[x264-devel] Re: x264 & slices

[Thomas Herrmann]

Måns writes:

>>> The OS moves tasks between CPUs for various reasons.  This is what you
>>> are seeing.
>>
>> ... ok, but why is threads=4 not using 100% of all 4 CPUs? Is there
>> so much overhead to slice the video?
> 
> Which figure are you looking at?  My bets are your "idle" percentage
> is zero.  The rest is mostly divided between "user" and "system".
> Perhaps you were only checking the "user" value.

... no, thats not the case. While the user value is about 50% running 4
threads, the system value is around 2% and idle value around 48%. So there
is some spare CPU power available!

Regards,   Thomas

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