-import { cpus } from 'node:os'
import type { IWorker } from '../worker'
import type { IPool } from '../pool'
import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy'
import type {
IWorkerChoiceStrategy,
- RequiredStatistics,
WorkerChoiceStrategyOptions
} from './selection-strategies-types'
>
extends AbstractWorkerChoiceStrategy<Worker, Data, Response>
implements IWorkerChoiceStrategy {
- /** @inheritDoc */
- public readonly requiredStatistics: RequiredStatistics = {
- runTime: true,
- avgRunTime: true,
- medRunTime: false
- }
-
/**
* Worker node id where the current task will be submitted.
*/
opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
) {
super(pool, opts)
- this.checkOptions(this.opts)
+ this.setRequiredStatistics(this.opts)
this.defaultWorkerWeight = this.computeDefaultWorkerWeight()
this.roundWeights = this.getRoundWeights()
}
/** @inheritDoc */
public choose (): number {
- let chosenWorkerNodeKey: number
- const workerWeight =
- this.opts.weights?.[this.currentWorkerNodeId] ?? this.defaultWorkerWeight
- if (workerWeight >= this.roundWeights[this.currentRoundId]) {
- chosenWorkerNodeKey = this.currentWorkerNodeId
- this.currentWorkerNodeId =
- this.currentWorkerNodeId === this.pool.workerNodes.length - 1
- ? 0
- : this.currentWorkerNodeId + 1
- if (this.currentWorkerNodeId === this.pool.workerNodes.length - 1) {
- this.currentRoundId =
- this.currentRoundId === this.roundWeights.length - 1
- ? 0
- : this.currentRoundId + 1
- }
- } else {
- let roundId: number | undefined
- let workerNodeId: number | undefined
+ let roundId: number | undefined
+ let workerNodeId: number | undefined
+ for (
+ let roundIndex = this.currentRoundId;
+ roundIndex < this.roundWeights.length;
+ roundIndex++
+ ) {
for (
- let round = this.currentRoundId;
- round < this.roundWeights.length;
- round++
+ let workerNodeKey = this.currentWorkerNodeId;
+ workerNodeKey < this.pool.workerNodes.length;
+ workerNodeKey++
) {
- for (
- let workerNodeKey = this.currentWorkerNodeId + 1;
- workerNodeKey < this.pool.workerNodes.length;
- workerNodeKey++
- ) {
- const workerWeight =
- this.opts.weights?.[workerNodeKey] ?? this.defaultWorkerWeight
- if (workerWeight >= this.roundWeights[round]) {
- roundId = round
- workerNodeId = workerNodeKey
- break
- }
+ const workerWeight =
+ this.opts.weights?.[workerNodeKey] ?? this.defaultWorkerWeight
+ if (workerWeight >= this.roundWeights[roundIndex]) {
+ roundId = roundIndex
+ workerNodeId = workerNodeKey
+ break
}
}
- this.currentRoundId = roundId ?? 0
- this.currentWorkerNodeId = workerNodeId ?? 0
- chosenWorkerNodeKey = this.currentWorkerNodeId
+ }
+ this.currentRoundId = roundId ?? 0
+ this.currentWorkerNodeId = workerNodeId ?? 0
+ const chosenWorkerNodeKey = this.currentWorkerNodeId
+ if (this.currentWorkerNodeId === this.pool.workerNodes.length - 1) {
+ this.currentWorkerNodeId = 0
+ this.currentRoundId =
+ this.currentRoundId === this.roundWeights.length - 1
+ ? 0
+ : this.currentRoundId + 1
+ } else {
+ this.currentWorkerNodeId = this.currentWorkerNodeId + 1
}
return chosenWorkerNodeKey
}
if (this.currentWorkerNodeId === workerNodeKey) {
if (this.pool.workerNodes.length === 0) {
this.currentWorkerNodeId = 0
- } else {
- this.currentWorkerNodeId =
- this.currentWorkerNodeId > this.pool.workerNodes.length - 1
- ? this.pool.workerNodes.length - 1
- : this.currentWorkerNodeId
+ } else if (this.currentWorkerNodeId > this.pool.workerNodes.length - 1) {
+ this.currentWorkerNodeId = this.pool.workerNodes.length - 1
+ this.currentRoundId =
+ this.currentRoundId === this.roundWeights.length - 1
+ ? 0
+ : this.currentRoundId + 1
}
}
return true
this.roundWeights = this.getRoundWeights()
}
- private 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)
- }
-
private getRoundWeights (): number[] {
if (this.opts.weights == null) {
return [this.defaultWorkerWeight]