BUGFIX: Prevent possible deadlock in Irregular::create_atom and create_data (411c069b) · Commits · 郑智淋 / lammps

src/irregular.cpp

+6 −2

Original line number	Diff line number	Diff line
		@@ -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]);
		}