[mythtv-users] Cannot max out CPU usage on HLS transcode

Raymond Wagner raymond at wagnerrp.com
Mon Oct 15 16:24:57 UTC 2012


On 10/15/2012 10:49, Jim Downie wrote:
> What this shows is that the CPU core frequencies predominantly stay
> low during HLS transcode (it can go up to 4.1GHz) and the thermal
> monitors show 40 degrees C (5 degree rise from no load)

Actually, the full six-step turbo on the i7-3930K is only available when
four of the six cores are idle. Since the bus speed is 100MHz, six steps
raises it from 3.2GHz to only 3.8GHz. With all six cores active, it is
only capable of hitting 3.5GHz.

Something else to consider, what options are you encoding with? It could
very well be possible you are bottle-necked on single-threaded decoding
of the recording, and your encoders are just sitting there idle waiting
for data to operate on.


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