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From: Tim Campbell (tim.campbell_at_[hidden])
Date: 2007-01-11 09:26:35


Thanks. I'll try it out when the appropriate revision shows up in
the tar list.
~Tim

On Jan 11, 2007, at 2:48 AM, George Bosilca wrote:

> Tim,
>
> Thanks for the bug report. I just commit a patch in our development
> version (revision 13079). It will go into the 1.2b2 soon, after some
> soak time. Until then please use the latest nightly tar (with a
> version bigger than 13079) from our website.
>
> Thanks,
> george.
>
> On Jan 10, 2007, at 5:19 PM, Tim Campbell wrote:
>
>> Greetings,
>>
>> Attached is a small test fortran program that triggers a failure in
>> the mpi_waitall. The problem is that the after a couple of calls
>> to mpi_startall and mpi_waitall some of the mpi_requests become
>> corrupted. This causes the next call to mpi_startall to fail.
>> Here is output from a 2 cpu run.
>>
>> [44]% mpif90 -g test_ompi.f
>> [45]% mpirun -np 2 a.out
>> TEST(A): 0 1 | 2 3 4 5
>> TEST(B): 0 1 | 2 3 4 5
>> OUTPUT: 0 1 | 100 100 101 101
>> TEST(A): 0 2 | 2 3 4 5
>> TEST(B): 0 2 | -32766 -32766 4 5
>> OUTPUT: 0 2 | 200 200 201 201
>> TEST(A): 1 1 | 2 3 4 5
>> TEST(B): 1 1 | 2 3 4 5
>> OUTPUT: 1 1 | 101 101 100 100
>> TEST(A): 1 2 | 2 3 4 5
>> TEST(B): 1 2 | -32766 -32766 4 5
>> OUTPUT: 1 2 | 201 201 200 200
>> ^Cmpirun: killing job...
>>
>> The "-32766" values show up in the mpi_request array after the
>> second call to mpi_waitall. Using prints in the OpenMPI code I
>> have tracked the problem to
>>
>> ompi/request/req_wait.c:ompi_request_wait_all().
>>
>> I find upon entry to ompi_request_wait_all() that the values of
>> request[:]->req_f_to_c_index are valid. However, upon exit of
>> ompi_request_wait_all() the first two entries of request[:]-
>>> req_f_to_c_index have the value of -32766.
>>
>> I am testing with OpenMPI version 1.2b2. This problem occurs on
>> both x86_64 and Intel i386 and it occurs for both Portland Group
>> compilers and for GCC/G95.
>>
>> Cheers,
>> Tim Campbell
>> Naval Research Laboratory
>> <test_ompi.f.gz>
>>
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