[igt-dev] [PATCH i-g-t 1/1] i915_pm_rpm: gem-execbuf-stress-extra-wait faster

[Caz Yokoyama]

On Tue, 2019-03-05 at 17:22 +0000, Chris Wilson wrote:
> Quoting Caz Yokoyama (2019-03-06 00:06:55)
> > Less iterate because WAIT_EXTRA adds extra 5 sec delay for each
> > iteration.
> > This test is similar to gem-execbuf-stress except for WAIT_EXTRA.
> > It runs 86 sec. while gem-execbuf-stress runs 38 sec.
> > i.e. 38s + iteration(rounds,10) * 5s = 88s
> 
> Why does it wait for 5s? There's no second stage to runtime suspend,
> but
> if there was, add a debug interface to force it.
I believe no because teardown_environment() is the onlye statement
after igt_subtest("gem-execbuf-stress-extra-wait").

> Something else that can be employed to speed up this test would be
> igt_drop_caches_set(DROP_IDLE) (before waiting for runtime suspend).
Yes, it does speed up to 56sec from 88sec. Not only gem-execbuf-stress-
extra-wait, but also other 2 tests speed up. For example, gem-execbuf-
stress speed up to 9sec from 38sec. Thank you.

How do you want to have patches? Only igt_drop_caches_set(DROP_IDLE)?
Both igt_drop_caches_set(DROP_IDLE) and rounds / 2 in a single patch?
Separate 2 patches?
-caz

> -Chris