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From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Olivier Doucet <webmaster@ajeux.com>
Cc: Borislav Petkov <bp@alien8.de>, linux-kernel@vger.kernel.org
Subject: Re: Performance issue since 3.2.6
Date: Mon, 21 Jan 2013 23:49:34 +0100	[thread overview]
Message-ID: <18379918.sbmR7uiKVn@vostro.rjw.lan> (raw)
In-Reply-To: <CAPPqfY3vZX3a-GONmzoWdn7sp=_pzKL2qAKBxYZ9ABNLetKoag@mail.gmail.com>

On Monday, January 21, 2013 03:26:10 PM Olivier Doucet wrote:
> >> FYI, I benchmarked a new version with :
> >> CONFIG_PM_RUNTIME=y
> >> CONFIG_PM=y
> >>
> >> but the performance loss is still present.
> >
> > In that case it is not quite likely that the commit you bisected to
> > really introduced the problem, because it doesn't change things for
> > CONFIG_PM=y.
> >
> > Does reverting that commit still help?
> 
> I tested several combinations. Results follows :
> 3.2.6 (base) + CONFIG_PM unset  => BAD
> 3.2.6 (base) + CONFIG_PM=y  => BAD
> 3.2.6 (base) + patch reverted + CONFIG_PM=y  => BAD
> 3.2.6 (base) + patch reverted + CONFIG_PM unset  => GOOD

I see.  Two bugs, then.

> So if I understand right, the targeted patch introduced the bug when
> CONFIG_PM is unset, but there is an other bug when this var is set.
> I'll try to track this commit.

Thanks a lot!

Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.

  reply	other threads:[~2013-01-21 22:43 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-18 21:05 Olivier Doucet
2013-01-18 21:24 ` Borislav Petkov
2013-01-18 21:46   ` Rafael J. Wysocki
2013-01-18 21:43     ` Olivier Doucet
2013-01-18 22:17       ` Rafael J. Wysocki
2013-01-21 13:18         ` Olivier Doucet
2013-01-21 13:29           ` Rafael J. Wysocki
2013-01-21 14:26             ` Olivier Doucet
2013-01-21 22:49               ` Rafael J. Wysocki [this message]
2013-01-21 22:57                 ` Olivier Doucet
2013-01-21 23:09                   ` Rafael J. Wysocki
2013-01-31 15:15                     ` Olivier Doucet
2013-02-12 21:09                       ` Olivier Doucet
2013-05-17 18:17                         ` Olivier Doucet
2013-05-17 19:50                           ` Srivatsa S. Bhat
2013-05-17 23:51                             ` Rafael J. Wysocki
2013-05-18  5:04                               ` Srivatsa S. Bhat

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