[mythtv-users] Mythfrontend idle cpu consumption help

Jarod Wilson jarod at wilsonet.com
Wed Nov 18 23:09:50 UTC 2009

On Nov 18, 2009, at 5:46 PM, Michael T. Dean wrote:

> On 11/18/2009 05:37 PM, jansenj wrote:
>>> Since you seem to be using CPU frequency scaling, if you're using an AMD
>>> processor, frequency scaling may decrease the memory speed/bandwidth, which
>>> could artificially increase the CPU usage.  Can you test it with the
>>> governor set to Performance?
>> As I think I said before, I think this almost seems like a "busy wait"
>> somewhere.  Because when I told my cpu to go to 2Ghz, it STILL utilized
>> 14%.  Something is consuming ~130ms of time every second almost regardless
>> of CPU speed.
> Yes, there's a very tight select/poll loop in Qt's event dispatcher for *nix systems that can be hit in some circumstances.  But it's all just a "wait for something" loop, so it doesn't really affect anything else running on the system (as it's fine waiting while something else runs or while the loop runs).

I've paid zero attention to this thread, but is this possibly relevant?:


Jarod Wilson
jarod at wilsonet.com

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