doe_log.c: add vm_name/vm_id_hex identity columns; new calibration workload · 41918a28a4 - LithosAnanake

doe_log.c: add vm_name/vm_id_hex identity columns; new calibration workload

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Adds the identity columns HB-ON's existing per-tick CSV logger
(doe_log_tick_row(), doe_log.c) was missing. Previously every column
described *a* VM's state each row, but nothing said which VM emitted
it -- concurrent VMs' rows were indistinguishable by source. Two new
first columns, vm_name and vm_id_hex, resolved via a reverse lookup on
vm->stadium_vm_id (capsule_vm_registry_get()).

Real bug found and fixed while building this: the freestanding
snprintf here silently prints the literal format string instead of
substituting for %016llx (width+ll+hex unsupported) -- caught by
reading the actual emitted row, not assumed to work. Replaced with a
hand-rolled hex nibble-table loop, the same idiom vm_uuid_format()/
MINT-SCRATCH-EMIT already use.

Corrects FABRIC-3.md's own prior "still not started: CSV driver"
framing: no bespoke CSV emitter is needed for the multiuser DoE at
all -- this per-tick logger already exists, fires automatically inside
every VM's own execution loop, and just needed HB-ON plus these
identity columns to be usable for concurrent workers. Also corrects
doe_log.h's own stale doc comment claiming g_doe_log_enabled defaults
to 1 -- doe_log.c's own source is authoritative: 0, off by default,
matching the HB-ON/HB-OFF naming.

One real, honest limitation recorded rather than smoothed over:
vm_name reads blank for any tick captured during a WORKER-BIRTH'd
capsule's own self-execution at birth time, since capsule_birth_baby()
runs that work (and its heartbeat ticks) before the registry name can
be set. vm_id_hex is unaffected (reads directly from vm->stadium_vm_id)
and still uniquely disambiguates every row -- confirmed live: a
blank-name row's own vm_id_hex matched its later PARITY:KILL line's
vm_id exactly.

New workload-calib1.4th: Bob confirmed the existing 10 workload-N.4th
files aren't fixed. Sized to cross HEARTBEAT_CHECK_FREQUENCY (256
word-executions/tick) many times over while staying far lighter than
RUN-FIB/RUN-CHAOS5, both too slow under TCG for a bounded verification
run. A real, reusable addition, not a throwaway.

Verified live on amd64 via a self-contained one-shot EXEC'd test
(HB-ON, WORKER-BIRTH two calibration workers, HB-OFF, VM-ERROR? on
both, KILL both, completion banner) rather than interactive polling,
which breaks once HB-ON makes the log grow continuously via Hera/
Hermes/Artemis's own background ticks. Clean 3-arch qemu boot on the
real committed change.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BWpNjdwPtFLuVLaAq44L9K

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