tcp/session: sprinkle prefetches

[vpp.git] / src / vnet / tcp / tcp_output.c

diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index bbcbc91..2b5a5cd 100644 (file)
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -1771,6 +1771,14 @@ tcp46_output_inline (vlib_main_t * vm,
          tcp_header_t *th0 = 0;
          u32 error0 = TCP_ERROR_PKTS_SENT, next0 = TCP_OUTPUT_NEXT_IP_LOOKUP;
 
+         if (n_left_from > 1)
+           {
+             vlib_buffer_t *pb;
+             pb = vlib_get_buffer (vm, from[1]);
+             vlib_prefetch_buffer_header (pb, STORE);
+             CLIB_PREFETCH (pb->data, 2 * CLIB_CACHE_LINE_BYTES, STORE);
+           }
+
          bi0 = from[0];
          to_next[0] = bi0;
          from += 1;