[FFmpeg-devel] [PATCH] PPC64: Add versions of functions in libswscale/input.c optimized for POWER8 VSX SIMD.
Carl Eugen Hoyos
cehoyos at ag.or.at
Mon Jul 4 12:20:03 EEST 2016
Dan Parrot <dan.parrot <at> mail.com> writes:
> The dataset used was the entire FATE regression suite.
I don't think this is a particularly useful testcase:
It takes very long but mostly tests other things.
Did you test if using ffmpeg -benchmark -f rawvideo -i /dev/zero...
showed different results?
I believe this should be both easier and faster to test.
> name: rgb24ToY_c_vsx.
> no. of calls: 9999. min: 3832 ns. avg: 4709 ns. max: 37550 ns.
> total: 47093533 ns.
> name: rgb24ToY_c.
> no. of calls: 9999. min: 3809 ns. avg: 4707 ns. max: 29041 ns.
> total: 47072923 ns.
Without any data, I would have thought that this is the most
important function (and "no. of calls" seems to confirm this).
Why is this not faster?
Can you confirm with START_TIMER / STOP_TIMER that there is no
Thank you, Carl Eugen
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