linux-kernel - Re: [PATCH 0/3] RT: scheduler newidle enhancements

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Date:	Mon, 23 Jun 2008 20:15:04 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Gregory Haskins <ghaskins@...ell.com>
cc:	mingo@...e.hu, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	peterz@...radead.org, linux-rt-users@...r.kernel.org,
	dbahi@...ell.com
Subject: Re: [PATCH 0/3] RT: scheduler newidle enhancements


On Mon, 23 Jun 2008, Gregory Haskins wrote:

>
> Hi Ingo, Steven, Thomas,
>   The following series applies to 25.4-rt6 and is "ready for inclusion" from
>   my perspective.  However, due to their nature I am sure we will want to get
>   some review feedback before being considered for acceptance.
>
>   These patches are probably suitable for consideration for
>   mainline/sched-devel as well, but PREEMPT_RT gains the biggest boost from
>   them since it tends to context switch much more frequently than mainline.
>
>   This series makes some adjustments to the way we do newidle balancing.
>   These tweaks were discovered while doing some related scheduler R&D that is
>   not quite ready for the light of day.  But these patches do offer a
>   substantial boost (6-12%) in network performance.  They may help in other
>   areas as well, but networking is where our focus remains currently.
>
>   I think the patch 1/3 is a good one, but it requires careful review. Patch
>   2/3 is based upon some work I had seen PeterZ submit, so its possible to
>   just pull his work (if it hasnt been already) as opposed to this patch, if
>   desired.  Lastly, Patch 3/3 is a bit controversial so I put it last for
>   easier cherry picking of the first two.  It does help in our testing, but it
>   will have to be reviewed carefully.
>
> Comments/feedback/bugfixes more than welcome.

Greg,

I don't see anything wrong with these patches. If either Ingo or Peter
have any issues, I hope they speak up soon. I'll queue them all for 25-rt8
(after I get rt7 out the door).

-- Steve

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