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macOS README: soak results

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Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XsESshRCoBoUVWV9qKURUF
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Git Sagar 2026-09-09 13:27:40 -03:00
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@ -83,6 +83,19 @@ and `vmix-install.sh`; every event is logged with a reason):
`tools/soak.sh <flake> macos.images.tahoe.upstream 3` rebuilds an image N
times and tabulates outcome, duration, boots, resets, panics and retries.
Measured 2026-09-09 on the build host (Ryzen 7 7840HS, ZFS), Tahoe 26.6.2,
VirtualSMC-only, PE install — 3 of 3 builds completed:
| run | minutes | kernel boots | prepare tries | panics (self-recovered) | reboot deaths |
|-----|---------|--------------|---------------|-------------------------|---------------|
| 1 | 30 | 8 | 1 | 2 | 0 |
| 2 | 26 | 7 | 1 | 1 | 0 |
| 3 | 26 | 7 | 1 | 1 | 0 |
What still happens: a kernel panic at one of the guest's own reboots during the
install (GPF in launchd's context right after `MACH Reboot`). XNU reboots
itself within seconds and the install continues; the driver only intervenes
if no kernel comes back within 60 s. Known, logged, not yet root-caused.
## Debugging