hxwandClaude Opus 5.5 5a537d5d39 LR-BEHAV-GPU: no render is inside the GPU driver when the app quits (issue #620) ...

A render still running on a worker thread while the process exits crashes in the
driver (SIGSEGV in the NVIDIA Vulkan driver on Linux), where neither the panic
hook nor catch_unwind helps: pool workers were detached, the devices are statics
that are never dropped, and nothing on the way out waited for GPU work.

- gpu: every entry into a device (render, device creation, pool trim, denoise
  runner and tiles) is counted as work in flight (exit.rs). begin_shutdown()
  lets nothing new in; wait_idle(timeout) waits for what is inside.
- preview: JobPool keeps its workers. shutdown(timeout) and Drop discard the
  queued jobs and wait, bounded, for the running ones (2 s on drop); never for
  the calling thread, and not twice.
- engine: a render job caught by the shutdown gives up instead of rendering on
  the CPU, so quitting doesn't wait for it.
- app: on_exit ends with LightcraftApp::shutdown (2 s for everything), after
  settings and library are saved; the macOS menu-bar Quit goes through on_exit.

Not changed: the export, merge, denoise and import threads are still detached;
their GPU work goes through the gate, their CPU work is cut off at exit as before.

Tests: pool drop waits / is bounded / survives a panicked job and its own job
dropping it; the gate; GPU renders refused and the device not created after
begin_shutdown; the app's shutdown leaves no render worker. The crash itself
needs Linux + NVIDIA and was not reproduced here (Windows, DX12): 9 of 9 quits
of the app mid-render exit with code 0 in under 0.8 s.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

2026-10-10 00:46:24 -05:00

..

src

LR-BEHAV-GPU: no render is inside the GPU driver when the app quits (issue #620)

2026-10-10 00:46:24 -05:00

Cargo.toml

M1.5: thumbnail/preview cache (disk + memory LRU, prioritized job pool)

2026-09-30 23:51:47 -04:00