+import { cpus } from 'node:os'
import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
import type { IPool } from '../pool'
import type { IWorker } from '../worker'
public readonly requiredStatistics: RequiredStatistics = {
runTime: false,
avgRunTime: false,
- medRunTime: false
+ medRunTime: false,
+ waitTime: false,
+ avgWaitTime: false,
+ medWaitTime: false
}
/**
this.choose = this.choose.bind(this)
}
- protected checkOptions (opts: WorkerChoiceStrategyOptions): void {
+ protected setRequiredStatistics (opts: WorkerChoiceStrategyOptions): void {
if (this.requiredStatistics.avgRunTime && opts.medRunTime === true) {
this.requiredStatistics.avgRunTime = false
this.requiredStatistics.medRunTime = opts.medRunTime as boolean
this.requiredStatistics.avgRunTime = true
this.requiredStatistics.medRunTime = opts.medRunTime as boolean
}
- if (
- opts.weights != null &&
- Object.keys(opts.weights).length < this.pool.size
- ) {
- throw new Error(
- 'Worker choice strategy options must have a weight for each worker node.'
- )
+ if (this.requiredStatistics.avgWaitTime && opts.medWaitTime === true) {
+ this.requiredStatistics.avgWaitTime = false
+ this.requiredStatistics.medWaitTime = opts.medWaitTime as boolean
+ }
+ if (this.requiredStatistics.medWaitTime && opts.medWaitTime === false) {
+ this.requiredStatistics.avgWaitTime = true
+ this.requiredStatistics.medWaitTime = opts.medWaitTime as boolean
}
}
/** @inheritDoc */
public setOptions (opts: WorkerChoiceStrategyOptions): void {
opts = opts ?? DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
- this.checkOptions(opts)
+ this.setRequiredStatistics(opts)
this.opts = opts
}
return this.findFirstFreeWorkerNodeKey()
}
+ /**
+ * Gets the worker task runtime.
+ * If the required statistics are `avgRunTime`, the average runtime is returned.
+ * If the required statistics are `medRunTime`, the median runtime is returned.
+ *
+ * @param workerNodeKey - The worker node key.
+ * @returns The worker task runtime.
+ */
+ protected getWorkerTaskRunTime (workerNodeKey: number): number {
+ return this.requiredStatistics.medRunTime
+ ? this.pool.workerNodes[workerNodeKey].tasksUsage.medRunTime
+ : this.pool.workerNodes[workerNodeKey].tasksUsage.avgRunTime
+ }
+
+ /**
+ * Gets the worker task wait time.
+ * If the required statistics are `avgWaitTime`, the average wait time is returned.
+ * If the required statistics are `medWaitTime`, the median wait time is returned.
+ *
+ * @param workerNodeKey - The worker node key.
+ * @returns The worker task wait time.
+ */
+ protected getWorkerWaitTime (workerNodeKey: number): number {
+ return this.requiredStatistics.medWaitTime
+ ? this.pool.workerNodes[workerNodeKey].tasksUsage.medWaitTime
+ : this.pool.workerNodes[workerNodeKey].tasksUsage.avgWaitTime
+ }
+
+ 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)
+ }
+
/**
* Finds the first free worker node key based on the number of tasks the worker has applied.
*
// return this.workerNodes.findLastIndex(workerNode => {
// return workerNode.tasksUsage.running === 0
// })
- for (let i = this.pool.workerNodes.length - 1; i >= 0; i--) {
- if (this.pool.workerNodes[i].tasksUsage.running === 0) {
- return i
+ for (
+ let workerNodeKey = this.pool.workerNodes.length - 1;
+ workerNodeKey >= 0;
+ workerNodeKey--
+ ) {
+ if (this.pool.workerNodes[workerNodeKey].tasksUsage.running === 0) {
+ return workerNodeKey
}
}
return -1