From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Cc: Gregory Haskins <ghaskins@novell.com>,
Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org
Subject: Re: [sched-devel, patch-rfc] rework of "prioritize non-migratable tasks over migratable ones"
Date: Wed, 11 Jun 2008 10:53:02 +0200 [thread overview]
Message-ID: <1213174382.31518.69.camel@twins> (raw)
In-Reply-To: <1213138710.26530.51.camel@earth>
On Wed, 2008-06-11 at 00:58 +0200, Dmitry Adamushko wrote:
> Hi Gregory,
>
>
> regarding this commit: 45c01e824991b2dd0a332e19efc4901acb31209f
>
>
> I think we can do it simpler. Please take a look at the patch below.
>
> Instead of having 2 separate arrays (which is + ~800 bytes on x86_32 and twice so on x86_64),
> let's add "exclusive" (the ones that are bound to this CPU) tasks to the head of the queue
> and "shared" ones -- to the end.
>
> In case of a few newly woken up "exclusive" tasks, they are 'stacked' (not queued as now), meaning that
> a task {i+1} is being placed in front of the previously woken up task {i}. But I don't think that
> this behavior may cause any realistic problems.
Doesn't this violate POSIX ?
next prev parent reply other threads:[~2008-06-11 8:56 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-10 22:58 [sched-devel, patch-rfc] rework of "prioritize non-migratable tasks over migratable ones" Dmitry Adamushko
2008-06-11 8:53 ` Peter Zijlstra [this message]
2008-06-11 10:05 ` Dmitry Adamushko
2008-06-13 13:08 ` Peter Zijlstra
2008-06-16 14:26 ` Gregory Haskins
2008-06-16 17:59 ` Dmitry Adamushko
2008-06-16 18:44 ` Gregory Haskins
2008-06-16 19:17 ` Peter Zijlstra
2008-06-16 19:54 ` [sched-devel, patch-rfc] rework of "prioritize non-migratabletasks " Gregory Haskins
2008-06-18 10:39 ` Ingo Molnar
2008-06-18 10:47 ` Peter Zijlstra
2008-06-18 11:52 ` [sched-devel, patch-rfc] rework of "prioritizenon-migratabletasks " Gregory Haskins
2008-06-18 11:58 ` [sched-devel, patch-rfc] rework of "prioritize non-migratabletasks " Dmitry Adamushko
2008-07-01 10:46 ` [sched-devel, patch-rfc] rework of "prioritize non-migratable tasks " Dmitry Adamushko
2008-07-15 12:48 ` Peter Zijlstra
2008-06-18 10:44 ` Ingo Molnar
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