compiler-rt/test/tsan/bench.h

   1 #include "test.h"
   2 #include <time.h>
   3
   4 int bench_nthread;
   5 int bench_niter;
   6 int bench_mode;
   7
   8 void bench();  // defined by user
   9 void start_thread_group(int nth, void(*f)(int tid));
  10
  11 int main(int argc, char **argv) {
  12   bench_nthread = 2;
  13   if (argc > 1)
  14     bench_nthread = atoi(argv[1]);
  15   bench_niter = 100;
  16   if (argc > 2)
  17     bench_niter = atoi(argv[2]);
  18   if (argc > 3)
  19     bench_mode = atoi(argv[3]);
  20
  21   timespec tp0;
  22   clock_gettime(CLOCK_MONOTONIC, &tp0);
  23   bench();
  24   timespec tp1;
  25   clock_gettime(CLOCK_MONOTONIC, &tp1);
  26   unsigned long long t =
  27       (tp1.tv_sec * 1000000000ULL + tp1.tv_nsec) -
  28       (tp0.tv_sec * 1000000000ULL + tp0.tv_nsec);
  29   fprintf(stderr, "%llu ns/iter\n", t / bench_niter);
  30   fprintf(stderr, "DONE\n");
  31 }
  32
  33 void start_thread_group(int nth, void(*f)(int tid)) {
  34   pthread_t *th = (pthread_t*)malloc(nth * sizeof(pthread_t));
  35   for (int i = 0; i < nth; i++)
  36     pthread_create(&th[i], 0, (void*(*)(void*))f, (void*)(long)i);
  37   for (int i = 0; i < nth; i++)
  38     pthread_join(th[i], 0);
  39 }