From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Simple test to check correct queue-depth is reported per engine.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
tests/perf_pmu.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 79 insertions(+)
diff --git a/tests/perf_pmu.c b/tests/perf_pmu.c
index 8585ed7bcee8..17f0afca6fe1 100644
--- a/tests/perf_pmu.c
+++ b/tests/perf_pmu.c
@@ -87,6 +87,17 @@ static uint64_t pmu_read_single(int fd)
return data[0];
}
+static uint64_t pmu_sample_single(int fd, uint64_t *val)
+{
+ uint64_t data[2];
+
+ igt_assert_eq(read(fd, data, sizeof(data)), sizeof(data));
+
+ *val = data[0];
+
+ return data[1];
+}
+
static void pmu_read_multi(int fd, unsigned int num, uint64_t *val)
{
uint64_t buf[2 + num];
@@ -655,6 +666,65 @@ multi_client(int gem_fd, const struct intel_execution_engine2 *e)
assert_within_epsilon(val[1], slept, tolerance);
}
+static double calc_queued(uint64_t d_val, uint64_t d_ns)
+{
+ return (double)d_val * 1e9 * I915_SAMPLE_QUEUED_SCALE / d_ns;
+}
+
+static void
+queued(int gem_fd, const struct intel_execution_engine2 *e)
+{
+ const unsigned long duration_ns = 500e6;
+ igt_spin_t *spin[2];
+ uint64_t val[2];
+ uint64_t ts[2];
+ int fd;
+
+ fd = open_pmu(I915_PMU_ENGINE_QUEUED(e->class, e->instance));
+
+ /*
+ * First check on an idle engine.
+ */
+ ts[0] = pmu_sample_single(fd, &val[0]);
+ usleep(duration_ns / 3000);
+ ts[1] = pmu_sample_single(fd, &val[1]);
+ assert_within_epsilon(calc_queued(val[1] - val[0], ts[1] - ts[0]),
+ 0.0, tolerance);
+
+ /*
+ * First spin batch will be immediately executing.
+ */
+ spin[0] = igt_spin_batch_new(gem_fd, 0, e2ring(gem_fd, e), 0);
+ igt_spin_batch_set_timeout(spin[0], duration_ns);
+
+ ts[0] = pmu_sample_single(fd, &val[0]);
+ usleep(duration_ns / 3000);
+ ts[1] = pmu_sample_single(fd, &val[1]);
+ assert_within_epsilon(calc_queued(val[1] - val[0], ts[1] - ts[0]),
+ 1.0, tolerance);
+
+ /*
+ * Second spin batch will sit in the execution queue behind the
+ * first one so must cause the PMU to correctly report the queued
+ * counter.
+ */
+ spin[1] = igt_spin_batch_new(gem_fd, 0, e2ring(gem_fd, e), 0);
+ igt_spin_batch_set_timeout(spin[1], duration_ns);
+
+ ts[0] = pmu_sample_single(fd, &val[0]);
+ usleep(duration_ns / 3000);
+ ts[1] = pmu_sample_single(fd, &val[1]);
+ assert_within_epsilon(calc_queued(val[1] - val[0], ts[1] - ts[0]),
+ 2.0, tolerance);
+
+ gem_sync(gem_fd, spin[0]->handle);
+ gem_sync(gem_fd, spin[1]->handle);
+
+ igt_spin_batch_free(gem_fd, spin[0]);
+ igt_spin_batch_free(gem_fd, spin[1]);
+ close(fd);
+}
+
/**
* Tests that i915 PMU corectly errors out in invalid initialization.
* i915 PMU is uncore PMU, thus:
@@ -1112,6 +1182,9 @@ igt_main
igt_subtest_f("init-sema-%s", e->name)
init(fd, e, I915_SAMPLE_SEMA);
+ igt_subtest_f("init-queued-%s", e->name)
+ init(fd, e, I915_SAMPLE_QUEUED);
+
/**
* Test that engines show no load when idle.
*/
@@ -1166,6 +1239,12 @@ igt_main
*/
igt_subtest_f("multi-client-%s", e->name)
multi_client(fd, e);
+
+ /**
+ * Test that queued metric works.
+ */
+ igt_subtest_f("queued-%s", e->name)
+ queued(fd, e);
}
/**
--
2.14.1
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