Am 10.04.2017 um 14:59 schrieb fred fred:
hello Harald, it is not a conclusion, it's an expectation ! and a question :
for one file from some format to x265, what it the best efficient way to use my
24 cores ? can you contribute ?BestFred
parallelization depends on a lot of things and you always have sharded
ressources like memory, IO, thread-synchronisation - for one video task
probably there is just no way to get 24 core to 100% CPU usage
with 3 different parallel tasks each using 8 cores probably better
because each one has it's own thread-synchronisation and so on
you just can't expect that throwing enough CPU cores on a problem will
solve it faster the same as 9 girls can't make a child in one month :-)
Le Lundi 10 avril 2017 14h54, Reindl Harald <[email protected]> a
écrit :
Am 10.04.2017 um 14:43 schrieb fred fred:
thank you Moritz !
anyway, even with -threads 0
x265 [info]: Thread pool created using 24 threadsx265
I see with top command between 400% - 500% CPU on ffmpeg ...
I was expected like 2400% or 24 ffmpeg workers with 100%
how did you come to the conclusion that parallelization scales magically
and with no limits? if that would be realistic just throwing enough CPU
cores on whatever problem would be the soplution - but that is not how
computers are working
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