X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fselection-strategies%2Ffair-share-worker-choice-strategy.ts;h=88e12b94fa8ef50b50ede22026e95f0242000d45;hb=8b7aa4204c27efd1dc699f7baea65b5262bd26b3;hp=c4a0d30beb7fe827d614ca9f434c7470aeb9d018;hpb=baca80f7921f47ead05d194fb782a3e310f4ea41;p=poolifier.git

diff --git a/src/pools/selection-strategies/fair-share-worker-choice-strategy.ts b/src/pools/selection-strategies/fair-share-worker-choice-strategy.ts
index c4a0d30b..88e12b94 100644
--- a/src/pools/selection-strategies/fair-share-worker-choice-strategy.ts
+++ b/src/pools/selection-strategies/fair-share-worker-choice-strategy.ts
@@ -1,21 +1,16 @@
-import {
-  DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
-  DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
-} from '../../utils'
-import type { IPool } from '../pool'
-import type { IWorker } from '../worker'
-import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy'
+import type { IPool } from '../pool.js'
+import type { IWorker } from '../worker.js'
+import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy.js'
 import {
   type IWorkerChoiceStrategy,
   Measurements,
   type TaskStatisticsRequirements,
-  type WorkerChoiceStrategyOptions
-} from './selection-strategies-types'
+  type WorkerChoiceStrategyOptions,
+} from './selection-strategies-types.js'
 
 /**
  * Selects the next worker with a fair share scheduling algorithm.
  * Loosely modeled after the fair queueing algorithm: https://en.wikipedia.org/wiki/Fair_queuing.
- *
  * @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.
@@ -32,25 +27,24 @@ export class FairShareWorkerChoiceStrategy<
     runTime: {
       aggregate: true,
       average: true,
-      median: false
+      median: false,
+    },
+    waitTime: {
+      aggregate: true,
+      average: true,
+      median: false,
     },
-    waitTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS,
     elu: {
       aggregate: true,
       average: true,
-      median: false
-    }
+      median: false,
+    },
   }
 
-  /**
-   * Workers' virtual task end execution timestamp.
-   */
-  private workersVirtualTaskEndTimestamp: number[] = []
-
   /** @inheritDoc */
   public constructor (
     pool: IPool<Worker, Data, Response>,
-    opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS
+    opts?: WorkerChoiceStrategyOptions
   ) {
     super(pool, opts)
     this.setTaskStatisticsRequirements(this.opts)
@@ -58,13 +52,18 @@ export class FairShareWorkerChoiceStrategy<
 
   /** @inheritDoc */
   public reset (): boolean {
-    this.workersVirtualTaskEndTimestamp = []
+    for (const workerNode of this.pool.workerNodes) {
+      delete workerNode.strategyData?.virtualTaskEndTimestamp
+    }
     return true
   }
 
   /** @inheritDoc */
   public update (workerNodeKey: number): boolean {
-    this.computeWorkerVirtualTaskEndTimestamp(workerNodeKey)
+    this.pool.workerNodes[workerNodeKey].strategyData = {
+      virtualTaskEndTimestamp:
+        this.computeWorkerNodeVirtualTaskEndTimestamp(workerNodeKey),
+    }
     return true
   }
 
@@ -76,56 +75,68 @@ export class FairShareWorkerChoiceStrategy<
   }
 
   /** @inheritDoc */
-  public remove (workerNodeKey: number): boolean {
-    this.workersVirtualTaskEndTimestamp.splice(workerNodeKey, 1)
+  public remove (): boolean {
     return true
   }
 
   private fairShareNextWorkerNodeKey (): number | undefined {
-    let chosenWorkerNodeKey: number | undefined
-    let minWorkerVirtualTaskEndTimestamp = Infinity
-    for (const [workerNodeKey] of this.pool.workerNodes.entries()) {
-      if (this.workersVirtualTaskEndTimestamp[workerNodeKey] == null) {
-        this.computeWorkerVirtualTaskEndTimestamp(workerNodeKey)
-      }
-      const workerVirtualTaskEndTimestamp =
-        this.workersVirtualTaskEndTimestamp[workerNodeKey]
-      if (workerVirtualTaskEndTimestamp < minWorkerVirtualTaskEndTimestamp) {
-        minWorkerVirtualTaskEndTimestamp = workerVirtualTaskEndTimestamp
-        chosenWorkerNodeKey = workerNodeKey
-      }
-    }
-    return chosenWorkerNodeKey
+    return this.pool.workerNodes.reduce(
+      (minWorkerNodeKey, workerNode, workerNodeKey, workerNodes) => {
+        if (workerNode.strategyData?.virtualTaskEndTimestamp == null) {
+          workerNode.strategyData = {
+            virtualTaskEndTimestamp:
+              this.computeWorkerNodeVirtualTaskEndTimestamp(workerNodeKey),
+          }
+        }
+        return this.isWorkerNodeReady(workerNodeKey) &&
+          // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+          workerNode.strategyData.virtualTaskEndTimestamp! <
+            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+            workerNodes[minWorkerNodeKey].strategyData!.virtualTaskEndTimestamp!
+          ? workerNodeKey
+          : minWorkerNodeKey
+      },
+      0
+    )
   }
 
   /**
    * Computes the worker node key virtual task end timestamp.
-   *
    * @param workerNodeKey - The worker node key.
+   * @returns The worker node key virtual task end timestamp.
    */
-  private computeWorkerVirtualTaskEndTimestamp (workerNodeKey: number): void {
-    this.workersVirtualTaskEndTimestamp[workerNodeKey] =
-      this.getWorkerVirtualTaskEndTimestamp(
-        workerNodeKey,
-        this.getWorkerVirtualTaskStartTimestamp(workerNodeKey)
-      )
+  private computeWorkerNodeVirtualTaskEndTimestamp (
+    workerNodeKey: number
+  ): number {
+    return this.getWorkerNodeVirtualTaskEndTimestamp(
+      workerNodeKey,
+      this.getWorkerNodeVirtualTaskStartTimestamp(workerNodeKey)
+    )
   }
 
-  private getWorkerVirtualTaskEndTimestamp (
+  private getWorkerNodeVirtualTaskEndTimestamp (
     workerNodeKey: number,
-    workerVirtualTaskStartTimestamp: number
+    workerNodeVirtualTaskStartTimestamp: number
   ): number {
-    const workerTaskRunTime =
-      this.opts.measurement === Measurements.elu
-        ? this.getWorkerTaskElu(workerNodeKey)
-        : this.getWorkerTaskRunTime(workerNodeKey)
-    return workerVirtualTaskStartTimestamp + workerTaskRunTime
+    const workerNodeTaskExecutionTime =
+      this.getWorkerNodeTaskWaitTime(workerNodeKey) +
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      (this.opts!.measurement === Measurements.elu
+        ? this.getWorkerNodeTaskElu(workerNodeKey)
+        : this.getWorkerNodeTaskRunTime(workerNodeKey))
+    return workerNodeVirtualTaskStartTimestamp + workerNodeTaskExecutionTime
   }
 
-  private getWorkerVirtualTaskStartTimestamp (workerNodeKey: number): number {
-    return Math.max(
-      performance.now(),
-      this.workersVirtualTaskEndTimestamp[workerNodeKey] ?? -Infinity
-    )
+  private getWorkerNodeVirtualTaskStartTimestamp (
+    workerNodeKey: number
+  ): number {
+    const virtualTaskEndTimestamp =
+      this.pool.workerNodes[workerNodeKey]?.strategyData
+        ?.virtualTaskEndTimestamp
+    const now = performance.now()
+    return now < (virtualTaskEndTimestamp ?? Number.NEGATIVE_INFINITY)
+      ? // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      virtualTaskEndTimestamp!
+      : now
   }
 }