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}
