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| author | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2018-04-04 10:51:52 +0100 |
|---|---|---|
| committer | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2018-04-11 14:32:32 +0100 |
| commit | d502f055ac4500cada758876a512ac4f14b34851 (patch) | |
| tree | 90882fd94c3553f64c8920f3fa5993859101e052 /lib/intel_batchbuffer.c | |
| parent | a914075d55dd089095121906bf4c3e825a3cecf2 (diff) | |
tests/perf_pmu: Avoid RT thread for accuracy test
Realtime scheduling interferes with execlists submission (tasklet) so try
to simplify the PWM loop in a few ways:
* Drop RT.
* Longer batches for smaller systematic error.
* More truthful test duration calculation.
* Less clock queries.
* No self-adjust - instead just report the achieved cycle and let the
parent check against it.
* Report absolute cycle error.
v2:
* Bring back self-adjust. (Chris Wilson)
(But slightly fixed version with no overflow.)
v3:
* Log average and mean calibration for each pass.
v4:
* Eliminate development leftovers.
* Fix variance logging.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'lib/intel_batchbuffer.c')
0 files changed, 0 insertions, 0 deletions