linux-kernel - Re: [PATCH 0/6] Basic scheduler support for automatic NUMA balancing

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Message-ID: <20130702052812.GA2654@linux.vnet.ibm.com>
Date:	Tue, 2 Jul 2013 10:58:12 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/6] Basic scheduler support for automatic NUMA balancing

* Mel Gorman <mgorman@...e.de> [2013-07-01 09:43:21]:

> 
> Thanks. Each of the the two runs had 5 iterations and there is a
> difference in the reported average. Do you know what the standard
> deviation is of the results?

Yes, the results were from 2 different runs. 
I hadnt calculated the std deviation for those runs.
> 
> I'm less concerned about the numa01 results as it is an adverse
> workload on machins with more than two sockets but the numa02 results
> are certainly of concern. My own testing for numa02 showed little or no
> change. Would you mind testing with "Increase NUMA PTE scanning when a
> new preferred node is selected" reverted please?
> 

Here are the results with the last patch reverted as requested by you.

KernelVersion: 3.9.0-mainline_v39+ your patches - last patch
		Testcase:      Min      Max      Avg  StdDev  %Change
		  numa01:  1704.50  1841.82  1757.55   49.27    2.42%
     numa01_THREAD_ALLOC:   433.25   517.07   464.17   28.15  -32.99%
		  numa02:    55.64    61.75    57.70    2.19  -43.52%
	      numa02_SMT:    44.78    53.45    48.72    2.91  -18.53%



Detailed run output here 

numa01 1704.50 248.67 71999.86 207091 1093
numa01_THREAD_ALLOC 461.62 416.89 23064.79 90283 961
numa02 61.75 93.86 2444.21 10652 6
numa02_SMT 46.79 23.13 977.94 1925 8
numa01 1769.09 262.00 74607.77 226677 1313
numa01_THREAD_ALLOC 433.25 365.12 21994.25 88597 773
numa02 55.64 89.52 2250.01 8848 210
numa02_SMT 49.39 19.81 938.86 1376 33
numa01 1841.82 407.73 78683.69 227428 1834
numa01_THREAD_ALLOC 517.07 465.71 26152.60 111689 978
numa02 55.95 103.26 2223.36 8471 158
numa02_SMT 53.45 19.73 962.08 1349 26
numa01 1760.41 474.74 76094.03 231278 2802
numa01_THREAD_ALLOC 456.80 395.35 23170.23 88049 835
numa02 57.18 87.31 2390.11 10804 3
numa02_SMT 44.78 26.48 944.28 1314 7
numa01 1711.91 421.49 77728.30 224185 2103
numa01_THREAD_ALLOC 452.09 430.88 22271.38 83418 2035
numa02 57.97 126.86 2354.34 8991 135
numa02_SMT 49.19 34.99 914.35 1308 22


> -- 
> Mel Gorman
> SUSE Labs
> 

-- 
Thanks and Regards
Srikar Dronamraju

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