mpi/examples/user_datatype: add new example

mpi/examples/user_datatype/user_datatype2.c

@@ -0,0 +1,98 @@
+/* StarPU --- Runtime system for heterogeneous multicore architectures.
+ *
+ * Copyright (C) 2015-2020  Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria
+ *
+ * StarPU is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at
+ * your option) any later version.
+ *
+ * StarPU is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * See the GNU Lesser General Public License in COPYING.LGPL for more details.
+ */
+
+#include <starpu_mpi.h>
+#include "my_interface.h"
+
+#define FPRINTF(ofile, fmt, ...) do { if (!getenv("STARPU_SSILENT")) {fprintf(ofile, fmt, ## __VA_ARGS__); }} while(0)
+
+int main(int argc, char **argv)
+{
+	int rank, nodes;
+	int ret=0;
+	int compare=0;
+
+	ret = starpu_mpi_init_conf(&argc, &argv, 1, MPI_COMM_WORLD, NULL);
+	STARPU_CHECK_RETURN_VALUE(ret, "starpu_mpi_init_conf");
+	starpu_mpi_comm_rank(MPI_COMM_WORLD, &rank);
+	starpu_mpi_comm_size(MPI_COMM_WORLD, &nodes);
+
+	if (nodes < 2 || (starpu_cpu_worker_get_count() == 0))
+	{
+		if (rank == 0)
+		{
+			if (nodes < 2)
+				fprintf(stderr, "We need at least 2 processes.\n");
+			else
+				fprintf(stderr, "We need at least 1 CPU.\n");
+		}
+		starpu_mpi_shutdown();
+		return 77;
+	}
+
+	struct starpu_my_data my0 = {.d = 42 , .c = 'n'};
+	struct starpu_my_data my1 = {.d = 98 , .c = 'z'};
+
+	starpu_data_handle_t handle0;
+	starpu_data_handle_t handle1;
+
+	if (rank == 1)
+	{
+		my0.d = 0;
+		my0.c = 'z';
+	}
+
+	starpu_my_data2_register(&handle0, STARPU_MAIN_RAM, &my0);
+	starpu_my_data2_register(&handle1, -1, &my1);
+	starpu_mpi_datatype_register(handle1, starpu_my_data2_datatype_allocate, starpu_my_data2_datatype_free);
+
+	starpu_mpi_barrier(MPI_COMM_WORLD);
+
+	if (rank == 0)
+	{
+		int *compare_ptr = &compare;
+
+		starpu_task_insert(&starpu_my_data_display_codelet, STARPU_VALUE, "node0 initial value", strlen("node0 initial value")+1, STARPU_R, handle0, 0);
+		starpu_mpi_isend_detached(handle0, 1, 10, MPI_COMM_WORLD, NULL, NULL);
+		starpu_mpi_irecv_detached(handle1, 1, 20, MPI_COMM_WORLD, NULL, NULL);
+
+		starpu_task_insert(&starpu_my_data_display_codelet, STARPU_VALUE, "node0 received value", strlen("node0 received value")+1, STARPU_R, handle1, 0);
+		starpu_task_insert(&starpu_my_data_compare_codelet, STARPU_R, handle0, STARPU_R, handle1, STARPU_VALUE, &compare_ptr, sizeof(compare_ptr), 0);
+	}
+	else if (rank == 1)
+	{
+		starpu_task_insert(&starpu_my_data_display_codelet, STARPU_VALUE, "node1 initial value", strlen("node1 initial value")+1, STARPU_R, handle0, 0);
+		starpu_mpi_irecv_detached(handle0, 0, 10, MPI_COMM_WORLD, NULL, NULL);
+		starpu_task_insert(&starpu_my_data_display_codelet, STARPU_VALUE, "node1 received value", strlen("node1 received value")+1, STARPU_R, handle0, 0);
+		starpu_mpi_isend_detached(handle0, 0, 20, MPI_COMM_WORLD, NULL, NULL);
+	}
+
+	starpu_mpi_barrier(MPI_COMM_WORLD);
+	starpu_mpi_wait_for_all(MPI_COMM_WORLD);
+
+	starpu_mpi_datatype_unregister(handle0);
+	starpu_data_unregister(handle0);
+	starpu_data_unregister(handle1);
+
+	starpu_mpi_shutdown();
+
+	if (rank == 0)
+	{
+		FPRINTF(stderr, "[node 0] %s\n", compare==1?"SUCCESS":"FAILURE");
+	}
+
+	return (rank == 0) ? !compare : 0;
+}