Abe-san,
could you please post a (ideally trimmed) version of your program so we
can try to reproduce and investigate the issue ?
Thanks,
Gilles
On 10/27/2015 12:17 PM, ABE Hiroshi wrote:
Dear All,
I have a multithread-ed program and as a next step it is reconstructing to MPI
program. The code is to be MPI / Multithread hybrid one.
The code proceeds MPI-routines as:
1. Send data by MPI_Isend with exlusive tag numbers to the other node. This is
done in ONE master thread.
2. Receive the sent data by MPI_Irecv in several threads (usually the same as
the number of CPU core) and do their jobs.
There is one main thread (main process) and one master thread and several
working threads in the code. MPI_Isend is called in the master thread.
MPI_Irecv is called in the working threads.
My problem is MPI_Wait stalls after calling MPI_Isend. MPI_Wait is called just
after MPI_Isend. Several time the routines get through, but after sending
several data MPI_Wait stalls.
Using Xcode debugger, the loop with c->c_signaled at line 70 of
opal_conidition_wait (opal/threads/condition.h) never escape.
I guess I would make something wrong. I would like to know how to find the
problem.
I would be obliged if you’d point the solution or the next direction to be
investigated for debugging.
My Environment : OSX 10.9.5, Apple LLVM 6.0 (LLVM 3.5svn), OpenMPI 1.10.0
The thread is wxThread from wxWidgets Library (3.0.2) which is a wrapper of
pthread.
OpenMPI is configure-ed : --enable-mpi-thread-multiple --enable-debug
--enable-event-debug
Please find the detail (config.log and ompi_info —all) attached in this mail.
Thank you very much in advance.
Sincerely,
ABE Hiroshi
from Tokorozawa, JAPAN
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