Latency tracker #4623
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Latency tracker #4623
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Matches std::vector.
We'll need this in more places.
Implements a basic latency sleep solution that is intended to work without requiring games to support any related vendor features. This alone is not enough to expose the Reflex API to applications via dxvk-nvapi, but since that relies on NV_low_latency2 specifics anyway, we are going to add an implementation based on that extension later with an extended interface.
NV latency sleep seems to be straight-up broken at a driver level.
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Closing, will make follow-up PR with full Reflex support since I mostly have that working locally now. |
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This isn't Reflex integration yet, but sort of serves as groundwork for it.
NV_low_latency2requires us to pass frame IDs to queue submissions, and some markers will need to be submitted at different times due to internal threading, so we kind of need to pass a bunch of state and internal markers around anyway, which is already 90% of the work needed to support latency sleep in many (older) games.This PR adds this on top of
NV_low_latency2as well as a homebrew latency sleep solution that's based on our internal timings. This can be enabled by settingdxvk.latencySleep = Truein the config file.The next step would be to add another implementation that consumes markers from the application (and handles all sorts of potential bugs) and implement the
ID3DLowLatencyDeviceinterface for dxvk-nvapi.Obviously not tested very well, especially D3D9 is a mess.