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+--- Thread: Cpu usage when idling (/showthread.php?tid=191412)
Cpu usage when idling - d80tb7 - 2014-04-05
Hi,
I have an atv1 running crystalbuntu and notice that xbmc is using a constant ~40% cpu when just sitting on the home screen. I know the pentium m in the apple tv isn't particularly powerful, but I'm still suprised that cpu usage is so high given that ostensibly there is so little going one.
I was wondering if one of the developers could comment as to why this might be. Note I'm not complaining- more that I'm genuinely curious as to why it's spinning cpu cycles.
thanks,
Chris
RE: Cpu usage when idling - davilla - 2014-04-05
~40% cpu at what clock percent ?
RE: Cpu usage when idling - d80tb7 - 2014-04-05
(2014-04-05, 18:56)davilla Wrote: ~40% cpu at what clock percent ?
hmm fair point, using:
Code:
sudo watch -n 1 cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freqit looks like cpu frequency is alternating between 600MHz and 1GHZ. However at the former xbmc.bin is reported as using 55% of cpu and atvclient 4%. At the latter it's more like 38%.
I suppose from my, probably naive, point of view I'm just surprised that it's even using this when just displaying the home screen.
RE: Cpu usage when idling - davilla - 2014-04-05
The home page is not a static picture, it's being drawn over and over. We call that being rendered as it is composed of many sink elements.
RE: Cpu usage when idling - Ned Scott - 2014-04-06
What skin are you using? My ATV1 + Crystalbuntu shows about 5% or less CPU usage for XBMC when on the home screen of Amber or Confluence (RSS feed off, no skin widgets/shelf items being refreshed, etc).