https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4222/shard-glkb1/igt@perf_pmu@enable-race-vecs0.html https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4222/shard-kbl1/igt@perf_pmu@enable-race-vcs1.html https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4222/shard-apl4/igt@perf_pmu@enable-race-rcs0.html There appear to be a lot more incomplete on various perf_pmu there is a possible connection to recent commits in IGT on the perf_pmu for example: commit 3fd9b578b3138b04178b4ce8ee4a60e74a16ec91 Author: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Date: Mon Feb 5 11:38:10 2018 +0000 tests/perf_pmu: Use short batches from hotplug test I therefore put these incompletes in a separate bug.
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3727/shard-apl1/igt@perf_pmu@enable-race-vcs0.html
I believe these to be commit b2f78cda260bc6a1a2d382b1d85a29e69b5b3724 Author: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Date: Mon Feb 5 09:34:48 2018 +0000 drm/i915/pmu: Fix PMU enable vs execlists tasklet race Commit 99e48bf98dd0 ("drm/i915: Lock out execlist tasklet while peeking inside for busy-stats") added a tasklet_disable call in busy stats enabling, but we failed to understand that the PMU enable callback runs as an hard IRQ (IPI). Consequence of this is that the PMU enable callback can interrupt the execlists tasklet, and will then deadlock when it calls intel_engine_stats_enable->tasklet_disable. To fix this, I realized it is possible to move the engine stats enablement and disablement to PMU event init and destroy hooks. This allows for much simpler implementation since those hooks run in normal context (can sleep). v2: Extract engine_event_destroy. (Chris Wilson) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Fixes: 99e48bf98dd0 ("drm/i915: Lock out execlist tasklet while peeking inside for busy-stats") Testcase: igt/perf_pmu/enable-race-* Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: intel-gfx@lists.freedesktop.org Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180205093448.13877-1-tvrtko.ursulin@linux.intel.com
Closing, please re-open if still occurs.
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