[FFmpeg-devel] Jpeg2000 decoders comparison
Nicolas BERTRAND
nicoinattendu at gmail.com
Sat Jul 6 00:53:11 CEST 2013
May be the pb is more on memory or too much instructions ???
perf shows for 12 threads :
--- for jpeg2000 Native decoder
Performance counter stats for './ffmpeg -threads 12 -loglevel error
-vcodec jpeg2000 -i /media/data/utopia_data/films/DCP/CHIENS2/video.mxf
-t 3 -f null null':
589 925 754 cache-references [71,38%]
132 271 091 cache-misses # 22,422 % of all cache
refs [57,27%]
109 407 801 847 cycles # 0,000
GHz [57,22%]
83 521 095 479 instructions # 0,76 insns per
cycle [71,48%]
13 421 954 350 branches [71,39%]
158 282 faults
94 migrations
0 LLC-loads [71,43%]
0 LLC-load-misses # 0,00% of all LL-cache
hits [71,36%]
4,746291729 seconds time elapsed
--for libopenjpeg
Performance counter stats for './avconv -threads 12 -loglevel error
-vcodec libopenjpeg -i
/media/data/utopia_data/films/DCP/CHIENS2/video.mxf -t 3 -f null null':
491 788 606 cache-references
111 923 347 cache-misses # 22,758 % of all cache
refs
68 873 050 575 cycles # 0,000 GHz
104 900 692 720 instructions # 1,52 insns per cycle
17 331 679 785 branches
806 771 faults
200 migrations
2,950059927 seconds time elapsed
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