FWIW: the master might be much faster, if the interfaces are the issue, as you could then add “—mca oob ^tcp” to the cmd line and eliminate some of that selection time.
> On May 29, 2015, at 11:07 PM, Marco Atzeri <marco.atz...@gmail.com> wrote: > > On 5/29/2015 9:53 PM, Walt Brainerd wrote: >> It behaved this way with the Cygwin version (very recent update) >> and with 1.8.5 that I built from source. >> >> On Fri, May 29, 2015 at 12:35 PM, Ralph Castain <r...@open-mpi.org >> <mailto:r...@open-mpi.org>> wrote: >> >> I assume you mean on cygwin? Or is this an older version that >> supported native Windows? >> >> > On May 29, 2015, at 12:34 PM, Walt Brainerd >> <walt.brain...@gmail.com <mailto:walt.brain...@gmail.com>> wrote: >> > >> > On Windows, mpirun appears to take about 5 seconds >> > to start. I can't try it on Linux. Intel takes no time to >> > start executing its version. >> > >> > Is this expected? >> > > > I would say yes > > $ time mpirun -n 2 ./hello_c.exe > Hello, world, I am 0 of 2, (Open MPI v1.8.5, package: Open MPI .., ident: > 1.8.5, repo rev: v1.8.4-333-g039fb11, May 05, 2015, 127) > Hello, world, I am 1 of 2, (Open MPI v1.8.5, package: Open MPI .., ident: > 1.8.5, repo rev: v1.8.4-333-g039fb11, May 05, 2015, 127) > > real 0m2.636s > user 0m1.012s > sys 0m2.119s > > I presume is wasting some time enumerating and rejecting the > available interfaces. > On windows they have unusual names > > $ ./interface-64.exe > Interfaces (count = 10): > {EC2ABB5C-42A8-431D-A133-8F4BE0F309AF} > {9213DBB8-80C6-4316-AA7A-EBF8AD7661E1} > {8D78D8D9-CFF0-4C4A-AFC3-72CB0E275588} > {2449A164-BE1A-4393-8168-2A3EDC9AA6F0} > {97191531-3960-4C35-8D79-1851EF7EE9E0} > {6F8DABED-A5FE-4E8D-8BA1-02763080D9DC} > {2A3E9C71-E553-44D0-ABE3-327EB89C3863} > {9F4F7FD2-5E44-4796-ABE0-0785CF76C11E} > {C4069E93-6662-44BF-B363-5175A04681D5} > {846EE342-7039-11DE-9D20-806E6F6E6963} > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/05/26996.php
