Ubuntu 16.04.3: Handbrake not 100% of all CPU cores (using stebbins ppa)

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mrjayviper
Posts: 13
Joined: Sun Jul 29, 2012 9:26 am

Ubuntu 16.04.3: Handbrake not 100% of all CPU cores (using stebbins ppa)

Post by mrjayviper » Tue Oct 10, 2017 9:21 pm

edit: 1080p source

Hello. Has anyone used hanbrake recently on a linux and a windows-based setup?

I have a dual CPU Xeon (8 cores per CPU with HT) setup here with 64GB RAM. I noticed that on Windows, handbrake will run a consistent 100% on all CPU cores (including the HT ones). While on Linux, I don't see any cores running at 100%. The highest I see are at around 85% and only a few of them. and the usage seems to go up/down unlike on Windows.

Is this perhaps a limitation of the CPU governor/scheduler in Linux? I have installed the intel microcode.

In both Windows and Linux, I was using the built-in SuperHQ1080p30 Surround profile.

Here's the activity log of the currently running encoding: https://pastebin.com/raw/tFnrAm94

Any ideas on how to improve performance? Thanks

rollin_eng
Veteran User
Posts: 2819
Joined: Wed May 04, 2011 11:06 pm

Re: Ubuntu 16.04.3: Handbrake not 100% of all CPU cores (using stebbins ppa)

Post by rollin_eng » Wed Oct 11, 2017 7:17 am

Could you please post your full logs from Windows and Linux, instructions can be found here:

https://handbrake.fr/docs/en/latest/hel ... y-log.html

nhyone
Bright Spark User
Posts: 196
Joined: Fri Jul 24, 2015 4:13 am

Re: Ubuntu 16.04.3: Handbrake not 100% of all CPU cores (using stebbins ppa)

Post by nhyone » Wed Oct 11, 2017 1:55 pm

100% CPU load is one thing, but is it actually faster? Look at the final 'average fps' and see if HandBrake on Windows is truly faster than Linux.

It could be that the two OS measures load differently.

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