On Tue, 2017-10-03 at 10:39 +0200, Peter Zijlstra wrote: > On Mon, Oct 02, 2017 at 11:53:12PM +0100, Matt Fleming wrote: > > On Wed, 27 Sep, at 01:58:20PM, Rik van Riel wrote: > > > > > > I like the simplicity of your approach! I hope it does not break > > > stuff like netperf... > > > > > > I have been working on the patch below, which is much less > > > optimistic > > > about when to do an affine wakeup than before. > > > > Running netperf for this patch and Peter's patch shows that Peter's > > comes out on top, with scores pretty close to v4.12 in most places > > on > > my 2-NUMA node 48-CPU Xeon box. > > > > I haven't dug any further into why v4.13-peterz+ is worse than > > v4.12, > > but I will next week. > > So I was waiting for Rik, who promised to run a bunch of NUMA > workloads > over the weekend. > > The trivial thing regresses a wee bit on the overloaded case, I've > not > yet tried to fix it. In Jirka's tests, your simple patch also came out on top. -- All rights reversed
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