examples to demonstrate bugs in sendrecv

[simgrid.git] / examples / smpi / sendrecv.c

diff --git a/examples/smpi/sendrecv.c b/examples/smpi/sendrecv.c
new file mode 100644 (file)
index 0000000..7b11ce0
--- /dev/null
+++ b/examples/smpi/sendrecv.c
@@ -0,0 +1,26 @@
+#include "mpi.h"
+#include <stdio.h>
+ 
+int main(int argc, char *argv[])
+{
+#define TAG_RCV 998
+#define TAG_SND 999
+    int myid, numprocs, left, right;
+    int buffer[10], buffer2[10];
+    MPI_Request request;
+    MPI_Status status;
+ 
+    MPI_Init(&argc,&argv);
+    MPI_Comm_size(MPI_COMM_WORLD, &numprocs);
+    MPI_Comm_rank(MPI_COMM_WORLD, &myid);
+ 
+    right = (myid + 1) % numprocs;
+    left = myid - 1;
+    if (left < 0)
+        left = numprocs - 1;
+ 
+    MPI_Sendrecv(buffer, 10, MPI_INT, left, TAG_SND, buffer2, 10, MPI_INT, right, TAG_RCV, MPI_COMM_WORLD, &status);
+ 
+    MPI_Finalize();
+    return 0;
+}