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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-04-26 11:06:59 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-04-26 13:51:31 +0300 |
| commit | f7b02a529a81761b44d7fa164bd84333f3232989 (patch) | |
| tree | 0aa3fad43bdb2b16780f8d3529c1ac8b2b45b496 /drivers/gpu/drm/i915/i915_gem_request.c | |
| parent | 010018638659fbe8332c470e94750daf6ef4ab14 (diff) | |
| download | linux-f7b02a529a81761b44d7fa164bd84333f3232989.tar.xz | |
drm/i915: Skip waking the signaler when enabling before request submission
If we are enabling the breadcrumbs signaling prior to submitting the
request, we know that we cannot have missed the interrupt and can
therefore skip immediately waking the signaler to check.
This reduces a significant chunk of the __i915_gem_request_submit()
overhead for inter-engine synchronisation, for example in gem_exec_whisper.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170426080659.28771-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_request.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_request.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index 126cd13abf54..6198f6997d05 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -61,7 +61,7 @@ static bool i915_fence_enable_signaling(struct dma_fence *fence) if (i915_fence_signaled(fence)) return false; - intel_engine_enable_signaling(to_request(fence)); + intel_engine_enable_signaling(to_request(fence), true); return true; } @@ -437,7 +437,7 @@ void __i915_gem_request_submit(struct drm_i915_gem_request *request) spin_lock_nested(&request->lock, SINGLE_DEPTH_NESTING); request->global_seqno = seqno; if (test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, &request->fence.flags)) - intel_engine_enable_signaling(request); + intel_engine_enable_signaling(request, false); spin_unlock(&request->lock); engine->emit_breadcrumb(request, |