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igt/gem_sync: Add some forked variants

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Repeat the synchronisation test with a few competing processes.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-02-26 09:09:51 +00:00
parent d627e30c9e
commit 0667cf5669
1 changed files with 32 additions and 28 deletions
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60
tests/gem_sync.c
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@ -66,40 +66,41 @@ out:
}
static void
sync_ring(int fd, unsigned ring)
sync_ring(int fd, unsigned ring, int num_children)
{
const uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 object;
double start, elapsed;
unsigned long cycles;
gem_require_ring(fd, ring);
intel_detect_and_clear_missed_interrupts(fd);
memset(&object, 0, sizeof(object));
object.handle = gem_create(fd, 4096);
gem_write(fd, object.handle, 4096-sizeof(bbe), &bbe, sizeof(bbe));
igt_fork(child, num_children) {
const uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 object;
double start, elapsed;
unsigned long cycles;
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)&object;
execbuf.buffer_count = 1;
execbuf.flags = ring;
gem_execbuf(fd, &execbuf);
memset(&object, 0, sizeof(object));
object.handle = gem_create(fd, 4096);
gem_write(fd, object.handle, 0, &bbe, sizeof(bbe));
srandom(0xdeadbeef);
start = gettime();
cycles = 0;
do {
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)&object;
execbuf.buffer_count = 1;
execbuf.flags = ring;
gem_execbuf(fd, &execbuf);
gem_sync(fd, object.handle);
cycles++;
} while ((elapsed = gettime() - start) < SLOW_QUICK(10, 1));
igt_info("Completed %ld cycles: %.3f us\n", cycles, elapsed*1e6/cycles);
gem_close(fd, object.handle);
start = gettime();
cycles = 0;
do {
do {
gem_execbuf(fd, &execbuf);
gem_sync(fd, object.handle);
} while (++cycles & 1023);
} while ((elapsed = gettime() - start) < SLOW_QUICK(10, 1));
igt_info("Completed %ld cycles: %.3f us\n", cycles, elapsed*1e6/cycles);
gem_close(fd, object.handle);
}
igt_waitchildren();
igt_assert_eq(intel_detect_and_clear_missed_interrupts(fd), 0);
}
@ -113,9 +114,12 @@ igt_main
igt_fixture
fd = drm_open_driver(DRIVER_INTEL);
for (e = intel_execution_engines; e->name; e++)
for (e = intel_execution_engines; e->name; e++) {
igt_subtest_f("basic-%s", e->name)
sync_ring(fd, e->exec_id | e->flags);
sync_ring(fd, e->exec_id | e->flags, 1);
igt_subtest_f("forked-%s", e->name)
sync_ring(fd, e->exec_id | e->flags, sysconf(_SC_NPROCESSORS_ONLN));
}
igt_fixture
close(fd);