linux-kernel - Re: [PATCH][GIT PULL] sched/cpupri: Remove the vec->lock

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Message-ID: <CAJd=RBDiU02XVwDeDwLZ-MNDq_Vn5ONYOFoQz1Fe4EAV9W=1fw@mail.gmail.com>
Date:	Wed, 3 Aug 2011 22:18:25 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <mgalbraith@...e.de>,
	"Luis Claudio R." <lgoncalv@...hat.com>
Subject: Re: [PATCH][GIT PULL] sched/cpupri: Remove the vec->lock

On Wed, Aug 3, 2011 at 4:36 AM, Steven Rostedt <rostedt@...dmis.org> wrote:
>    The migrate code does stress the RT tasks a bit. This shows that
>    the loop did increase a little after the patch, but not by much.
>    The vec code dropped dramatically. From 4.3us down to .42us.
>    That's a 10x improvement!
>
>    Tested-by: Mike Galbraith <mgalbraith@...e.de>
>    Tested-by: Luis Claudio R. Gonçalves <lgoncalv@...hat.com>
>    Tested-by: Matthew Hank Sabins<msabins@...ux.vnet.ibm.com>
>    Reviewed-by: Gregory Haskins <gregory.haskins@...il.com>
>    Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
>
Acked-by: Hillf Danton <dhillf@...il.com>
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