Rewires main.c's live scheduling loop onto the new core-driven
architecture: xce_sched_driver_translate_pending_events() (task 5.1)
-> xce_core_begin_session() -> plugin_begin_session()+sched_account_jobs()
-> xce_core_signal_go() -> decision-drain via the registered
xce_core_decision_cb_t -> plugin_end_session() -> xce_core_end_session(),
all in the new exported xce_sched_driver_run_normal_mode_round()
(driver.c), replacing the old inline sched_update()+sched_begin_session()
+sched_go()+switch+sched_end_session() sequence.
xce_core_go() (task 4.4) is split into xce_core_begin_session()/
xce_core_signal_go() -- a pure decomposition (xce_core_go() itself is
now defined in terms of both, task 4.4's approved test suite passes
unmodified) -- specifically so the driver can interleave
plugin_begin_session()/sched_account_jobs() in the exact safety-critical
window task 4.4 deliberately excluded from pure-core scope: after the
resval reset, strictly before the picker thread is signaled. This is
empirically proven by test_driver_session_ordering.c via real
cross-thread happens-before assertions, not just documented.
xce_sched_driver_on_decision() is the new registered callback:
DISPATCH/PEND forward to the existing sched_publish_dispatch()/
sched_publish_pend_reason(); PREEMPT fails loudly (-ENOSYS, logged)
since no xcecli_preempt() client API exists and nothing in the live
allocator produces one yet (scheduler-preemption's territory).
Adds a --sim CLI flag (parse-only, loud not-yet-implemented failure,
since SimDriver is Phase 3).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019dw5WnN3DXStaEaPYfACU1
Rongsong Shen
062cf40d29
