*/
ROUND_ROBIN: 'ROUND_ROBIN',
/**
- * Less used worker selection strategy.
+ * Least used worker selection strategy.
*/
- LESS_USED: 'LESS_USED',
+ LEAST_USED: 'LEAST_USED',
/**
- * Less busy worker selection strategy.
+ * Least busy worker selection strategy.
*/
- LESS_BUSY: 'LESS_BUSY',
+ LEAST_BUSY: 'LEAST_BUSY',
+ /**
+ * Least ELU worker selection strategy.
+ *
+ * @experimental
+ */
+ LEAST_ELU: 'LEAST_ELU',
/**
* Fair share worker selection strategy.
*/
/**
* Weighted round robin worker selection strategy.
*/
- WEIGHTED_ROUND_ROBIN: 'WEIGHTED_ROUND_ROBIN'
+ WEIGHTED_ROUND_ROBIN: 'WEIGHTED_ROUND_ROBIN',
+ /**
+ * Interleaved weighted round robin worker selection strategy.
+ *
+ * @experimental
+ */
+ INTERLEAVED_WEIGHTED_ROUND_ROBIN: 'INTERLEAVED_WEIGHTED_ROUND_ROBIN'
} as const)
/**
*/
export type WorkerChoiceStrategy = keyof typeof WorkerChoiceStrategies
+/**
+ * Enumeration of measurements.
+ */
+export const Measurements = Object.freeze({
+ runTime: 'runTime',
+ waitTime: 'waitTime',
+ elu: 'elu'
+} as const)
+
+/**
+ * Measurement.
+ */
+export type Measurement = keyof typeof Measurements
+
+/**
+ * Measurement options.
+ */
+export interface MeasurementOptions {
+ /**
+ * Set measurement median.
+ */
+ median: boolean
+}
+
/**
* Worker choice strategy options.
*/
export interface WorkerChoiceStrategyOptions {
/**
- * Use tasks median run time instead of average run time.
+ * Measurement to use for worker choice strategy.
+ */
+ measurement?: Measurement
+ /**
+ * Runtime options.
+ *
+ * @defaultValue \{ median: false \}
+ */
+ runTime?: MeasurementOptions
+ /**
+ * Wait time options.
*
- * @defaultValue false
+ * @defaultValue \{ median: false \}
*/
- medRunTime?: boolean
+ waitTime?: MeasurementOptions
+ /**
+ * Event loop utilization options.
+ *
+ * @defaultValue \{ median: false \}
+ */
+ elu?: MeasurementOptions
/**
* Worker weights to use for weighted round robin worker selection strategy.
* Weight is the tasks maximum average or median runtime in milliseconds.
}
/**
- * Pool worker tasks usage statistics requirements.
+ * Measurement statistics requirements.
+ *
+ * @internal
+ */
+export interface MeasurementStatisticsRequirements {
+ /**
+ * Require measurement aggregate.
+ */
+ aggregate: boolean
+ /**
+ * Require measurement average.
+ */
+ average: boolean
+ /**
+ * Require measurement median.
+ */
+ median: boolean
+}
+
+/**
+ * Pool worker node worker usage statistics requirements.
*
* @internal
*/
-export interface RequiredStatistics {
+export interface TaskStatisticsRequirements {
+ /**
+ * Tasks runtime requirements.
+ */
+ runTime: MeasurementStatisticsRequirements
/**
- * Require tasks run time.
+ * Tasks wait time requirements.
*/
- runTime: boolean
+ waitTime: MeasurementStatisticsRequirements
/**
- * Require tasks average run time.
+ * Tasks event loop utilization requirements.
*/
- avgRunTime: boolean
+ elu: MeasurementStatisticsRequirements
+}
+
+/**
+ * Strategy policy.
+ *
+ * @internal
+ */
+export interface StrategyPolicy {
/**
- * Require tasks median run time.
+ * Expects direct usage of dynamic worker.
*/
- medRunTime: boolean
+ useDynamicWorker: boolean
}
/**
*/
export interface IWorkerChoiceStrategy {
/**
- * Required tasks usage statistics.
+ * Strategy policy.
+ */
+ readonly strategyPolicy: StrategyPolicy
+ /**
+ * Tasks statistics requirements.
*/
- readonly requiredStatistics: RequiredStatistics
+ readonly taskStatisticsRequirements: TaskStatisticsRequirements
/**
* Resets strategy internals.
*