Minecraft Dungeons II (PPSA16064)

[JJenkx]

Tested Minecraft Dungeons II (PPSA16064) natively on Linux 7.2.9 / Ryzen 9 7950X / Radeon RX 6650 XT, RADV Mesa 26.2.4. Unreal Engine. Short bring-up check.

Result

On plain main e0e57a3270, with no pull requests or environment variables on top, the title runs for 240 s with no driver stop. It shows the loading art and then the first-run Accessibility settings (language, tutorial hints, cloud save, credits, privacy). The settings react to input: my scripted Cross presses changed the text language to German.

It runs at about 0.3 FPS.

Where the time goes

perf over 8 s at about 120 s: 14% of all samples are in the comparison lambda of GuestMemory::WriteChanged, plus libc memcmp/memcpy. They come from StorageTexture::writeBackLayers ← StorageTexture::FlushPending ← FlushForAccess ← syncRange ← GuestBufferMemory::AcquireRegistered ← ShaderResources::prepareAddressBindings, in each address-based draw, plus refreshHeapMirrors.

So every draw with address-based bindings writes pending storage images back to guest memory and compares them byte for byte. That is a different hot path from the per-dispatch heap-mirror copy (takeHeapReferences) reported for Mortal Shell II (#8844) and Echoes of the End. #6636 (reuse address-based draw builds) touches this area but currently conflicts with main, so it was not tested.

Not verified

Gameplay (not reached at this frame rate), audio by ear, and saves.

AI-assisted testing and report: yes, Claude Code.