[mvapich-discuss] Assertion failure

[Jeff Hammond]

Hi Martin,

ROMIO has a design requirement that it sit strictly on top of the MPI
public API and not anything specific to MPICH (from which MVAPICH is
derived).  Therefore - possible with some refactoring of your build
process - you should be able to experiment with your changes to MPI-IO
routines using an unmodified version of MVAPICH, which should make
debugging easier on the OSU folks.

If you should be able to download a stock release of MPICH and "cd
src/mpi/romio && mkdir builddir && cd builddir && ../configure
CC=${MVAPICH_MPICC}", hence you should be able to do the same with
your modified version of ROMIO without needing to have any interaction
with the MVAPICH source.  This should greatly simplify your debugging
efforts.

Best,

Jeff

On Mon, Jan 14, 2013 at 10:58 PM, Devendar Bureddy
<bureddy at cse.ohio-state.edu> wrote:
> Hi Martin
>
> We haven't seen this assertion before.  Is this happening even without
> your modifications?  Did you specify any run-time parameters?
>
> -Devendar
>
> On Mon, Jan 14, 2013 at 7:01 PM, Martin Pokorny <mpokorny at nrao.edu> wrote:
>> Hello everyone,
>>
>> I've been occasionally seeing the following assertion error under
>> mvapich2-1.9a2. The conditions leading to the failure are not clear to me
>> (I'm working on a real-time data processing system), but this failure only
>> occurs sporadically.
>>
>> Assertion failed in file
>> src/mpid/ch3/channels/mrail/src/rdma/ch3_rndvtransfer.c at line 922:
>> vc->ch.pending_r3_data == 0
>>
>> Note the I have been making some modifications to MPI-IO routines, so that
>> muddies the waters a bit, but are there any known conditions that might
>> trigger this assertion failure? Are there any configuration variables that I
>> might change to (try to) avoid this failure?
>>
>> --
>> Martin Pokorny
>> Software Engineer - Karl G. Jansky Very Large Array
>> National Radio Astronomy Observatory - New Mexico Operations
>> _______________________________________________
>> mvapich-discuss mailing list
>> mvapich-discuss at cse.ohio-state.edu
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>
>
>
> --
> Devendar
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-- 
Jeff Hammond
Argonne Leadership Computing Facility
University of Chicago Computation Institute
jhammond at alcf.anl.gov / (630) 252-5381
http://www.linkedin.com/in/jeffhammond
https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond