drm/i915: Limit ring synchronisation (sw sempahores) RPS boosts

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Ring switches can occur many times per frame, and are often out of
control, causing frequent RPS boosting for no practical benefit. Treat
the sw semaphore synchronisation as a separate client and only allow it
to boost once per busy/idle cycle.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: s/rq/req/]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Chris Wilson 2015-04-27 13:41:20 +01:00 • committed by Daniel Vetter

parent 03ade51185

commit a6f766f397

4 changed files with 25 additions and 18 deletions

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1

drivers/gpu/drm/i915/i915_debugfs.c

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34

drivers/gpu/drm/i915/i915_drv.h

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7

drivers/gpu/drm/i915/i915_gem.c

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1

drivers/gpu/drm/i915/intel_pm.c

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