6.6-stable review patch. If anyone has any objections, please let me know.
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From: Umesh Nerlige Ramappa umesh.nerlige.ramappa@intel.com
[ Upstream commit 1622ed27d26ab4c234476be746aa55bcd39159dd ]
On gt reset, if a context is running, then accumulate it's active time into the busyness counter since there will be no chance for the context to switch out and update it's run time.
v2: Move comment right above the if (John)
Fixes: 77cdd054dd2c ("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/20241127174006.190128-4-umesh.... (cherry picked from commit 7ed047da59cfa1acb558b95169d347acc8d85da1) Signed-off-by: Tvrtko Ursulin tursulin@ursulin.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index 9028160b8448..ccaf9437cd0d 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -1394,8 +1394,21 @@ static void __reset_guc_busyness_stats(struct intel_guc *guc)
guc_update_pm_timestamp(guc, &unused); for_each_engine(engine, gt, id) { + struct intel_engine_guc_stats *stats = &engine->stats.guc; + guc_update_engine_gt_clks(engine); - engine->stats.guc.prev_total = 0; + + /* + * If resetting a running context, accumulate the active + * time as well since there will be no context switch. + */ + if (stats->running) { + u64 clk = guc->timestamp.gt_stamp - stats->start_gt_clk; + + stats->total_gt_clks += clk; + } + stats->prev_total = 0; + stats->running = 0; }
spin_unlock_irqrestore(&guc->timestamp.lock, flags);