[gmx-users] Dynamic Load Balancing Crash

[Mark Abraham]

Hi,

That's definitely a bug and we would like to fix it. Can you please open an
issue at https://redmine.gromacs.org and provide enough information to
reproduce the issue (e.g. tpr files, preferably for a small part of your
replica scheme)?

Mark

On Sun, Nov 5, 2017 at 8:14 AM Daniel Kozuch <dan.kozuch at gmail.com> wrote:

> Hello,
>
> I recently started experiencing a error with GROMACS 2016.3 during a
> replica exchange simulation with 80 replicas, 480 cpus, and 40 GPUs:
>
> Assertion failed:
> Condition: comm->cycl_n[ddCyclStep] > 0
> When we turned on DLB, we should have measured cycles
>
> The simulation then crashes. I turned off DLB with the flag "-dlb no" and
> the error did not resurface so I have to assume it really is the DLB
> causing the issue.
>
> Does anyone know what might be causing this?
>
> Thanks,
> Dan
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