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.
@@ -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);
}
