From: Ingo Molnar <mingo@kernel.org>
To: Neil Horman <nhorman@tuxdriver.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
linux-kernel@vger.kernel.org, sebastien.dugue@bull.net,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's
Date: Tue, 29 Oct 2013 14:11:49 +0100 [thread overview]
Message-ID: <20131029131149.GB20408@gmail.com> (raw)
In-Reply-To: <20131029130712.GA25078@neilslaptop.think-freely.org>
* Neil Horman <nhorman@tuxdriver.com> wrote:
> I'm sure it worked properly on my system here, I specificially
> checked it, but I'll gladly run it again. You have to give me an
> hour as I have a meeting to run to, but I'll have results shortly.
So what I tried to react to was this observation of yours:
> > > Heres my data for running the same test with taskset
> > > restricting execution to only cpu0. I'm not quite sure whats
> > > going on here, but doing so resulted in a 10x slowdown of the
> > > runtime of each iteration which I can't explain. [...]
A 10x slowdown would be consistent with not running your testcase
but 'perf bench sched messaging' by accident, or so.
But I was really just guessing wildly here.
Thanks,
Ingo
next prev parent reply other threads:[~2013-10-29 13:11 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1381510298-20572-1-git-send-email-nhorman@tuxdriver.com>
[not found] ` <20131012172124.GA18241@gmail.com>
[not found] ` <20131014202854.GH26880@hmsreliant.think-freely.org>
[not found] ` <1381785560.2045.11.camel@edumazet-glaptop.roam.corp.google.com>
[not found] ` <1381789127.2045.22.camel@edumazet-glaptop.roam.corp.google.com>
[not found] ` <20131017003421.GA31470@hmsreliant.think-freely.org>
2013-10-17 8:41 ` [PATCH] x86: Run checksumming in parallel accross multiple alu's Ingo Molnar
2013-10-17 18:19 ` H. Peter Anvin
2013-10-17 18:48 ` Eric Dumazet
2013-10-18 6:43 ` Ingo Molnar
2013-10-28 16:01 ` Neil Horman
2013-10-28 16:20 ` Ingo Molnar
2013-10-28 17:49 ` Neil Horman
2013-10-28 16:24 ` Ingo Molnar
2013-10-28 16:49 ` David Ahern
2013-10-28 17:46 ` Neil Horman
2013-10-28 18:29 ` Neil Horman
2013-10-29 8:25 ` Ingo Molnar
2013-10-29 11:20 ` Neil Horman
2013-10-29 11:30 ` Ingo Molnar
2013-10-29 11:49 ` Neil Horman
2013-10-29 12:52 ` Ingo Molnar
2013-10-29 13:07 ` Neil Horman
2013-10-29 13:11 ` Ingo Molnar [this message]
2013-10-29 13:20 ` Neil Horman
2013-10-29 14:17 ` Neil Horman
2013-10-29 14:27 ` Ingo Molnar
2013-10-29 20:26 ` Neil Horman
2013-10-31 10:22 ` Ingo Molnar
2013-10-31 14:33 ` Neil Horman
2013-11-01 9:13 ` Ingo Molnar
2013-11-01 14:06 ` Neil Horman
2013-10-29 14:12 ` David Ahern
[not found] ` <1383751399-10298-1-git-send-email-nhorman@tuxdriver.com>
[not found] ` <1383751399-10298-3-git-send-email-nhorman@tuxdriver.com>
[not found] ` <87iow58eqf.fsf@tassilo.jf.intel.com>
2013-11-07 21:23 ` [PATCH v2 2/2] x86: add prefetching to do_csum Neil Horman
2013-10-30 5:25 [PATCH] x86: Run checksumming in parallel accross multiple alu's Doug Ledford
2013-10-30 10:27 ` David Laight
2013-10-30 11:02 ` Neil Horman
2013-10-30 12:18 ` David Laight
2013-10-30 13:22 ` Doug Ledford
2013-10-30 13:35 ` Doug Ledford
2013-10-30 14:04 ` David Laight
2013-10-30 14:52 ` Neil Horman
2013-10-31 18:30 ` Neil Horman
2013-11-01 9:21 ` Ingo Molnar
2013-11-01 15:42 ` Ben Hutchings
2013-11-01 16:08 ` Neil Horman
2013-11-01 16:16 ` Ben Hutchings
2013-11-01 16:18 ` David Laight
2013-11-01 17:37 ` Neil Horman
2013-11-01 19:45 ` Joe Perches
2013-11-01 19:58 ` Neil Horman
2013-11-01 20:26 ` Joe Perches
2013-11-02 2:07 ` Neil Horman
2013-11-04 9:47 ` David Laight
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