mirror of
https://github.com/tiagovignatti/intel-gpu-tools.git
synced 2025-06-09 17:06:14 +00:00
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/*
|
|
* Copyright © 2008-9 Intel Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*
|
|
* Authors:
|
|
* Eric Anholt <eric@anholt.net>
|
|
* Chris Wilson <chris@chris-wilson.co.uk>
|
|
*
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <fcntl.h>
|
|
#include <inttypes.h>
|
|
#include <errno.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/mman.h>
|
|
#include <pthread.h>
|
|
#include "drm.h"
|
|
#include "i915_drm.h"
|
|
#include "drmtest.h"
|
|
|
|
#define OBJECT_SIZE (128*1024) /* restricted to 1MiB alignment on i915 fences */
|
|
|
|
/* Before introduction of the LRU list for fences, allocation of a fence for a page
|
|
* fault would use the first inactive fence (i.e. in preference one with no outstanding
|
|
* GPU activity, or it would wait on the first to finish). Given the choice, it would simply
|
|
* reuse the fence that had just been allocated for the previous page-fault - the worst choice
|
|
* when copying between two buffers and thus constantly swapping fences.
|
|
*/
|
|
|
|
static void *
|
|
bo_create (int fd)
|
|
{
|
|
void *ptr;
|
|
int handle;
|
|
|
|
handle = gem_create(fd, OBJECT_SIZE);
|
|
|
|
gem_set_tiling(fd, handle, I915_TILING_X, 1024);
|
|
|
|
ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE);
|
|
|
|
/* XXX: mmap_gtt pulls the bo into the GTT read domain. */
|
|
gem_sync(fd, handle);
|
|
|
|
return ptr;
|
|
}
|
|
|
|
static void *
|
|
bo_copy (void *_arg)
|
|
{
|
|
int fd = *(int *)_arg;
|
|
int n;
|
|
char *a, *b;
|
|
|
|
a = bo_create (fd);
|
|
b = bo_create (fd);
|
|
|
|
for (n = 0; n < 1000; n++) {
|
|
memcpy (a, b, OBJECT_SIZE);
|
|
sched_yield ();
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
drm_i915_getparam_t gp;
|
|
pthread_t threads[32];
|
|
int n, num_fences;
|
|
int fd, ret;
|
|
|
|
fd = drm_open_any();
|
|
|
|
gp.param = I915_PARAM_NUM_FENCES_AVAIL;
|
|
gp.value = &num_fences;
|
|
ret = ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
|
|
assert (ret == 0);
|
|
|
|
printf ("creating %d threads\n", num_fences);
|
|
assert (num_fences < sizeof (threads) / sizeof (threads[0]));
|
|
|
|
for (n = 0; n < num_fences; n++)
|
|
pthread_create (&threads[n], NULL, bo_copy, &fd);
|
|
|
|
for (n = 0; n < num_fences; n++)
|
|
pthread_join (threads[n], NULL);
|
|
|
|
close(fd);
|
|
|
|
return 0;
|
|
}
|