first commit to add the mpich-test suite to smpi tesh suite. Obviously all tests...

[simgrid.git] / teshsuite / smpi / mpich-test / coll / allredmany.c

diff --git a/teshsuite/smpi/mpich-test/coll/allredmany.c b/teshsuite/smpi/mpich-test/coll/allredmany.c
new file mode 100644 (file)
index 0000000..9d6b283
--- /dev/null
+++ b/teshsuite/smpi/mpich-test/coll/allredmany.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include "mpi.h"
+#include "test.h"
+
+/*
+ * This example should be run with 2 processes and tests the ability of the
+ * implementation to handle a flood of one-way messages.
+ */
+
+int main( int argc, char **argv )
+{
+  double wscale = 10.0, scale;
+  int numprocs, myid,i,namelen;
+  char processor_name[MPI_MAX_PROCESSOR_NAME];
+
+  MPI_Init(&argc,&argv);
+  MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
+  MPI_Comm_rank(MPI_COMM_WORLD,&myid);
+  MPI_Get_processor_name(processor_name,&namelen);
+
+  /* fprintf(stderr,"Process %d on %s\n",
+          myid, processor_name); */
+  for ( i=0; i<10000; i++) {
+    MPI_Allreduce(&wscale,&scale,1,MPI_DOUBLE,MPI_SUM,MPI_COMM_WORLD);
+  }
+  MPI_Finalize();
+  return 0;
+}