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(parent: f7c1a70) | patch
Honor vnet_rewrite_data_t data_bytes == 0 20/18120/2
authorDave Barach <dave@barachs.net>
Thu, 7 Mar 2019 15:06:52 +0000 (10:06 -0500)
committerDamjan Marion <dmarion@me.com>
Thu, 7 Mar 2019 19:39:28 +0000 (19:39 +0000)
commit974931f162820bd4ba41a43cae9578171cf0e3d1
tree8025ada44b91bb3c2f863bc98e80894794e1fd3btree | snapshot
parentf7c1a70ba502c83d6e5813344c01edbdfbff6738commit | diff
Honor vnet_rewrite_data_t data_bytes == 0

Avoid the cache miss consequences of spraying [functionally harmless]
junk into un-prefetched rewrite space. As things stand, several tunnel
encap rewrites set rewrite data_bytes = 0, and take a performance hit
due to unwanted speculative copying.

Should be performance-neutral in speed-path cases, which won't execute
the added check.

Change-Id: Id83c0325e58c0f31631b4bae5a06457dfc7ed567
Signed-off-by: Dave Barach <dave@barachs.net>
src/vnet/adj/rewrite.h diff | blob | history
Vector Packet Processing