Robert Allan JamesandClaude Opus 5.5
5bc7b4dee7
- New spinlock primitive (spinlock.h/.c): CAS on an owner word (core+1), interrupts masked while any lock is held (state kept in the per-core block, so release order doesn't matter). Recursion, release-not-held, held-at-switch and destroyed-while-held are counted and logged, never silent. Locks are no-ops until the boot core's block is installed (riscv64's monolithic early boot prints before sk_percpu_boot_init()). - Kernel locks in a documented order: hermes, switch, registry, doe, log, console, heap, vmm, pmm. sf_mutex (dict_lock/tuning_lock) uses the same lock word. - Hermes: public functions over *_locked internals; never held across the drain's vm_interpret_kind(); switch notifications after dropping the lock; event payload moved off static storage. Switch table and registry never call out while held (slot/entry copied under the lock). - No lock crosses a switch: checked at context switch (leave, resume) and the idle point. - Probe (removed): every lock balances on all three ISAs; 0 held at switch over 7.5M-51M checks; 0 recursions, 0 bad releases. - Standard sequence on amd64/aarch64/riscv64: hashes and G byte-identical to MC-0a, MINT/WIREBIND/USE ok, conservation true, 0 idle growth. - Block subsystem split out as MC-0b2 (Captain Bob's ruling). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
experiments/
Design of Experiments (DoE) campaign data and analysis for the LithosAnanke kernel.
bare_metal/— the bare-metal DoE experiment: blind full-factorial 2⁴ runs measuring the L8 Jacquard mode selector's effect on the Steady-State Machine across amd64/aarch64/riscv64. Seeexperiments/bare_metal/README.mdfor the full directory layout (runs/,latest/,analysis/{charts,tables,report}).
Hosted-VM DoE campaigns (factorial/heartbeat/ablation studies) live under
docs/working/experiments/ instead — this top-level directory is
specifically the kernel/bare-metal side.