Apollo runs its capture thread at CRITICAL and its encoder thread at ABOVE_NORMAL; we set
none. Our GPU work is already HIGH priority, but the GPU scheduler can only favour commands
we've SUBMITTED — a normal-priority thread descheduled by a CPU-heavy game submits the
convert/encode late, so the HIGH GPU priority never bites (consistent with the measured
"NVENC engine idle yet the encode waits ~15 ms"). Raise the WGC helper's capture+encode
loop and the single-process capture+encode loop to THREAD_PRIORITY_HIGHEST, and the
transmit thread to ABOVE_NORMAL, via a cross-platform boost_thread_priority() (Windows-only
effect — the Linux host caps the game via gamescope so its threads aren't starved).
Not yet built/validated on the GPU box (it's down); the cross-platform side compiles
(cargo check) and the Windows calls are cross-checked against the windows-0.62 API.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
enricobuehler
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