commit 81a13db67f6e3cca2a974e4c32d8e9db940645dc
author Florin Coras <fcoras@cisco.com> Fri Mar 16 08:48:31 2018 -0700
committer Dave Barach <openvpp@barachs.net> Fri Mar 23 14:30:06 2018 +0000
tree 5ef6438d2298ad1e5dec13f8d3f842b182c68068
parent 0bee9ce4af04322c56f7511f24bda4874e78a4b4

tcp/session: sprinkle prefetches

Change-Id: Idef3c665580c13d72e99f43d16b8b13cc6ab746f
Signed-off-by: Florin Coras <fcoras@cisco.com>

src/vnet/tcp/tcp_input.c

diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 86bce48..07f1838 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -1713,6 +1713,14 @@
 	  tcp_connection_t *tc0;
 	  u32 next0 = tcp_next_drop (is_ip4), error0 = TCP_ERROR_ENQUEUED;
 
+	  if (n_left_from > 1)
+	    {
+	      vlib_buffer_t *pb;
+	      pb = vlib_get_buffer (vm, from[1]);
+	      vlib_prefetch_buffer_header (pb, LOAD);
+	      CLIB_PREFETCH (pb->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+	    }
+
 	  bi0 = from[0];
 	  to_next[0] = bi0;
 	  from += 1;