Re: [RFC 0/3] reduce latency of direct async compaction

From	Aaron Lu <aaron.lu@intel.com>
Newsgroups	linux.kernel
Subject	Re: [RFC 0/3] reduce latency of direct async compaction
Date	2015-12-03 12:40 +0100
Message-ID	<qBAoW-4kA-3@gated-at.bofh.it> (permalink)
References	<qBxhn-2o6-3@gated-at.bofh.it> <qByn8-34K-13@gated-at.bofh.it> <qBywO-38I-19@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Dec 03, 2015 at 10:38:50AM +0100, Vlastimil Babka wrote:
> On 12/03/2015 10:25 AM, Aaron Lu wrote:
> > On Thu, Dec 03, 2015 at 09:10:44AM +0100, Vlastimil Babka wrote:
> >> Aaron, could you try this on your testcase?
> > 
> > The test result is placed at:
> > https://drive.google.com/file/d/0B49uX3igf4K4enBkdVFScXhFM0U
> > 
> > For some reason, the patches made the performace worse. The base tree is
> > today's Linus git 25364a9e54fb8296837061bf684b76d20eec01fb, and its
> > performace is about 1000MB/s. After applying this patch series, the
> > performace drops to 720MB/s.
> > 
> > Please let me know if you need more information, thanks.
> 
> Hm, compaction stats are at 0. The code in the patches isn't even running.
> Can you provide the same data also for the base tree?

My bad, I uploaded the wrong data :-/
I uploaded again:
https://drive.google.com/file/d/0B49uX3igf4K4UFI4TEQ3THYta0E

And I just run the base tree with trace-cmd and found that its
performace drops significantly(from 1000MB/s to 6xxMB/s), is it that
trace-cmd will impact performace a lot? Any suggestions on how to run
the test regarding trace-cmd? i.e. should I aways run usemem under
trace-cmd or only when necessary?

Thanks,
Aaron
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Thread

[RFC 0/3] reduce latency of direct async compaction Vlastimil Babka <vbabka@suse.cz> - 2015-12-03 09:20 +0100
  [RFC 1/3] mm, compaction: reduce spurious pcplist drains Vlastimil Babka <vbabka@suse.cz> - 2015-12-03 09:20 +0100
  [RFC 3/3] mm, compaction: direct freepage allocation for async direct compaction Vlastimil Babka <vbabka@suse.cz> - 2015-12-03 09:20 +0100
  Re: [RFC 0/3] reduce latency of direct async compaction Aaron Lu <aaron.lu@intel.com> - 2015-12-03 10:30 +0100
    Re: [RFC 0/3] reduce latency of direct async compaction Vlastimil Babka <vbabka@suse.cz> - 2015-12-03 10:40 +0100
      Re: [RFC 0/3] reduce latency of direct async compaction Aaron Lu <aaron.lu@intel.com> - 2015-12-03 12:40 +0100
        Re: [RFC 0/3] reduce latency of direct async compaction Vlastimil Babka <vbabka@suse.cz> - 2015-12-04 13:40 +0100
          Re: [RFC 0/3] reduce latency of direct async compaction Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2015-12-07 08:40 +0100
            Re: [RFC 0/3] reduce latency of direct async compaction Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2015-12-08 01:50 +0100
              Re: [RFC 0/3] reduce latency of direct async compaction Aaron Lu <aaron.lu@intel.com> - 2015-12-08 06:20 +0100
                Re: [RFC 0/3] reduce latency of direct async compaction Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2015-12-08 08:00 +0100
                Re: [RFC 0/3] reduce latency of direct async compaction Aaron Lu <aaron.lu@intel.com> - 2015-12-08 10:00 +0100
                Re: [RFC 0/3] reduce latency of direct async compaction Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2015-12-09 01:40 +0100
                Re: [RFC 0/3] reduce latency of direct async compaction Aaron Lu <aaron.lu@intel.com> - 2015-12-09 06:50 +0100
                Re: [RFC 0/3] reduce latency of direct async compaction Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2015-12-10 05:50 +0100
                Re: [RFC 0/3] reduce latency of direct async compaction Aaron Lu <aaron.lu@intel.com> - 2015-12-10 07:20 +0100
  Re: [RFC 0/3] reduce latency of direct async compaction Aaron Lu <aaron.lu@intel.com> - 2015-12-04 07:30 +0100
    Re: [RFC 0/3] reduce latency of direct async compaction Vlastimil Babka <vbabka@suse.cz> - 2015-12-04 13:40 +0100
      Re: [RFC 0/3] reduce latency of direct async compaction Aaron Lu <aaron.lu@intel.com> - 2015-12-07 04:20 +0100

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