[gmx-users] cuda problem
szilard.pall at cbr.su.se
Tue Jul 9 12:21:37 CEST 2013
On Tue, Jul 9, 2013 at 11:20 AM, Albert <mailmd2011 at gmail.com> wrote:
> On 07/09/2013 11:15 AM, Szilárd Páll wrote:
>> Tesla C1060 is not compatible - which should be shown in the log and
>> standard output.
> THX for kind comments.
> do you mean C1060 is not compatible with cuda-5.0 toolkit? or it is not
> compatable with Gromacs-4.6.3?I only obtained the following information in
> the log file
> 2 GPUs detected on host c0107:
> #0: NVIDIA Tesla C2075, compute cap.: 2.0, ECC: yes, stat: compatible
> #1: NVIDIA Tesla C2075, compute cap.: 2.0, ECC: yes, stat: compatible
> 2 GPUs auto-selected for this run: #0, #1
Those are not C1060-s (which is compute capability 1.3, hence not
compatible with GROMACS), but C2075-s!
> NOTE: Using a GPU with ECC enabled and CUDA driver API version <5.0, known
> cause performance loss. Switching to the alternative polling GPU wait.
> If you encounter issues, switch back to standard GPU waiting by
> the GMX_CUDA_STREAMSYNC environment variable.
As I said before, this refer to the NVIDIA driver. You can ignore
this, but you'd be better off with newer drivers.
> Non-default thread affinity set probably by the OpenMP library,
> disabling internal thread affinity
This means that either you, or the job scheduler set GOMP_CPU_
AFFINITY or KMP_AFFINITY. This may affect performance negatively, but
you'll have to try yourself.
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