.5 x .5 running 2 cpu

Robby1959
Robby1959
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Topic 198325

a .5 x .5 should run 1 core ? its been running 2 cores sometimes . what can be done to run one core ?

mikey
mikey
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.5 x .5 running 2 cpu

Quote:
a .5 x .5 should run 1 core ? its been running 2 cores sometimes . what can be done to run one core ?

The ".5" could be missing some decimal points, ie .5367892, meaning it could be slightly OVER the ".5" you see, resulting in 2 cores being needed to run 2 units.

Gary Roberts
Gary Roberts
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RE: a .5 x .5 should run 1

Quote:
a .5 x .5 should run 1 core ?


What exactly do you mean by this statement. Are you talking about a GPU utilization factor set to 0.5 which gives you 2 concurrent tasks on your GPU? If so, that should reserve (ie. prevent a CPU task from running on) one of your host's CPU cores. You don't seem to have any CPU tasks from Einstein and you don't seem to be attached to other BOINC projects so you actually should have all 4 cores not running work, unless you are perhaps running work for somrthing other than a BOINC project. It would help if you were to tell us exactly what you are running and what you would like to change.

Quote:
its been running 2 cores sometimes .


What has been running 2 cores? Can you please explain what you mean?

Quote:
what can be done to run one core ?


I don't understand what you mean. Do you mean run 1 CPU task? Do you mean run 1 GPU task? Do you mean prevent more than 1 core being reserved, perhaps?

Cheers,
Gary.

Snow Crash
Snow Crash
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going out on a limb ...

going out on a limb ... phrased as .5 x .5 leads me to believe you are using an app_config.xml (or less likely an app_info.xml). When BOINC is not working the way I expect it to based on my config file it typically ends up being my mistake :-)

Please copy / paste your config details here so we can help double check it is "exactly" correct. I recently managed to drop the leading < on the closing tag for cpu_usage and BOINC manager did not tell me it was broken, it just ignored it instead.

Happy crunching,
Steve

--------------------------
- Crunch, Crunch, Crunch -
--------------------------

Robby1959
Robby1959
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the settings are just in the

the settings are just in the preferences . I set both gpu types to .5 . I run the GPU only here no cpu

Gary Roberts
Gary Roberts
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OK, so you run only GPU tasks

OK, so you run only GPU tasks at Einstein.

Do you run any tasks of any description on any CPU cores?

If so, what sort of tasks are they?

If not, what does "run 1 core" or "running 2 cores" mean in your original message?

Cheers,
Gary.

Robby1959
Robby1959
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2 cpu cores are feeding 2 gpu

2 cpu cores are feeding 2 gpu work units on one graphics card , I would prefer one cpu core to run 2 gpu work units . opening up a core to run other things .

Gary Roberts
Gary Roberts
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RE: 2 cpu cores are feeding

Quote:
2 cpu cores are feeding 2 gpu work units on one graphics card , I would prefer one cpu core to run 2 gpu work units . opening up a core to run other things .


If you have set the GPU utilization factor to 0.5 in your Einstein preferences, then you have ONLY 1 CPU core being 'reserved' for GPU support duties.

If there is a second core not crunching, that's nothing to do with the 0.5 GPU utilization factor. Perhaps you have also set the different preference for BOINC to use only 75% of your CPU cores? If so, you could change that to 100% which would allow an extra core to crunch.

Another possibility is that you are not using the GPU utilization factor mechanism in your preferences at all, but have set up an app_config.xml file with inappropriate settings. Have you created an app_config.xml file in the Einstein project directory (folder)? If you have, what values did you choose for and ? If the values were 1 and 0.5 respectively, this would be reserving 2 full CPU cores for GPU task support. This is more than necessary for Einstein.

Can you please answer ALL these questions.

1. Do you use the GPU Utilization factor in your Einstein preferences?

2. Is your BOINC computing preference set to use 100% of the CPUs?

3. Have you created an app_config.xml file for the Einstein project?

4. If you have, can you paste a full copy of it in your next reply?

Cheers,
Gary.

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