[gmx-users] cpu threads in a gpu run
pall.szilard at gmail.com
Thu Jul 12 16:31:28 CEST 2018
On Mon, Jul 9, 2018 at 12:43 PM Mahmood Naderan <nt_mahmood at yahoo.com>
> When I run "-nt 16 -nb cpu", I see nearly 1600% cpu utilization.
You request the CPU to do the work, so all cores are fully utilized.
> However, when I run "-nt 16 -nb gpu", I see about 600% cpu utilization.
The default behavior is to offload if there is a GPU and if your GPU is not
fast enough to finish the work offloaded by default, you'll have imbalance
and the CPU will wait.
> Is there any reason about that? I want to know with the cpu threads in a
> gpu run is controllable.
See the documentation.
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