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
logs.tar.bz
Description: BZip2 compressed data
