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