X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/cd9affe6152d6bbec19a72ea6fe26ab9407b51b7..fff5fbf696a8eaf8a7f230c4e15c763db690bcc3:/teshsuite/smpi/isp/umpire/basic-deadlock-intercomm_create.c

diff --git a/teshsuite/smpi/isp/umpire/basic-deadlock-intercomm_create.c b/teshsuite/smpi/isp/umpire/basic-deadlock-intercomm_create.c
new file mode 100644
index 0000000000..78beb4fb05
--- /dev/null
+++ b/teshsuite/smpi/isp/umpire/basic-deadlock-intercomm_create.c
@@ -0,0 +1,93 @@
+/* -*- Mode: C; -*- */
+/* Creator: Bronis R. de Supinski (bronis@llnl.gov) Fri Mar  17 2000 */
+/* no-error.c -- do some MPI calls without any errors */
+
+#include <stdio.h>
+#include "mpi.h"
+
+#define buf_size 128
+
+#define INTERCOMM_CREATE_TAG 666
+
+int
+main (int argc, char **argv)
+{
+  int nprocs = -1;
+  int rank = -1;
+  char processor_name[128];
+  int namelen = 128;
+  int buf0[buf_size];
+  int buf1[buf_size];
+  MPI_Status status;
+  MPI_Comm temp, intercomm;
+  int drank, dnprocs, rleader, rnprocs;
+
+  /* init */
+  MPI_Init (&argc, &argv);
+  MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
+  MPI_Comm_rank (MPI_COMM_WORLD, &rank);
+  MPI_Get_processor_name (processor_name, &namelen);
+  printf ("(%d) is alive on %s\n", rank, processor_name);
+  fflush (stdout);
+
+  MPI_Barrier (MPI_COMM_WORLD);
+
+  if (nprocs < 3) {
+    printf ("not enough tasks\n");
+  }
+  else {
+    /* need to make split communicator temporarily... */
+    MPI_Comm_split (MPI_COMM_WORLD, rank % 2, nprocs - rank, &temp);
+
+    if (temp != MPI_COMM_NULL) {
+      /* create an intercommunicator temporarily so can merge it... */
+      rleader = ((rank + nprocs) % 2) ?  nprocs - 2 : nprocs - 1;
+      MPI_Intercomm_create (temp, 0, MPI_COMM_WORLD, rleader,
+			    INTERCOMM_CREATE_TAG, &intercomm);
+
+      MPI_Comm_free (&temp);
+      
+      if (intercomm != MPI_COMM_NULL) {
+	MPI_Comm_size (intercomm, &dnprocs);
+	MPI_Comm_rank (intercomm, &drank);
+ 	MPI_Comm_remote_size (intercomm, &rnprocs);
+     
+	if (rnprocs > drank) {
+	  if (rank % 2) {
+	    memset (buf1, 1, buf_size);
+
+	    MPI_Recv (buf0, buf_size, MPI_INT, drank, 0, intercomm, &status);
+
+	    MPI_Send (buf1, buf_size, MPI_INT, drank, 0, intercomm);
+	  }
+	  else {
+	    memset (buf0, 0, buf_size);
+	    
+	    MPI_Recv (buf1, buf_size, MPI_INT, drank, 0, intercomm, &status);
+	
+	    MPI_Send (buf0, buf_size, MPI_INT, drank, 0, intercomm);
+	  }
+	}
+	else {
+	  printf ("(%d) Intercomm too small (lrank = %d; remote size = %d)\n",
+		  rank, drank, rnprocs);
+	}
+
+	MPI_Comm_free (&intercomm);
+      }
+      else {
+	printf ("(%d) Got MPI_COMM_NULL\n", rank);
+      }
+    }
+    else {
+      printf ("(%d) MPI_Comm_split got MPI_COMM_NULL\n", rank);
+    }
+  }
+
+  MPI_Barrier (MPI_COMM_WORLD);
+
+  MPI_Finalize ();
+  printf ("(%d) Finished normally\n", rank);
+}
+
+/* EOF */