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igt/gem_fence_upload: Add comparison against wc mmaps

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2015-01-02 16:33:32 +05:30 committed by Daniel Vetter
parent 58865891ba
commit d95736906d
1 changed files with 73 additions and 0 deletions
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73
tests/gem_fence_upload.c
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@ -267,6 +267,21 @@ static void *no_contention(void *closure)
return NULL;
}
static void *wc_mmap(void *closure)
{
struct thread_contention *t = closure;
int n;
for (n = 0; n < t->loops; n++) {
uint32_t *ptr = gem_mmap__wc(t->fd, t->handle, 0, OBJECT_SIZE, PROT_READ | PROT_WRITE);
igt_assert(ptr);
memset(ptr + (rand() % 256) * 4096 / 4, 0, 4096);
munmap(ptr, OBJECT_SIZE);
}
return NULL;
}
static void thread_contention(void)
{
const int loops = 4096;
@ -322,6 +337,62 @@ static void thread_contention(void)
igt_assert(tiled[1] > 0.75 * tiled[0]);
}
static void wc_contention(void)
{
const int loops = 4096;
int n, count;
int fd, num_fences;
double linear[2], tiled[2];
fd = drm_open_any();
igt_require_mmap_wc(fd);
num_fences = gem_available_fences(fd);
igt_require(num_fences > 0);
for (count = 1; count < 4*num_fences; count *= 2) {
struct timeval start, end;
struct thread_contention threads[count];
for (n = 0; n < count; n++) {
threads[n].handle = gem_create(fd, OBJECT_SIZE);
threads[n].loops = loops;
threads[n].fd = fd;
}
gettimeofday(&start, NULL);
for (n = 0; n < count; n++)
pthread_create(&threads[n].thread, NULL, wc_mmap, &threads[n]);
for (n = 0; n < count; n++)
pthread_join(threads[n].thread, NULL);
gettimeofday(&end, NULL);
linear[count != 2] = count * loops / elapsed(&start, &end) / (OBJECT_SIZE / 4096);
igt_info("Contended upload rate for %d linear threads/wc: %7.3fMiB/s\n", count, linear[count != 2]);
for (n = 0; n < count; n++)
gem_set_tiling(fd, threads[n].handle, I915_TILING_X, 1024);
gettimeofday(&start, NULL);
for (n = 0; n < count; n++)
pthread_create(&threads[n].thread, NULL, wc_mmap, &threads[n]);
for (n = 0; n < count; n++)
pthread_join(threads[n].thread, NULL);
gettimeofday(&end, NULL);
tiled[count != 2] = count * loops / elapsed(&start, &end) / (OBJECT_SIZE / 4096);
igt_info("Contended upload rate for %d tiled threads/wc: %7.3fMiB/s\n", count, tiled[count != 2]);
for (n = 0; n < count; n++) {
gem_close(fd, threads[n].handle);
}
}
errno = 0;
igt_assert(linear[1] > 0.75 * linear[0]);
igt_assert(tiled[1] > 0.75 * tiled[0]);
}
igt_main
{
igt_skip_on_simulation();
@ -330,6 +401,8 @@ igt_main
performance();
igt_subtest("thread-contention")
thread_contention();
igt_subtest("wc-contention")
wc_contention();
igt_subtest("thread-performance-read")
thread_performance(READ);
igt_subtest("thread-performance-write")