i915/guc: Reset engine utilization buffer before registration

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[ Upstream commit abcc2ddae5 ]

On GT reset, we store total busyness counts for all engines and
re-register the utilization buffer with GuC. At that time we should
reset the buffer, so that we don't get spurious busyness counts on
subsequent queries.

To repro this issue, run igt@perf_pmu@busy-hang followed by
igt@perf_pmu@most-busy-idle-check-all for a couple iterations.

Fixes: 77cdd054dd ("drm/i915/pmu: Connect engine busyness stats from GuC to pmu")
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241127174006.190128-2-umesh.nerlige.ramappa@intel.com
(cherry picked from commit abd318237f)
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Umesh Nerlige Ramappa 2024-11-27 09:40:04 -08:00 • committed by Greg Kroah-Hartman

parent 17a915416b

commit 7779088287

1 changed files with 21 additions and 0 deletions

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drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

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