From 5a5a86987b1b5bd792e9615c3f26471abd4babb4 Mon Sep 17 00:00:00 2001 From: Simon Zhang Date: Mon, 26 Nov 2018 17:15:24 +0800 Subject: [PATCH] Remove useless prefetch in ip4-rewrite node Prefetching first 2 packets' header is useless cause of the prefetching action is not done before using the packets. There's no performance drop in Xeon platform and slightly performance gain in Atom platform after rmoving the prefetch. Change-Id: Ib4b074af20d7cd5053aecc7147b162141aec31f5 Signed-off-by: Simon Zhang --- src/vnet/ip/ip4_forward.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c index 9963f6b1e26..1911f088008 100644 --- a/src/vnet/ip/ip4_forward.c +++ b/src/vnet/ip/ip4_forward.c @@ -2197,7 +2197,7 @@ ip4_rewrite_inline (vlib_main_t * vm, if (n_left_from >= 6) { int i; - for (i = 0; i < 6; i++) + for (i = 2; i < 6; i++) vlib_prefetch_buffer_header (bufs[i], LOAD); } -- 2.16.6