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Does increasing the number of CPU cores contribute to faster simulation performance in this case?

Hi,

I’m currently using the GPU CUDA solver in EDEM and was wondering — does increasing the number of CPU cores contribute to faster simulation performance in this case? Also, are there any recommended ways to significantly improve the simulation speed? Any suggestions would be greatly appreciated.

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Accepted answers

Stephen Cole

Hi Nathen,

CPU's don't really influence the simulation speed if running on GPU. Typically we recommend using 4 CPU's with a GPU however all the computational effort is spent on the GPU.

For more input on simulation speed:

https://community.altair.com/discussion/33639/edem-simulation-run-time

Regards

Stephen

Stephen Cole

CUDA solver is faster than CPU in nearly all scenarios.

You see a greater benefit of GPU with larger numbers of particles (1 million +) however I still use GPU for smaller numbers of particles (e.g. 1000- 10,000) as its still faster than CPU, just the difference in speed is not as great. I'm not sure where the CPU benefit over GPU cross-over is, if the simulation is a few hundred particles I would run on CPU.

Regards

Stephen

All comments

Stephen Cole

Hi Nathen,

CPU's don't really influence the simulation speed if running on GPU. Typically we recommend using 4 CPU's with a GPU however all the computational effort is spent on the GPU.

For more input on simulation speed:

https://community.altair.com/discussion/33639/edem-simulation-run-time

Regards

Stephen

Nathen

https://community.altair.com/discussion/comment/192714#Comment_192714

So, when should I use the GPU CUDA solver, and when should I stick with the CPU solver?

Stephen Cole

CUDA solver is faster than CPU in nearly all scenarios.

Regards

Stephen