On 14/12/2020 10:51, Chris Wilson wrote:
RC6 should work before suspend, and continue to increment while idle
after suspend. Should.
v2: Include a longer sleep after suspend; it appears we are reticent to
idle so soon after waking up.
Signed-off-by: Chris Wilson <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
---
tests/i915/perf_pmu.c | 28 +++++++++++++++++++++++++---
1 file changed, 25 insertions(+), 3 deletions(-)
diff --git a/tests/i915/perf_pmu.c b/tests/i915/perf_pmu.c
index cb7273142..0b470c1bc 100644
--- a/tests/i915/perf_pmu.c
+++ b/tests/i915/perf_pmu.c
@@ -170,6 +170,7 @@ static unsigned int measured_usleep(unsigned int usec)
#define TEST_RUNTIME_PM (8)
#define FLAG_LONG (16)
#define FLAG_HANG (32)
+#define TEST_S3 (64)
static igt_spin_t * __spin_poll(int fd, uint32_t ctx,
const struct intel_execution_engine2 *e)
@@ -1578,7 +1579,7 @@ test_frequency_idle(int gem_fd)
"Actual frequency should be 0 while parked!\n");
}
-static bool wait_for_rc6(int fd)
+static bool wait_for_rc6(int fd, int timeout)
{
struct timespec tv = {};
uint64_t start, now;
@@ -1594,7 +1595,7 @@ static bool wait_for_rc6(int fd)
now = pmu_read_single(fd);
if (now - start > 1e6)
return true;
- } while (!igt_seconds_elapsed(&tv));
+ } while (igt_seconds_elapsed(&tv) <= timeout);
return false;
}
@@ -1636,14 +1637,32 @@ test_rc6(int gem_fd, unsigned int flags)
}
}
- igt_require(wait_for_rc6(fd));
+ igt_require(wait_for_rc6(fd, 1));
/* While idle check full RC6. */
prev = __pmu_read_single(fd, &ts[0]);
slept = measured_usleep(duration_ns / 1000);
idle = __pmu_read_single(fd, &ts[1]);
+
igt_debug("slept=%lu perf=%"PRIu64"\n", slept, ts[1] - ts[0]);
+ assert_within_epsilon(idle - prev, ts[1] - ts[0], tolerance);
+
+ if (flags & TEST_S3) {
+ prev = __pmu_read_single(fd, &ts[0]);
+ igt_system_suspend_autoresume(SUSPEND_STATE_MEM,
+ SUSPEND_TEST_NONE);
+ idle = __pmu_read_single(fd, &ts[1]);
+ igt_debug("suspend=%"PRIu64"\n", ts[1] - ts[0]);
+ //assert_within_epsilon(idle - prev, ts[1] - ts[0], tolerance);
+ }
+
+ igt_assert(wait_for_rc6(fd, 5));
+ prev = __pmu_read_single(fd, &ts[0]);
+ slept = measured_usleep(duration_ns / 1000);
+ idle = __pmu_read_single(fd, &ts[1]);
+
+ igt_debug("slept=%lu perf=%"PRIu64"\n", slept, ts[1] - ts[0]);
You plan to leave the C++ bit commented out above and just check it
here? Doesn't seem it harms to check twice in the non-S3 case anyway,
just asking.
Regards,
Tvrtko
assert_within_epsilon(idle - prev, ts[1] - ts[0], tolerance);
/* Wake up device and check no RC6. */
@@ -2245,6 +2264,9 @@ igt_main
igt_subtest("rc6-runtime-pm-long")
test_rc6(fd, TEST_RUNTIME_PM | FLAG_LONG);
+ igt_subtest("rc6-suspend")
+ test_rc6(fd, TEST_S3);
+
/**
* Check render nodes are counted.
*/
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