On Aug 20, 2013, at 12:40 PM, RoboBeans <robobe...@gmail.com> wrote:
> I can confirm that mpi program still hangs if one uses these options while
> configuring openmpi-1.7.2
>
> --enable-event-thread-support --enable-opal-multi-threads
> --enable-orte-progress-threads --enable-mpi-thread-multiple
>
>
> cd /opt
> gunzip -c openmpi-1.7.2.tar.gz | tar xf -
> cd openmpi-1.7.2
> ./configure --with-openib=/usr --with-psm=/usr --prefix=/opt/openmpi-1.7.2
> --enable-event-thread-support --enable-opal-multi-threads
> --enable-orte-progress-threads --enable-mpi-thread-multiple
> make all install
> cd ..
> chmod -R 775 openmpi-1.7.2
> ldconfig
>
Yep, sure will
> Is there any plan to support multiple threads any time soon?
Not in the immediate future, but hopefully not too far into infinity - however,
we should fix the hang in the near future, at least
>
> $ uname -r
>
> 2.6.32-358.14.1.el6.x86_64
>
>
> Thanks!
>
> On 6/19/13 12:51 PM, Hans Ekkehard Plesser wrote:
>> 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
>>>>>>
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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
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>> --
>>
>> 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
>>
>>
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