-import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
+import {
+ DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
+ DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+} from '../../utils'
import type { IPool } from '../pool'
import type { IWorker } from '../worker'
import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy'
import type {
IWorkerChoiceStrategy,
- TaskStatistics,
+ TaskStatisticsRequirements,
WorkerChoiceStrategyOptions
} from './selection-strategies-types'
* Selects the worker with the least ELU.
*
* @typeParam Worker - Type of worker which manages the strategy.
- * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
- * @typeParam Response - Type of execution response. This can only be serializable data.
+ * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data.
+ * @typeParam Response - Type of execution response. This can only be structured-cloneable data.
*/
export class LeastEluWorkerChoiceStrategy<
Worker extends IWorker,
extends AbstractWorkerChoiceStrategy<Worker, Data, Response>
implements IWorkerChoiceStrategy {
/** @inheritDoc */
- public readonly taskStatistics: TaskStatistics = {
- runTime: false,
- avgRunTime: false,
- medRunTime: false,
- waitTime: false,
- avgWaitTime: false,
- medWaitTime: false,
- elu: true
+ public readonly taskStatisticsRequirements: TaskStatisticsRequirements = {
+ runTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
+ waitTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
+ elu: {
+ aggregate: true,
+ average: false,
+ median: false
+ }
}
/** @inheritDoc */
opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
) {
super(pool, opts)
- this.setTaskStatistics(this.opts)
+ this.setTaskStatisticsRequirements(this.opts)
}
/** @inheritDoc */
}
/** @inheritDoc */
- public choose (): number {
+ public choose (): number | undefined {
+ this.nextWorkerNodeKey = this.leastEluNextWorkerNodeKey()
+ return this.nextWorkerNodeKey
+ }
+
+ /** @inheritDoc */
+ public remove (): boolean {
+ return true
+ }
+
+ private leastEluNextWorkerNodeKey (): number | undefined {
let minWorkerElu = Infinity
- let leastEluWorkerNodeKey!: number
+ let chosenWorkerNodeKey: number | undefined
for (const [workerNodeKey, workerNode] of this.pool.workerNodes.entries()) {
- const workerUsage = workerNode.workerUsage
- const workerElu = workerUsage.elu?.utilization ?? 0
+ if (!this.isWorkerNodeEligible(workerNodeKey)) {
+ continue
+ }
+ const workerUsage = workerNode.usage
+ const workerElu = workerUsage.elu?.active?.aggregate ?? 0
if (workerElu === 0) {
- return workerNodeKey
+ chosenWorkerNodeKey = workerNodeKey
+ break
} else if (workerElu < minWorkerElu) {
minWorkerElu = workerElu
- leastEluWorkerNodeKey = workerNodeKey
+ chosenWorkerNodeKey = workerNodeKey
}
}
- return leastEluWorkerNodeKey
- }
-
- /** @inheritDoc */
- public remove (): boolean {
- return true
+ return chosenWorkerNodeKey
}
}