Hi,
I have difficulty catching std::bac_alloc in an MPI environment. The code
is attached. I'm uisng gcc 6.3 on SUSE Linux Enterprise Server 11 (x86_64).
OpenMPI is built from source. The commands are as follows:
*Build*
g++ -I<openmpi-4.0.0-opt/include> -L<openmpi-4.0.0-opt/lib> -lmpi memory.cpp
*Run*
<openmpi-4.0.0-opt/bin/mpiexec> -n 2 a.out
*Output*
0
0
1
1
--------------------------------------------------------------------------
Primary job terminated normally, but 1 process returned
a non-zero exit code. Per user-direction, the job has been aborted.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpiexec noticed that process rank 0 with PID 0 on node cdcebus114qa05
exited on signal 9 (Killed).
--------------------------------------------------------------------------
If I uncomment the line //if (rank == 0), i.e., only rank 0 allocates
memory, I'm able to catch bad_alloc as I expected. It seems that I am
misunderstanding something. Could you please help? Thanks a lot.
Best regards,
Zhen
#include "mpi.h"
#include <iostream>
#include <vector>
#include <unistd.h>
int main( int argc, char *argv[] )
{
MPI_Init( &argc, &argv );
int rank;
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
//if (rank == 0)
{
std::vector<std::vector<double> > a(100);
for (long long i = 0; i < 100; i++)
{
std::cout << i << std::endl;
try
{
a[i].resize(1000000000);
}
catch (std::bad_alloc b)
{
std::cout << "out" << std::endl;
continue;
}
usleep(1000000);
}
}
MPI_Finalize();
return 0;
}
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