Compute tunneling can considerably lower the latency of high-priority
compute work. Enabling it is beneficial in cases where high-priority
work is dispatched while the GPU is already busy with other work (e.g.
rendering on GFX). This is the case in VR compositors that dispatch
latency-sensitive compositing work to ACE while GFX is busy rendering
the next frame.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26462>
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