Does the windows CUDA BRP6 beta application still need a free CPU core to feed it
7 Apr 2015 5:35:27 UTC
Topic 198037
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It's a lot less CPU intensive (~8-16% of a core vs 33%) than the old app was; and I'm wondering if it can coexist with other CPU users any better than the old app did; or if it will still starve if it has to wait its turn for CPU time slices.
Does the windows CUDA BRP6 beta application still need a free CP
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The only way to really know - for your particular setup - is to suck it and see.
I use three types of NVIDIA GPUs - GTX550Ti, GTX650, GTX650Ti. On all of these I didn't have a free core when crunching BRP5. I actually found (with these GPUs) that leaving a core free didn't improve the GPU crunch time and actually caused the RAC to fall because of the loss of CPU tasks.
I've continued the same policy with BRP6. From what others have said, with higher end (or just 'different') GPUs, you may get a benefit by leaving a core free. I would think it could depend very much on how many concurrent tasks you are running. I am using 2x and 3x on mine.
Cheers,
Gary.
In general, CUDA applications
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In general, CUDA applications don't need a free core. It's a different story for OpenCL applications.