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outcome retries): the r439 evidence shows a first attempt breaking its poll on a stale value (qmd_rel=0x5 from the previous launch's engine write, want=6) while the engine never fetched the deposit (sentinel intact) - the host then shipped a completion for a launch that did not run; zeroing forces the poll to wait for this launch's own engine write, so the timeout ladder and the software-authored completion are the honest path and the wedge classification can no longer be satisfied by a stale value
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file existed); wedge_ab same-program vs second-launch discriminator
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Looking Glass status
- tools/cuda-ab/frame_producer.cu: renders an animated Julia frame on the
guest GPU and publishes it into the ivshmem BAR (the kvmfr 128 MiB window)
with a small header + RGBA payload.
- tools/lg/frame_reader.py: host-side reader of /dev/shm/kvmfr-<uuid> that
saves each published frame as a PPM (the transport half of the frame path).
- tools/guest-diag/egl_frame.c: EGL probe (device/surfaceless/default
platforms) - live result: eglQueryDevicesEXT sees the NVIDIA device and
eglInitialize succeeds, but eglMakeCurrent fails EGL_BAD_ALLOC (0x3003),
the same VASpace-allocation wall as Xorg's 'Failed to allocate VASpace
object'.
- docs/05-operations/06: the state, the blockers and the exact remaining
pieces (guest GL VASpace allocation; LGMP session producer).
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