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(parent: 2130284) | patch
vxlan: prefetch extra one cacheline holding external header 88/15688/2
authorZhiyong Yang <[email protected]>
Mon, 5 Nov 2018 08:45:25 +0000 (03:45 -0500)
committerJohn Lo <[email protected]>
Mon, 5 Nov 2018 21:02:38 +0000 (21:02 +0000)
commitb0073e276d9e12f02f8f9874fd09ae532a0baa47
treef2db5ddcf53e9bc48421a6ff82cbee0fcbe75f2dtree | snapshot
parent2130284302788759c7b2644efb801b84411e342ecommit | diff
vxlan: prefetch extra one cacheline holding external header

For vxlan_encap, code will touch memory area before the field "data"
in struct vlib_buffer_t, however so far it is not prefetched in cache
yet for this graph node.
After applying the patch, 2~3 cycles per pkt for vxlan4_encap can be
saved on Haswell. It will bring a lot of benefits on DVN platform too.

Change-Id: I26d8c57fb3d2415726be5367117d73eb715e35ad
Signed-off-by: Zhiyong Yang <[email protected]>
src/vnet/vxlan/encap.c diff | blob | history
Vector Packet Processing