-import { cpus } from 'node:os'
-import {
- DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
- DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
-} from '../../utils'
-import type { IPool } from '../pool'
-import type { IWorker } from '../worker'
+import type { IPool } from '../pool.js'
+import { DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS } from '../utils.js'
+import type { IWorker } from '../worker.js'
import type {
IWorkerChoiceStrategy,
StrategyPolicy,
TaskStatisticsRequirements,
- WorkerChoiceStrategyOptions
-} from './selection-strategies-types'
+ WorkerChoiceStrategyOptions,
+} from './selection-strategies-types.js'
+import {
+ buildWorkerChoiceStrategyOptions,
+ toggleMedianMeasurementStatisticsRequirements,
+} from './selection-strategies-utils.js'
/**
* Worker choice strategy abstract base class.
- *
* @typeParam Worker - Type of worker which manages the strategy.
* @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.
Data = unknown,
Response = unknown
> implements IWorkerChoiceStrategy {
- // /**
- // * Toggles finding the last free worker node key.
- // */
- // private toggleFindLastFreeWorkerNodeKey: boolean = false
+ /**
+ * The next worker node key.
+ */
+ protected nextWorkerNodeKey: number | undefined = 0
/**
- * Id of the next worker node.
+ * The previous worker node key.
*/
- protected nextWorkerNodeId: number = 0
+ protected previousWorkerNodeKey = 0
/** @inheritDoc */
public readonly strategyPolicy: StrategyPolicy = {
- useDynamicWorker: false
+ dynamicWorkerUsage: false,
+ dynamicWorkerReady: true,
}
/** @inheritDoc */
public readonly taskStatisticsRequirements: TaskStatisticsRequirements = {
runTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
waitTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
- elu: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS
+ elu: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
}
/**
* Constructs a worker choice strategy bound to the pool.
- *
* @param pool - The pool instance.
* @param opts - The worker choice strategy options.
*/
public constructor (
protected readonly pool: IPool<Worker, Data, Response>,
- protected opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ protected opts?: WorkerChoiceStrategyOptions
) {
this.choose = this.choose.bind(this)
+ this.setOptions(this.opts)
}
protected setTaskStatisticsRequirements (
- opts: WorkerChoiceStrategyOptions
+ opts: WorkerChoiceStrategyOptions | undefined
): void {
- if (
- this.taskStatisticsRequirements.runTime.average &&
- opts.runTime?.median === true
- ) {
- this.taskStatisticsRequirements.runTime.average = false
- this.taskStatisticsRequirements.runTime.median = opts.runTime
- .median as boolean
- }
- if (
- this.taskStatisticsRequirements.runTime.median &&
- opts.runTime?.median === false
- ) {
- this.taskStatisticsRequirements.runTime.average = true
- this.taskStatisticsRequirements.runTime.median = opts.runTime
- .median as boolean
- }
- if (
- this.taskStatisticsRequirements.waitTime.average &&
- opts.waitTime?.median === true
- ) {
- this.taskStatisticsRequirements.waitTime.average = false
- this.taskStatisticsRequirements.waitTime.median = opts.waitTime
- .median as boolean
- }
- if (
- this.taskStatisticsRequirements.waitTime.median &&
- opts.waitTime?.median === false
- ) {
- this.taskStatisticsRequirements.waitTime.average = true
- this.taskStatisticsRequirements.waitTime.median = opts.waitTime
- .median as boolean
- }
- if (
- this.taskStatisticsRequirements.elu.average &&
- opts.elu?.median === true
- ) {
- this.taskStatisticsRequirements.elu.average = false
- this.taskStatisticsRequirements.elu.median = opts.elu.median as boolean
- }
- if (
- this.taskStatisticsRequirements.elu.median &&
- opts.elu?.median === false
- ) {
- this.taskStatisticsRequirements.elu.average = true
- this.taskStatisticsRequirements.elu.median = opts.elu.median as boolean
- }
+ toggleMedianMeasurementStatisticsRequirements(
+ this.taskStatisticsRequirements.runTime,
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ opts!.runTime!.median
+ )
+ toggleMedianMeasurementStatisticsRequirements(
+ this.taskStatisticsRequirements.waitTime,
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ opts!.waitTime!.median
+ )
+ toggleMedianMeasurementStatisticsRequirements(
+ this.taskStatisticsRequirements.elu,
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ opts!.elu!.median
+ )
+ }
+
+ protected resetWorkerNodeKeyProperties (): void {
+ this.nextWorkerNodeKey = 0
+ this.previousWorkerNodeKey = 0
}
/** @inheritDoc */
public abstract update (workerNodeKey: number): boolean
/** @inheritDoc */
- public abstract choose (): number
+ public abstract choose (): number | undefined
/** @inheritDoc */
public abstract remove (workerNodeKey: number): boolean
/** @inheritDoc */
- public setOptions (opts: WorkerChoiceStrategyOptions): void {
- this.opts = opts ?? DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+ public setOptions (opts: WorkerChoiceStrategyOptions | undefined): void {
+ this.opts = buildWorkerChoiceStrategyOptions<Worker, Data, Response>(
+ this.pool,
+ opts
+ )
this.setTaskStatisticsRequirements(this.opts)
}
- // /**
- // * Finds a free worker node key.
- // *
- // * @returns The free worker node key or `-1` if there is no free worker node.
- // */
- // protected findFreeWorkerNodeKey (): number {
- // if (this.toggleFindLastFreeWorkerNodeKey) {
- // this.toggleFindLastFreeWorkerNodeKey = false
- // return this.findLastFreeWorkerNodeKey()
- // }
- // this.toggleFindLastFreeWorkerNodeKey = true
- // return this.findFirstFreeWorkerNodeKey()
- // }
+ /**
+ * Whether the worker node is ready or not.
+ * @param workerNodeKey - The worker node key.
+ * @returns Whether the worker node is ready or not.
+ */
+ protected isWorkerNodeReady (workerNodeKey: number): boolean {
+ return this.pool.workerNodes[workerNodeKey]?.info?.ready ?? false
+ }
+
+ /**
+ * Check the next worker node key.
+ */
+ protected checkNextWorkerNodeKey (): void {
+ if (
+ this.nextWorkerNodeKey != null &&
+ (this.nextWorkerNodeKey < 0 ||
+ !this.isWorkerNodeReady(this.nextWorkerNodeKey))
+ ) {
+ delete this.nextWorkerNodeKey
+ }
+ }
/**
- * Gets the worker task runtime.
+ * Gets the worker node task runtime.
* If the task statistics require the average runtime, the average runtime is returned.
- * If the task statistics require the median runtime , the median runtime is returned.
- *
+ * If the task statistics require the median runtime, the median runtime is returned.
* @param workerNodeKey - The worker node key.
- * @returns The worker task runtime.
+ * @returns The worker node task runtime.
*/
- protected getWorkerTaskRunTime (workerNodeKey: number): number {
+ protected getWorkerNodeTaskRunTime (workerNodeKey: number): number {
return this.taskStatisticsRequirements.runTime.median
- ? this.pool.workerNodes[workerNodeKey].usage.runTime.median
- : this.pool.workerNodes[workerNodeKey].usage.runTime.average
+ ? this.pool.workerNodes[workerNodeKey].usage.runTime.median ?? 0
+ : this.pool.workerNodes[workerNodeKey].usage.runTime.average ?? 0
}
/**
- * Gets the worker task wait time.
+ * Gets the worker node task wait time.
* If the task statistics require the average wait time, the average wait time is returned.
* If the task statistics require the median wait time, the median wait time is returned.
- *
* @param workerNodeKey - The worker node key.
- * @returns The worker task wait time.
+ * @returns The worker node task wait time.
*/
- protected getWorkerTaskWaitTime (workerNodeKey: number): number {
+ protected getWorkerNodeTaskWaitTime (workerNodeKey: number): number {
return this.taskStatisticsRequirements.waitTime.median
- ? this.pool.workerNodes[workerNodeKey].usage.waitTime.median
- : this.pool.workerNodes[workerNodeKey].usage.waitTime.average
+ ? this.pool.workerNodes[workerNodeKey].usage.waitTime.median ?? 0
+ : this.pool.workerNodes[workerNodeKey].usage.waitTime.average ?? 0
}
/**
- * Gets the worker task ELU.
+ * Gets the worker node task ELU.
* If the task statistics require the average ELU, the average ELU is returned.
* If the task statistics require the median ELU, the median ELU is returned.
- *
* @param workerNodeKey - The worker node key.
- * @returns The worker task ELU.
+ * @returns The worker node task ELU.
*/
- protected getWorkerTaskElu (workerNodeKey: number): number {
+ protected getWorkerNodeTaskElu (workerNodeKey: number): number {
return this.taskStatisticsRequirements.elu.median
- ? this.pool.workerNodes[workerNodeKey].usage.elu.active.median
- : this.pool.workerNodes[workerNodeKey].usage.elu.active.average
+ ? this.pool.workerNodes[workerNodeKey].usage.elu.active.median ?? 0
+ : this.pool.workerNodes[workerNodeKey].usage.elu.active.average ?? 0
}
- protected computeDefaultWorkerWeight (): number {
- let cpusCycleTimeWeight = 0
- for (const cpu of cpus()) {
- // CPU estimated cycle time
- const numberOfDigits = cpu.speed.toString().length - 1
- const cpuCycleTime = 1 / (cpu.speed / Math.pow(10, numberOfDigits))
- cpusCycleTimeWeight += cpuCycleTime * Math.pow(10, numberOfDigits)
- }
- return Math.round(cpusCycleTimeWeight / cpus().length)
+ /**
+ * Sets safely the previous worker node key.
+ * @param workerNodeKey - The worker node key.
+ */
+ protected setPreviousWorkerNodeKey (workerNodeKey: number | undefined): void {
+ this.previousWorkerNodeKey =
+ workerNodeKey != null && workerNodeKey >= 0
+ ? workerNodeKey
+ : this.previousWorkerNodeKey
}
-
- // /**
- // * Finds the first free worker node key based on the number of tasks the worker has applied.
- // *
- // * If a worker is found with `0` executing tasks, it is detected as free and its worker node key is returned.
- // *
- // * If no free worker is found, `-1` is returned.
- // *
- // * @returns A worker node key if there is one, `-1` otherwise.
- // */
- // private findFirstFreeWorkerNodeKey (): number {
- // return this.pool.workerNodes.findIndex(workerNode => {
- // return workerNode.usage.tasks.executing === 0
- // })
- // }
-
- // /**
- // * Finds the last free worker node key based on the number of tasks the worker has applied.
- // *
- // * If a worker is found with `0` executing tasks, it is detected as free and its worker node key is returned.
- // *
- // * If no free worker is found, `-1` is returned.
- // *
- // * @returns A worker node key if there is one, `-1` otherwise.
- // */
- // private findLastFreeWorkerNodeKey (): number {
- // // It requires node >= 18.0.0:
- // // return this.workerNodes.findLastIndex(workerNode => {
- // // return workerNode.usage.tasks.executing === 0
- // // })
- // for (
- // let workerNodeKey = this.pool.workerNodes.length - 1;
- // workerNodeKey >= 0;
- // workerNodeKey--
- // ) {
- // if (this.pool.workerNodes[workerNodeKey].usage.tasks.executing === 0) {
- // return workerNodeKey
- // }
- // }
- // return -1
- // }
}