Forgot another test source file

src/unit_tests/MPI/mpi_divergent.c

@@ -0,0 +1,82 @@
+/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
+/*
+ *  (C) 2001 by Argonne National Laboratory.
+ *      See COPYRIGHT in top-level directory.
+ */
+
+#include "mpi.h"
+#include <stdio.h>
+#include "apex.h"
+
+void foo0(int myid);
+void foo1(int myid);
+void foo2(int myid);
+void foo3(int myid);
+
+void foo0(int myid) {
+  apex_profiler_handle profiler = apex_start(APEX_NAME_STRING, (void*)__func__);
+  usleep(100);
+  apex_stop(profiler);
+  return;
+}
+
+void foo1(int myid) {
+  apex_profiler_handle profiler = apex_start(APEX_NAME_STRING, (void*)__func__);
+  usleep(100);
+  foo0(myid);
+  apex_stop(profiler);
+  return;
+}
+
+void foo2(int myid) {
+  apex_profiler_handle profiler = apex_start(APEX_NAME_STRING, (void*)__func__);
+  usleep(100);
+  foo1(myid);
+  apex_stop(profiler);
+  return;
+}
+
+void foo3(int myid) {
+  apex_profiler_handle profiler = apex_start(APEX_NAME_STRING, (void*)__func__);
+  usleep(100);
+  foo2(myid);
+  apex_stop(profiler);
+  return;
+}
+
+int main(int argc,char *argv[])
+{
+    int    namelen;
+    int    myid, numprocs;
+    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);
+    apex_init("apex_start unit test", myid, numprocs);
+    apex_set_use_screen_output(1);
+    apex_profiler_handle profiler = apex_start(APEX_NAME_STRING, (void*)__func__);
+
+    fprintf(stdout,"Process %d of %d is on %s\n", myid, numprocs, processor_name);
+    fflush(stdout);
+
+    switch(myid % 4) {
+        case 3:
+            foo3(myid);
+        case 2:
+            foo2(myid);
+        case 1:
+            foo1(myid);
+        default:
+            foo0(myid);
+            break;
+    }
+    MPI_Barrier(MPI_COMM_WORLD);
+
+    apex_stop(profiler);
+    apex_finalize();
+    MPI_Finalize();
+    apex_cleanup();
+    return 0;
+}