Changeset 5d8280a for lib

Timestamp:

11/14/17 11:15:06 (3 years ago)

Author:

Shane Alcock <salcock@…>

Branches:

cachetimestamps, develop, dpdk-ndag, etsilive, master, ndag_format, rc-4.0.2, rc-4.0.3, rc-4.0.4, ringdecrementfix, ringperformance

Children:

eb70703

Parents:

639d952

Message:

Increased buffer number and batch size for ndag receiving.

Only call recvmmsg if there are a decent number of buffers
available to fill -- the overhead is not worth it if we've only
got one or two buffers available and, in that case, we must have
plenty of buffered packets ready for reading anyway.

File:

• lib/format_ndag.c (modified) (3 diffs)

lib/format_ndag.c

@@ -26 +26 @@
 #define ENCAP_BUFSIZE (10000)
 #define CTRL_BUF_SIZE (10000)
-#define ENCAP_BUFFERS (100)
-
-#define RECV_BATCH_SIZE (20)
+#define ENCAP_BUFFERS (1000)
+
+#define RECV_BATCH_SIZE (50)
 
 #define FORMAT_DATA ((ndag_format_data_t *)libtrace->format_data)
@@ -598 +598 @@
                  * move on. */
                 ssock->savedsize[nr] = 0;
-                nr = (nr + 1) % ENCAP_BUFFERS;
+                nr ++;
+                if (nr == ENCAP_BUFFERS) {
+                        nr = 0;
+                }
                 ssock->nextread = ssock->saved[nr] + sizeof(ndag_common_t) +
                                 sizeof(ndag_encap_t);
@@ -874 +877 @@
                 /* All buffers were full, so something must be
                  * available. */
+                return 1;
+        }
+
+        if (avail < RECV_BATCH_SIZE / 2) {
                 return 1;
         }