wehub-resource-sync
109 lines
4.7 KiB
Swift
109 lines
4.7 KiB
Swift
import Foundation
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/// Mean/median/p95 of staleness (seconds since the last simulated refresh) observed at each
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/// historical menu-open event. `p95` uses nearest-rank: samples are sorted ascending and index
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/// `ceil(0.95 * n) - 1` (clamped to the last index) is reported — the same convention most
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/// dashboards use for small-to-medium sample counts, and simple enough to hand-verify in tests.
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public struct StalenessStats: Sendable, Equatable {
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public let mean: Double
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public let median: Double
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public let p95: Double
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public let sampleCount: Int
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public init(mean: Double, median: Double, p95: Double, sampleCount: Int) {
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self.mean = mean
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self.median = median
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self.p95 = p95
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self.sampleCount = sampleCount
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}
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init?(samples: [Double]) {
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guard !samples.isEmpty else { return nil }
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let sorted = samples.sorted()
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self.init(
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mean: sorted.reduce(0, +) / Double(sorted.count),
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median: Self.percentile(sorted, fraction: 0.5),
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p95: Self.percentile(sorted, fraction: 0.95),
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sampleCount: sorted.count)
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}
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private static func percentile(_ sorted: [Double], fraction: Double) -> Double {
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let rank = Int((fraction * Double(sorted.count)).rounded(.up))
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return sorted[max(0, min(sorted.count - 1, rank - 1))]
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}
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}
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/// Whether a policy honored the "never refresh faster than 30 minutes while constrained (low
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/// power or serious/critical thermal)" rule at every simulated decision point where the input was
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/// constrained.
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public struct ConstrainedCompliance: Sendable, Equatable {
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public let constrainedDecisionCount: Int
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public let violationCount: Int
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public init(constrainedDecisionCount: Int, violationCount: Int) {
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self.constrainedDecisionCount = constrainedDecisionCount
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self.violationCount = violationCount
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}
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public var isCompliant: Bool {
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self.violationCount == 0
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}
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}
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public struct ReplayMetrics: Sendable, Equatable {
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public let policyName: String
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public let simulatedSpanSeconds: TimeInterval
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public let totalRefreshCount: Int
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public let refreshCountPer24h: Double
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public let stalenessAtMenuOpen: StalenessStats?
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public let constrainedCompliance: ConstrainedCompliance
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/// How many of `totalRefreshCount` were pulled forward by a menu-open interaction rather than
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/// firing on the policy's own previously scheduled cadence — i.e. how many times
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/// `ReplayEngine.run` took the `advancesOnInteraction` branch for this policy. Always `0` for
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/// policies that report `advancesOnInteraction == false` (see `ReplayPolicy`).
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public let interactionAdvanceCount: Int
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/// Unconstrained replayed decisions with a known transcript-write observation under five minutes old.
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public let codingActiveDecisionCount: Int
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/// Unconstrained active decisions whose selected delay exceeded the five-minute acceptance cap.
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public let codingActiveDelayViolationCount: Int
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/// Number of independently simulated awake/run segments contributing to these metrics.
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public let segmentCount: Int
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/// Wall-clock time excluded after an expected timer deadline because the app was unobserved.
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public let excludedGapSeconds: TimeInterval
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/// Menu opens before a segment's first recorded refresh, excluded equally for every policy.
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public let boundaryCensoredMenuOpenCount: Int
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public init(
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policyName: String,
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simulatedSpanSeconds: TimeInterval,
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totalRefreshCount: Int,
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refreshCountPer24h: Double,
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stalenessAtMenuOpen: StalenessStats?,
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constrainedCompliance: ConstrainedCompliance,
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interactionAdvanceCount: Int = 0,
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codingActiveDecisionCount: Int = 0,
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codingActiveDelayViolationCount: Int = 0,
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segmentCount: Int = 1,
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excludedGapSeconds: TimeInterval = 0,
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boundaryCensoredMenuOpenCount: Int = 0)
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{
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self.policyName = policyName
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self.simulatedSpanSeconds = simulatedSpanSeconds
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self.totalRefreshCount = totalRefreshCount
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self.refreshCountPer24h = refreshCountPer24h
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self.stalenessAtMenuOpen = stalenessAtMenuOpen
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self.constrainedCompliance = constrainedCompliance
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self.interactionAdvanceCount = interactionAdvanceCount
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self.codingActiveDecisionCount = codingActiveDecisionCount
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self.codingActiveDelayViolationCount = codingActiveDelayViolationCount
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self.segmentCount = segmentCount
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self.excludedGapSeconds = excludedGapSeconds
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self.boundaryCensoredMenuOpenCount = boundaryCensoredMenuOpenCount
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}
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}
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struct ReplayRun: Sendable {
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let metrics: ReplayMetrics
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let stalenessSamples: [Double]
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}
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