From: Rik van Riel <riel@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>,
Matt Fleming <matt@codeblueprint.co.uk>
Cc: Eric Farman <farman@linux.vnet.ibm.com>,
????????? <jinpuwang@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
jhladky@redhat.com, Ingo Molnar <mingo@redhat.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
"KVM-ML (kvm@vger.kernel.org)" <kvm@vger.kernel.org>,
vcaputo@pengaru.com, Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Subject: Re: sysbench throughput degradation in 4.13+
Date: Tue, 03 Oct 2017 12:02:41 -0400 [thread overview]
Message-ID: <1507046561.10046.22.camel@redhat.com> (raw)
In-Reply-To: <20171003083932.3qa7jw2spmi5n5pg@hirez.programming.kicks-ass.net>
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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.
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All rights reversed
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next prev parent reply other threads:[~2017-10-03 16:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-12 14:14 sysbench throughput degradation in 4.13+ Eric Farman
2017-09-13 8:24 ` 王金浦
2017-09-22 15:03 ` Eric Farman
2017-09-22 15:53 ` Peter Zijlstra
2017-09-22 16:12 ` Eric Farman
2017-09-27 9:35 ` Peter Zijlstra
2017-09-27 16:27 ` Eric Farman
2017-09-28 9:08 ` Christian Borntraeger
2017-09-27 17:58 ` Rik van Riel
2017-09-28 11:04 ` Eric Farman
2017-09-28 12:36 ` Peter Zijlstra
2017-09-28 12:37 ` Peter Zijlstra
2017-10-02 22:53 ` Matt Fleming
2017-10-03 8:39 ` Peter Zijlstra
2017-10-03 16:02 ` Rik van Riel [this message]
2017-10-04 16:18 ` Peter Zijlstra
2017-10-04 18:02 ` Rik van Riel
2017-10-06 10:36 ` Matt Fleming
2017-10-10 14:51 ` Matt Fleming
2017-10-10 15:16 ` Peter Zijlstra
2017-10-10 17:26 ` Ingo Molnar
2017-10-10 17:40 ` Christian Borntraeger
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