linux-kernel - Re: [PATCH] sched: smart wake-affine

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Message-ID: <51DB7AF7.50708@linux.vnet.ibm.com>
Date:	Tue, 09 Jul 2013 10:52:39 +0800
From:	Michael Wang <wangyun@...ux.vnet.ibm.com>
To:	Davidlohr Bueso <davidlohr.bueso@...com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Mike Galbraith <efault@....de>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>, Alex Shi <alex.shi@...el.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Turner <pjt@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Nikunj A. Dadhania" <nikunj@...ux.vnet.ibm.com>,
	Ram Pai <linuxram@...ibm.com>
Subject: Re: [PATCH] sched: smart wake-affine

On 07/09/2013 10:36 AM, Davidlohr Bueso wrote:
[snip]
>> 2. is the 3.10-rc5 in image also disabled the hyperthreading?
> 
> Yes, I happened to have data already collected for 3.10-rc5. While the
> runs with this patch was with -rc7, unless there was some performance
> related commit I missed, I don't think the performance difference was
> because of that.
> 
>> 3. is the v3 patch set show the same issue?
> 
> Uhmmm shoot, I didn't realize there was a v3, sorry about that.
> 
> /me takes another look at the thread.

V3 will reduce the overhead, should make things better, especially when
workload is high and platform is big (your box is really what I desired
;-), honestly).

And if it is possible, comparison based on the same basement will be
better :)

Regards,
Michael Wang

> 
> Thanks,
> Davidlohr
> 

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