Module config 

Userspace configuration, validated scheduling constants written into BPF rodata.

Config is the single validated set of scheduling constants; the BPF side reads them from const volatile rodata globals declared in src/bpf/main.bpf.c (see src/bpf/intf.h for the compile-time defaults, which are the source of truth for every value here).

The scheduler is knob-free. The production path uses Config::default() validated by Config::validate(). ConfigBuilder exists only to drive the validation contract from the unit tests.

Structs

Config

Validated scheduling constants.

Constants

AGING_PERIOD_NS 🔒

Aging period.

ALPHA 🔒

Climb aggressiveness, fixed.

BUDGET_MAX_NS 🔒

EMA gauge ceiling.

DISPATCH_MAX_BATCH 🔒

EMA_HALF_LIFE_NS 🔒

EMA decay half-life.

HYSTERESIS_SLEEP_NS 🔒

LONG_SLEEP_NS 🔒

A sleep longer than this collapses the gauge.

NSEC_PER_MSEC 🔒

NSEC_PER_SEC 🔒

NSEC_PER_USEC 🔒

Time units matching enum mlfq_consts in src/bpf/intf.h.

PREEMPT_SLICE_NS 🔒

Slice cap for a preempting wakeup, in nsecs. The displaced task resumes at the next scheduling event once the cap expires.

Q1_QUOTA 🔒

Dispatch quotas.

Q1_SLICE_NS 🔒

Per-queue request sizes.

Q2_QUOTA 🔒

Q2_SLICE_NS 🔒

Q3_SLICE_NS 🔒

RTDL_DRAIN_INTERVAL_NS 🔒

Drain interval of the realtime-takeover evacuation, nsecs.

SAMEQ_PREEMPT_MIN_RUN_NS 🔒

Minimum residency before a same-queue wakeup may preempt the running task. Zero, the default, makes the interactive rule unconditional.

SHORT_SLEEP_NS 🔒

Short-sleep boost window. Periodic wakeup cadences such as the 60 Hz frame interval stay interactive. The per-task boost rate limit bounds the churn. The value is set against the slowest common cadence, so faster refresh rates, which sleep less per frame, fall inside the window as well.

SHORT_SLEEP_RATE_LIMIT_NS 🔒

TREE_T_BOUND_NS 🔒

TREE_T_INT_NS 🔒

Tree band edges, the rodata bases of the effective adaptation values.

T_H_NS 🔒

T_L_NS 🔒

Classification thresholds.