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/* { dg-do run { target openacc_nvidia_accel_selected } } */
/* { dg-additional-options "-lcuda" } */
/* { dg-require-effective-target openacc_cuda } */
#include <stdlib.h>
#include <unistd.h>
#include <openacc.h>
#include <sys/time.h>
#include <stdio.h>
#include <cuda.h>
int
main (int argc, char **argv)
{
const int N = 1024 * 1024;
int i;
unsigned char *h;
void *d;
float async, sync;
struct timeval start, stop;
CUresult r;
CUstream s;
acc_init (acc_device_nvidia);
h = (unsigned char *) malloc (N);
for (i = 0; i < N; i++)
{
h[i] = i;
}
d = acc_malloc (N);
acc_map_data (h, d, N);
gettimeofday (&start, NULL);
for (i = 0; i < 100; i++)
{
#pragma acc update device(h[0:N])
}
gettimeofday (&stop, NULL);
sync = (float) (stop.tv_sec - start.tv_sec);
sync += (float) ((stop.tv_usec - start.tv_usec) / 1000000.0);
gettimeofday (&start, NULL);
r = cuStreamCreate (&s, CU_STREAM_DEFAULT);
if (r != CUDA_SUCCESS)
{
fprintf (stderr, "cuStreamCreate failed: %d\n", r);
abort ();
}
if (!acc_set_cuda_stream (0, s))
abort ();
for (i = 0; i < 100; i++)
{
#pragma acc update device(h[0:N]) async(0)
}
acc_wait_all ();
gettimeofday (&stop, NULL);
async = (float) (stop.tv_sec - start.tv_sec);
async += (float) ((stop.tv_usec - start.tv_usec) / 1000000.0);
if (async > (sync * 1.5))
abort ();
acc_unmap_data (h);
acc_free (d);
free (h);
acc_shutdown (acc_device_nvidia);
return 0;
}
/* { dg-output "" } */
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