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673e6b220a
gem_sync just does a gtt sync by using set_domain(GTT, GTT). Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*
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* Copyright © 2008-9 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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* Chris Wilson <chris@chris-wilson.co.uk>
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*
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*/
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#include "config.h"
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <pthread.h>
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#include "drm.h"
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#include "i915_drm.h"
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#include "drmtest.h"
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#define OBJECT_SIZE (128*1024) /* restricted to 1MiB alignment on i915 fences */
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/* Before introduction of the LRU list for fences, allocation of a fence for a page
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* fault would use the first inactive fence (i.e. in preference one with no outstanding
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* GPU activity, or it would wait on the first to finish). Given the choice, it would simply
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* reuse the fence that had just been allocated for the previous page-fault - the worst choice
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* when copying between two buffers and thus constantly swapping fences.
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*/
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static void *
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bo_create (int fd)
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{
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struct drm_i915_gem_create create;
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struct drm_i915_gem_set_tiling tiling;
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struct drm_i915_gem_mmap_gtt mmap_arg;
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void *ptr;
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int handle;
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int ret;
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memset(&create, 0, sizeof(create));
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create.size = OBJECT_SIZE;
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ret = ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create);
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assert(ret == 0);
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handle = create.handle;
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memset(&tiling, 0, sizeof(tiling));
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tiling.handle = handle;
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tiling.tiling_mode = I915_TILING_X;
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tiling.stride = 1024;
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ret = ioctl(fd, DRM_IOCTL_I915_GEM_SET_TILING, &tiling);
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assert(ret == 0);
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memset(&mmap_arg, 0, sizeof(mmap_arg));
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mmap_arg.handle = handle;
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/* Get the fake offset back... */
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ret = ioctl(fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg);
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assert (ret == 0);
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ptr = mmap64(0, OBJECT_SIZE, PROT_READ | PROT_WRITE,
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MAP_SHARED, fd, mmap_arg.offset);
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assert (ptr != MAP_FAILED);
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/* XXX: mmap_gtt pulls the bo into the GTT read domain. */
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gem_sync(fd, handle);
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return ptr;
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}
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static void *
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bo_copy (void *_arg)
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{
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int fd = *(int *)_arg;
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int n;
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char *a, *b;
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a = bo_create (fd);
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b = bo_create (fd);
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for (n = 0; n < 1000; n++) {
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memcpy (a, b, OBJECT_SIZE);
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sched_yield ();
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}
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return NULL;
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}
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int
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main(int argc, char **argv)
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{
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drm_i915_getparam_t gp;
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pthread_t threads[32];
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int n, num_fences;
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int fd, ret;
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fd = drm_open_any();
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gp.param = I915_PARAM_NUM_FENCES_AVAIL;
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gp.value = &num_fences;
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ret = ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
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assert (ret == 0);
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printf ("creating %d threads\n", num_fences);
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assert (num_fences < sizeof (threads) / sizeof (threads[0]));
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for (n = 0; n < num_fences; n++)
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pthread_create (&threads[n], NULL, bo_copy, &fd);
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for (n = 0; n < num_fences; n++)
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pthread_join (threads[n], NULL);
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close(fd);
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return 0;
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}
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