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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-10-01 17:47:55 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-10-01 22:34:24 +0300 |
| commit | e9eaf82d97a2b05460ff5ef6a3e07446f7d049fe (patch) | |
| tree | 438f33d4ca7e450b661260806a97f4a2d0ad9bbd /drivers/gpu/drm/i915/i915_request.c | |
| parent | e2f3496e93be3238de2e2e6bfc83b3a83c084ce5 (diff) | |
| download | linux-e9eaf82d97a2b05460ff5ef6a3e07446f7d049fe.tar.xz | |
drm/i915: Priority boost for waiting clients
Latency is in the eye of the beholder. In the case where a client stops
and waits for the gpu, give that request chain a small priority boost
(not so that it overtakes higher priority clients, to preserve the
external ordering) so that ideally the wait completes earlier.
v2: Tvrtko recommends to keep the boost-from-user-stall as small as
possible and to allow new client flows to be preferred for interactivity
over stalls.
Testcase: igt/gem_sync/switch-default
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001144755.7978-3-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_request.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index d73ad490a261..abd4dacbab8e 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -1237,6 +1237,8 @@ long i915_request_wait(struct i915_request *rq, add_wait_queue(errq, &reset); intel_wait_init(&wait); + if (flags & I915_WAIT_PRIORITY) + i915_schedule_bump_priority(rq, I915_PRIORITY_WAIT); restart: do { |