[gmx-developers] performance 4.6.3 vs 5.0rc1

[Szilárd Páll]

The source is me - and I develop the CUDA kernels so I do test
compilers and drivers regularly and quite extensively. Feel free to
verify the claim though, for reference here are a few numbers you
should be able to reproduce ;)
http://goo.gl/y9Kz4P

Note that the performance bug has been reported to NVIDIA and resolved in 6.5.

Cheers,
--
Szilárd

On Fri, Jun 27, 2014 at 4:14 PM, Vedran Miletić <rivanvx at gmail.com> wrote:
> 2014-06-27 14:29 GMT+02:00 Szilárd Páll <pall.szilard at gmail.com>:
>> Thanks for checking! FYI CUDA 6.0 does have performance regressions,
>> but luckily on Kepler hardware the difference is quite small (<=5% in
>> the kernel and AFAIR only on CC 3.0), but on Fermi it can be up to
>> 15%.
>>
>> Note to self and to reviewers/documentation writers: I/we should note
>> this somewhere in the docs.
>>
>> Cheers,
>> --
>> Szilárd
>
> Szilard,
>
> do you have any source for that claim, or is this your experience? I
> can only find a thread at NVIDIA forums [1].
>
> Regards,
> Vedran
>
> [1] https://devtalk.nvidia.com/default/topic/745471/cuda-6-0-performance-drop-comparing-to-5-5/
> --
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