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// RUN: %libomp-compile
// RUN: env OMP_PROC_BIND=close OMP_PLACES=threads %libomp-run
// RUN: env OMP_PROC_BIND=close OMP_PLACES=cores %libomp-run
// RUN: env OMP_PROC_BIND=close OMP_PLACES=sockets %libomp-run
// RUN: env KMP_AFFINITY=compact %libomp-run
// RUN: env KMP_AFFINITY=scatter %libomp-run
// REQUIRES: affinity
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <omp.h>
#include "helper.h"
#define DEBUG 0
#if DEBUG
#include <stdarg.h>
#endif
#define BUFFER_SIZE 1024
char buf[BUFFER_SIZE];
#pragma omp threadprivate(buf)
static int debug_printf(const char* format, ...) {
int retval = 0;
#if DEBUG
va_list args;
va_start(args, format);
retval = vprintf(format, args);
va_end(args);
#endif
return retval;
}
static void display_affinity_environment() {
#if DEBUG
printf("Affinity Environment:\n");
printf(" OMP_PROC_BIND=%s\n", getenv("OMP_PROC_BIND"));
printf(" OMP_PLACES=%s\n", getenv("OMP_PLACES"));
printf(" KMP_AFFINITY=%s\n", getenv("KMP_AFFINITY"));
#endif
}
// Reads in a list of integers into ids array (not going past ids_size)
// e.g., if affinity = "0-4,6,8-10,14,16,17-20,23"
// then ids = [0,1,2,3,4,6,8,9,10,14,16,17,18,19,20,23]
void list_to_ids(const char* affinity, int* ids, int ids_size) {
int id, b, e, ids_index;
char *aff, *begin, *end, *absolute_end;
aff = strdup(affinity);
absolute_end = aff + strlen(aff);
ids_index = 0;
begin = end = aff;
while (end < absolute_end) {
end = begin;
while (*end != '\0' && *end != ',')
end++;
*end = '\0';
if (strchr(begin, '-') != NULL) {
// Range
sscanf(begin, "%d-%d", &b, &e);
} else {
// Single Number
sscanf(begin, "%d", &b);
e = b;
}
for (id = b; id <= e; ++id) {
ids[ids_index++] = id;
if (ids_index >= ids_size) {
free(aff);
return;
}
}
begin = end + 1;
}
free(aff);
}
void check_thread_affinity() {
int i;
const char *formats[2] = {"%{thread_affinity}", "%A"};
for (i = 0; i < sizeof(formats) / sizeof(formats[0]); ++i) {
omp_set_affinity_format(formats[i]);
#pragma omp parallel
{
int j, k;
int place = omp_get_place_num();
int num_procs = omp_get_place_num_procs(place);
int *ids = (int *)malloc(sizeof(int) * num_procs);
int *ids2 = (int *)malloc(sizeof(int) * num_procs);
char buf[256];
size_t n = omp_capture_affinity(buf, 256, NULL);
check(n <= 256);
omp_get_place_proc_ids(place, ids);
list_to_ids(buf, ids2, num_procs);
#pragma omp for schedule(static) ordered
for (k = 0; k < omp_get_num_threads(); ++k) {
#pragma omp ordered
{
debug_printf("Thread %d: captured affinity = %s\n",
omp_get_thread_num(), buf);
for (j = 0; j < num_procs; ++j) {
debug_printf("Thread %d: ids[%d] = %d ids2[%d] = %d\n",
omp_get_thread_num(), j, ids[j], j, ids2[j]);
check(ids[j] == ids2[j]);
}
}
}
free(ids);
free(ids2);
}
}
}
int main(int argc, char** argv) {
omp_set_nested(1);
display_affinity_environment();
check_thread_affinity();
return 0;
}
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