|
1988 | hdr->timestamp += plc->ts_first_sys + |
---|
1989 | plc->wrap_count * (1ull<<TS_NBITS_82580); |
---|
1990 | |
---|
1991 | /* In most runs only the first if() will need evaluating - i.e our |
---|
1992 | * estimate is correct. */ |
---|
1993 | if (unlikely(!WITHIN_VARIANCE(cur_sys_time_ns, |
---|
1994 | hdr->timestamp, MAXSKEW_82580))) { |
---|
1995 | /* Failed to match estimated_wraps-1 (or estimated_wraps in ==0 case) */ |
---|
1996 | plc->wrap_count++; |
---|
1997 | hdr->timestamp += (1ull<<TS_NBITS_82580); |
---|
1998 | if (!WITHIN_VARIANCE(cur_sys_time_ns, |
---|
1999 | hdr->timestamp, MAXSKEW_82580)) { |
---|
2000 | /* Failed to match estimated_wraps */ |
---|
2001 | plc->wrap_count++; |
---|
2002 | hdr->timestamp += (1ull<<TS_NBITS_82580); |
---|
2003 | if (!WITHIN_VARIANCE(cur_sys_time_ns, |
---|
2004 | hdr->timestamp, MAXSKEW_82580)) { |
---|
2005 | if (estimated_wraps == 0) { |
---|
2006 | /* 0 case Failed to match estimated_wraps+2 */ |
---|
2007 | printf("WARNING - Hardware Timestamp failed to" |
---|
2008 | " match using systemtime!\n"); |
---|
2009 | hdr->timestamp = cur_sys_time_ns; |
---|
2010 | } else { |
---|
2011 | /* Failed to match estimated_wraps+1 */ |
---|
2012 | plc->wrap_count++; |
---|
2013 | hdr->timestamp += (1ull<<TS_NBITS_82580); |
---|
2014 | if (!WITHIN_VARIANCE(cur_sys_time_ns, |
---|
2015 | hdr->timestamp, MAXSKEW_82580)) { |
---|
2016 | /* Failed to match estimated_wraps+2 */ |
---|
2017 | printf("WARNING - Hardware Timestamp failed to" |
---|
2018 | " match using systemtime!!\n"); |
---|
2019 | } |
---|
2020 | } |
---|
2021 | } |
---|
2022 | } |
---|
2023 | } |
---|
2024 | #else |
---|
2025 | |
---|
2026 | hdr->timestamp = cur_sys_time_ns; |
---|
2027 | /* Offset the next packet by the wire time of previous */ |
---|
2028 | calculate_wire_time(format_data, hdr->cap_len); |
---|
2029 | |
---|
2030 | #endif |
---|
2031 | } |
---|
2032 | |
---|
2033 | plc->ts_last_sys = cur_sys_time_ns; |
---|
2034 | return; |
---|
2035 | } |
---|
2036 | |
---|
2037 | |
---|
2038 | static void dpdk_fin_packet(libtrace_packet_t *packet) |
---|
2039 | { |
---|
2040 | if ( packet->buf_control == TRACE_CTRL_EXTERNAL ) { |
---|
2041 | rte_pktmbuf_free(packet->buffer); |
---|
2042 | packet->buffer = NULL; |
---|
2043 | } |
---|
2044 | } |
---|
2045 | |
---|
2046 | /** Reads at least one packet or returns an error |
---|
2047 | */ |
---|
2048 | static inline int dpdk_read_packet_stream (libtrace_t *libtrace, |
---|
2049 | dpdk_per_stream_t *stream, |
---|
2050 | libtrace_message_queue_t *mesg, |
---|
2051 | struct rte_mbuf* pkts_burst[], |
---|
2052 | size_t nb_packets) { |
---|
2053 | size_t nb_rx; /* Number of rx packets we've recevied */ |
---|
2054 | while (1) { |
---|
2055 | /* Poll for a batch of packets */ |
---|
2056 | nb_rx = rte_eth_rx_burst(FORMAT(libtrace)->port, |
---|
2057 | stream->queue_id, pkts_burst, nb_packets); |
---|
2058 | if (nb_rx > 0) { |
---|
2059 | /* Got some packets - otherwise we keep spining */ |
---|
2060 | dpdk_ready_pkts(libtrace, stream, pkts_burst, nb_rx); |
---|
2061 | //fprintf(stderr, "Doing P READ PACKET port=%d q=%d\n", (int) FORMAT(libtrace)->port, (int) get_thread_table_num(libtrace)); |
---|
2062 | return nb_rx; |
---|
2063 | } |
---|
2064 | /* Check the message queue this could be less than 0 */ |
---|
2065 | if (mesg && libtrace_message_queue_count(mesg) > 0) |
---|
2066 | return READ_MESSAGE; |
---|
2067 | if (libtrace_halt) |
---|
2068 | return READ_EOF; |
---|
2069 | /* Wait a while, polling on memory degrades performance |
---|
2070 | * This relieves the pressure on memory allowing the NIC to DMA */ |
---|
2071 | rte_delay_us(10); |
---|
2072 | } |
---|
2073 | |
---|
2074 | /* We'll never get here - but if we did it would be bad */ |
---|
2075 | return READ_ERROR; |
---|
2076 | } |
---|
2077 | |
---|
2078 | static int dpdk_pread_packets (libtrace_t *libtrace, |
---|
2079 | libtrace_thread_t *t, |
---|
2080 | libtrace_packet_t **packets, |
---|
2081 | size_t nb_packets) { |
---|
2082 | int nb_rx; /* Number of rx packets we've recevied */ |
---|
2083 | struct rte_mbuf* pkts_burst[nb_packets]; /* Array of pointer(s) */ |
---|
2084 | int i; |
---|
2085 | dpdk_per_stream_t *stream = t->format_data; |
---|
2086 | |
---|
2087 | nb_rx = dpdk_read_packet_stream (libtrace, stream, &t->messages, |
---|
2088 | pkts_burst, nb_packets); |
---|
2089 | |
---|
2090 | if (nb_rx > 0) { |
---|
2091 | for (i = 0; i < nb_rx; ++i) { |
---|
2092 | if (packets[i]->buffer != NULL) { |
---|
2093 | /* The packet should always be finished */ |
---|
2094 | assert(packets[i]->buf_control == TRACE_CTRL_PACKET); |
---|
2095 | free(packets[i]->buffer); |
---|
2096 | } |
---|
2097 | packets[i]->buf_control = TRACE_CTRL_EXTERNAL; |
---|
2098 | packets[i]->type = TRACE_RT_DATA_DPDK; |
---|
2099 | packets[i]->buffer = pkts_burst[i]; |
---|
2100 | packets[i]->trace = libtrace; |
---|
2101 | packets[i]->error = 1; |
---|
2102 | dpdk_prepare_packet(libtrace, packets[i], packets[i]->buffer, packets[i]->type, 0); |
---|
2103 | } |
---|
2104 | } |
---|
2105 | |
---|
2106 | return nb_rx; |
---|
2107 | } |
---|
2108 | |
---|
2109 | static int dpdk_read_packet (libtrace_t *libtrace, libtrace_packet_t *packet) { |
---|
2110 | int nb_rx; /* Number of rx packets we've received */ |
---|
2111 | dpdk_per_stream_t *stream = FORMAT_DATA_FIRST(libtrace); |
---|
2112 | |
---|
2113 | /* Free the last packet buffer */ |
---|
2114 | if (packet->buffer != NULL) { |
---|
2115 | /* The packet should always be finished */ |
---|
2116 | assert(packet->buf_control == TRACE_CTRL_PACKET); |
---|
2117 | free(packet->buffer); |
---|
2118 | packet->buffer = NULL; |
---|
2119 | } |
---|
2120 | |
---|
2121 | packet->buf_control = TRACE_CTRL_EXTERNAL; |
---|
2122 | packet->type = TRACE_RT_DATA_DPDK; |
---|
2123 | |
---|
2124 | /* Check if we already have some packets buffered */ |
---|
2125 | if (FORMAT(libtrace)->burst_size != FORMAT(libtrace)->burst_offset) { |
---|
2126 | packet->buffer = FORMAT(libtrace)->burst_pkts[FORMAT(libtrace)->burst_offset++]; |
---|
2127 | dpdk_prepare_packet(libtrace, packet, packet->buffer, packet->type, 0); |
---|
2128 | return 1; // TODO should be bytes read, which essentially useless anyway |
---|
2129 | } |
---|
2130 | |
---|
2131 | nb_rx = dpdk_read_packet_stream (libtrace, stream, NULL, |
---|
2132 | FORMAT(libtrace)->burst_pkts, BURST_SIZE); |
---|
2133 | |
---|
2134 | if (nb_rx > 0) { |
---|
2135 | FORMAT(libtrace)->burst_size = nb_rx; |
---|
2136 | FORMAT(libtrace)->burst_offset = 1; |
---|
2137 | packet->buffer = FORMAT(libtrace)->burst_pkts[0]; |
---|
2138 | dpdk_prepare_packet(libtrace, packet, packet->buffer, packet->type, 0); |
---|
2139 | return 1; |
---|
2140 | } |
---|
2141 | return nb_rx; |
---|
2142 | } |
---|
2143 | |
---|
2144 | static struct timeval dpdk_get_timeval (const libtrace_packet_t *packet) { |
---|
2145 | struct timeval tv; |
---|
2146 | struct dpdk_addt_hdr * hdr = get_addt_hdr(packet); |
---|
2147 | |
---|
2148 | tv.tv_sec = hdr->timestamp / (uint64_t) 1000000000; |
---|
2149 | tv.tv_usec = (hdr->timestamp % (uint64_t) 1000000000) / 1000; |
---|
2150 | return tv; |
---|
2151 | } |
---|
2152 | |
---|
2153 | static struct timespec dpdk_get_timespec (const libtrace_packet_t *packet) { |
---|
2154 | struct timespec ts; |
---|
2155 | struct dpdk_addt_hdr * hdr = get_addt_hdr(packet); |
---|
2156 | |
---|
2157 | ts.tv_sec = hdr->timestamp / (uint64_t) 1000000000; |
---|
2158 | ts.tv_nsec = hdr->timestamp % (uint64_t) 1000000000; |
---|
2159 | return ts; |
---|
2160 | } |
---|
2161 | |
---|
2162 | static libtrace_linktype_t dpdk_get_link_type (const libtrace_packet_t *packet UNUSED) { |
---|
2163 | return TRACE_TYPE_ETH; /* Always ethernet until proven otherwise */ |
---|
2164 | } |
---|
2165 | |
---|
2166 | static libtrace_direction_t dpdk_get_direction (const libtrace_packet_t *packet) { |
---|
2167 | struct dpdk_addt_hdr * hdr = get_addt_hdr(packet); |
---|
2168 | return (libtrace_direction_t) hdr->direction; |
---|
2169 | } |
---|
2170 | |
---|
2171 | static libtrace_direction_t dpdk_set_direction(libtrace_packet_t *packet, libtrace_direction_t direction) { |
---|
2172 | struct dpdk_addt_hdr * hdr = get_addt_hdr(packet); |
---|
2173 | hdr->direction = (uint8_t) direction; |
---|
2174 | return (libtrace_direction_t) hdr->direction; |
---|
2175 | } |
---|
2176 | |
---|
2177 | static void dpdk_get_stats(libtrace_t *trace, libtrace_stat_t *stats) { |
---|
2178 | struct rte_eth_stats dev_stats = {0}; |
---|
2179 | |
---|
2180 | if (trace->format_data == NULL || FORMAT(trace)->port == 0xFF) |
---|
2181 | return; |
---|
2182 | |
---|
2183 | /* Grab the current stats */ |
---|
2184 | rte_eth_stats_get(FORMAT(trace)->port, &dev_stats); |
---|
2185 | |
---|
2186 | stats->captured_valid = true; |
---|
2187 | stats->captured = dev_stats.ipackets; |
---|
2188 | |
---|
2189 | /* Not that we support adding filters but if we did this |
---|
2190 | * would work */ |
---|
2191 | stats->filtered += dev_stats.fdirmiss; |
---|
2192 | |
---|
2193 | stats->dropped_valid = true; |
---|
2194 | stats->dropped = dev_stats.imissed; |
---|
2195 | |
---|
2196 | /* DPDK errors includes drops */ |
---|
2197 | stats->errors_valid = true; |
---|
2198 | stats->errors = dev_stats.ierrors - dev_stats.imissed; |
---|
2199 | |
---|
2200 | stats->received_valid = true; |
---|
2201 | stats->received = dev_stats.ipackets + dev_stats.imissed; |
---|
2202 | |
---|
2203 | } |
---|
2204 | |
---|
2205 | /* Attempts to read a packet in a non-blocking fashion. If one is not |
---|
2206 | * available a SLEEP event is returned. We do not have the ability to |
---|
2207 | * create a select()able file descriptor in DPDK. |
---|
2208 | */ |
---|
2209 | static libtrace_eventobj_t dpdk_trace_event(libtrace_t *trace, |
---|
2210 | libtrace_packet_t *packet) { |
---|
2211 | libtrace_eventobj_t event = {0,0,0.0,0}; |
---|
2212 | int nb_rx; /* Number of receive packets we've read */ |
---|
2213 | struct rte_mbuf* pkts_burst[1]; /* Array of 1 pointer(s) to rx buffers */ |
---|
2214 | |
---|
2215 | do { |
---|
2216 | |
---|
2217 | /* See if we already have a packet waiting */ |
---|
2218 | nb_rx = rte_eth_rx_burst(FORMAT(trace)->port, |
---|
2219 | FORMAT_DATA_FIRST(trace)->queue_id, |
---|
2220 | pkts_burst, 1); |
---|
2221 | |
---|
2222 | if (nb_rx > 0) { |
---|
2223 | /* Free the last packet buffer */ |
---|
2224 | if (packet->buffer != NULL) { |
---|
2225 | /* The packet should always be finished */ |
---|
2226 | assert(packet->buf_control == TRACE_CTRL_PACKET); |
---|
2227 | free(packet->buffer); |
---|
2228 | packet->buffer = NULL; |
---|
2229 | } |
---|
2230 | |
---|
2231 | packet->buf_control = TRACE_CTRL_EXTERNAL; |
---|
2232 | packet->type = TRACE_RT_DATA_DPDK; |
---|
2233 | event.type = TRACE_EVENT_PACKET; |
---|
2234 | dpdk_ready_pkts(trace, FORMAT_DATA_FIRST(trace), pkts_burst, 1); |
---|
2235 | packet->buffer = FORMAT(trace)->burst_pkts[0]; |
---|
2236 | dpdk_prepare_packet(trace, packet, packet->buffer, packet->type, 0); |
---|
2237 | event.size = 1; // TODO should be bytes read, which essentially useless anyway |
---|
2238 | |
---|
2239 | /* XXX - Check this passes the filter trace_read_packet normally |
---|
2240 | * does this for us but this wont */ |
---|
2241 | if (trace->filter) { |
---|
2242 | if (!trace_apply_filter(trace->filter, packet)) { |
---|
2243 | /* Failed the filter so we loop for another packet */ |
---|
2244 | trace->filtered_packets ++; |
---|
2245 | continue; |
---|
2246 | } |
---|
2247 | } |
---|
2248 | trace->accepted_packets ++; |
---|
2249 | } else { |
---|
2250 | /* We only want to sleep for a very short time - we are non-blocking */ |
---|
2251 | event.type = TRACE_EVENT_SLEEP; |
---|
2252 | event.seconds = 0.0001; |
---|
2253 | event.size = 0; |
---|
2254 | } |
---|
2255 | |
---|
2256 | /* If we get here we have our event */ |
---|
2257 | break; |
---|
2258 | } while (1); |
---|
2259 | |
---|
2260 | return event; |
---|
2261 | } |
---|
2262 | |
---|
2263 | static void dpdk_help(void) { |
---|
2264 | printf("dpdk format module: $Revision: 1752 $\n"); |
---|
2265 | printf("Supported input URIs:\n"); |
---|
2266 | printf("\tdpdk:<domain:bus:devid.func>-<coreid>\n"); |
---|
2267 | printf("\tThe -<coreid> is optional \n"); |
---|
2268 | printf("\t e.g. dpdk:0000:01:00.1\n"); |
---|
2269 | printf("\t e.g. dpdk:0000:01:00.1-2 (Use the second CPU core)\n\n"); |
---|
2270 | printf("\t By default the last CPU core is used if not otherwise specified.\n"); |
---|
2271 | printf("\t Only a single libtrace instance of dpdk can use the same CPU core.\n"); |
---|
2272 | printf("\t Support for multiple simultaneous instances of dpdk format is currently limited.\n"); |
---|
2273 | printf("\n"); |
---|
2274 | printf("Supported output URIs:\n"); |
---|
2275 | printf("\tSame format as the input URI.\n"); |
---|
2276 | printf("\t e.g. dpdk:0000:01:00.1\n"); |
---|
2277 | printf("\t e.g. dpdk:0000:01:00.1-2 (Use the second CPU core)\n"); |
---|
2278 | printf("\n"); |
---|
2279 | } |
---|
2280 | |
---|
2281 | static struct libtrace_format_t dpdk = { |
---|
2282 | "dpdk", |
---|
2283 | "$Id$", |
---|
2284 | TRACE_FORMAT_DPDK, |
---|
2285 | NULL, /* probe filename */ |
---|
2286 | NULL, /* probe magic */ |
---|
2287 | dpdk_init_input, /* init_input */ |
---|
2288 | dpdk_config_input, /* config_input */ |
---|
2289 | dpdk_start_input, /* start_input */ |
---|
2290 | dpdk_pause_input, /* pause_input */ |
---|
2291 | dpdk_init_output, /* init_output */ |
---|
2292 | NULL, /* config_output */ |
---|
2293 | dpdk_start_output, /* start_ouput */ |
---|
2294 | dpdk_fin_input, /* fin_input */ |
---|
2295 | dpdk_fin_output, /* fin_output */ |
---|
2296 | dpdk_read_packet, /* read_packet */ |
---|
2297 | dpdk_prepare_packet, /* prepare_packet */ |
---|
2298 | dpdk_fin_packet, /* fin_packet */ |
---|
2299 | dpdk_write_packet, /* write_packet */ |
---|
2300 | dpdk_get_link_type, /* get_link_type */ |
---|
2301 | dpdk_get_direction, /* get_direction */ |
---|
2302 | dpdk_set_direction, /* set_direction */ |
---|
2303 | NULL, /* get_erf_timestamp */ |
---|
2304 | dpdk_get_timeval, /* get_timeval */ |
---|
2305 | dpdk_get_timespec, /* get_timespec */ |
---|
2306 | NULL, /* get_seconds */ |
---|
2307 | NULL, /* seek_erf */ |
---|
2308 | NULL, /* seek_timeval */ |
---|
2309 | NULL, /* seek_seconds */ |
---|
2310 | dpdk_get_capture_length, /* get_capture_length */ |
---|
2311 | dpdk_get_wire_length, /* get_wire_length */ |
---|
2312 | dpdk_get_framing_length, /* get_framing_length */ |
---|
2313 | dpdk_set_capture_length, /* set_capture_length */ |
---|
2314 | NULL, /* get_received_packets */ |
---|
2315 | NULL, /* get_filtered_packets */ |
---|
2316 | NULL, /* get_dropped_packets */ |
---|
2317 | dpdk_get_stats, /* get_statistics */ |
---|
2318 | NULL, /* get_fd */ |
---|
2319 | dpdk_trace_event, /* trace_event */ |
---|
2320 | dpdk_help, /* help */ |
---|
2321 | NULL, /* next pointer */ |
---|
2322 | {true, 8}, /* Live, NICs typically have 8 threads */ |
---|
2323 | dpdk_pstart_input, /* pstart_input */ |
---|
2324 | dpdk_pread_packets, /* pread_packets */ |
---|
2325 | dpdk_pause_input, /* ppause */ |
---|
2326 | dpdk_fin_input, /* p_fin */ |
---|
2327 | dpdk_pregister_thread, /* pregister_thread */ |
---|
2328 | dpdk_punregister_thread, /* punregister_thread */ |
---|
2329 | NULL /* get thread stats */ |
---|
2330 | }; |
---|
2331 | |
---|
2332 | void dpdk_constructor(void) { |
---|
2333 | register_format(&dpdk); |
---|
2334 | } |
---|