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// RUN: %libomp-compile && %libomp-run 7
// RUN: %libomp-run 0 && %libomp-run -1
// RUN: %libomp-run 1 && %libomp-run 2 && %libomp-run 5
// RUN: %libomp-compile -DMY_SCHEDULE=guided && %libomp-run 7
// RUN: %libomp-run 1 && %libomp-run 2 && %libomp-run 5
// UNSUPPORTED: clang-11
#include <stdio.h>
#include <omp.h>
#include <stdlib.h>
#include <limits.h>
#include "omp_testsuite.h"
#define INCR 7
#define MY_MAX 200
#define MY_MIN -200
#ifndef MY_SCHEDULE
# define MY_SCHEDULE dynamic
#endif
int num_disp_buffers, num_loops;
int a, b, a_known_value, b_known_value;
int test_kmp_set_disp_num_buffers()
{
int success = 1;
a = 0;
b = 0;
// run many small dynamic loops to stress the dispatch buffer system
#pragma omp parallel
{
int i,j;
for (j = 0; j < num_loops; j++) {
#pragma omp for schedule(MY_SCHEDULE) nowait
for (i = MY_MIN; i < MY_MAX; i+=INCR) {
#pragma omp atomic
a++;
}
#pragma omp for schedule(MY_SCHEDULE) nowait
for (i = MY_MAX; i >= MY_MIN; i-=INCR) {
#pragma omp atomic
b++;
}
}
}
// detect failure
if (a != a_known_value || b != b_known_value) {
success = 0;
printf("a = %d (should be %d), b = %d (should be %d)\n", a, a_known_value,
b, b_known_value);
}
return success;
}
int main(int argc, char** argv)
{
int i,j;
int num_failed=0;
if (argc != 2) {
fprintf(stderr, "usage: %s num_disp_buffers\n", argv[0]);
exit(1);
}
// set the number of dispatch buffers
num_disp_buffers = atoi(argv[1]);
kmp_set_disp_num_buffers(num_disp_buffers);
// figure out the known values to compare with calculated result
a_known_value = 0;
b_known_value = 0;
// if specified to use bad num_disp_buffers set num_loops
// to something reasonable
if (num_disp_buffers <= 0)
num_loops = 10;
else
num_loops = num_disp_buffers*10;
for (j = 0; j < num_loops; j++) {
for (i = MY_MIN; i < MY_MAX; i+=INCR)
a_known_value++;
for (i = MY_MAX; i >= MY_MIN; i-=INCR)
b_known_value++;
}
for(i = 0; i < REPETITIONS; i++) {
if(!test_kmp_set_disp_num_buffers()) {
num_failed++;
}
}
return num_failed;
}
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