X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Fpools%2Fworker-node.ts;h=f3ec3be3d83f4541da3713cbd46406d19be41ac0;hb=6e9c39d3eedabc9f12808490983d36e551a75a28;hp=116fb8448d8435ecb98c5573bb781f258026e589;hpb=dd95187664018669192560e65e3b996a8143b699;p=poolifier.git

diff --git a/src/pools/worker-node.ts b/src/pools/worker-node.ts
index 116fb844..f3ec3be3 100644
--- a/src/pools/worker-node.ts
+++ b/src/pools/worker-node.ts
@@ -1,7 +1,12 @@
 import { MessageChannel } from 'node:worker_threads'
 import { CircularArray } from '../circular-array'
 import type { Task } from '../utility-types'
-import { DEFAULT_TASK_NAME, once } from '../utils'
+import {
+  DEFAULT_TASK_NAME,
+  EMPTY_FUNCTION,
+  exponentialDelay,
+  sleep
+} from '../utils'
 import { Deque } from '../deque'
 import {
   type IWorker,
@@ -12,6 +17,9 @@ import {
   type WorkerUsage
 } from './worker'
 
+type EmptyQueueCallback = (workerId: number) => void
+type BackPressureCallback = EmptyQueueCallback
+
 /**
  * Worker node.
  *
@@ -25,17 +33,18 @@ implements IWorkerNode<Worker, Data> {
   /** @inheritdoc */
   public readonly info: WorkerInfo
   /** @inheritdoc */
-  public messageChannel?: MessageChannel
-  /** @inheritdoc */
   public usage: WorkerUsage
   /** @inheritdoc */
+  public messageChannel?: MessageChannel
+  /** @inheritdoc */
   public tasksQueueBackPressureSize: number
   /** @inheritdoc */
-  public onBackPressure?: (workerId: number) => void
+  public onBackPressure?: BackPressureCallback
   /** @inheritdoc */
-  public onEmptyQueue?: (workerId: number) => void
-  private readonly taskFunctionsUsage: Map<string, WorkerUsage>
+  public onEmptyQueue?: EmptyQueueCallback
   private readonly tasksQueue: Deque<Task<Data>>
+  private onEmptyQueueCount: number
+  private readonly taskFunctionsUsage: Map<string, WorkerUsage>
 
   /**
    * Constructs a new worker node.
@@ -69,13 +78,14 @@ implements IWorkerNode<Worker, Data> {
     }
     this.worker = worker
     this.info = this.initWorkerInfo(worker, workerType)
+    this.usage = this.initWorkerUsage()
     if (workerType === WorkerTypes.thread) {
       this.messageChannel = new MessageChannel()
     }
-    this.usage = this.initWorkerUsage()
-    this.taskFunctionsUsage = new Map<string, WorkerUsage>()
-    this.tasksQueue = new Deque<Task<Data>>()
     this.tasksQueueBackPressureSize = tasksQueueBackPressureSize
+    this.tasksQueue = new Deque<Task<Data>>()
+    this.onEmptyQueueCount = 0
+    this.taskFunctionsUsage = new Map<string, WorkerUsage>()
   }
 
   /** @inheritdoc */
@@ -87,7 +97,7 @@ implements IWorkerNode<Worker, Data> {
   public enqueueTask (task: Task<Data>): number {
     const tasksQueueSize = this.tasksQueue.push(task)
     if (this.onBackPressure != null && this.hasBackPressure()) {
-      once(this.onBackPressure, this)(this.info.id as number)
+      this.onBackPressure(this.info.id as number)
     }
     return tasksQueueSize
   }
@@ -96,7 +106,7 @@ implements IWorkerNode<Worker, Data> {
   public unshiftTask (task: Task<Data>): number {
     const tasksQueueSize = this.tasksQueue.unshift(task)
     if (this.onBackPressure != null && this.hasBackPressure()) {
-      once(this.onBackPressure, this)(this.info.id as number)
+      this.onBackPressure(this.info.id as number)
     }
     return tasksQueueSize
   }
@@ -105,7 +115,7 @@ implements IWorkerNode<Worker, Data> {
   public dequeueTask (): Task<Data> | undefined {
     const task = this.tasksQueue.shift()
     if (this.onEmptyQueue != null && this.tasksQueue.size === 0) {
-      once(this.onEmptyQueue, this)(this.info.id as number)
+      this.startOnEmptyQueue().catch(EMPTY_FUNCTION)
     }
     return task
   }
@@ -114,7 +124,7 @@ implements IWorkerNode<Worker, Data> {
   public popTask (): Task<Data> | undefined {
     const task = this.tasksQueue.pop()
     if (this.onEmptyQueue != null && this.tasksQueue.size === 0) {
-      once(this.onEmptyQueue, this)(this.info.id as number)
+      this.startOnEmptyQueue().catch(EMPTY_FUNCTION)
     }
     return task
   }
@@ -170,6 +180,20 @@ implements IWorkerNode<Worker, Data> {
     return this.taskFunctionsUsage.get(name)
   }
 
+  private async startOnEmptyQueue (): Promise<void> {
+    if (
+      this.onEmptyQueueCount > 0 &&
+      (this.usage.tasks.executing > 0 || this.tasksQueue.size > 0)
+    ) {
+      this.onEmptyQueueCount = 0
+      return
+    }
+    (this.onEmptyQueue as EmptyQueueCallback)(this.info.id as number)
+    ++this.onEmptyQueueCount
+    await sleep(exponentialDelay(this.onEmptyQueueCount))
+    await this.startOnEmptyQueue()
+  }
+
   private initWorkerInfo (worker: Worker, workerType: WorkerType): WorkerInfo {
     return {
       id: this.getWorkerId(worker, workerType),
@@ -196,6 +220,7 @@ implements IWorkerNode<Worker, Data> {
         get maxQueued (): number {
           return getTasksQueueMaxSize()
         },
+        stolen: 0,
         failed: 0
       },
       runTime: {
@@ -236,6 +261,7 @@ implements IWorkerNode<Worker, Data> {
         get queued (): number {
           return getTaskFunctionQueueSize()
         },
+        stolen: 0,
         failed: 0
       },
       runTime: {