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Date: Sat, 17 Sep 2016 19:07:30 -0700 From: pravin shelar <pshelar@....org> To: Thadeu Lima de Souza Cascardo <cascardo@...hat.com> Cc: Linux Kernel Network Developers <netdev@...r.kernel.org>, ovs dev <dev@...nvswitch.org>, David Miller <davem@...emloft.net>, Eric Dumazet <eric.dumazet@...il.com> Subject: Re: [PATCH v2 2/2] openvswitch: use percpu flow stats On Thu, Sep 15, 2016 at 3:11 PM, Thadeu Lima de Souza Cascardo <cascardo@...hat.com> wrote: > 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 <cascardo@...hat.com> > Cc: pravin shelar <pshelar@....org> Looks good. Acked-by: Pravin B Shelar <pshelar@....org>
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