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Chris Wilson authored
Since the clear-residuals security fix on gen7, context switches are very slow. If X is being used with DRI clients, those clients will typically be using the 3D engine for themselves and every frame presented will then be copied by X, causing at least a couple of context switches per frame. That greatly diminishes throughput, but if we prefer to use the blitter engine for X, we can mostly keep off the render engine avoiding the context thrash. Reported-by: Rafael Ristovski <rafael.ristovski@gmail.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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