docs(gust): two-level partition scheduler + tiered supervision design — FOR REVIEW, do not merge (gale#63)#175
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docs(gust): two-level partition scheduler + tiered supervision design — FOR REVIEW, do not merge (gale#63)#175avrabe wants to merge 1 commit into
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… (gale#63) Validated with jess on gale#63: outer ARINC 653 fixed-priority time-partitioned preemptive backbone + inner cooperative kiln-async inside a bounded partition window; safety lives in the outer timer + Health Monitor, not inner good behaviour (non-maskable window-end preemption contains a hogging task by construction). 3-core RT1176 map: M7 flight / M4 estimation / F100 = cross-core HM. Two-tier HM (per-core 653 window-end + independent F100 backstop + wdg-thin IWDG module backstop). Small verified switch/HM core (seL4-MCS scheduling-context shape); synth stays out of the flight TCB. Honesty constraints baked in (from the verified-scheduling research survey): DWT is measurement-based high-water-mark NOT certification-grade WCET; migration stays below the safety line (static F100 redundancy, not dynamic); reject Vestal-style mixed-criticality dropping; verified ≠ timing-verified. gale-side critical path = the async executor (epic #3), Embassy-class, Verus: no-lost-wakeups / bounded-poll / fair-ready-queue. v1 = static single-partition slice (unblocked NOW); v2 rides meld#326 reloc-consumer (gale-side reloc cores already solved, gale#168). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Design doc for review — not for merge yet (brainstorming-gated; awaiting your approval before an implementation plan).
Captures the partition-scheduler design validated with jess on gale#63:
Doc:
docs/superpowers/specs/2026-07-11-gust-partition-scheduler-design.md. Please review; on approval I'll turn it into an implementation plan (executor + Verus harness first).🤖 Generated with Claude Code