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Subject:	Re: OpenMPI Problem
To:	cygwin AT cygwin DOT com
References:	<CAGKnoQA3JwziRerSGxr6Dqnxx_zgitrJ1FuRg5oFk7wuhh0GtQ AT mail DOT gmail DOT com>
From:	cyg Simple <cygsimple AT gmail DOT com>
Message-ID:	<529afec8-bbe5-19b4-8122-d610eb2a2eba@gmail.com>
Date:	Sun, 18 Dec 2016 12:52:03 -0500
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On 12/18/2016 9:55 AM, Bahadır Öncel wrote:
> Hello all!
> I've installed cygwin and openmpi successfully. I can compile and run
> mpi programs. Twist is, even the openmpi test program hello_c.c approx
> takes a minute to run. When I try in my virtual machine (linux) the
> same program takes less than a second to run.
> I've found that other users asked the same question but did not find
> any solution.

Windows itself is inherently slow.  Adding in the emulation layer slows
it even more.  So if you want to port the compiler to Windows native you
may find a bit faster execution but that may be debatable.

> Problem reports:       http://cygwin.com/problems.html
Use the above when reporting issues, even in a question.

> FAQ:                   http://cygwin.com/faq/
Since speed of execution is a frequently asked question, you might find
some tidbits in the FAQ.

And don't forget about BLODA issues.

-- 
cyg Simple

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