qcmadness

未來就唔知,SSE2以前是壓片圖像等等才用到,windows都冇用,現在windows 10已變成必要的指令集 ...
vsp 發表於 2017-2-19 21:12

因為你唔知點解

AMD果陣design x86-64果陣已經指向 depreciate x87
要用SSE2代替, 所以Win 10咪要用SSE2

唔記得同你講, SSE2係2001年出現既, 所以到AVX係必要果陣時, 乜鬼Kabylake同Zen已經死哂啦

vsp

Most encoder will choose SSE instruction set as default. Like this handbrake demo with Ryzen def ...
Jacqueline 發表於 2017-2-19 21:03

AMD,INTEL,SSE,AVX performance comparison:
http://www.numberworld.org/y-cru ... -optimizations.html

hioohi

回覆 815# vsp


    岩岩試左handbrake appleTV 3 preset default, ryzen羸6900k果個setting
"x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2"

Jacqueline

AMD,INTEL,SSE,AVX performance comparison:
vsp 發表於 2017-2-19 21:14

Does it conclude SSE is not used by the encoder? Do you know the purpose of the test?

qcmadness

回覆  vsp


    岩岩試左handbrake appleTV 3 preset default, ryzen羸6900k果個setting
"x264 : using c ...
hioohi 發表於 2017-2-19 21:22

Does it conclude SSE is not used by the encoder? Do you know the purpose of the test?
Jacqueline 發表於 2017-2-19 21:23

佢會同你地講個test無用盡AVX2

vsp

以我所知develop x264果時,主要是優化SSE2,AVX等等指令,到AVX2出現時,x264已經接近完成階段,冇記錯只用compile做優化
但開始develop x265時已經以AVX2為主,雖然都有優化SSE2,AVX,AVX2等等指令,但相關指令速度相差十分遠

vsp

x265詳情可以睇以下link,search sse2,avx,avx2比較一下不同指令優化完運行速度
http://www.videohelp.com/softwar ... n-history#changelog

vsp

回覆  vsp


    岩岩試左handbrake appleTV 3 preset default, ryzen羸6900k果個setting
"x264 : using c ...
hioohi 發表於 2017-2-19 21:22

x264仍然以avx,sse為主

ernesttsim

非常感谢楼主的分享!!!

inone2

回覆 819# qcmadness


    信我，除壓片外仲有(EXCEL)某些複習運算要用到，快很多的!!!!!