From: Ingo Molnar <mingo@kernel.org>
To: Mike Galbraith <bitbucket@online.de>
Cc: Rik van Riel <riel@redhat.com>,
linux-kernel@vger.kernel.org, aquini@redhat.com,
walken@google.com, eric.dumazet@gmail.com, lwoodman@redhat.com,
knoel@redhat.com, chegu_vinod@hp.com,
raghavendra.kt@linux.vnet.ibm.com, mingo@redhat.com
Subject: Re: [PATCH -v4 0/5] x86,smp: make ticket spinlock proportional backoff w/ auto tuning
Date: Sat, 26 Jan 2013 13:05:09 +0100 [thread overview]
Message-ID: <20130126120509.GD13445@gmail.com> (raw)
In-Reply-To: <1359184867.5835.85.camel@marge.simpson.net>
* Mike Galbraith <bitbucket@online.de> wrote:
> On Fri, 2013-01-25 at 14:05 -0500, Rik van Riel wrote:
>
> > The performance issue observed with AIM7 is still a mystery.
>
> Hm. AIM7 mystery _may_ be the same crud I see on a 4 node 40
> core box. Stock scheduler knobs are too preempt happy, produce
> unstable results. I twiddle them as below to stabilize
> results.
>
> I'm testing a load balancing series from Alex Shi with AIM7
> and whatnot, added your series on top of it and retested.
> What I see is improvement.
Since we want both series that's good news, agreed?
Thanks,
Ingo
next prev parent reply other threads:[~2013-01-26 12:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-25 19:05 [PATCH -v4 0/5] x86,smp: make ticket spinlock proportional backoff w/ auto tuning Rik van Riel
2013-01-25 19:16 ` [PATCH -v4 1/5] x86,smp: move waiting on contended ticket lock out of line Rik van Riel
2013-01-25 19:17 ` [PATCH -v4 2/5] x86,smp: proportional backoff for ticket spinlocks Rik van Riel
2013-01-25 19:17 ` [PATCH -v4 3/5] x86,smp: auto tune spinlock backoff delay factor Rik van Riel
2013-01-26 12:03 ` Ingo Molnar
2013-01-25 19:18 ` [PATCH -v4 4/5] x86,smp: keep spinlock delay values per hashed spinlock address Rik van Riel
2013-01-27 13:04 ` Michel Lespinasse
2013-02-06 20:10 ` Rik van Riel
2013-02-09 23:50 ` Michel Lespinasse
2013-01-25 19:19 ` [PATCH -v4 5/5] x86,smp: limit spinlock delay on virtual machines Rik van Riel
2013-01-26 12:00 ` Ingo Molnar
2013-01-26 12:47 ` Borislav Petkov
2013-02-04 13:50 ` Rik van Riel
2013-02-04 14:02 ` Borislav Petkov
2013-02-06 17:05 ` Rik van Riel
2013-01-28 18:18 ` Stefano Stabellini
2013-01-28 18:18 ` Stefano Stabellini
2013-01-25 19:20 ` [DEBUG PATCH -v4 6/5] x86,smp: add debugging code to track spinlock delay value Rik van Riel
2013-01-26 7:21 ` [PATCH -v4 0/5] x86,smp: make ticket spinlock proportional backoff w/ auto tuning Mike Galbraith
2013-01-26 12:05 ` Ingo Molnar [this message]
2013-01-26 13:10 ` Mike Galbraith
2013-01-28 6:49 ` Raghavendra K T
2013-02-03 15:28 ` Chegu Vinod
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