> > > > Can you confirm with START_TIMER / STOP_TIMER that there is no > > > > gain? > > > > > > SystemTap probes provide identical functionality by measuring > > > deltas between function entry and function return. > > > > Sorry, I don't understand: > > Did you test with both methods to verify that they provide > > the same results? > > > > Note that if it turns out that START_TIMER / STOP_TIMER > > cannot be used on ppc64 (le) this would be important > > information for us. > > > I'll insert these macros and inform of the results if the code compiles > and runs.
These results for START_TIMER/STOP_TIMER are with ffmpeg compiled using GCC 6.1.1 ====================== Existing non-SIMD version: ./ffmpeg -report -cpuflags 0 -benchmark -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt yuv420p -f null -vframes 1000 - 33770 UNITS in rgb24ToY_c, 1 runs, 0 skips 33430 UNITS in rgb24ToY_c, 2 runs, 0 skips 33292 UNITS in rgb24ToY_c, 4 runs, 0 skips 33128 UNITS in rgb24ToY_c, 8 runs, 0 skips 32848 UNITS in rgb24ToY_c, 16 runs, 0 skips 32347 UNITS in rgb24ToY_c, 32 runs, 0 skips 31831 UNITS in rgb24ToY_c, 64 runs, 0 skips 31594 UNITS in rgb24ToY_c, 128 runs, 0 skips 31513 UNITS in rgb24ToY_c, 256 runs, 0 skips 31628 UNITS in rgb24ToY_c, 512 runs, 0 skips 31466 UNITS in rgb24ToY_c, 1024 runs, 0 skips 31390 UNITS in rgb24ToY_c, 2048 runs, 0 skips 31411 UNITS in rgb24ToY_c, 4096 runs, 0 skips 31411 UNITS in rgb24ToY_c, 8192 runs, 0 skipstrate=N/A speed=0.522x 31399 UNITS in rgb24ToY_c, 16384 runs, 0 skipstrate=N/A speed=0.486x 31416 UNITS in rgb24ToY_c, 32763 runs, 5 skipstrate=N/A speed=0.467x 31413 UNITS in rgb24ToY_c, 65530 runs, 6 skipstrate=N/A speed=0.458x 31421 UNITS in rgb24ToY_c, 131064 runs, 8 skipstrate=N/A speed=0.454x 31430 UNITS in rgb24ToY_c, 262131 runs, 13 skipstrate=N/A speed=0.449x 31422 UNITS in rgb24ToY_c, 524264 runs, 24 skipstrate=N/A speed=0.449x 31424 UNITS in rgb24ToY_c, 1048532 runs, 44 skipstrate=N/A speed=0.45x frame= 1000 fps= 11 q=-0.0 Lsize=N/A time=00:00:40.00 bitrate=N/A speed=0.449x video:477kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown bench: utime=88.212s bench: maxrss=21120kB ---------------------------------------------------------- ./ffmpeg -report -benchmark -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt yuv420p -f null -vframes 1000 - 35440 UNITS in rgb24ToY_c, 1 runs, 0 skips 34290 UNITS in rgb24ToY_c, 2 runs, 0 skips 33670 UNITS in rgb24ToY_c, 4 runs, 0 skips 33387 UNITS in rgb24ToY_c, 8 runs, 0 skips 32786 UNITS in rgb24ToY_c, 16 runs, 0 skips 32317 UNITS in rgb24ToY_c, 32 runs, 0 skips 32008 UNITS in rgb24ToY_c, 64 runs, 0 skips 31944 UNITS in rgb24ToY_c, 128 runs, 0 skips 32049 UNITS in rgb24ToY_c, 256 runs, 0 skips 31913 UNITS in rgb24ToY_c, 512 runs, 0 skips 31822 UNITS in rgb24ToY_c, 1024 runs, 0 skips 31805 UNITS in rgb24ToY_c, 2048 runs, 0 skips 31841 UNITS in rgb24ToY_c, 4096 runs, 0 skips 31825 UNITS in rgb24ToY_c, 8192 runs, 0 skips 31803 UNITS in rgb24ToY_c, 16383 runs, 1 skipstrate=N/A speed=0.649x 31822 UNITS in rgb24ToY_c, 32766 runs, 2 skipstrate=N/A speed=0.602x 31816 UNITS in rgb24ToY_c, 65532 runs, 4 skipstrate=N/A speed=0.59x 31811 UNITS in rgb24ToY_c, 131064 runs, 8 skipstrate=N/A speed=0.584x 31810 UNITS in rgb24ToY_c, 262133 runs, 11 skipstrate=N/A speed=0.583x 31811 UNITS in rgb24ToY_c, 524266 runs, 22 skipstrate=N/A speed=0.583x 31822 UNITS in rgb24ToY_c, 1048527 runs, 49 skipstrate=N/A speed=0.582x frame= 1000 fps= 15 q=-0.0 Lsize=N/A time=00:00:40.00 bitrate=N/A speed=0.581x video:477kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown bench: utime=68.211s bench: maxrss=21120kB ============================================ SIMD version in patch submitted earlier in this message thread: ./ffmpeg -report -cpuflags 0 -benchmark -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt yuv420p -f null -vframes 1000 - && ./ffmpeg -report -benchmark -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt yuv420p -f null -vframes 1000 23950 UNITS in rgb24ToY_c_vsx, 1 runs, 0 skips 23175 UNITS in rgb24ToY_c_vsx, 2 runs, 0 skips 22752 UNITS in rgb24ToY_c_vsx, 4 runs, 0 skips 22401 UNITS in rgb24ToY_c_vsx, 8 runs, 0 skips 22106 UNITS in rgb24ToY_c_vsx, 16 runs, 0 skips 21585 UNITS in rgb24ToY_c_vsx, 32 runs, 0 skips 21126 UNITS in rgb24ToY_c_vsx, 64 runs, 0 skips 21046 UNITS in rgb24ToY_c_vsx, 128 runs, 0 skips 20816 UNITS in rgb24ToY_c_vsx, 256 runs, 0 skips 20817 UNITS in rgb24ToY_c_vsx, 512 runs, 0 skips 20767 UNITS in rgb24ToY_c_vsx, 1024 runs, 0 skips 20794 UNITS in rgb24ToY_c_vsx, 2048 runs, 0 skips 20703 UNITS in rgb24ToY_c_vsx, 4096 runs, 0 skips 20681 UNITS in rgb24ToY_c_vsx, 8192 runs, 0 skipse=N/A speed=0.555x 20638 UNITS in rgb24ToY_c_vsx, 16384 runs, 0 skipse=N/A speed=0.516x 20646 UNITS in rgb24ToY_c_vsx, 32768 runs, 0 skipse=N/A speed=0.498x 20634 UNITS in rgb24ToY_c_vsx, 65536 runs, 0 skipse=N/A speed=0.486x 20635 UNITS in rgb24ToY_c_vsx, 131070 runs, 2 skipse=N/A speed=0.483x 20646 UNITS in rgb24ToY_c_vsx, 262139 runs, 5 skipse=N/A speed=0.481x 20651 UNITS in rgb24ToY_c_vsx, 524272 runs, 16 skipse=N/A speed=0.48x 20649 UNITS in rgb24ToY_c_vsx, 1048533 runs, 43 skipse=N/A speed=0.479x frame= 1000 fps= 12 q=-0.0 Lsize=N/A time=00:00:40.00 bitrate=N/A speed=0.478x video:477kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown bench: utime=82.969s bench: maxrss=21248kB ------------------------------------------------------------------------------- ./ffmpeg -report -benchmark -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt yuv420p -f null -vframes 1000 23040 UNITS in rgb24ToY_c_vsx, 1 runs, 0 skips 24140 UNITS in rgb24ToY_c_vsx, 2 runs, 0 skips 24097 UNITS in rgb24ToY_c_vsx, 4 runs, 0 skips 23578 UNITS in rgb24ToY_c_vsx, 8 runs, 0 skips 22892 UNITS in rgb24ToY_c_vsx, 16 runs, 0 skips 22109 UNITS in rgb24ToY_c_vsx, 32 runs, 0 skips 21422 UNITS in rgb24ToY_c_vsx, 64 runs, 0 skips 21086 UNITS in rgb24ToY_c_vsx, 128 runs, 0 skips 20834 UNITS in rgb24ToY_c_vsx, 256 runs, 0 skips 20695 UNITS in rgb24ToY_c_vsx, 512 runs, 0 skips 20652 UNITS in rgb24ToY_c_vsx, 1024 runs, 0 skips 20641 UNITS in rgb24ToY_c_vsx, 2048 runs, 0 skips 20626 UNITS in rgb24ToY_c_vsx, 4096 runs, 0 skips 20648 UNITS in rgb24ToY_c_vsx, 8192 runs, 0 skips 20617 UNITS in rgb24ToY_c_vsx, 16384 runs, 0 skipse=N/A speed=0.701x 20599 UNITS in rgb24ToY_c_vsx, 32768 runs, 0 skipse=N/A speed=0.655x 20601 UNITS in rgb24ToY_c_vsx, 65536 runs, 0 skipse=N/A speed=0.642x 20593 UNITS in rgb24ToY_c_vsx, 131072 runs, 0 skipse=N/A speed=0.635x 20590 UNITS in rgb24ToY_c_vsx, 262140 runs, 4 skipse=N/A speed=0.634x 20592 UNITS in rgb24ToY_c_vsx, 524277 runs, 11 skipse=N/A speed=0.632x 20598 UNITS in rgb24ToY_c_vsx, 1048538 runs, 38 skipse=N/A speed=0.632x frame= 1000 fps= 16 q=-0.0 Lsize=N/A time=00:00:40.00 bitrate=N/A speed=0.631x video:477kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown bench: utime=62.787s bench: maxrss=21184kB _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
