From: Ingo Molnar <mingo@elte.hu>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: jdike@addtoit.com, linux-kernel@vger.kernel.org,
user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] scheduling anomaly on uml (was: -rt doesn't compile for UML)
Date: Thu, 29 Nov 2007 17:25:56 +0100 [thread overview]
Message-ID: <20071129162556.GA4268@elte.hu> (raw)
In-Reply-To: <E1Ixlv9-0001rb-U7@dorka.pomaz.szeredi.hu>
* Miklos Szeredi <miklos@szeredi.hu> wrote:
> > to get symbolic stack backdumps for the wakeup points, and add
> > trace_special_sym() calls to generate extra stackdump entries at
> > arbitrary places. schedule() does not have it right now - it might
> > make sense to add it.
>
> OK, this helped.
>
> It looks like the delays are caused by the page allocator, and not
> UML. Which is good news, because I'm supposed to understand memory
> management better than scheduling.
heh :-) Scheduling isnt hard either - and looking at traces (especially
with mcount_enabled=1) certainly helps.
Ingo
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WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@elte.hu>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: jdike@addtoit.com, user-mode-linux-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: Re: scheduling anomaly on uml (was: -rt doesn't compile for UML)
Date: Thu, 29 Nov 2007 17:25:56 +0100 [thread overview]
Message-ID: <20071129162556.GA4268@elte.hu> (raw)
In-Reply-To: <E1Ixlv9-0001rb-U7@dorka.pomaz.szeredi.hu>
* Miklos Szeredi <miklos@szeredi.hu> wrote:
> > to get symbolic stack backdumps for the wakeup points, and add
> > trace_special_sym() calls to generate extra stackdump entries at
> > arbitrary places. schedule() does not have it right now - it might
> > make sense to add it.
>
> OK, this helped.
>
> It looks like the delays are caused by the page allocator, and not
> UML. Which is good news, because I'm supposed to understand memory
> management better than scheduling.
heh :-) Scheduling isnt hard either - and looking at traces (especially
with mcount_enabled=1) certainly helps.
Ingo
next prev parent reply other threads:[~2007-11-29 16:26 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-28 12:47 [uml-devel] -rt doesn't compile for UML Miklos Szeredi
2007-11-28 12:47 ` Miklos Szeredi
2007-11-28 12:50 ` [uml-devel] " Ingo Molnar
2007-11-28 12:50 ` Ingo Molnar
2007-11-28 13:09 ` [uml-devel] " Miklos Szeredi
2007-11-28 13:09 ` Miklos Szeredi
2007-11-28 13:15 ` [uml-devel] " Ingo Molnar
2007-11-28 13:15 ` Ingo Molnar
2007-11-28 13:15 ` [uml-devel] " Ingo Molnar
2007-11-28 13:15 ` Ingo Molnar
2007-11-28 13:24 ` [uml-devel] " Miklos Szeredi
2007-11-28 13:24 ` Miklos Szeredi
2007-11-28 15:08 ` [uml-devel] " Jeff Dike
2007-11-28 15:08 ` Jeff Dike
2007-11-28 15:38 ` [uml-devel] " Miklos Szeredi
2007-11-28 15:38 ` Miklos Szeredi
2007-11-28 15:41 ` [uml-devel] " Ingo Molnar
2007-11-28 15:41 ` Ingo Molnar
2007-11-28 16:00 ` [uml-devel] " Miklos Szeredi
2007-11-28 16:00 ` Miklos Szeredi
2007-11-28 16:05 ` [uml-devel] " Ingo Molnar
2007-11-28 16:05 ` Ingo Molnar
2007-11-28 16:57 ` [uml-devel] " Miklos Szeredi
2007-11-28 16:57 ` Miklos Szeredi
2007-11-28 17:02 ` [uml-devel] " Ingo Molnar
2007-11-28 17:02 ` Ingo Molnar
2007-11-28 17:02 ` [uml-devel] " Miklos Szeredi
2007-11-28 17:02 ` Miklos Szeredi
2007-11-28 17:24 ` [uml-devel] " Ingo Molnar
2007-11-28 17:24 ` Ingo Molnar
2007-11-28 17:25 ` [uml-devel] " Miklos Szeredi
2007-11-28 17:25 ` Miklos Szeredi
2007-11-28 17:38 ` [uml-devel] " Jeff Dike
2007-11-28 17:38 ` Jeff Dike
2007-11-28 15:06 ` [uml-devel] " Jeff Dike
2007-11-28 15:06 ` Jeff Dike
2007-11-28 15:35 ` [uml-devel] " Miklos Szeredi
2007-11-28 15:35 ` Miklos Szeredi
2007-11-28 18:29 ` [uml-devel] " Jeff Dike
2007-11-28 18:29 ` Jeff Dike
2007-11-28 18:37 ` [uml-devel] " Ingo Molnar
2007-11-28 18:37 ` Ingo Molnar
2007-11-28 18:46 ` [uml-devel] " Miklos Szeredi
2007-11-28 18:46 ` Miklos Szeredi
2007-11-29 10:19 ` [uml-devel] scheduling anomaly on uml (was: -rt doesn't compile for UML) Miklos Szeredi
2007-11-29 10:19 ` Miklos Szeredi
2007-11-29 10:57 ` [uml-devel] " Ingo Molnar
2007-11-29 10:57 ` Ingo Molnar
2007-11-29 11:36 ` [uml-devel] " Miklos Szeredi
2007-11-29 11:36 ` Miklos Szeredi
2007-11-29 11:50 ` [uml-devel] " Ingo Molnar
2007-11-29 11:50 ` Ingo Molnar
2007-11-29 16:07 ` [uml-devel] " Miklos Szeredi
2007-11-29 16:07 ` Miklos Szeredi
2007-11-29 16:25 ` Ingo Molnar [this message]
2007-11-29 16:25 ` Ingo Molnar
2007-11-29 18:05 ` [uml-devel] " Miklos Szeredi
2007-11-29 18:05 ` Miklos Szeredi
2007-11-29 19:26 ` [uml-devel] " Ingo Molnar
2007-11-29 19:26 ` Ingo Molnar
2007-11-29 17:02 ` [uml-devel] " Jeff Dike
2007-11-29 17:02 ` Jeff Dike
2007-11-29 17:16 ` [uml-devel] " Ingo Molnar
2007-11-29 17:16 ` Ingo Molnar
2007-11-29 17:58 ` [uml-devel] " Miklos Szeredi
2007-11-29 17:58 ` Miklos Szeredi
2007-11-30 19:44 ` [uml-devel] " Miklos Szeredi
2007-11-30 19:44 ` Miklos Szeredi
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