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List:       linaro-multimedia
Subject:    dts decoder performance result with avconv
From:       mans.rullgard () linaro ! org (Mans Rullgard)
Date:       2011-09-30 21:36:24
Message-ID: CAG5Tg6UeTEhAkttfmv-+PBJFkG47uhwJ7jENVbOza7jBSEdM9Q () mail ! gmail ! com
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2011/9/30 Feng Wei <feng.wei at linaro.org>:
> 2011/9/30 Mans Rullgard <mans.rullgard at linaro.org>:
>> 2011/9/30 Feng Wei <feng.wei at linaro.org>:
>>> I rebuild the libav with neon enabled, and I got the new benchmark, as below
>>>
>>> time avconv -i SourceCode.dts -f s16le a.pcm
>>> panda -- 4.135s (53% better than non-neon version 6.320s)
>>> mx53 ?-- 19.054s (165% better than non-neon version 50.526s)
>>>
>>> So as mru said, dts is mostly neon optimized. Although it's not so
>>> reasonable on A8 cpu, I think we don't need to put it into next cycle.
>>
>> Which revision of libav did you use for these benchmarks? ?Did it include the
>> optimisation I added a couple of days ago (baf6b738)? ?With the latest version,
>> I get almost exactly the same speed on Beagle-xm and Panda. ?Could you share
>> your test file in case there's something special about it?
>
> although i got latest git version today including baf6b738, the
> results are same as my last version.
> I attach the dts file

With that file I get 2.3s on Beagle-xm, 2.2s on Panda, using latest libav git
built with Linaro gcc 4.5-2011.09.

-- 
Mans Rullgard / mru


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