Commit e60a0b10 authored by Chris Wilson's avatar Chris Wilson

drm/i915: Sleep whilst waiting for the ring

If userspace is submitting so many long running batches that the ring
becomes full, throttle by sleeping for a 1ms before checking for free
space. Simply yielding was causing excessive scheduler overhead whilst
making no progress.
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent 7b5337dd
......@@ -707,7 +707,7 @@ int intel_wait_ring_buffer(struct drm_device *dev,
master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
}
yield();
msleep(1);
} while (!time_after(jiffies, end));
trace_i915_ring_wait_end (dev);
return -EBUSY;
......
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