[Bug 87725] [BDW Bisected] OglBatch7 performance reduced by ~7% after enable execlists

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87725

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
There isn't enough work to submit pairs of batches - we spend, between synmark,
mesa and the driver, longer to create the batch for execution than it takes the
GPU to execute it. This test really does focus on submission overhead. I think
I have it mostly down to the noise now, or at least down to the level where
even I won't whinge too much. (There is definitely room for improvement wrt to
the hardware responding to ELSP so hopefully it will be less of an issue in
future gen.)

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