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drm/i915/gt: Only delay the context barrier pm

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It is strictly sufficient to only delay the intel_engine_pm_put from the
context barrier (and not from the context exit) in order to prevent the
gem_exec_nop contention. Adding the delay to the context exit incurs
noticably extra penalty for soft-rc6.

Fixes: edee52c927 ("drm/i915/gt: Delay release of engine-pm after last retirement")
Testcase: igt/i915_pm_rc6_residency/rc6-idle
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200323192029.20723-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-03-23 19:20:29 +00:00
parent 8493e110a6
commit af7a272ef6
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/gt/intel_context.c
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@ -350,7 +350,7 @@ void intel_context_enter_engine(struct intel_context *ce)
void intel_context_exit_engine(struct intel_context *ce)
{
intel_timeline_exit(ce->timeline);
intel_engine_pm_put_delay(ce->engine, 1);
intel_engine_pm_put(ce->engine);
}
int intel_context_prepare_remote_request(struct intel_context *ce,