From: David S. Miller Date: Sat, 4 Jan 2014 00:41:39 +0000 (-0500) Subject: Merge branch 'tunnel_dst_caching' X-Git-Tag: v3.14-rc1~94^2~308 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=e9bf3b075384b3b400ab4689a2014860704164b7;p=linux.git Merge branch 'tunnel_dst_caching' Tom Herbert says: ==================== ipv4: Cache dst in tunnels Version 3 of caching routes in tunnels. Addressed some comments from Eric in this series. There are two patches (variants) in the series: 1) One dst cached for each tunnel. 2) Percpu dst cache per tunnel to avoid false sharing Testing with GRE tunnels on a 32 CPU host with bnx2x (RSS support for GRE) shows a modest improvement in CPU utilization with these patches running 200 TCP_RR netperf clients. Without patches 71.22% CPU utilization 138/180/244 90/95/99% latencies 1.30465e+06 CPU/tps 18318 CPU/tps With patches 69.84% 142/186/249 90/95/99% latencies 1.30827e+06 18732 CPU/tps ==================== Signed-off-by: David S. Miller --- e9bf3b075384b3b400ab4689a2014860704164b7