[FFmpeg-trac] #5171(ffmpeg:new): Performance degradation of FFmpeg on POWER

FFmpeg trac at avcodec.org
Tue Jan 19 10:07:57 CET 2016

#5171: Performance degradation of FFmpeg on POWER
             Reporter:  Priya        |                     Type:
               Status:  new          |  enhancement
            Component:  ffmpeg       |                 Priority:  important
             Keywords:               |                  Version:  git-
  POWER,performance,x264             |  master
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
 Performance of FFmpeg using x264 codec on ppc64le is 30%-50% slower than
 x86. This is in contrast to what is expected on Power8/LE. The x264 and
 other codecs needs to be further optimized for Power8/LE as there is
 signification performance degradation on POWER. Attached are the test
 results for FFmpeg+x264 codec.

 FFmpeg was compiled as:
 ./configure --enable-gpl --enable-memory-poisoning --enable-avresample
 --enable-libx264  --extra-cflags=-I/usr/local/include --extra-

 x264 codec is compiled as:
 ./configure  --enable-shared --enable-static --enable-debug

 Run time options used:
 perf stat -o perf.log ffmpeg -i VanillaCakeRecipeDemonstration-
 Joyofbaking.com.mp4 -vcodec libx264 -acodec aac -strict experimental
 -threads 0 -level 31 -r 30000/1001 -b 1900k -pix_fmt yuv420p -tune ssim
 -profile high -vf setdar=16:9,setsar=1:1 -x264opts
 :no-fast-pskip=1:no-dct-decimate=1:fps=29.97 -f mp4 -y /dev/null

Ticket URL: <https://trac.ffmpeg.org/ticket/5171>
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