I can confirm that
--enable-event-thread-support --enable-opal-multi-threads
--enable-orte-progress-threads --enable-mpi-thread-multiple
worked for me as well under OSX 10.8.4 with clang. The orte-progress flag is
needed, without it the parallel process hangs.
I will report this to the MacPorts people so they can fix it.
Best,
Hans
On 19. juni 2013, at 15.08, Ralph Castain wrote:
> While I'm glad it worked, having it depend on orte progress thread wasn't
> done by intent, hence the comment in the configure help output. I'm not
> seeing any problems with using that option, but please let us know if you run
> into something. It hasn't been as fully tested as we'd like.
>
>
> On Jun 19, 2013, at 12:10 AM, Elias Rudberg <elias.rudb...@it.uu.se> wrote:
>
>> This has now been solved.
>>
>> The solution (as suggested by Ralph) is to use the following four configure
>> options together:
>> ./configure --enable_event_thread_support --enable_opal_multi_threads
>> --enable_orte_progress_threads --enable_mpi_thread_multiple
>>
>> So, apparently the --enable_mpi_thread_multiple option cannot be used by
>> itself, it must be combined with the other three options, otherwise
>> MPI_Init_thread will hang.
>>
>> / Elias
>>
>>
>> Quoting Elias Rudberg <elias.rudb...@it.uu.se>:
>>
>>> Hi,
>>>
>>> I now tried using --enable-opal-multi-threads (I added an "s" in the end,
>>> since "--enable-opal-multi-thread" was not recognized by the configure
>>> script).
>>>
>>> However, my test code still hangs in the same way as before.
>>>
>>> To be clear, I now configure like this:
>>> ./configure --enable-mpi-thread-multiple --enable-opal-multi-threads
>>>
>>> but the problem remains: MPI_Init_thread still hangs when trying to run the
>>> test case with -np 2.
>>>
>>> Any other ideas?
>>> Are there other configure options that must be used together with
>>> --enable-mpi-thread-multiple to make it work?
>>>
>>> Best regards,
>>> Elias
>>>
>>>
>>> Quoting Ralph Castain <r...@open-mpi.org>:
>>>
>>>> Hmmm...well, your code runs fine for me:
>>>>
>>>> Ralphs-iMac:mpi rhc$ mpirun -n 2 ./thread_init
>>>> Calling MPI_Init_thread...
>>>> Calling MPI_Init_thread...
>>>> MPI_Init_thread returned, provided = 3
>>>> MPI_Init_thread returned, provided = 3
>>>> Ralphs-iMac:mpi rhc$
>>>>
>>>> I think the key, however, is that you also have to configure with
>>>> --enable-opal-multi-thread.
>>>>
>>>>
>>>> On Jun 16, 2013, at 8:54 AM, Elias Rudberg <elias.rudb...@it.uu.se> wrote:
>>>>
>>>>> Hello!
>>>>>
>>>>> I would like to report what seems to be a bug in MPI_Init_thread in
>>>>> OpenMPI 1.7.1.
>>>>>
>>>>> The bug can be reproduced with the following test program
>>>>> (test_mpi_thread_support.c):
>>>>> ===========================================
>>>>> #include <mpi.h>
>>>>> #include <stdio.h>
>>>>> int main(int argc, const char* argv[]) {
>>>>> int provided = -1;
>>>>> printf("Calling MPI_Init_thread...\n");
>>>>> MPI_Init_thread(NULL, NULL, MPI_THREAD_MULTIPLE, &provided);
>>>>> printf("MPI_Init_thread returned, provided = %d\n", provided);
>>>>> MPI_Finalize();
>>>>> return 0;
>>>>> }
>>>>> ===========================================
>>>>>
>>>>> When trying to run this when OpenMPI was configured with
>>>>> --enable-mpi-thread-multiple, the program hangs when trying to run using
>>>>> anything more than one process.
>>>>>
>>>>> Steps I use to reproduce this in Ubuntu:
>>>>>
>>>>> (1) Download openmpi-1.7.1.tar.gz
>>>>>
>>>>> (2) Configure like this:
>>>>> ./configure --enable-mpi-thread-multiple
>>>>>
>>>>> (3) make
>>>>>
>>>>> (4) Compile test program like this:
>>>>> mpicc test_mpi_thread_support.c
>>>>>
>>>>> (5) Run like this:
>>>>> mpirun -np 2 ./a.out
>>>>> Then you see the following two lines of output:
>>>>> Calling MPI_Init_thread...
>>>>> Calling MPI_Init_thread...
>>>>> And then it hangs.
>>>>>
>>>>> MPI_Init_thread did not hang in earlier OpenMPI versions (for example it
>>>>> worked in 1.5.* and 1.6.*), so it seems like a bug introduced in 1.7.
>>>>>
>>>>> The description above shows how I reproduce this in Ubuntu on my local
>>>>> desktop computer, but the same problem exists for the OpenMPI 1.7.1
>>>>> installation at the UPPMAX computer center where I wan to run my code in
>>>>> the end. I don't know all details about how they installed it there, but
>>>>> I know they set --enable-mpi-thread-multiple. So maybe it hangs in 1.7.1
>>>>> on any computer as long as you use MPI_THREAD_MULTIPLE. At least I have
>>>>> not seen it work anywhere.
>>>>>
>>>>> Do you agree that this is a bug, or am I doing something wrong?
>>>>>
>>>>> Best regards,
>>>>> Elias
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> users mailing list
>>>>> us...@open-mpi.org
>>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>>
>>>>
>>>> _______________________________________________
>>>> users mailing list
>>>> us...@open-mpi.org
>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>
>
> _______________________________________________
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
--
Dr. Hans Ekkehard Plesser, Associate Professor
Head, Basic Science Section
Dept. of Mathematical Sciences and Technology
Norwegian University of Life Sciences
PO Box 5003, 1432 Aas, Norway
Phone +47 6496 5467
Fax +47 6496 5401
Email hans.ekkehard.ples...@umb.no
Home http://arken.umb.no/~plesser
