X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Futils.ts;h=a7cb55f971483d12729e259110b3d872da7b5f15;hb=a4d25410764bca884efaea4d46ed9bf83b8a8dbb;hp=25233a022aac69f9db858907261ad6720e5e495e;hpb=26ce26ca8861318068427cc86697103e7a3ddbf4;p=poolifier.git

diff --git a/src/utils.ts b/src/utils.ts
index 25233a02..a7cb55f9 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,13 +1,15 @@
 import * as os from 'node:os'
-import { getRandomValues } from 'node:crypto'
+import { getRandomValues, randomInt } from 'node:crypto'
 import { Worker as ClusterWorker } from 'node:cluster'
 import { Worker as ThreadWorker } from 'node:worker_threads'
+import { cpus } from 'node:os'
 import type {
-  InternalWorkerChoiceStrategyOptions,
-  MeasurementStatisticsRequirements
-} from './pools/selection-strategies/selection-strategies-types'
-import type { KillBehavior } from './worker/worker-options'
-import { type IWorker, type WorkerType, WorkerTypes } from './pools/worker'
+  MeasurementStatisticsRequirements,
+  WorkerChoiceStrategyOptions
+} from './pools/selection-strategies/selection-strategies-types.js'
+import type { KillBehavior } from './worker/worker-options.js'
+import { type IWorker, type WorkerType, WorkerTypes } from './pools/worker.js'
+import type { IPool } from './pools/pool.js'
 
 /**
  * Default task name.
@@ -21,23 +23,6 @@ export const EMPTY_FUNCTION: () => void = Object.freeze(() => {
   /* Intentionally empty */
 })
 
-/**
- * Default worker choice strategy options.
- *
- * @param poolMaxSize - The pool maximum size.
- * @returns The default worker choice strategy options.
- */
-export const getDefaultInternalWorkerChoiceStrategyOptions = (
-  poolMaxSize: number
-): InternalWorkerChoiceStrategyOptions => {
-  return {
-    retries: poolMaxSize,
-    runTime: { median: false },
-    waitTime: { median: false },
-    elu: { median: false }
-  }
-}
-
 /**
  * Default measurement statistics requirements.
  */
@@ -280,3 +265,70 @@ export const once = <T, A extends any[], R>(
     return result
   }
 }
+
+export const getWorkerChoiceStrategyRetries = <
+  Worker extends IWorker,
+  Data,
+  Response
+>(
+    pool: IPool<Worker, Data, Response>,
+    opts?: WorkerChoiceStrategyOptions
+  ): number => {
+  return (
+    pool.info.maxSize +
+    Object.keys(opts?.weights ?? getDefaultWeights(pool.info.maxSize)).length
+  )
+}
+
+const clone = <T>(object: T): T => {
+  return structuredClone<T>(object)
+}
+
+export const buildWorkerChoiceStrategyOptions = <
+  Worker extends IWorker,
+  Data,
+  Response
+>(
+    pool: IPool<Worker, Data, Response>,
+    opts?: WorkerChoiceStrategyOptions
+  ): WorkerChoiceStrategyOptions => {
+  opts = clone(opts ?? {})
+  opts.weights = opts?.weights ?? getDefaultWeights(pool.info.maxSize)
+  return {
+    ...{
+      runTime: { median: false },
+      waitTime: { median: false },
+      elu: { median: false }
+    },
+    ...opts
+  }
+}
+
+const getDefaultWeights = (
+  poolMaxSize: number,
+  defaultWorkerWeight?: number
+): Record<number, number> => {
+  defaultWorkerWeight = defaultWorkerWeight ?? getDefaultWorkerWeight()
+  const weights: Record<number, number> = {}
+  for (let workerNodeKey = 0; workerNodeKey < poolMaxSize; workerNodeKey++) {
+    weights[workerNodeKey] = defaultWorkerWeight
+  }
+  return weights
+}
+
+const getDefaultWorkerWeight = (): number => {
+  const cpuSpeed = randomInt(500, 2500)
+  let cpusCycleTimeWeight = 0
+  for (const cpu of cpus()) {
+    if (cpu.speed == null || cpu.speed === 0) {
+      cpu.speed =
+        cpus().find(cpu => cpu.speed != null && cpu.speed !== 0)?.speed ??
+        cpuSpeed
+    }
+    // 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)
+}