Follow-up probing narrowed Finding 3's behavior (inconsistent stall point run-to-run: sometimes reaches iters=1000/delta=951 before stopping, sometimes never gets past iters=0 even after a 400-second bounded wait) but didn't pin the mechanism. Tested the strongest available hypothesis: single-threaded TCG scheduling starvation from an -O2-tightened spin loop, based on a real precedent -- calibrate_apic_timer() (apic.c) already calls arch_relax() every iteration of its own spin-wait; calibrate_tsc_with_pmtimer() never had it. Added the same call, matching that precedent exactly. Result: no change, same exact stall point on a fresh 60-second bounded wait. Reverted. Stopping here per this document's own §25.0 rule 5 -- root-causing further needs either deeper TCG/QEMU internals knowledge or a different diagnostic approach (host-side instrumentation) than another guess-and-check pass. Makefile.starkernel and timer.c both back to committed -O0 state, confirmed booting clean. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
83 lines
2.8 KiB
Plaintext
83 lines
2.8 KiB
Plaintext
[2J[001;001H[=3h[2J[001;001H[2J[001;001H[8;042;160t[2J[001;001H[2J[001;001H[8;056;240t[2J[001;001HBdsDxe: loading Boot0002 "UEFI QEMU DVD-ROM QM00005 " from PciRoot(0x0)/Pci(0x1F,0x2)/Sata(0x2,0xFFFF,0x0)
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BdsDxe: starting Boot0002 "UEFI QEMU DVD-ROM QM00005 " from PciRoot(0x0)/Pci(0x1F,0x2)/Sata(0x2,0xFFFF,0x0)
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[2J[001;001H[=3h[2J[001;001HStarKernel UEFI Loader
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Loading kernel from ESP...
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[CKPT 001] Entered efi_main - ConOut live
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RAW SERIAL UP
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[CKPT 002] Serial (COM1) initialized
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Monolithic build - kernel linked directly
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Collecting boot information...
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CmdLine: parsed OK
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[CKPT 004] Command line parsed
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[CKPT 005] Kernel stack allocation decided
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[CKPT 006] Boot info collected (ACPI table located)
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GOP: linear framebuffer found
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[CKPT 007] GOP: linear framebuffer found
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[CKPT 008] About to enter ExitBootServices retry loop
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EBS...
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EBS OK
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Calling kernel_main (monolithic)...
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_____ _ _ __ _
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/ ____| | | |/ / | |
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| (___ | |_ __ _ _ __| ' / ___ _ __ _ __ ___| |
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\___ \| __/ _` | '__| < / _ \ '__| '_ \ / _ \ |
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____) | || (_| | | | . \ __/ | | | | | __/ |
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|_____/ \__\__,_|_| |_|\_\___|_| |_| |_|\___|_|
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LithosAnanke v1.5.4
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Architecture: amd64
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Build: Aug 11 2026 11:31:34
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UEFI BootServices: EXITED
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=== StarKernel Boot Information ===
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Memory map entries: 113
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Total memory: 1023 MB
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Usable memory: 967 MB
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===================================
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PMM initialized.
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PMM statistics:
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Total pages: 248976
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Free pages : 247453
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Used pages : 1523
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Total MB : 972
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Free MB : 966
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Used MB : 5
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VMM initialized (mapped RAM, CR3 switched)
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VMM initialized (mapped RAM, CR3 switched)
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VMM self-test: mapped OK at 0xffff800000000000
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VMM self-test complete.
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IDT installed.
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APIC: init...
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APIC: IA32_APIC_BASE MSR=0x00000000fee00900
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APIC: stale-ISR drain: 0 EOI(s) issued
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APIC: initialized (xAPIC MMIO, TPR=0, SIVR=0x1FF, EOI-clear)
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APIC: init done
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I/O APIC: init...
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I/O APIC: base=0xfec00000, gsi_base=0, overrides=5
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override: source=00 gsi=2 flags=0x0000
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override: source=05 gsi=5 flags=0x000d
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override: source=09 gsi=9 flags=0x000d
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override: source=0a gsi=10 flags=0x000d
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override: source=0b gsi=11 flags=0x000d
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i8042: keyboard ACKed enable-scanning
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i8042: IRQ1 enabled in controller config byte
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I/O APIC: keyboard IRQ1 routed (masked)
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Timer: init...
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Timer: init start
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Timer: PM_TMR_BLK discovered from FADT at port 1544
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Timer: VM mode detected (hypervisor present).
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Timer: HPET calibration disabled (VM-exit MMIO would poison timing).
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Timer: WARNING: invariant TSC not present under hypervisor.
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Timer: continuing in RELATIVE mode (no determinism guarantees).
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Timer: RDTSCP not present; using RDTSC (less serialized).
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Timer: CPUID frequency unavailable; trying PM Timer...
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