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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-01-15 09:20:41 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-01-15 12:18:46 +0000 |
| commit | 99e48bf98dd036090b480a12c39e8b971731247e (patch) | |
| tree | c50938826482ecf2a3d9386a319dc9ea1f354e69 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | drm/i915/fence: Separate timeout mechanism for awaiting on dma-fences (diff) | |
| download | linux-99e48bf98dd036090b480a12c39e8b971731247e.tar.gz linux-99e48bf98dd036090b480a12c39e8b971731247e.zip | |
drm/i915: Lock out execlist tasklet while peeking inside for busy-stats
In order to prevent a race condition where we may end up overaccounting
the active state and leaving the busy-stats believing the GPU is 100%
busy, lock out the tasklet while we reconstruct the busy state. There is
no direct spinlock guard for the execlists->port[], so we need to
utilise tasklet_disable() as a synchronous barrier to prevent it, the
only writer to execlists->port[], from running at the same time as the
enable.
Fixes: 4900727d35bb ("drm/i915/pmu: Reconstruct active state on starting busy-stats")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180115092041.13509-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions