[Beowulf] mpi_comm_create scaling issue

Lawrence Stewart stewart at serissa.com
Thu Sep 5 09:20:22 PDT 2013


Are you doing this dynamically?  Could you change the code to create the necessary communicators just once at job launch time?
-L

On 2013, Sep 5, at 11:56 AM, xingqiu yuan <xingqiuyuan at gmail.com> wrote:

> Hi ALL
> 
> MPI_COMM_CREATE takes a substantial amount of time on large communicators, any good ideas to reduce the time consuming on large communicators?
> 
> regards
> 
> Xingqiu Yuan
> 
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