Message boards : Windows : WU's too small for GPU
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Now running some 1.04 WU's, they seem to be running even smoother than the 1.02/03 WU's....
For GPU projects the cpu usage only tells BOINC Mgr how many CPU cores to reserve for the GPU tasks. It does not change how much CPU usage the gpu exe's actually consume.
An example: This will reserve 1 CPU core to do all the GPU work. If you have 8 CPU threads available then 7 CPU BOINC tasks can run. The GPUs may take 1 CPU thread each so in actuality there may only be 5 CPU threads to do 7 CPU tasks.
<app_config> <app> <name>xansons_gpu</name> <gpu_versions> <gpu_usage>0.33</gpu_usage> <cpu_usage>0.33</cpu_usage> </gpu_versions> </app> </app_config>
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It needs the two cores per GPU. This is on the Intel DP, Also it doesn't matter if it is a physical core or a logical core. It will use either, but it HAS to have 2 per GPU.
If you want to significantly reduce the CPU load in GPU tasks, you can specify:
in your app_config.xml. But this will completely freeze your screen considering that you run multiple GPU tasks in parallel. So make sure that the option to suspend GPU computing when computer is in use is selected, otherwise it will be hard even to stop the computing.
Update. This should be specified under app_version. So if you are running 4 tasks per GPU, your app_config should contain:
<app_version> <app_name>xansons_gpu</app_name> <plan_class>opencl_ati_102_windows</plan_class> <ngpus>0.25</ngpus> <cmdline>--nowait</cmdline> </app_version>
It is not necessary to specify this option for Nvidia.
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I think you missed what I was saying, but no matter.....
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Message boards :
WU's too small for GPU