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Re: [ESPResSo-users] compile espressomd for single processor

From: Henri Menke
Subject: Re: [ESPResSo-users] compile espressomd for single processor
Date: Tue, 8 Jan 2019 15:00:04 +1300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1

Hi Gil,

No, Espresso cannot be compiled without MPI.  It used to be possible up
to version 3.3.1 where there was a “mpifake” implementation to mock MPI
capabilities.  This has been removed in 4.0 [1].

Nevertheless, you can simply run Espresso without mpirun in which case
it will only use a single core, or you explicitly tell mpirun that you
only want a single core using

    mpirun -n 1 ./pypresso ...

Kind regards, Henri


On 8/01/19 2:50 PM, Gil Claudio wrote:
> Hi all,
> Is there a way to compile espresso for single processor, i.e., turning off 
> all MPI capabilities?
> Thanks.
> Gil

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