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/* { dg-do run } */
/* { dg-xfail-run-if "Pinning not implemented on this host" { ! *-*-linux-gnu } } */
/* Test that pinned memory works (pool_size code path). */
#include <stdio.h>
#include <stdlib.h>
#ifdef __linux__
#include <sys/types.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/resource.h>
#define PAGE_SIZE sysconf(_SC_PAGESIZE)
#define CHECK_SIZE(SIZE) { \
struct rlimit limit; \
if (getrlimit (RLIMIT_MEMLOCK, &limit) \
|| limit.rlim_cur <= SIZE) \
fprintf (stderr, "unsufficient lockable memory; please increase ulimit\n"); \
}
int
get_pinned_mem ()
{
int pid = getpid ();
char buf[100];
sprintf (buf, "/proc/%d/status", pid);
FILE *proc = fopen (buf, "r");
if (!proc)
abort ();
while (fgets (buf, 100, proc))
{
int val;
if (sscanf (buf, "VmLck: %d", &val))
{
fclose (proc);
return val;
}
}
abort ();
}
#else
#define PAGE_SIZE 1024 /* unknown */
#define CHECK_SIZE(SIZE) { \
fprintf (stderr, "OS unsupported\n"); \
abort (); \
}
#define EXPECT_OMP_NULL_ALLOCATOR
int
get_pinned_mem ()
{
return 0;
}
#endif
static void
verify0 (char *p, size_t s)
{
for (size_t i = 0; i < s; ++i)
if (p[i] != 0)
abort ();
}
#include <omp.h>
int
main ()
{
/* Allocate at least a page each time, allowing space for overhead,
but stay within the ulimit. */
const int SIZE = PAGE_SIZE - 128;
CHECK_SIZE (SIZE * 5); // This is intended to help diagnose failures
const omp_alloctrait_t traits[] = {
{ omp_atk_pinned, 1 },
{ omp_atk_pool_size, SIZE * 8 }
};
omp_allocator_handle_t allocator = omp_init_allocator (omp_default_mem_space,
2, traits);
#ifdef EXPECT_OMP_NULL_ALLOCATOR
if (allocator == omp_null_allocator)
return 0;
#endif
// Sanity check
if (get_pinned_mem () != 0)
abort ();
void *p = omp_alloc (SIZE, allocator);
if (!p)
abort ();
int amount = get_pinned_mem ();
if (amount == 0)
abort ();
p = omp_realloc (p, SIZE * 2, allocator, allocator);
if (!p)
abort ();
int amount2 = get_pinned_mem ();
if (amount2 <= amount)
abort ();
/* SIZE*2 ensures that it doesn't slot into the space possibly
vacated by realloc. */
p = omp_calloc (1, SIZE * 2, allocator);
if (!p)
abort ();
if (get_pinned_mem () <= amount2)
abort ();
verify0 (p, SIZE * 2);
return 0;
}
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