linux-kernel - Re: [PATCH 0/4] Fix ebizzy performance regression due to X86 TLB range flush v2

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Date:	Fri, 13 Dec 2013 14:38:32 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>
CC:	Alex Shi <alex.shi@...aro.org>, Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Linux-X86 <x86@...nel.org>, Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/4] Fix ebizzy performance regression due to X86 TLB
 range flush v2

On 12/13/2013 01:16 PM, Linus Torvalds wrote:
> On Fri, Dec 13, 2013 at 12:01 PM, Mel Gorman <mgorman@...e.de> wrote:
>>
>> ebizzy
>>                       3.13.0-rc3                3.4.69            3.13.0-rc3            3.13.0-rc3
>>       thread             vanilla               vanilla       altershift-v2r1           nowalk-v2r7
>> Mean     1     7377.91 (  0.00%)     6812.38 ( -7.67%)     7784.45 (  5.51%)     7804.08 (  5.78%)
>> Mean     2     8262.07 (  0.00%)     8276.75 (  0.18%)     9437.49 ( 14.23%)     9450.88 ( 14.39%)
>> Mean     3     7895.00 (  0.00%)     8002.84 (  1.37%)     8875.38 ( 12.42%)     8914.60 ( 12.91%)
>> Mean     4     7658.74 (  0.00%)     7824.83 (  2.17%)     8509.10 ( 11.10%)     8399.43 (  9.67%)
>> Mean     5     7275.37 (  0.00%)     7678.74 (  5.54%)     8208.94 ( 12.83%)     8197.86 ( 12.68%)
>> Mean     6     6875.50 (  0.00%)     7597.18 ( 10.50%)     7755.66 ( 12.80%)     7807.51 ( 13.56%)
>> Mean     7     6722.48 (  0.00%)     7584.75 ( 12.83%)     7456.93 ( 10.93%)     7480.74 ( 11.28%)
>> Mean     8     6559.55 (  0.00%)     7591.51 ( 15.73%)     6879.01 (  4.87%)     6881.86 (  4.91%)
> 
> Hmm. Do you have any idea why 3.4.69 still seems to do better at
> higher thread counts?
> 
> No complaints about this patch-series, just wondering..
> 

It would be really great to get some performance numbers on something
other than ebizzy, though...

	-hpa


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