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BUGFIX: Prevent possible deadlock in Irregular::create_atom and create_data

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Tim Mattox
2017-03-17 02:36:41 -04:00
parent 3a2da51a82
commit 411c069ba6
1 changed files with 6 additions and 2 deletions
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8
src/irregular.cpp
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@ -395,7 +395,9 @@ int Irregular::create_atom(int n, int *sizes, int *proclist, int sortflag)
sendmax_proc = 0;
for (i = 0; i < nsend_proc; i++) {
MPI_Send(&length_send[i],1,MPI_INT,proc_send[i],0,world);
MPI_Request tmpReq; // Use non-blocking send to avoid possible deadlock
MPI_Isend(&length_send[i],1,MPI_INT,proc_send[i],0,world,&tmpReq);
MPI_Request_free(&tmpReq); // the MPI_Barrier below marks completion
sendmax_proc = MAX(sendmax_proc,length_send[i]);
}
@ -641,7 +643,9 @@ int Irregular::create_data(int n, int *proclist, int sortflag)
sendmax_proc = 0;
for (i = 0; i < nsend_proc; i++) {
MPI_Send(&num_send[i],1,MPI_INT,proc_send[i],0,world);
MPI_Request tmpReq; // Use non-blocking send to avoid possible deadlock
MPI_Isend(&num_send[i],1,MPI_INT,proc_send[i],0,world,&tmpReq);
MPI_Request_free(&tmpReq); // the MPI_Barrier below marks completion
sendmax_proc = MAX(sendmax_proc,num_send[i]);
}