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// RUN: %libomp-compile-and-run
// RUN: %libomp-compile && env KMP_TASKLOOP_MIN_TASKS=1 %libomp-run
// These compilers don't support the taskloop construct
// UNSUPPORTED: gcc-4, gcc-5, icc-16
// GCC 6 has support for taskloops, but at least 6.3.0 is crashing on this test
// UNSUPPORTED: gcc-6
/*
* Test for taskloop
* Method: caculate how many times the iteration space is dispatched
* and judge if each dispatch has the requested grainsize
* It is possible for two adjacent chunks are executed by the same thread
*/
#include <stdio.h>
#include <omp.h>
#include <stdlib.h>
#include "omp_testsuite.h"
#define CFDMAX_SIZE 1120
int test_omp_taskloop_grainsize()
{
int result = 0;
int i, grainsize, count, tmp_count, num_off;
int *tmp, *tids, *tidsArray;
tidsArray = (int *)malloc(sizeof(int) * CFDMAX_SIZE);
tids = tidsArray;
for (grainsize = 1; grainsize < 48; ++grainsize) {
fprintf(stderr, "Grainsize %d\n", grainsize);
count = tmp_count = num_off = 0;
for (i = 0; i < CFDMAX_SIZE; ++i) {
tids[i] = -1;
}
#pragma omp parallel shared(tids)
{
#pragma omp master
#pragma omp taskloop grainsize(grainsize)
for (i = 0; i < CFDMAX_SIZE; i++) {
tids[i] = omp_get_thread_num();
}
}
for (i = 0; i < CFDMAX_SIZE; ++i) {
if (tids[i] == -1) {
fprintf(stderr, " Iteration %d not touched!\n", i);
result++;
}
}
for (i = 0; i < CFDMAX_SIZE - 1; ++i) {
if (tids[i] != tids[i + 1]) {
count++;
}
}
tmp = (int *)malloc(sizeof(int) * (count + 1));
tmp[0] = 1;
for (i = 0; i < CFDMAX_SIZE - 1; ++i) {
if (tmp_count > count) {
printf("--------------------\nTestinternal Error: List too "
"small!!!\n--------------------\n");
break;
}
if (tids[i] != tids[i + 1]) {
tmp_count++;
tmp[tmp_count] = 1;
} else {
tmp[tmp_count]++;
}
}
// is grainsize statement working?
int num_tasks = CFDMAX_SIZE / grainsize;
int multiple1 = CFDMAX_SIZE / num_tasks;
int multiple2 = CFDMAX_SIZE / num_tasks + 1;
for (i = 0; i < count; i++) {
// it is possible for 2 adjacent chunks assigned to a same thread
if (tmp[i] % multiple1 != 0 && tmp[i] % multiple2 != 0) {
num_off++;
}
}
if (num_off > 1) {
fprintf(stderr, " The number of bad chunks is %d\n", num_off);
result++;
} else {
fprintf(stderr, " Everything ok\n");
}
free(tmp);
}
free(tidsArray);
return (result==0);
}
int main()
{
int i;
int num_failed=0;
for (i = 0; i < REPETITIONS; i++) {
if (!test_omp_taskloop_grainsize()) {
num_failed++;
}
}
return num_failed;
}
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