linux-kernel - [mm] f7b5d647946: -3.0% dbench.throughput-MB/sec

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Date:	Tue, 19 Aug 2014 12:41:34 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [mm] f7b5d647946: -3.0% dbench.throughput-MB/sec

Hi Mel,

We noticed a minor dbench throughput regression on commit
f7b5d647946aae1647bf5cd26c16b3a793c1ac49 ("mm: page_alloc: abort fair
zone allocation policy when remotes nodes are encountered").

testcase: ivb44/dbench/100%

bb0b6dffa2ccfbd  f7b5d647946aae1647bf5cd26
---------------  -------------------------
     25692 ± 0%      -3.0%      24913 ± 0%  dbench.throughput-MB/sec
   6974259 ± 6%     -12.1%    6127616 ± 0%  meminfo.DirectMap2M
     18.43 ± 0%      -4.6%      17.59 ± 0%  turbostat.RAM_W
      9302 ± 0%      -3.6%       8965 ± 1%  time.user_time
   1425791 ± 1%      -2.0%    1396598 ± 0%  time.involuntary_context_switches

Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.

Thanks,
Fengguang

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