[mpich-discuss] MPI_THREAD_MULTIPLE

[Lubomir Radev]

Yes. I was using 1.0.8p1 originally, but after your suggestion got 1.1.1p1 and the problem persists.

I could reduce my code to a test case exhibiting the issue, but I need to understand why MPI_Init_thread() won't provide me with MPI_THREAD_MULTIPLE support and always returns MPI_THREAD_SINGLE regardless of the channel configuration. I need to get that working first so my multi-threaded code can assume it operates in a correctly initialized environment and can legitimately call into MPICH2 simultaneously from more than one thread.

I'm using Boost.MPI wrapper (and Boost.Thread), but that shouldn't matter.

Thanks


________________________________
From: Jayesh Krishna <jayesh at mcs.anl.gov>
To: mpich-discuss at mcs.anl.gov
Sent: Friday, September 18, 2009 8:42:38 AM
Subject: Re: [mpich-discuss] MPI_THREAD_MULTIPLE


Hi,
 Are you trying the latest stable release, 1.1.1p1, of MPICH2 (http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads) ?
 Can you send us a test program ?

Regards,
Jayesh

-----Original Message-----
From: mpich-discuss-bounces at mcs.anl.gov [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Lubomir Radev
Sent: Thursday, September 17, 2009 10:08 PM
To: mpich-discuss at mcs.anl.gov
Subject: [mpich-discuss] MPI_THREAD_MULTIPLE

Hey guys,

I need to call into the thread-safe version of MPICH2 so I tried to initialize with MPI_Init_thread() and MPI_THREAD_MULTIPLE, but no matter how I configured the channels on my nodes - tried both mt and nemesis - that function returns MPI_THREAD_SINGLE as provided thread support.

I'm using 1.0.8p1 on Windows if that matters. Installed from the provided MSI binary. Perhaps I need to build from sources, configuring it with thread support?

Thanks
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