Changes between Initial Version and Version 1 of mpich/point_to_point/demo4

Timestamp:

Jun 25, 2008, 3:51:43 PM (16 years ago)

Author:

wade

Comment:

--

mpich/point_to_point/demo4

@@ +1 @@
+= Source code =
+{{{
+/* Program:
+ *   讓 node 0 可以接受來自任何 node 的訊息
+ * History:
+ *   2008-06-24 BETA
+ */
+
+#include <stdio.h>
+#include <mpi.h>
+
+main (int argc, char **argv)
+{
+  int numprocs, myrank, i=0, buf;
+  MPI_Status status;
+  MPI_Init(&argc, &argv);
+  MPI_Comm_size(MPI_COMM_WORLD, &numprocs);
+  MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
+
+  if (myrank > 0)
+  {
+    for(i = 0; i < 5; i++)
+    {
+      buf = myrank * 100 + i;
+      MPI_Send(&buf, 1, MPI_INT, 0, i, MPI_COMM_WORLD);
+    }
+  }
+  if (myrank == 0)
+  {
+    for (i = 0; i < 5*(numprocs-1); i++)
+    {
+      MPI_Recv(&buf, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status);
+      printf("[Node %d][Tag %d] => %d\n", status.MPI_SOURCE, status.MPI_TAG, buf);
+    }
+  }
+  MPI_Finalize();
+}
+
+}}}
+
+= Result =
+[[Image(demo4-01.png)]]