+/* Copyright (c) 2009-2012. The SimGrid Team. All rights reserved. */
+
+/* This example should be instructive to learn about SMPI_SAMPLE_LOCAL and
+ SMPI_SAMPLE_GLOBAL macros for execution sampling */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
#include <stdio.h>
+#include <mpi.h>
-int main(int argc, char *argv[]) {
- int i;
- double d;
- MPI_Init(&argc, &argv);
- d = 2.0;
- SMPI_DO_ONCE {
- for (i = 0; i < atoi(argv[1]); i++) {
- if (d < 10000) {
- d = d*d;
- } else {
- d = 2;
- }
- }
- printf("%d %f\n", i, d);
- }
- SMPI_DO_ONCE {
- for (i = 0; i < 2*atoi(argv[1]); i++) {
- if (d < 10000) {
- d = d*d;
- } else {
- d = 2;
- }
- }
- printf("%d %f\n", i, d);
+int main(int argc, char *argv[])
+{
+ int i,j;
+ double d;
+ MPI_Init(&argc, &argv);
+ d = 2.0;
+ for (i=0;i<5;i++) {
+ SMPI_SAMPLE_GLOBAL(3,-1) { // I want no more than 3 benchs (thres<0)
+ fprintf(stderr,"[rank:%d] Run the first computation. It's globally benched, and I want no more than 3 benchmarks (thres<0)\n", smpi_process_index());
+
+ for (j=0;j<100*1000*1000;j++) { // 100 kflop
+ if (d < 100000) {
+ d = d * d;
+ } else {
+ d = 2;
+ }
+ }
+ }
+ }
+
+ for (i=0;i<5;i++) {
+ SMPI_SAMPLE_LOCAL(0, 0.1) { // I want the standard error to go below 0.1 second. Two tests at least will be run (count is not >0)
+ fprintf(stderr,"[rank:%d] Run the first (locally benched) computation. It's locally benched, and I want the standard error to go below 0.1 second (count is not >0)\n", smpi_process_index());
+ for (j=0;j<100*1000*1000;j++) { // 100 kflop
+ if (d < 100000) {
+ d = d * d;
+ } else {
+ d = 2;
+ }
}
- MPI_Finalize();
- return 0;
+ }
+ }
+
+ fprintf(stderr,"[%d] The result of the computation is: %f\n", smpi_process_index(), d);
+
+ MPI_Finalize();
+ return 0;
}
