mirror of
https://github.com/bryanthaboi/gen1recomp
synced 2026-09-26 13:33:27 -04:00
1jamie
f82f565cae
the display sync stuff i added was probing whether vsync was actually working, but it was measuring the wrong thing. during the probe we software-cap at 60 for safety, and the probe was looking at the gap between frames... which includes the sleep 😅 ..... so it always looked like sync was fine even when the driver was ignoring it. on something like the ally x on windows thats a real problem. vsync says on, probe says gated, we lift the cap and snap logic to the panel hz, then youre basically uncapped. at 2–4x that turns into hitching, dropped frames, dropped input, that weird half second freeze. speed swapping wasnt desyncing the driver, it was just making the bad path hurt more.
the solution is just we time present() itself now, not the gap after it, this way the warmup sleep cant fake a pass. if sync is unclear or broken we just stay on a capped 60 and dont snap logic. Also fixed fixedstep so it snaps wall clock dt before applying speed, so in general the 2-4x speed swaps dont screw the pacing math anymore
81 lines
3.3 KiB
Lua
81 lines
3.3 KiB
Lua
-- Live PresentProbe driver. Boots far enough to present, waits for the
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-- gated/ungated classification (present() block time, not inter-frame gaps),
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-- then prints the result and quits.
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--
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-- cd /home/autumn/src/gen1recomp-gaia
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-- POKEPORT_DRIVER=tests/drivers/linux_present_probe.lua POKEPORT_TOUCH=0 \
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-- POKEPORT_IDENTITY=linux-present-probe love .
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--
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-- Force XWayland (common Deck / Gamescope path):
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-- SDL_VIDEODRIVER=x11 POKEPORT_DRIVER=... love .
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return function(game)
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local U = dofile("tests/drivers/util.lua")
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local LPS = require("src.core.PresentProbe")
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local VSync = require("src.core.VSync")
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local FrameCap = require("src.core.FrameCap")
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local RefreshRate = require("src.core.RefreshRate")
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-- Prefer a known pacing setup so the probe is comparable across runs.
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VSync.apply("on")
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FrameCap.apply(FrameCap.DISPLAY)
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U.log("=== linux present probe start ===")
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U.log("env",
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"XDG_SESSION_TYPE=" .. tostring(os.getenv("XDG_SESSION_TYPE")),
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"WAYLAND_DISPLAY=" .. tostring(os.getenv("WAYLAND_DISPLAY")),
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"DISPLAY=" .. tostring(os.getenv("DISPLAY")),
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"SDL_VIDEODRIVER=" .. tostring(os.getenv("SDL_VIDEODRIVER") or "<unset>"),
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"GAMESCOPE=" .. tostring(os.getenv("GAMESCOPE_WAYLAND_DISPLAY") or ""))
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local function dump(tag)
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local s = LPS.status()
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local hz = RefreshRate.hz()
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U.log(tag,
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"driver=" .. tostring(s.driver),
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"nest=" .. tostring(s.nest),
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"gamescope=" .. tostring(s.gamescope),
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"gated=" .. tostring(s.gated),
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"strategy=" .. tostring(s.strategy),
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"needsSoftwareCap=" .. tostring(s.needsSoftwareCap),
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"probe=" .. tostring(s.probeCount),
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"hz=" .. tostring(hz),
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"vsyncWant=" .. tostring(VSync.isOn()),
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"vsyncEff=" .. tostring(VSync.effective and VSync.effective() or "?"),
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"fpsCap=" .. FrameCap.label(FrameCap.current))
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end
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dump("before-wait")
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-- Probe needs ~45 present samples; give the run loop room past that.
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for i = 1, 120 do
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U.wait(1)
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local s = LPS.status()
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if s.gated ~= nil and i >= 50 then break end
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end
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dump("after-probe")
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local s = LPS.status()
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if not s.linux then
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U.log("RESULT", "FAIL not-linux")
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elseif s.nest == "wayland" and s.strategy == "sdl" and s.gated == true then
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U.log("RESULT", "PASS wayland-sdl-gated (SDL frame wait is doing the work)")
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elseif s.nest == "wayland" and s.needsSoftwareCap then
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U.log("RESULT", "WARN wayland-ungated (SDL vsync ineffective; FrameCap thermal net)")
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elseif (s.nest == "x11" or s.nest == "xwayland") and s.strategy == "sdl" and s.gated == true then
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U.log("RESULT", "PASS " .. s.nest .. "-sdl-gated (GLX swap-interval gating)")
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elseif (s.nest == "x11" or s.nest == "xwayland") and (s.strategy == "oml" or s.strategy == "sgi") then
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U.log("RESULT", "PASS " .. s.nest .. "-glx-" .. s.strategy .. " (real wait bound after ungated probe)")
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elseif s.nest == "xwayland" and s.needsSoftwareCap then
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U.log("RESULT", "PASS xwayland-ungated-softcap (no GLX wait; FrameCap thermal net)")
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elseif (s.nest == "x11" or s.nest == "xwayland") and s.needsSoftwareCap then
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U.log("RESULT", "WARN " .. s.nest .. "-ungated-no-glx (thermal net only; no OML/SGI bind)")
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else
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U.log("RESULT", "INFO see-after-probe-line")
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end
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U.log("=== linux present probe done ===")
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love.event.quit()
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end
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