libgomp/testsuite/libgomp.c/omp_alloc-3.c

   1 /* { dg-do run } */
   2
   3 /* Stress-test omp_alloc/omp_malloc under concurrency.  */
   4
   5 #include <omp.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #pragma omp requires dynamic_allocators
  10
  11 #define N 1000
  12
  13 void
  14 test (omp_allocator_handle_t allocator)
  15 {
  16   #pragma omp target map(to:allocator)
  17   {
  18     #pragma omp parallel for
  19     for (int i = 0; i < N; i++)
  20       for (int j = 0; j < N; j++)
  21         {
  22           int *p = omp_alloc (sizeof (int), allocator);
  23           omp_free (p, allocator);
  24         }
  25   }
  26 }
  27
  28 int
  29 main ()
  30 {
  31   /* omp_low_lat_mem_alloc doesn't actually get low-latency memory on GPU.  */
  32   omp_alloctrait_t traits[1] = { { omp_atk_access, omp_atv_cgroup } };
  33   omp_allocator_handle_t gpu_lowlat;
  34   #pragma omp target map(from:gpu_lowlat)
  35   gpu_lowlat = omp_init_allocator (omp_low_lat_mem_space, 1, traits);
  36
  37   // Smaller than low-latency memory limit
  38   test (omp_default_mem_alloc);
  39   test (omp_large_cap_mem_alloc);
  40   test (omp_const_mem_alloc);
  41   test (omp_high_bw_mem_alloc);
  42   test (omp_low_lat_mem_alloc);
  43   test (gpu_lowlat);
  44   test (omp_cgroup_mem_alloc);
  45   test (omp_pteam_mem_alloc);
  46   test (omp_thread_mem_alloc);
  47
  48   return 0;
  49 }