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Date: Sat, 10 Apr 2010 23:42:44 +0300
From: Avi Kivity <avi@redhat.com>
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Subject: Re: [PATCH 00 of 41] Transparent Hugepage Support #17
References: <alpine.LFD.2.00.1004051347480.21411@i5.linux-foundation.org> <20100405232115.GM5825@random.random> <alpine.LFD.2.00.1004051636060.21411@i5.linux-foundation.org> <20100406011345.GT5825@random.random> <alpine.LFD.2.00.1004051836000.5870@i5.linux-foundation.org> <alpine.LFD.2.00.1004051917310.3487@i5.linux-foundation.org> <20100406090813.GA14098@elte.hu> <20100410184750.GJ5708@random.random> <20100410190233.GA30882@elte.hu> <4BC0CFF4.5000207@redhat.com> <20100410194751.GA23751@elte.hu> <4BC0DE84.3090305@redhat.com>
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On 04/10/2010 11:24 PM, Avi Kivity wrote:
>> Oh, this tickled some memories: x264 compressed encoding can be very 
>> cache and
>> TLB intense. Something like the encoding of a 350 MB video file:
>>
>>    wget http://media.xiph.org/video/derf/y4m/soccer_4cif.y4m       # 
>> NOTE: 350 MB!
>>    x264 --crf 20 --quiet soccer_4cif.y4m -o /dev/null --threads 4
>>
>> would be another thing worth trying with transparent-hugetlb enabled.
>>
>
> I'll try it out.
>

3-5% improvement.  I had to tune khugepaged to scan more aggressively 
since the run is so short.  The working set is only ~100MB here though.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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