eglantine-cirakg/src/video_core/control/scheduler.h, branch nx2

nx2: don't stall presents on a current-frame wait the GPU can't finish

2026-11-02T19:53:47+00:00

0f14696044 made PresentClientBuffer also wait for the current frame's fence whenever the previous frame's wasn't reached. Mario Kart World's GPU waits on semaphores its CPU releases only after the present returns, so in that state the current fence can't be reached until the present returns, and each such present stalled up to the 4 s deadline. Wait for the current frame by default, but give up after a few ms once a GPU channel was seen suspended on a semaphore acquire and wait for the previous frame instead. EDEN_NX2_FRAMES_AHEAD=1 always waits for the previous frame (with 0f14696044's current-frame wait when the GPU is behind), =0 always for the current one. The scheduler gains a lock-free flag so the present thread can see suspended channels. Assisted-by: Claude Sonnet 5.5 (implementation and commit message)

video_core: split the GPU thread in two (EDEN_NX2_SPLIT, off by default)

2026-10-30T00:49:48+00:00

The GPU thread (front) takes the CPU's commands, parses command lists and runs the puller; engine method calls and everything behind them (registers, draws, dispatches, the rasterizer and its caches) run in order on a second thread (back), fed through a single-producer single-consumer ring (gpu_split.h). Work the front did on back-owned state (end of command list flushes, channel binds, semaphore releases, syncpoint increments, flush/invalidate requests, presentation) is deferred into the same ring; the front waits for the back only where it needs a result from that state: semaphore acquires and MME DMA reads. EDEN_NX2_SPLIT=1 runs macros on the back. EDEN_NX2_SPLIT=2 runs the 3D and compute macros on the front against copies of the registers they read (Maxwell3D/KeplerCompute Front*), drops state writes that keep a register's value there, and sends the rest. EDEN_NX2_SPLIT_VERIFY=1 compares the copies with the back's registers every 4096 macro calls (0 differences in 40,193 checks in title 1); EDEN_NX2_SPLIT_CHECK=1 logs the stack of any other thread using the Vulkan scheduler while the back runs. Switch 2 titles, Vulkan, non-accurate GPU only. Title 1, 3D attract loop: ~44,000 draws a second on one thread, ~47,400 with EDEN_NX2_SPLIT=1, 50,000-66,500 with EDEN_NX2_SPLIT=2.

Switch 2: suspend channels on semaphore acquires; fix pushbuffer desyncs

2026-10-28T00:53:15+00:00

NVN2 gates command buffers with semaphores the CPU releases after writing them. Eden read past unmet SEMAPHORED acquires, so it executed stale commands and desynchronised. Channels now suspend on an unmet acquire and resume from the same word once it is met (scheduler keeps the waiting channels, the GPU thread polls them), as in changes.patch. Also: methods split across GPFIFO entries around a called command buffer are set aside and resumed; subchannel 2 defaults to inline-to-memory; unbound subchannels and out-of-range compute/DMA methods are dropped instead of crashing; 4-byte semaphore releases no longer write 16 bytes; Ampere SEM_PAYLOAD_HI/SEM_EXECUTE no longer spin as Kepler acquires; unmapped GPU reads log instead of asserting. Debug aids: EDEN_NX2_PB_CHECK (pushbuffer changed after submit), EDEN_NX2_QUERY_TRACE, a one-time pushbuffer dump.

[common] Switch to boost::unordered_flat containers (#4326)

2026-08-31T00:58:09+00:00

Replaces all instances of ankerl's unordered map/set with boost's `unordered_flat_*` classes. This uses std::hash since boost::hash is actually a lot slower. Also adds an abstraction layer in `Common` so future changes are quicker and easier. Other implementation details: - ankerl provided hash specializations for tuple and pair, so those were ported here - std::erase_if doesn't work on boost, so just used the ADL'd erase_if This should be about equal or superior performance as unordered_dense for everything except iteration. Signed-off-by: crueter - [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions). - [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md) - [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability. ------------------- Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4326 Reviewed-by: Lizzie and Samuel Reviewed-by: MaranBr

[video_core, hle] remove redundant parent references in system structs (#3908)

2026-06-23T04:31:25+00:00

reworked a bit to remove references of parent objects and instead pass as arguments to methods to prevent useless reloads Signed-off-by: lizzie Co-authored-by: maufeat Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3908 Reviewed-by: Maufeat Reviewed-by: crueter

[*] change all std::unordered_map and std::unordered_set into ankerl::unordered_dense::map/set variants (#3442)

2026-02-10T02:34:07+00:00

mainly doing this to reduce memory footprint; we all know how nice ankerl::unordered_dense is in theory 4x faster - in practice these maps arent that "hot" anyways so not likely to have much perf gained i just want to reduce mem fragmentation to ease my porting process, plus it helps other platforms as well (ahem weak Mediatek devices) :) Signed-off-by: lizzie Co-authored-by: Caio Oliveira Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3442 Reviewed-by: DraVee Reviewed-by: CamilleLaVey Co-authored-by: lizzie Co-committed-by: lizzie

General: address feedback

2022-10-06T19:00:54+00:00

general: Format licenses as per SPDX guidelines

2022-10-06T19:00:54+00:00

VideoCore: Refactor syncing.

2022-10-06T19:00:52+00:00

VideoCore: implement channels on gpu caches.

2022-10-06T19:00:51+00:00