SETI not using all my CPUs


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Questions and Answers : Windows : SETI not using all my CPUs

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Rey Mennitto
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Message 1343861 - Posted: 7 Mar 2013, 22:14:26 UTC

I've been running SETI since the `90's and this is the first time that SETI will not use all 4 of my CPU's. I have a quad system and a compatible graphics card. Usually I see 4 tasks running, one on each core, and another task running, if available, on my graphics GPU. I have not changed what is typically running on my system and I run it 24/7. If I run another app, such as Rosetta or World Community Grid, all 4 CPUs are used.

Any thoughts would be appreciated.

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Message 1343894 - Posted: 7 Mar 2013, 23:36:48 UTC - in response to Message 1343861.
Last modified: 7 Mar 2013, 23:38:04 UTC

If you're running multiple projects, BOINC could be trying to balance your resource share allocations.

If you're only running SETI, be sure your preferences are set to "on multiprocessor systems, use" 100% "of the processors". Note this setting MIGHT slow down your GPU processing.
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Rey Mennitto
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Message 1344170 - Posted: 8 Mar 2013, 20:03:44 UTC

I just noticed that one of my SETI work units is running on my GPU but none are running on any of my CPU's.

In an earlier post, I was told there are discrete CPU and GPU work units so I suspect I may just have a bunch of GPU work units downloaded and waiting to run and no CPU work units.

How can you tell if a work unit is for the CPU or for the GPU?

Thanks again.

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Message 1344217 - Posted: 8 Mar 2013, 21:44:59 UTC - in response to Message 1344170.

How can you tell if a work unit is for the CPU or for the GPU?

Look in Application column (Sort by it and of course resize it to see all the text):
http://setiathome.berkeley.edu/forum_thread.php?id=64710&postid=1124286#1124286


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Rey Mennitto
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Message 1344268 - Posted: 8 Mar 2013, 23:59:13 UTC

All that tells me is which project the work unit is from, I understand that and I can see that. Both the CPU and GPU projects that I'm speaking about are from SETI. I want to know which is for the CPU and which is for the GPU.

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Message 1344300 - Posted: 9 Mar 2013, 2:16:02 UTC - in response to Message 1344268.

All that tells me is which project the work unit is from, I understand that and I can see that. Both the CPU and GPU projects that I'm speaking about are from SETI. I want to know which is for the CPU and which is for the GPU.


Advanced View, Tasks tab, Application column. CPU=6.03, GPU=6.09 or 6.10 depending on GPU type.
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Message 1344311 - Posted: 9 Mar 2013, 2:42:20 UTC - in response to Message 1344268.

It helps if you know that your GPU is CUDA capable. Thus the applications showing (cuda_fermi) will run on your GPU.
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Message 1344329 - Posted: 9 Mar 2013, 3:41:30 UTC - in response to Message 1344268.
Last modified: 9 Mar 2013, 3:50:20 UTC

All that tells me is which project the work unit is from, ...

It shows the Application name, not the project (it is coincidence that sometimes the Application name contains the name of the project but not always)

Similar Application names are shown on the web:

the Application names "SETI@home Enhanced v6.10 (cuda_fermi)" and "SETI@home Enhanced v6.03":
http://setiathome.berkeley.edu/results.php?hostid=6856975&offset=0&show_names=0&state=0&appid=2

the Application names "AstroPulse v6 v6.04 (opencl_nvidia_100)", "AstroPulse v6 v6.04 (cuda_opencl_100)", "AstroPulse v6 v6.01" (all from SETI@home but do not contain the name of the project):
http://setiathome.berkeley.edu/results.php?hostid=6856975&offset=0&show_names=0&state=0&appid=12


Example from another project:
on Asteroids@home
http://asteroidsathome.net/boinc/

the Application name is "Period Search Application v100.00":
http://asteroidsathome.net/boinc/results.php?hostid=110


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Rey Mennitto
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Message 1345554 - Posted: 11 Mar 2013, 21:25:31 UTC

I see the cuda_fermi, so that answers that, all the tasks that I have in my queue are cuda_fermi. Thanks for the help.
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Message 1354448 - Posted: 7 Apr 2013, 17:49:17 UTC - in response to Message 1343861.

Got similiar problems with BOINC (SETI) running at Intel I7-520 (8 virtual CPU Cores, 4 physically cores), 6 GB RAM (2GB in 3 Banks, fast Triple-Mode), OS: Windows 7 64 Bit OEM-Version fr. Microsoft.

I was setting up all conditions in boinc|assist|options to maximum Ressource-Usage (GPU and CPU using while working, 100 Percent on all).

Observed via Windows Task Manager my System needed up 2 Minutes to reach maximum count of core-using and 100 percent cpu-using.

Why this takes so much time? A little bit more "aggressive" behaviour of Boing Client vs. Windows would be nice.

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Message 1354463 - Posted: 7 Apr 2013, 18:39:49 UTC

There is a lot of discussion, and help, on these problems in the Number Crunching part of the forum (http://setiathome.berkeley.edu/forum_forum.php?id=10). I suggest you head over there and have a read around.
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Questions and Answers : Windows : SETI not using all my CPUs

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