Robert Allan JamesandClaude Opus 5.5
acea36ea55
- Investigation (riscv64): completions are slow, not lost -- up to 15 ms, while the ~1M-iteration bound was ~14 ms of guest time. Each timeout left the request in the device while the driver forgot it; the next request took its used entry as its own and returned before its own I/O finished, and so did every later one (394 in one boot), rewriting descriptors the device was still reading. - Fix: VBLK_TIMEOUT_MS (2 s) on the raw hardware counter; each request waits for exactly one more used entry; a timed-out request stays outstanding and its completion is drained before anything is reused, or the next request is refused untouched. Counters for timeouts, late drains and busy refusals. - After the fix, all three ISAs: 0 timeouts, 0 unaccounted completions over 1,912 I/Os; riscv64 slowest completion 7.7 ms (was 15.1). - Standard sequence on amd64/aarch64/riscv64: hash, G, ledger unchanged; 0 timeouts in the riscv64 log. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
include/starkernel/
Headers for LithosAnanke, the bare-metal UEFI kernel (src/starkernel/).
Built only via Makefile.starkernel; gated by __STARKERNEL__ when shared
with hosted code.
uefi.h— UEFI protocol/type definitions consumed by the loader.elf64.h,elf_loader.h— ELF64 parsing and kernel-image loading.boot_info_offsets.h— struct-offset constants shared between the assembly bootstrap and the C boot path.arch.h,apic.h,timer.h— architecture init, APIC interrupt controller, timer (TSC/HPET/APIC, 100 Hz heartbeat).console.h,framebuffer.h,vt100.h— UART 16550 console, framebuffer driver, and VT100 terminal emulation over the framebuffer.pmm.h,vmm.h,kmalloc.h— physical memory manager (bitmap allocator), 4-level x86_64 paging, kernel heap allocator.pci.h,virtio_blk.h— PCI enumeration and the VirtIO block device driver (disk backend for the kernel block subsystem).capsule.h,capsule_birth.h,capsule_loader.h,capsule_run.h,capsule_vm_physics.h,capsule_generated.h— capsule system types, birth protocol, physics-runtime capsule bindings, and the build-time- generated capsule directory (seetools/mkcapsule.c).kernel_args.h,cmdline.h— boot-time kernel argument parsing (starforth.cfg/ command line).repl.h— kernel REPL.log.h,doe_log.h— kernel logging and DoE metrics logging.q48_16.h— kernel-build copy of Q48.16 fixed-point arithmetic.xxhash64.h— content-addressing hash used for capsule IDs.hal_memory.h— hardware-abstraction-layer memory interface.
Subdirectories:
hal/— top-level hardware-abstraction-layer interface.vm/— kernel VM subsystem headers (capsule arena, parity logging, bootstrap wiring).freestanding/— minimal libc-shim headers (assert.h,ctype.h,errno.h,inttypes.h,math.h,sched.h,signal.h,stdio.h,stdlib.h,string.h,time.h,sys/time.h,sys/types.h) for building shared VM code in the freestanding kernel environment, where no real libc is available.