[gmx-users] cpu threads in a gpu run

[Szilárd Páll]

On Tue, Jul 10, 2018 at 5:12 AM Mahmood Naderan <nt_mahmood at yahoo.com>
wrote:

> No idea? It seems to be odd. At the beginning of run, I see
>
> NOTE: GROMACS was configured without NVML support hence it can not exploit
>       application clocks of the detected Quadro M2000 GPU to improve
> performance.
>       Recompile with the NVML library (compatible with the driver used) or
> set application clocks manually.
>
>
> Is the behavior I see, related to this note? I doubt, but if someone has a
> comment, I appreciate that.
>
>
No, that just notes that the so-called "Application clocks" feature of
NVIDIA GPUs can be used to set a higher than default clock rate on the GPU
which in the majority of the cases improves performance.


>
> Regards,
> Mahmood
>
>     On Monday, July 9, 2018, 3:13:20 PM GMT+4:30, Mahmood Naderan <
> nt_mahmood at yahoo.com> wrote:
>
>  Hi,
> When I run "-nt 16 -nb cpu", I see nearly 1600% cpu utilization. However,
> when I run "-nt 16 -nb gpu", I see about 600% cpu utilization. Is there any
> reason about that? I want to know with the cpu threads in a gpu run is
> controllable.
>
>
> Regards,
> Mahmood
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