Just tested the fix on a Titan using JAC NPT for 2x reps for 5,000,000
steps and it seems to be working so far. Good work guys. :) I'll run the
new validation suite over the weekend.
On 7 August 2013 18:52, Ross Walker <ross.rosswalker.co.uk> wrote:
> Results so far are:
>
> On a machine with 3 x GTX-Titan - AMBER 12 + patches as of Aug 6th 2013
> with CUDA 5.0 and the latest driver v325.15 running my GTX780 validation
> which is 10 runs on each GPU of JAC NPT for 2,000,000 steps per run for a
> total of 30 runs ALL 30 runs are bitwise identical. This is compared to
> divergence occurring in 5 minutes for the older driver.
>
> So I would say a tentative - YES this does appear to fix the Titan
> problem!!!! :-)
>
> I would encourage people to help though and do some more testing (need to
> check parallel for example) and also more varied systems and perhaps
> longer runs but for now at least it looks very encouraging.
>
> I will shortly be releasing a patch for AMBER 12 that will force the code
> to quit if it detects a Titan or 780 GPU being used with a driver earlier
> than 325.15.
>
> All the best
> Ross
>
>
>
> On 8/7/13 10:30 AM, "filip fratev" <filipfratev.yahoo.com> wrote:
>
> >Hi Ross,
> >What are your in house results? Is this fix solve the Titan problem?
> >
> >Regards,
> >Filip
> >
> >
> >
> >
> >________________________________
> > From: Ross Walker <ross.rosswalker.co.uk>
> >To: AMBER Mailing List <amber.ambermd.org>
> >Cc: AMBER Developers Mailing List <amber-developers.ambermd.org>
> >Sent: Tuesday, August 6, 2013 3:01 AM
> >Subject: [AMBER] GTX-Titan / GTX780 Fix
> >
> >
> >Dear All,
> >
> >NVIDIA has just released an updated driver that is designed to address the
> >issues seen with GTX-Titan and GTX-780 cards. This has been tested
> >extensively in house but has yet to be fully tested publicly. I would
> >encourage those of you with GTX-Titan and GTX-780 cards to try installing
> >this driver and see if it addresses the issues you have been seeing with
> >those cards. I'd be interested in your feedback and also reports of
> >performance.
> >
> >The driver is here:
> >
> >http://www.nvidia.com/object/linux-display-amd64-325.15-driver.html
> >
> >I recommend using the CUDA 5.0 toolkit. A patch for CUDA 5.5 with AMBER 12
> >will be coming shortly.
> >
> >All the best
> >Ross
> >
> >/\
> >\/
> >|\oss Walker
> >
> >---------------------------------------------------------
> >| Associate Research Professor |
> >| San Diego Supercomputer Center |
> >| Adjunct Associate Professor |
> >| Dept. of Chemistry and Biochemistry |
> >| University of California San Diego |
> >| NVIDIA Fellow |
> >| http://www.rosswalker.co.uk | http://www.wmd-lab.org |
> >| Tel: +1 858 822 0854 | EMail:- ross.rosswalker.co.uk |
> >---------------------------------------------------------
> >
> >Note: Electronic Mail is not secure, has no guarantee of delivery, may not
> >be read every day, and should not be used for urgent or sensitive issues.
> >
> >
> >
> >
> >
> >
> >
> >_______________________________________________
> >AMBER mailing list
> >AMBER.ambermd.org
> >http://lists.ambermd.org/mailman/listinfo/amber
> >_______________________________________________
> >AMBER mailing list
> >AMBER.ambermd.org
> >http://lists.ambermd.org/mailman/listinfo/amber
>
>
>
> _______________________________________________
> AMBER mailing list
> AMBER.ambermd.org
> http://lists.ambermd.org/mailman/listinfo/amber
>
_______________________________________________
AMBER mailing list
AMBER.ambermd.org
http://lists.ambermd.org/mailman/listinfo/amber
Received on Wed Aug 14 2013 - 08:30:02 PDT
