Re: [AMBER] pmemd cuda MPI nmropt crashes

From: Scott Le Grand <varelse2005.gmail.com>
Date: Tue, 6 Nov 2012 10:04:09 -0800

CUDA 5.0 and NMR fix checked in...

Love to know WTF wrote that code in gpu.cpp. Might want to consider a code
review policy for changes to gpu.cpp going forward - that was a really
hacky and bad...



On Tue, Nov 6, 2012 at 5:47 AM, Scott Le Grand <varelse2005.gmail.com>wrote:

> The code works at my end as well (there is a bug in the energy fas I
> expected from that suspect piece of code in gpu.cpp I found this past
> weekend which you can see by running with 4 processes) but I am not seeing
> the crash that Scott is seeing here. It almost looks like DO_PARALLEL is
> somehow not defined.
>
>
>
>
>
> On Mon, Nov 5, 2012 at 11:12 PM, Ross Walker <ross.rosswalker.co.uk>wrote:
>
>> Hey Scott,
>>
>> What compiler and MPI combination are you using here? I am trying to
>> reproduce this using the current git tree with mvapich2-1.4.1p1 and gnu
>> 4.4.5-6 with NVCC 4.2 and every works great in DPDP mode on either 1 or 2
>> GPUs. Do you have a simple repo that you see problems with?
>>
>> See: http://bugzilla.ambermd.org/show_bug.cgi?id=205
>>
>> All the best
>> Ross
>>
>>
>> On 11/5/12 11:36 PM, "Scott Brozell" <sbrozell.rci.rutgers.edu> wrote:
>>
>> >Hi Ross,
>> >
>> >Was a notice posted somewhere ?
>> >
>> >If not then please put one on the amber gpu page.
>> >It's a fair amount of work to investigate failing tests;
>> >let's spare our users the several hours of work i already spent.
>> >
>> >thanks,
>> >scott
>> >
>> >On Mon, Nov 05, 2012 at 10:29:08PM -0700, Ross Walker wrote:
>> >> Hi Scott,
>> >>
>> >> We know. Scott Le Grand and I are looking into it although other pesky
>> >> things keep getting in the way. Hope to have a fix soon along with CUDA
>> >> 5.0 support.
>> >>
>> >> For now just run single GPU if using NMROPT.
>> >>
>> >> All the best
>> >> Ross
>> >
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>>
>>
>>
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>
>
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Received on Tue Nov 06 2012 - 10:30:02 PST
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