drm/i915/gt: Schedule request retirement when signaler idles

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Very similar to commit 4f88f8747f ("drm/i915/gt: Schedule request
retirement when timeline idles"), but this time instead of coupling into
the execlists CS event interrupt, we couple into the breadcrumb
interrupt and queue a timeline's retirement when the last signaler is
completed. This should allow us to more rapidly park ringbuffer
submission, and so help reduce power consumption on older systems.

v2: Fixup intel_engine_add_retire() to handle concurrent callers

References: 4f88f8747f ("drm/i915/gt: Schedule request retirement when timeline idles")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191219124353.8607-1-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2019-12-19 12:43:52 +00:00

parent cabeacd4cc

commit dc93c9b693

3 changed files with 8 additions and 7 deletions

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6

drivers/gpu/drm/i915/gt/intel_breadcrumbs.c

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7

drivers/gpu/drm/i915/gt/intel_gt_requests.c

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2

drivers/gpu/drm/i915/gt/intel_lrc.c

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