callgrind/tests/simwork.c

   1 // Some work exercising the cache simulator
   2 // with a simple call graph
   3
   4 #include "../callgrind.h"
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #define SIZE 100000
  10
  11 double *a, *b, *c;
  12
  13 void init()
  14 {
  15    int i;
  16    for(i = 0; i< SIZE; i++) a[i] = b[i] = 1.0;
  17 }
  18
  19 void do_add()
  20 {
  21    int i;
  22    for(i = 0; i< SIZE; i++) {
  23         a[i] += 1.0;
  24         c[i] = a[i] + b[i];
  25    }
  26 }
  27
  28 double do_sum()
  29 {
  30    int i;
  31    double sum=0.0;
  32
  33    do_add();
  34    for(i = 0; i< SIZE; i++) sum += c[i];
  35
  36    return sum;
  37 }
  38
  39 double do_some_work(int iter)
  40 {
  41    double sum=0.0;
  42
  43    if (iter > 0) sum += do_some_work(iter-1);
  44    do_add();
  45    sum += do_sum();
  46
  47    return sum;
  48 }
  49
  50 int main(void)
  51 {
  52    double res;
  53
  54    a = (double*) malloc(SIZE * sizeof(double));
  55    b = (double*) malloc(SIZE * sizeof(double));
  56    c = (double*) malloc(SIZE * sizeof(double));
  57
  58    CALLGRIND_ZERO_STATS;
  59    init();
  60    res = do_some_work(1);
  61    CALLGRIND_DUMP_STATS;
  62
  63    printf("Sum: %.0f\n", res);
  64    return RUNNING_ON_VALGRIND;
  65 }
  66