I have my i7 set for home and then changed the home preferences to only use 7 processors but that didn't make any difference.

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Official Abuser of Boinc Buttons...
And no good credit hound!

I have my i7 set for home and then changed the home preferences to only use 7 processors but that didn't make any difference.

Change it to use 88% of processors instead (nearest above 7/8ths).

Set "On multiprocessors, use at most Enforced by version 6.1+" to 87%

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Set "On multiprocessors, use at most Enforced by version 6.1+" to 87%

That's too low - if you set it below 87.5%, you'll only run 6 cores.

I went into the home preference and tried 88% and 87% yet 8 are still being used. Does it need to finish the one it is on first?

12/12/2009 9:38:14 AM SETI@home Computer location: home
12/12/2009 9:38:14 AM General prefs: using separate prefs for home
12/12/2009 9:38:14 AM Reading preferences override file
12/12/2009 9:38:14 AM Preferences:
12/12/2009 9:38:14 AM max memory usage when active: 2297.34MB
12/12/2009 9:38:14 AM max memory usage when idle: 2756.81MB
12/12/2009 9:38:14 AM max disk usage: 22.57GB
12/12/2009 9:38:14 AM (to change, visit the web site of an attached project,
12/12/2009 9:38:14 AM or click on Preferences)

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Official Abuser of Boinc Buttons...
And no good credit hound!

I went into the home preference and tried 88% and 87% yet 8 are still being used. Does it need to finish the one it is on first?

12/12/2009 9:38:14 AM SETI@home Computer location: home
12/12/2009 9:38:14 AM General prefs: using separate prefs for home
12/12/2009 9:38:14 AM Reading preferences override file
12/12/2009 9:38:14 AM Preferences:
12/12/2009 9:38:14 AM max memory usage when active: 2297.34MB
12/12/2009 9:38:14 AM max memory usage when idle: 2756.81MB
12/12/2009 9:38:14 AM max disk usage: 22.57GB
12/12/2009 9:38:14 AM (to change, visit the web site of an attached project,
12/12/2009 9:38:14 AM or click on Preferences)

The messages you've shown indicate you are using local preferences, so the web preferences are being ignored.

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I went into the home preference and tried 88% and 87% yet 8 are still being used. Does it need to finish the one it is on first?

12/12/2009 9:38:14 AM SETI@home Computer location: home
12/12/2009 9:38:14 AM General prefs: using separate prefs for home
12/12/2009 9:38:14 AM Reading preferences override file
12/12/2009 9:38:14 AM Preferences:
12/12/2009 9:38:14 AM max memory usage when active: 2297.34MB
12/12/2009 9:38:14 AM max memory usage when idle: 2756.81MB
12/12/2009 9:38:14 AM max disk usage: 22.57GB
12/12/2009 9:38:14 AM (to change, visit the web site of an attached project,
12/12/2009 9:38:14 AM or click on Preferences)

The messages you've shown indicate you are using local preferences, so the web preferences are being ignored.

So do you know what I need to copy and paste into my cc_config? Is that the problem?

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Official Abuser of Boinc Buttons...
And no good credit hound!

hiamps, because of a question of you in an other thread to me.. 'Core i7 and two GPUs'.


You have 2x GTX275 in this PC?

AFAIK, from reading the forum.. no own experiences..
Core i7 - HT on/off -> ~ 15 % performance difference with CPU WUs.

If you look to the [top_host_list] you see some let run 4 other 8 threads.
If 4 threads, then the CUDA WU start is faster than with 8 threads.

I have no knowledge about the Core i7 CPU, because I don't have one.
Maybe also in the pure GPU calculation time speed up, because of higher system RAM bandwidth.

From my experiences, faster system RAM faster (pure) GPU calculation.

So you need to calculate..
HT on/off with your system.


I wouldn't let idle one CPU-Core for well GPU support if 'only' two GPUs insert.
I would use TThrottle of Fred. Small look in my -> <- (quick instruction) where you could DL.

This nice prog increase the priority of the CUDA tasks to 'normal', so only CPU tasks are disturbed if you work on the PC or other progs need CPU time.

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I went into the home preference and tried 88% and 87% yet 8 are still being used. Does it need to finish the one it is on first?

12/12/2009 9:38:14 AM SETI@home Computer location: home
12/12/2009 9:38:14 AM General prefs: using separate prefs for home
12/12/2009 9:38:14 AM Reading preferences override file
12/12/2009 9:38:14 AM Preferences:
12/12/2009 9:38:14 AM max memory usage when active: 2297.34MB
12/12/2009 9:38:14 AM max memory usage when idle: 2756.81MB
12/12/2009 9:38:14 AM max disk usage: 22.57GB
12/12/2009 9:38:14 AM (to change, visit the web site of an attached project,
12/12/2009 9:38:14 AM or click on Preferences)

The messages you've shown indicate you are using local preferences, so the web preferences are being ignored.

So do you know what I need to copy and paste into my cc_config? Is that the problem?

Not in cc_config. Go into boinc manager under the advanced tab and set your multiprocessor cpu usage to around 88-89%.

Edit: Remember to re-read your config file after them. In the messages it should "warn" you that you are not using all processors.

hiamps, because of a question of you in an other thread to me..

Core i7 and two GPUs.
You have 2x GTX275 in this PC?

AFAIK, from reading the forum.. no own experiences..
Core i7 - HT on/off -> ~ 15 % performance difference with CPU WUs.

If you look to the [top_host_list] you see some let run 4 other 8 threads.
If 4 threads, then the CUDA WU start is faster than with 8 threads.

I have no knowledge about the Core i7 CPU, because I don't have one.
Maybe also in the pure GPU calculation time speed up, because of higher system RAM bandwidth.

From my experiences, faster system RAM faster (pure) GPU calculation.

So you need to calculate..
HT on/off with your system.


I wouldn't let idle one CPU-Core for well GPU support if 'only' two GPUs insert.
I would use TThrottle of Fred. Small look in my -> <- (quick instruction) where you could DL.

This nice prog increase the priority of the CUDA tasks to 'normal', so only CPU tasks are disturbed if you work on the PC or other progs need CPU time.

I have a GTX260 and GTX275 in this machine, I will check out the throttle program and see if I can make it work. You zipped right by me yesterday in total credit!

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Official Abuser of Boinc Buttons...
And no good credit hound!

Edit: Remember to re-read your config file after them. In the messages it should "warn" you that you are not using all processors.

That would be 'Read local prefs file' - but I don't think it's necessary in this case: whenever I've used local preferences via the Manager GUI, the file is read automatically afterwards. The 'Read...' option is only there in case you edit the file externally, with notepad or something.

You could also set <ncpus>7</ncpus> in your cc_config.xml file.

If you don't have one then use notepad & put in:
<cc_config>
<options>
<ncpus>2</ncpus>
</options>
</cc_config>
Then save as cc_config.xml

You can get full details about the options for it here.

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You could also set <ncpus>7</ncpus> in your cc_config.xml file.

Please don't give advice like that. That option is for debugging, more precisely to run more tasks than you have CPUs. Just let people use the normal preferences instead. That's way easier to diagnose in case they ever have other problems.

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You could also set <ncpus>7</ncpus> in your cc_config.xml file.

If you don't have one then use notepad & put in:
<cc_config>
<options>
<ncpus>2</ncpus>
</options>
</cc_config>
Then save as cc_config.xml

You can get full details about the options for it here.

Thanks and I bookmarked that link. Right now it is acting all crazy bouncing from unit to unit so I will leave it be for now.

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Official Abuser of Boinc Buttons...
And no good credit hound!

If you use that, hiamps, and you disable Hyperthreading as you're thinking about in this thread, then you'll find that your 4 CPUs will run 7 tasks. As that is what the <ncpus> debug option is for: run more tasks than you have CPUs.

Therefore it is not a good idea to use it. <ncpus> will act as if there were N CPUs and run N tasks at once, at all times. It will override all your CPU percentage preference settings.

Might be a nice idea now, but what if you do change your Hyperthreading in 3 to 6 months time? Will you still know you set <ncpus> to emulate you have 7 CPUs? Will HAL9000 still know that?

So, before calling your future BOINC bugged and asking for help to whittle this 'over-usage' down, to eventually find out you put <ncpus> in your cc_config.xml file your self... Just don't use it.

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If you use that, hiamps, and you disable Hyperthreading as you're thinking about in this thread, then you'll find that your 4 CPUs will run 7 tasks. As that is what the <ncpus> debug option is for: run more tasks than you have CPUs.

Therefore it is not a good idea to use it. <ncpus> will act as if there were N CPUs and run N tasks at once, at all times. It will override all your CPU percentage preference settings.

Might be a nice idea now, but what if you do change your Hyperthreading in 3 to 6 months time? Will you still know you set <ncpus> to emulate you have 7 CPUs? Will HAL9000 still know that?

So, before calling your future BOINC bugged and asking for help to whittle this 'over-usage' down, to eventually find out you put <ncpus> in your cc_config.xml file your self... Just don't use it.

I haven't changed a thing in my cc_config file. I used the boinc setting you suggested for awhile and now that things are clearing up I set it back to 100%. Please post in the other thread your views on hyperthreading.

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Official Abuser of Boinc Buttons...
And no good credit hound!

You could also set <ncpus>7</ncpus> in your cc_config.xml file.

Please don't give advice like that. That option is for debugging, more precisely to run more tasks than you have CPUs. Just let people use the normal preferences instead. That's way easier to diagnose in case they ever have other problems.

I did figure the text on the page "Don't use it to limit the number of CPUs used by BOINC; use general preferences instead." would be enough warning about using that feature. I should have linked to the boinc manager manual webpage.

Admittedly having the two settings to configure for boinc on the webpage is rather confusing. At least based on the number of people that post about "I changed my cpus to 3 but it's still using 4"

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I did figure the text on the page "Don't use it to limit the number of CPUs used by BOINC; use general preferences instead." would be enough warning about using that feature.

You specified what lines needed to be set. There are people just setting up a, or adding it to an existing, cc_config.xml file without knowing or caring what it does and who will not follow any link whatsoever to a page they have to read more text on. They just don't seem to have time for all that. It must work now as they want it to, willing or unwilling.

(Edit: Not saying hiamps is one of them! :-))

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I did figure the text on the page "Don't use it to limit the number of CPUs used by BOINC; use general preferences instead." would be enough warning about using that feature.

You specified what lines needed to be set. There are people just setting up a, or adding it to an existing, cc_config.xml file without knowing or caring what it does and who will not follow any link whatsoever to a page they have to read more text on. They just don't seem to have time for all that. It must work now as they want it to, willing or unwilling.

(Edit: Not saying hiamps is one of them! :-))

Yes I am LOL! But I did listen to you.

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Official Abuser of Boinc Buttons...
And no good credit hound!

I did figure the text on the page "Don't use it to limit the number of CPUs used by BOINC; use general preferences instead." would be enough warning about using that feature.

You specified what lines needed to be set. There are people just setting up a, or adding it to an existing, cc_config.xml file without knowing or caring what it does and who will not follow any link whatsoever to a page they have to read more text on. They just don't seem to have time for all that. It must work now as they want it to, willing or unwilling.

(Edit: Not saying hiamps is one of them! :-))

Yeah. Next time I should drink coffee then make posts not the other way around. lol

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