Which Prefs?

Questions and Answers : Preferences : Which Prefs?

To post messages, you must log in.

AuthorMessage
ALRUI

Send message
Joined: 6 Nov 09
Posts: 4
Credit: 255,696
RAC: 52
United States
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.

ID: 1041117 · Report as offensive
Profile ignorance is no excuse
Avatar

Send message
Joined: 4 Oct 00
Posts: 9529
Credit: 44,433,321
RAC: 0
Korea, North
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


In a rich man's house there is no place to spit but his face.
Diogenes Of Sinope

End terrorism by building a school

ID: 1041123 · Report as offensive
Aurora Borealis
Volunteer tester
Avatar

Send message
Joined: 14 Jan 01
Posts: 3075
Credit: 5,631,463
RAC: 0
Canada
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.

Boinc V7.2.42
Win7 i5 3.33G 4GB, GTX470

ID: 1041130 · Report as offensive
ALRUI

Send message
Joined: 6 Nov 09
Posts: 4
Credit: 255,696
RAC: 52
United States
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.

ID: 1041167 · Report as offensive
John McLeod VII
Volunteer developer
Volunteer tester
Avatar

Send message
Joined: 15 Jul 99
Posts: 24806
Credit: 754,585
RAC: 140
United States
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.




BOINC WIKI

ID: 1041368 · Report as offensive
ALRUI

Send message
Joined: 6 Nov 09
Posts: 4
Credit: 255,696
RAC: 52
United States
Message 1041455 - Posted: 12 Oct 2010, 4:36:45 UTC

Makes sense, Thank for all the input:-)

Arnold R.

ID: 1041455 · Report as offensive

Questions and Answers : Preferences : Which Prefs?


 
©2016 University of California
 
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.