X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/f39fbe7b55f83e16713c1669a09dc55f85731e8e..3a6ab425e9bac068b1f95bf690400f63f5290093:/examples/smpi/allreduce.c

diff --git a/examples/smpi/allreduce.c b/examples/smpi/allreduce.c
new file mode 100644
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+++ b/examples/smpi/allreduce.c
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+#include <stdio.h>
+#include <mpi.h>
+
+/**
+ * MESSAGE PASSING INTERFACE TEST CASE SUITE
+ *
+ * Copyright IBM Corp. 1995
+ * 
+ * IBM Corp. hereby grants a non-exclusive license to use, copy, modify, and
+ *distribute this software for any purpose and without fee provided that the
+ *above copyright notice and the following paragraphs appear in all copies.
+
+ * IBM Corp. makes no representation that the test cases comprising this
+ * suite are correct or are an accurate representation of any standard.
+
+ * In no event shall IBM be liable to any party for direct, indirect, special
+ * incidental, or consequential damage arising out of the use of this software
+ * even if IBM Corp. has been advised of the possibility of such damage.
+
+ * IBM CORP. SPECIFICALLY DISCLAIMS ANY WARRANTIES INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS AND IBM
+ * CORP. HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
+ * ENHANCEMENTS, OR MODIFICATIONS.
+ * ***************************************************************************
+ **/
+int ibm_test(int rank, int size)
+{
+	  int success = 1;
+#define MAXLEN  10000
+
+	  int root, i, j, k;
+	  int out[MAXLEN];
+	  int in[MAXLEN];
+
+	  for (j = 1; j <= MAXLEN; j *= 10) {
+		    for (i = 0; i < j; i++)
+				out[i] = i;
+
+		    MPI_Allreduce(out, in, j, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
+		    MPI_Barrier(MPI_COMM_WORLD);
+
+		    if (rank == root) {
+				for (k = 0; k < j; k++) {
+					  if (in[k] != k * size) {
+						    printf("bad answer (%d) at index %d of %d (should be %d)", in[k], k,
+									  j, k * size);
+						    success = 0;
+						    break;
+					  }
+				}
+		    }
+	  }
+	  return (success);
+}
+
+
+
+
+int main(int argc, char **argv)
+{
+  int size, rank;
+
+
+  MPI_Init(&argc, &argv);
+  MPI_Comm_size(MPI_COMM_WORLD, &size);
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+
+
+  if (0 == rank)
+    printf("** IBM Test Result: ... \n");
+  if (!ibm_test(rank, size))
+    printf("\t[%d] failed.\n", rank);
+  else
+    printf("\t[%d] ok.\n", rank);
+
+  MPI_Finalize();
+  return 0;
+}