| name | 0.7.2-understand-current_delay |
| description | [0.7.2] The computed wait interval for the current retry iteration; derived from base_delay multiplied by backoff_mult |
understand-current_delay
CALL NUMBER: deep_spinlock.current_delay : deep_exponential_backoff(4)
DEFINITION: The computed wait interval for the current retry iteration; derived from base_delay multiplied by backoff_multiplier raised to the iteration count, then capped by delay_ceiling.
Invoke this skill to understand current_delay down to its primitives. The RELATIVE ROOT below is the least-fixed-point closure of everything it bundles from — the full import cone, grouped by the lib each prim comes from. Projected from a prover-typed KB (MAP/SWI-Prolog consistency gate): every reference below resolves.
THE RELATIVE ROOT (the import cone, by lib)
from deep_exponential_backoff
- djt_min_delay (d2): Lower bound of the uniform sampling range in decorrelated jitter; typically derived from base_delay and serves as the floor below which no wait interval may fall, ensuring at least a minimal pause before retry.
- djt_bounding_range (d3): The closed interval [min_delay, previous_delay times decorrelation_factor] from which the uniform random sample is drawn to compute the next current_delay; bounds the worst-case wait while allowing history-dependent growth.
- djt_random_uniform_sample (d4): The uniform random draw within the bounding range that produces the new current_delay value; the randomness decorrelates this thread's retry timing from concurrent threads.
- djt_wave_attenuation (d5): The emergent property that decorrelated jitter reduces the probability of simultaneous retries among competing threads; achieved through per-thread history-dependent ranges that diverge over time.
from deep_spinlock
- backoff_multiplier (d1): Scaling factor (commonly 2.0) that multiplies the current delay on each failed acquisition attempt to produce the next delay interval.
- base_delay (d1): Initial wait time in nanoseconds or microseconds before the first lock acquisition retry; the starting point of the exponential schedule.
- delay_ceiling (d1): Upper bound cap on the computed delay; prevents unbounded growth of wait times when contention persists across many iterations.
CONSUMERS (what needs this)
exponential_backoff
Projected from the concurrency synchronization primitives and memory models KB (407 concepts / 477 relations) — consistency-typed by MAP; the facet list after the colon IS the cross-lib dependency web.
(leaf — this is an actual skill.)
