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drm/i915/selftests: Prevent the timeslice expiring during suppression tests 

When testing whether we prevent suppressing preemption, it helps to
avoid a time slice expiring prematurely.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111108
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190812091045.29587-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-08-12 10:10:39 +01:00
parent f597625d12
commit acb9488dca
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/i915/gt/selftest_lrc.c
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@ -913,6 +913,8 @@ static int live_suppress_self_preempt(void *arg)
goto err_wedged;
}
/* Keep postponing the timer to avoid premature slicing */
mod_timer(&engine->execlists.timer, jiffies + HZ);
for (depth = 0; depth < 8; depth++) {
rq_b = spinner_create_request(&b.spin,
b.ctx, engine,
@ -938,7 +940,8 @@ static int live_suppress_self_preempt(void *arg)
igt_spinner_end(&a.spin);
if (engine->execlists.preempt_hang.count) {
pr_err("Preemption recorded x%d, depth %d; should have been suppressed!\n",
pr_err("Preemption on %s recorded x%d, depth %d; should have been suppressed!\n",
engine->name,
engine->execlists.preempt_hang.count,
depth);
err = -EINVAL;