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Re: [ESPResSo-users] Boltzmann swimmers on GPUs

From: Martin Kaiser
Subject: Re: [ESPResSo-users] Boltzmann swimmers on GPUs
Date: Mon, 6 May 2019 12:03:46 +0200

Thanks Henri, ill give it a close look.

> On 06.05.2019, at 12:01, Henri Menke <address@hidden> wrote:
> Dear Martin,
> The swimmers only work on a single MPI node with CPU LB because otherwise
> another ghost layer would be required.  Back when we implemented the swimmers
> for CPU LB we only did so for verification purposes.  Since the GPU LB is
> orders of magnitude faster, this should always be the preferred 
> implementation.
> However, the GPU LB is limited to a single GPU as a whole.
> There is also a tutorial on active matter which you can find in the source 
> tree
> or at
> Kind regards,
> Henri
> On 6/05/19 9:44 PM, Martin Kaiser wrote:
>> Hello everybody, quick question,
>> I am not sure that I interpret the documentation correctly and couldn’t seem 
>> to find a satisfying answer in the source code.
>> It is stated that Lattice-Boltzmann swimmers are ”only supported on one Open 
>> MPI node”. As this does not point to GPU nodes, do I understand correctly 
>> that Lattice-Boltzmann swimmers are functional with the CUDA implementation 
>> of LB??
>> Thanks for the help,
>> Martin

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