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ALRUI
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Message 1041117 - Posted: 11 Oct 2010, 15:30:22 UTC

Which preferences are used by Boinc? I see a set of computing preferences here on the website and also "Boinc Manager Preferences" within the manager. My issue seems no matter how far I ramp down CPU usage SETI application still keeps spiking CPU to 100% as viewed in the task manager.

Thanks In Advance!
Arnold R.

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Message 1041123 - Posted: 11 Oct 2010, 15:39:23 UTC - in response to Message 1041117.

the reason you see that spike is that you are not using those CPU cycles. BOINC/seti backs off when other programs are running. So seeing 100% CPU usage from Seti is common when your CPU is idle
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Message 1041130 - Posted: 11 Oct 2010, 15:53:20 UTC - in response to Message 1041117.
Last modified: 11 Oct 2010, 15:55:36 UTC

Which preferences are used by Boinc? I see a set of computing preferences here on the website and also "Boinc Manager Preferences" within the manager. My issue seems no matter how far I ramp down CPU usage SETI application still keeps spiking CPU to 100% as viewed in the task manager.

Thanks In Advance!
Arnold R.

The Boinc preferences override the web settings.

Boinc is designed to work across several OS so it can't do a smooth throttling of the CPU. This feature is design to reduce heat not to directly reduce the load of BOINC on the CPU.
example: At 90% it uses the CPU free cycles for 9 sec and turn off for 1 sec.

Your account is hidden so I can't tell what OS your using. One program I've seen mentioned on the board is TThrottle. It may be better for what you are trying to do.
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ALRUI
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Message 1041167 - Posted: 11 Oct 2010, 16:58:12 UTC - in response to Message 1041130.

I'm running Windows XP Pro in this case on a Dell Dimension 2500 (fairly old machine). If for example I limit CPU usage to 50% I will still see spikes to 100% in the task manager? Its not really a big deal more curiosity then anything else as the machine is only running SETI & my weather program (WUHU), occasionally my son will use it to play a game.

Thanks Again
Arnold R.

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Message 1041368 - Posted: 12 Oct 2010, 0:19:13 UTC - in response to Message 1041167.

I'm running Windows XP Pro in this case on a Dell Dimension 2500 (fairly old machine). If for example I limit CPU usage to 50% I will still see spikes to 100% in the task manager? Its not really a big deal more curiosity then anything else as the machine is only running SETI & my weather program (WUHU), occasionally my son will use it to play a game.

Thanks Again
Arnold R.

At 50%, it will run 100% for 1 second and 0% for 1 second. This helps dramatically with laptop cooling (even 75% CPU usage which would be 3 on and 1 off).

The BOINC polling loop runs once per second, and it is during that polling loop that the decision is made whether to run the computations the following second or not.


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ALRUI
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Message 1041455 - Posted: 12 Oct 2010, 4:36:45 UTC

Makes sense, Thank for all the input:-)

Arnold R.

Questions and Answers : Preferences : Which Prefs?

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