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Alan Gray

  • Registered on: 12/21/2018
  • Last connection: 10/22/2019

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Today

08:47 AM GROMACS Revision 643e75da: Enable GPU Peer Access in GPU Utilities
When using the new GPU communication features, enabling peer access
between pairs of GPUs (where supported) will allo...

10/21/2019

11:32 AM GROMACS Revision c5595a8e: GPU Coordinate PME/PP Communications
Extends PmePpCommGpu class to provide PP-side support for coordinate
transfers from either GPU or CPU to PME task, an...

10/18/2019

12:52 AM GROMACS Revision 5b594f3b: GPU Receive for PME/PP GPU Force Communications
This change extends the PME/PP GPU force communication functionality
to allow the force buffer to be recieved direct ...

10/15/2019

12:04 AM GROMACS Revision ec0aa356: PME/PP GPU Pimpl Class and GPU->CPU Communication for force buffer
Activate with GMX_GPU_PME_PP_COMMS env variable
Implements new pimpl class for PME-PP GPU communications. Performs
s...

09/26/2019

03:33 PM GROMACS Bug #3100: crash with GPU comm DD
Fix at https://gerrit.gromacs.org/c/gromacs/+/13401. @Szilard, can you just check that this also fixes your run?
02:06 PM GROMACS Bug #3100: crash with GPU comm DD
Ok, yes the previous code was also using the same for the coordinates. I don't understand why these are different - c...
11:15 AM GROMACS Bug #3100: crash with GPU comm DD
I've found the bug. It's not in the GPU halo exchange, but was introduced in
c69e061 Decouple coordinates buffer ma...

09/25/2019

11:46 PM GROMACS Bug #3100: crash with GPU comm DD
I’ve looked at it some more and there is a possibility that the above extra copy caused the run to succeed not becaus...
04:39 PM GROMACS Bug #3100: crash with GPU comm DD
It's looking like the issue is with the conditional D2H copy of nonlocal coordinate data after the X halo exchange:
...

09/24/2019

12:40 PM GROMACS Bug #3100: crash with GPU comm DD
> then there should be a sync to ensure the local X buffer ops has completed, which I think may be missing in the cod...

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