Have you tried using a debugger to look at the resulting core file? It will probably point you right at the problem. Most likely a case of overrunning some array when #temps > 5
On Tue, Apr 15, 2014 at 10:46 AM, Oscar Mojica <o_moji...@hotmail.com>wrote: > Hello everybody > > I implemented a parallel simulated annealing algorithm in fortran. The > algorithm is describes as follows > > 1. The MPI program initially generates P processes that have rank > 0,1,...,P-1. > 2. The MPI program generates a starting point and sends it for all > processes set T=T0 > 3. At the current temperature T, each process begins to execute iterative > operations > 4. At end of iterations, process with rank 0 is responsible for collecting > the solution obatined by > 5. Each process at current temperature and broadcast the best solution of > them among all participating > process > 6. Each process cools the temperatue and goes back to step 3, until the > maximum number of temperatures > is reach > > I compiled with: mpif90 -o exe mpivfsa_version2.f > and run with: mpirun -np 4 ./exe in a single machine > > So I have 4 processes, 1 iteration per temperature and for example 15 > temperatures. When I run the program > with just 5 temperatures it works well, but when the number of > temperatures is higher than 5 it doesn't write the > ouput files and I get the following error message: > > > [oscar-Vostro-3550:06740] *** Process received signal *** > [oscar-Vostro-3550:06741] *** Process received signal *** > [oscar-Vostro-3550:06741] Signal: Segmentation fault (11) > [oscar-Vostro-3550:06741] Signal code: Address not mapped (1) > [oscar-Vostro-3550:06741] Failing at address: 0xad6af > [oscar-Vostro-3550:06742] *** Process received signal *** > [oscar-Vostro-3550:06740] Signal: Segmentation fault (11) > [oscar-Vostro-3550:06740] Signal code: Address not mapped (1) > [oscar-Vostro-3550:06740] Failing at address: 0xad6af > [oscar-Vostro-3550:06742] Signal: Segmentation fault (11) > [oscar-Vostro-3550:06742] Signal code: Address not mapped (1) > [oscar-Vostro-3550:06742] Failing at address: 0xad6af > [oscar-Vostro-3550:06740] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x364a0) > [0x7f49ee2224a0] > [oscar-Vostro-3550:06740] [ 1] /lib/x86_64-linux-gnu/libc.so.6(cfree+0x1c) > [0x7f49ee26f54c] > [oscar-Vostro-3550:06740] [ 2] ./exe() [0x406742] > [oscar-Vostro-3550:06740] [ 3] ./exe(main+0x34) [0x406ac9] > [oscar-Vostro-3550:06740] [ 4] > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f49ee20d76d] > [oscar-Vostro-3550:06742] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x364a0) > [0x7f6877fdc4a0] > [oscar-Vostro-3550:06742] [ 1] /lib/x86_64-linux-gnu/libc.so.6(cfree+0x1c) > [0x7f687802954c] > [oscar-Vostro-3550:06742] [ 2] ./exe() [0x406742] > [oscar-Vostro-3550:06742] [ 3] ./exe(main+0x34) [0x406ac9] > [oscar-Vostro-3550:06742] [ 4] > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f6877fc776d] > [oscar-Vostro-3550:06742] [ 5] ./exe() [0x401399] > [oscar-Vostro-3550:06742] *** End of error message *** > [oscar-Vostro-3550:06740] [ 5] ./exe() [0x401399] > [oscar-Vostro-3550:06740] *** End of error message *** > [oscar-Vostro-3550:06741] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x364a0) > [0x7fa6c4c6e4a0] > [oscar-Vostro-3550:06741] [ 1] /lib/x86_64-linux-gnu/libc.so.6(cfree+0x1c) > [0x7fa6c4cbb54c] > [oscar-Vostro-3550:06741] [ 2] ./exe() [0x406742] > [oscar-Vostro-3550:06741] [ 3] ./exe(main+0x34) [0x406ac9] > [oscar-Vostro-3550:06741] [ 4] > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7fa6c4c5976d] > [oscar-Vostro-3550:06741] [ 5] ./exe() [0x401399] > [oscar-Vostro-3550:06741] *** End of error message *** > -------------------------------------------------------------------------- > mpirun noticed that process rank 0 with PID 6917 on node oscar-Vostro-3550 > exited on signal 11 (Segmentation fault). > -------------------------------------------------------------------------- > 2 total processes killed (some possibly by mpirun during cleanup) > > If there is a segmentation fault in no case it must work . > I checked the program and didn't find the error. Why does the program > work with five temperatures? > Could someone help me to find the error and answer my question please. > > The program and the necessary files to run it are attached > > Thanks > > > *Oscar Fabian Mojica Ladino* > Geologist M.S. in Geophysics > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
