refactor: factor out common code in worker choice strategies

[poolifier.git] / src / pools / selection-strategies / abstract-worker-choice-strategy.ts

diff --git a/src/pools/selection-strategies/abstract-worker-choice-strategy.ts b/src/pools/selection-strategies/abstract-worker-choice-strategy.ts
index d969f0c0ad5ca224de0d30356d517821b1e76c3c..6e798fbc4349d98bf5b5761d884013382efa601f 100644 (file)
--- a/src/pools/selection-strategies/abstract-worker-choice-strategy.ts
+++ b/src/pools/selection-strategies/abstract-worker-choice-strategy.ts
@@ -1,3 +1,4 @@
+import { cpus } from 'node:os'
 import { DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS } from '../../utils'
 import type { IPool } from '../pool'
 import type { IWorker } from '../worker'
@@ -27,7 +28,10 @@ export abstract class AbstractWorkerChoiceStrategy<
   public readonly requiredStatistics: RequiredStatistics = {
     runTime: false,
     avgRunTime: false,
-    medRunTime: false
+    medRunTime: false,
+    waitTime: false,
+    avgWaitTime: false,
+    medWaitTime: false
   }
 
   /**
@@ -52,6 +56,14 @@ export abstract class AbstractWorkerChoiceStrategy<
       this.requiredStatistics.avgRunTime = true
       this.requiredStatistics.medRunTime = opts.medRunTime as boolean
     }
+    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 */
@@ -101,6 +113,31 @@ export abstract class AbstractWorkerChoiceStrategy<
       : 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.
    *