From: Thadeu Lima de Souza Cascardo <>
Date: Thu, 15 Sep 2016 19:11:53 -0300

> Instead of using flow stats per NUMA node, use it per CPU. When using
> megaflows, the stats lock can be a bottleneck in scalability.
> On a E5-2690 12-core system, usual throughput went from ~4Mpps to
> ~15Mpps when forwarding between two 40GbE ports with a single flow
> configured on the datapath.
> This has been tested on a system with possible CPUs 0-7,16-23. After
> module removal, there were no corruption on the slab cache.
> Signed-off-by: Thadeu Lima de Souza Cascardo <>

Also applied to net-next, thanks.

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