Commit | Line | Data |
---|---|---|
fc3e6586 | 1 | import crypto from 'node:crypto' |
62c15a68 | 2 | import { performance } from 'node:perf_hooks' |
2740a743 | 3 | import type { MessageValue, PromiseResponseWrapper } from '../utility-types' |
bbeadd16 JB |
4 | import { |
5 | DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS, | |
6 | EMPTY_FUNCTION, | |
0d80593b | 7 | isPlainObject, |
bbeadd16 JB |
8 | median |
9 | } from '../utils' | |
34a0cfab | 10 | import { KillBehaviors, isKillBehavior } from '../worker/worker-options' |
65d7a1c9 | 11 | import { CircularArray } from '../circular-array' |
29ee7e9a | 12 | import { Queue } from '../queue' |
c4855468 | 13 | import { |
65d7a1c9 | 14 | type IPool, |
7c5a1080 | 15 | PoolEmitter, |
c4855468 | 16 | PoolEvents, |
6b27d407 | 17 | type PoolInfo, |
c4855468 | 18 | type PoolOptions, |
6b27d407 JB |
19 | type PoolType, |
20 | PoolTypes, | |
184855e6 JB |
21 | type TasksQueueOptions, |
22 | type WorkerType | |
c4855468 | 23 | } from './pool' |
e102732c JB |
24 | import type { |
25 | IWorker, | |
26 | MessageHandler, | |
27 | Task, | |
28 | WorkerNode, | |
29 | WorkerUsage | |
30 | } from './worker' | |
a35560ba | 31 | import { |
f0d7f803 | 32 | Measurements, |
a35560ba | 33 | WorkerChoiceStrategies, |
a20f0ba5 JB |
34 | type WorkerChoiceStrategy, |
35 | type WorkerChoiceStrategyOptions | |
bdaf31cd JB |
36 | } from './selection-strategies/selection-strategies-types' |
37 | import { WorkerChoiceStrategyContext } from './selection-strategies/worker-choice-strategy-context' | |
c97c7edb | 38 | |
729c563d | 39 | /** |
ea7a90d3 | 40 | * Base class that implements some shared logic for all poolifier pools. |
729c563d | 41 | * |
38e795c1 | 42 | * @typeParam Worker - Type of worker which manages this pool. |
e102732c JB |
43 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
44 | * @typeParam Response - Type of execution response. This can only be structured-cloneable data. | |
729c563d | 45 | */ |
c97c7edb | 46 | export abstract class AbstractPool< |
f06e48d8 | 47 | Worker extends IWorker, |
d3c8a1a8 S |
48 | Data = unknown, |
49 | Response = unknown | |
c4855468 | 50 | > implements IPool<Worker, Data, Response> { |
afc003b2 | 51 | /** @inheritDoc */ |
f06e48d8 | 52 | public readonly workerNodes: Array<WorkerNode<Worker, Data>> = [] |
4a6952ff | 53 | |
afc003b2 | 54 | /** @inheritDoc */ |
7c0ba920 JB |
55 | public readonly emitter?: PoolEmitter |
56 | ||
be0676b3 | 57 | /** |
a3445496 | 58 | * The execution response promise map. |
be0676b3 | 59 | * |
2740a743 | 60 | * - `key`: The message id of each submitted task. |
a3445496 | 61 | * - `value`: An object that contains the worker, the execution response promise resolve and reject callbacks. |
be0676b3 | 62 | * |
a3445496 | 63 | * When we receive a message from the worker, we get a map entry with the promise resolve/reject bound to the message id. |
be0676b3 | 64 | */ |
c923ce56 JB |
65 | protected promiseResponseMap: Map< |
66 | string, | |
67 | PromiseResponseWrapper<Worker, Response> | |
68 | > = new Map<string, PromiseResponseWrapper<Worker, Response>>() | |
c97c7edb | 69 | |
a35560ba | 70 | /** |
51fe3d3c | 71 | * Worker choice strategy context referencing a worker choice algorithm implementation. |
a35560ba S |
72 | */ |
73 | protected workerChoiceStrategyContext: WorkerChoiceStrategyContext< | |
78cea37e JB |
74 | Worker, |
75 | Data, | |
76 | Response | |
a35560ba S |
77 | > |
78 | ||
729c563d S |
79 | /** |
80 | * Constructs a new poolifier pool. | |
81 | * | |
38e795c1 | 82 | * @param numberOfWorkers - Number of workers that this pool should manage. |
029715f0 | 83 | * @param filePath - Path to the worker file. |
38e795c1 | 84 | * @param opts - Options for the pool. |
729c563d | 85 | */ |
c97c7edb | 86 | public constructor ( |
b4213b7f JB |
87 | protected readonly numberOfWorkers: number, |
88 | protected readonly filePath: string, | |
89 | protected readonly opts: PoolOptions<Worker> | |
c97c7edb | 90 | ) { |
78cea37e | 91 | if (!this.isMain()) { |
c97c7edb S |
92 | throw new Error('Cannot start a pool from a worker!') |
93 | } | |
8d3782fa | 94 | this.checkNumberOfWorkers(this.numberOfWorkers) |
c510fea7 | 95 | this.checkFilePath(this.filePath) |
7c0ba920 | 96 | this.checkPoolOptions(this.opts) |
1086026a | 97 | |
7254e419 JB |
98 | this.chooseWorkerNode = this.chooseWorkerNode.bind(this) |
99 | this.executeTask = this.executeTask.bind(this) | |
100 | this.enqueueTask = this.enqueueTask.bind(this) | |
101 | this.checkAndEmitEvents = this.checkAndEmitEvents.bind(this) | |
1086026a | 102 | |
6bd72cd0 | 103 | if (this.opts.enableEvents === true) { |
7c0ba920 JB |
104 | this.emitter = new PoolEmitter() |
105 | } | |
d59df138 JB |
106 | this.workerChoiceStrategyContext = new WorkerChoiceStrategyContext< |
107 | Worker, | |
108 | Data, | |
109 | Response | |
da309861 JB |
110 | >( |
111 | this, | |
112 | this.opts.workerChoiceStrategy, | |
113 | this.opts.workerChoiceStrategyOptions | |
114 | ) | |
b6b32453 JB |
115 | |
116 | this.setupHook() | |
117 | ||
118 | for (let i = 1; i <= this.numberOfWorkers; i++) { | |
119 | this.createAndSetupWorker() | |
120 | } | |
c97c7edb S |
121 | } |
122 | ||
a35560ba | 123 | private checkFilePath (filePath: string): void { |
ffcbbad8 JB |
124 | if ( |
125 | filePath == null || | |
126 | (typeof filePath === 'string' && filePath.trim().length === 0) | |
127 | ) { | |
c510fea7 APA |
128 | throw new Error('Please specify a file with a worker implementation') |
129 | } | |
130 | } | |
131 | ||
8d3782fa JB |
132 | private checkNumberOfWorkers (numberOfWorkers: number): void { |
133 | if (numberOfWorkers == null) { | |
134 | throw new Error( | |
135 | 'Cannot instantiate a pool without specifying the number of workers' | |
136 | ) | |
78cea37e | 137 | } else if (!Number.isSafeInteger(numberOfWorkers)) { |
473c717a | 138 | throw new TypeError( |
0d80593b | 139 | 'Cannot instantiate a pool with a non safe integer number of workers' |
8d3782fa JB |
140 | ) |
141 | } else if (numberOfWorkers < 0) { | |
473c717a | 142 | throw new RangeError( |
8d3782fa JB |
143 | 'Cannot instantiate a pool with a negative number of workers' |
144 | ) | |
6b27d407 | 145 | } else if (this.type === PoolTypes.fixed && numberOfWorkers === 0) { |
8d3782fa JB |
146 | throw new Error('Cannot instantiate a fixed pool with no worker') |
147 | } | |
148 | } | |
149 | ||
7c0ba920 | 150 | private checkPoolOptions (opts: PoolOptions<Worker>): void { |
0d80593b JB |
151 | if (isPlainObject(opts)) { |
152 | this.opts.workerChoiceStrategy = | |
153 | opts.workerChoiceStrategy ?? WorkerChoiceStrategies.ROUND_ROBIN | |
154 | this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy) | |
155 | this.opts.workerChoiceStrategyOptions = | |
156 | opts.workerChoiceStrategyOptions ?? | |
157 | DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS | |
49be33fe JB |
158 | this.checkValidWorkerChoiceStrategyOptions( |
159 | this.opts.workerChoiceStrategyOptions | |
160 | ) | |
1f68cede | 161 | this.opts.restartWorkerOnError = opts.restartWorkerOnError ?? true |
0d80593b JB |
162 | this.opts.enableEvents = opts.enableEvents ?? true |
163 | this.opts.enableTasksQueue = opts.enableTasksQueue ?? false | |
164 | if (this.opts.enableTasksQueue) { | |
165 | this.checkValidTasksQueueOptions( | |
166 | opts.tasksQueueOptions as TasksQueueOptions | |
167 | ) | |
168 | this.opts.tasksQueueOptions = this.buildTasksQueueOptions( | |
169 | opts.tasksQueueOptions as TasksQueueOptions | |
170 | ) | |
171 | } | |
172 | } else { | |
173 | throw new TypeError('Invalid pool options: must be a plain object') | |
7171d33f | 174 | } |
aee46736 JB |
175 | } |
176 | ||
177 | private checkValidWorkerChoiceStrategy ( | |
178 | workerChoiceStrategy: WorkerChoiceStrategy | |
179 | ): void { | |
180 | if (!Object.values(WorkerChoiceStrategies).includes(workerChoiceStrategy)) { | |
b529c323 | 181 | throw new Error( |
aee46736 | 182 | `Invalid worker choice strategy '${workerChoiceStrategy}'` |
b529c323 JB |
183 | ) |
184 | } | |
7c0ba920 JB |
185 | } |
186 | ||
0d80593b JB |
187 | private checkValidWorkerChoiceStrategyOptions ( |
188 | workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | |
189 | ): void { | |
190 | if (!isPlainObject(workerChoiceStrategyOptions)) { | |
191 | throw new TypeError( | |
192 | 'Invalid worker choice strategy options: must be a plain object' | |
193 | ) | |
194 | } | |
49be33fe JB |
195 | if ( |
196 | workerChoiceStrategyOptions.weights != null && | |
6b27d407 | 197 | Object.keys(workerChoiceStrategyOptions.weights).length !== this.maxSize |
49be33fe JB |
198 | ) { |
199 | throw new Error( | |
200 | 'Invalid worker choice strategy options: must have a weight for each worker node' | |
201 | ) | |
202 | } | |
f0d7f803 JB |
203 | if ( |
204 | workerChoiceStrategyOptions.measurement != null && | |
205 | !Object.values(Measurements).includes( | |
206 | workerChoiceStrategyOptions.measurement | |
207 | ) | |
208 | ) { | |
209 | throw new Error( | |
210 | `Invalid worker choice strategy options: invalid measurement '${workerChoiceStrategyOptions.measurement}'` | |
211 | ) | |
212 | } | |
0d80593b JB |
213 | } |
214 | ||
a20f0ba5 JB |
215 | private checkValidTasksQueueOptions ( |
216 | tasksQueueOptions: TasksQueueOptions | |
217 | ): void { | |
0d80593b JB |
218 | if (tasksQueueOptions != null && !isPlainObject(tasksQueueOptions)) { |
219 | throw new TypeError('Invalid tasks queue options: must be a plain object') | |
220 | } | |
f0d7f803 JB |
221 | if ( |
222 | tasksQueueOptions?.concurrency != null && | |
223 | !Number.isSafeInteger(tasksQueueOptions.concurrency) | |
224 | ) { | |
225 | throw new TypeError( | |
226 | 'Invalid worker tasks concurrency: must be an integer' | |
227 | ) | |
228 | } | |
229 | if ( | |
230 | tasksQueueOptions?.concurrency != null && | |
231 | tasksQueueOptions.concurrency <= 0 | |
232 | ) { | |
a20f0ba5 | 233 | throw new Error( |
f0d7f803 | 234 | `Invalid worker tasks concurrency '${tasksQueueOptions.concurrency}'` |
a20f0ba5 JB |
235 | ) |
236 | } | |
237 | } | |
238 | ||
08f3f44c | 239 | /** @inheritDoc */ |
6b27d407 JB |
240 | public get info (): PoolInfo { |
241 | return { | |
242 | type: this.type, | |
184855e6 | 243 | worker: this.worker, |
6b27d407 JB |
244 | minSize: this.minSize, |
245 | maxSize: this.maxSize, | |
246 | workerNodes: this.workerNodes.length, | |
247 | idleWorkerNodes: this.workerNodes.reduce( | |
248 | (accumulator, workerNode) => | |
a4e07f72 JB |
249 | workerNode.workerUsage.tasks.executing === 0 |
250 | ? accumulator + 1 | |
251 | : accumulator, | |
6b27d407 JB |
252 | 0 |
253 | ), | |
254 | busyWorkerNodes: this.workerNodes.reduce( | |
255 | (accumulator, workerNode) => | |
a4e07f72 JB |
256 | workerNode.workerUsage.tasks.executing > 0 |
257 | ? accumulator + 1 | |
258 | : accumulator, | |
6b27d407 JB |
259 | 0 |
260 | ), | |
a4e07f72 | 261 | executedTasks: this.workerNodes.reduce( |
6b27d407 | 262 | (accumulator, workerNode) => |
a4e07f72 JB |
263 | accumulator + workerNode.workerUsage.tasks.executed, |
264 | 0 | |
265 | ), | |
266 | executingTasks: this.workerNodes.reduce( | |
267 | (accumulator, workerNode) => | |
268 | accumulator + workerNode.workerUsage.tasks.executing, | |
6b27d407 JB |
269 | 0 |
270 | ), | |
271 | queuedTasks: this.workerNodes.reduce( | |
df593701 JB |
272 | (accumulator, workerNode) => |
273 | accumulator + workerNode.workerUsage.tasks.queued, | |
6b27d407 JB |
274 | 0 |
275 | ), | |
276 | maxQueuedTasks: this.workerNodes.reduce( | |
277 | (accumulator, workerNode) => | |
df593701 | 278 | accumulator + workerNode.workerUsage.tasks.maxQueued, |
6b27d407 | 279 | 0 |
a4e07f72 JB |
280 | ), |
281 | failedTasks: this.workerNodes.reduce( | |
282 | (accumulator, workerNode) => | |
283 | accumulator + workerNode.workerUsage.tasks.failed, | |
284 | 0 | |
6b27d407 JB |
285 | ) |
286 | } | |
287 | } | |
08f3f44c | 288 | |
8881ae32 JB |
289 | /** |
290 | * Pool type. | |
291 | * | |
292 | * If it is `'dynamic'`, it provides the `max` property. | |
293 | */ | |
294 | protected abstract get type (): PoolType | |
295 | ||
184855e6 JB |
296 | /** |
297 | * Gets the worker type. | |
298 | */ | |
299 | protected abstract get worker (): WorkerType | |
300 | ||
c2ade475 | 301 | /** |
6b27d407 | 302 | * Pool minimum size. |
c2ade475 | 303 | */ |
6b27d407 | 304 | protected abstract get minSize (): number |
ff733df7 JB |
305 | |
306 | /** | |
6b27d407 | 307 | * Pool maximum size. |
ff733df7 | 308 | */ |
6b27d407 | 309 | protected abstract get maxSize (): number |
a35560ba | 310 | |
ffcbbad8 | 311 | /** |
f06e48d8 | 312 | * Gets the given worker its worker node key. |
ffcbbad8 JB |
313 | * |
314 | * @param worker - The worker. | |
f06e48d8 | 315 | * @returns The worker node key if the worker is found in the pool worker nodes, `-1` otherwise. |
ffcbbad8 | 316 | */ |
f06e48d8 JB |
317 | private getWorkerNodeKey (worker: Worker): number { |
318 | return this.workerNodes.findIndex( | |
319 | workerNode => workerNode.worker === worker | |
320 | ) | |
bf9549ae JB |
321 | } |
322 | ||
afc003b2 | 323 | /** @inheritDoc */ |
a35560ba | 324 | public setWorkerChoiceStrategy ( |
59219cbb JB |
325 | workerChoiceStrategy: WorkerChoiceStrategy, |
326 | workerChoiceStrategyOptions?: WorkerChoiceStrategyOptions | |
a35560ba | 327 | ): void { |
aee46736 | 328 | this.checkValidWorkerChoiceStrategy(workerChoiceStrategy) |
b98ec2e6 | 329 | this.opts.workerChoiceStrategy = workerChoiceStrategy |
b6b32453 JB |
330 | this.workerChoiceStrategyContext.setWorkerChoiceStrategy( |
331 | this.opts.workerChoiceStrategy | |
332 | ) | |
333 | if (workerChoiceStrategyOptions != null) { | |
334 | this.setWorkerChoiceStrategyOptions(workerChoiceStrategyOptions) | |
335 | } | |
9c16fb4b | 336 | for (const [workerNodeKey, workerNode] of this.workerNodes.entries()) { |
8604aaab JB |
337 | this.setWorkerNodeTasksUsage( |
338 | workerNode, | |
9c16fb4b | 339 | this.getWorkerUsage(workerNodeKey) |
8604aaab | 340 | ) |
b6b32453 | 341 | this.setWorkerStatistics(workerNode.worker) |
59219cbb | 342 | } |
a20f0ba5 JB |
343 | } |
344 | ||
345 | /** @inheritDoc */ | |
346 | public setWorkerChoiceStrategyOptions ( | |
347 | workerChoiceStrategyOptions: WorkerChoiceStrategyOptions | |
348 | ): void { | |
0d80593b | 349 | this.checkValidWorkerChoiceStrategyOptions(workerChoiceStrategyOptions) |
a20f0ba5 JB |
350 | this.opts.workerChoiceStrategyOptions = workerChoiceStrategyOptions |
351 | this.workerChoiceStrategyContext.setOptions( | |
352 | this.opts.workerChoiceStrategyOptions | |
a35560ba S |
353 | ) |
354 | } | |
355 | ||
a20f0ba5 | 356 | /** @inheritDoc */ |
8f52842f JB |
357 | public enableTasksQueue ( |
358 | enable: boolean, | |
359 | tasksQueueOptions?: TasksQueueOptions | |
360 | ): void { | |
a20f0ba5 | 361 | if (this.opts.enableTasksQueue === true && !enable) { |
ef41a6e6 | 362 | this.flushTasksQueues() |
a20f0ba5 JB |
363 | } |
364 | this.opts.enableTasksQueue = enable | |
8f52842f | 365 | this.setTasksQueueOptions(tasksQueueOptions as TasksQueueOptions) |
a20f0ba5 JB |
366 | } |
367 | ||
368 | /** @inheritDoc */ | |
8f52842f | 369 | public setTasksQueueOptions (tasksQueueOptions: TasksQueueOptions): void { |
a20f0ba5 | 370 | if (this.opts.enableTasksQueue === true) { |
8f52842f JB |
371 | this.checkValidTasksQueueOptions(tasksQueueOptions) |
372 | this.opts.tasksQueueOptions = | |
373 | this.buildTasksQueueOptions(tasksQueueOptions) | |
5baee0d7 | 374 | } else if (this.opts.tasksQueueOptions != null) { |
a20f0ba5 JB |
375 | delete this.opts.tasksQueueOptions |
376 | } | |
377 | } | |
378 | ||
379 | private buildTasksQueueOptions ( | |
380 | tasksQueueOptions: TasksQueueOptions | |
381 | ): TasksQueueOptions { | |
382 | return { | |
383 | concurrency: tasksQueueOptions?.concurrency ?? 1 | |
384 | } | |
385 | } | |
386 | ||
c319c66b JB |
387 | /** |
388 | * Whether the pool is full or not. | |
389 | * | |
390 | * The pool filling boolean status. | |
391 | */ | |
dea903a8 JB |
392 | protected get full (): boolean { |
393 | return this.workerNodes.length >= this.maxSize | |
394 | } | |
c2ade475 | 395 | |
c319c66b JB |
396 | /** |
397 | * Whether the pool is busy or not. | |
398 | * | |
399 | * The pool busyness boolean status. | |
400 | */ | |
401 | protected abstract get busy (): boolean | |
7c0ba920 | 402 | |
6c6afb84 JB |
403 | /** |
404 | * Whether worker nodes are executing at least one task. | |
405 | * | |
406 | * @returns Worker nodes busyness boolean status. | |
407 | */ | |
c2ade475 | 408 | protected internalBusy (): boolean { |
e0ae6100 JB |
409 | return ( |
410 | this.workerNodes.findIndex(workerNode => { | |
a4e07f72 | 411 | return workerNode.workerUsage.tasks.executing === 0 |
e0ae6100 JB |
412 | }) === -1 |
413 | ) | |
cb70b19d JB |
414 | } |
415 | ||
afc003b2 | 416 | /** @inheritDoc */ |
a86b6df1 | 417 | public async execute (data?: Data, name?: string): Promise<Response> { |
b6b32453 | 418 | const timestamp = performance.now() |
20dcad1a | 419 | const workerNodeKey = this.chooseWorkerNode() |
adc3c320 | 420 | const submittedTask: Task<Data> = { |
a86b6df1 | 421 | name, |
e5a5c0fc JB |
422 | // eslint-disable-next-line @typescript-eslint/consistent-type-assertions |
423 | data: data ?? ({} as Data), | |
b6b32453 | 424 | timestamp, |
adc3c320 JB |
425 | id: crypto.randomUUID() |
426 | } | |
2e81254d | 427 | const res = new Promise<Response>((resolve, reject) => { |
02706357 | 428 | this.promiseResponseMap.set(submittedTask.id as string, { |
2e81254d JB |
429 | resolve, |
430 | reject, | |
20dcad1a | 431 | worker: this.workerNodes[workerNodeKey].worker |
2e81254d JB |
432 | }) |
433 | }) | |
ff733df7 JB |
434 | if ( |
435 | this.opts.enableTasksQueue === true && | |
7171d33f | 436 | (this.busy || |
a4e07f72 | 437 | this.workerNodes[workerNodeKey].workerUsage.tasks.executing >= |
7171d33f | 438 | ((this.opts.tasksQueueOptions as TasksQueueOptions) |
3528c992 | 439 | .concurrency as number)) |
ff733df7 | 440 | ) { |
26a929d7 JB |
441 | this.enqueueTask(workerNodeKey, submittedTask) |
442 | } else { | |
2e81254d | 443 | this.executeTask(workerNodeKey, submittedTask) |
adc3c320 | 444 | } |
ff733df7 | 445 | this.checkAndEmitEvents() |
78cea37e | 446 | // eslint-disable-next-line @typescript-eslint/return-await |
280c2a77 S |
447 | return res |
448 | } | |
c97c7edb | 449 | |
afc003b2 | 450 | /** @inheritDoc */ |
c97c7edb | 451 | public async destroy (): Promise<void> { |
1fbcaa7c | 452 | await Promise.all( |
875a7c37 JB |
453 | this.workerNodes.map(async (workerNode, workerNodeKey) => { |
454 | this.flushTasksQueue(workerNodeKey) | |
47aacbaa | 455 | // FIXME: wait for tasks to be finished |
f06e48d8 | 456 | await this.destroyWorker(workerNode.worker) |
1fbcaa7c JB |
457 | }) |
458 | ) | |
c97c7edb S |
459 | } |
460 | ||
4a6952ff | 461 | /** |
6c6afb84 | 462 | * Terminates the given worker. |
4a6952ff | 463 | * |
f06e48d8 | 464 | * @param worker - A worker within `workerNodes`. |
4a6952ff JB |
465 | */ |
466 | protected abstract destroyWorker (worker: Worker): void | Promise<void> | |
c97c7edb | 467 | |
729c563d | 468 | /** |
6677a3d3 JB |
469 | * Setup hook to execute code before worker nodes are created in the abstract constructor. |
470 | * Can be overridden. | |
afc003b2 JB |
471 | * |
472 | * @virtual | |
729c563d | 473 | */ |
280c2a77 | 474 | protected setupHook (): void { |
d99ba5a8 | 475 | // Intentionally empty |
280c2a77 | 476 | } |
c97c7edb | 477 | |
729c563d | 478 | /** |
280c2a77 S |
479 | * Should return whether the worker is the main worker or not. |
480 | */ | |
481 | protected abstract isMain (): boolean | |
482 | ||
483 | /** | |
2e81254d | 484 | * Hook executed before the worker task execution. |
bf9549ae | 485 | * Can be overridden. |
729c563d | 486 | * |
f06e48d8 | 487 | * @param workerNodeKey - The worker node key. |
1c6fe997 | 488 | * @param task - The task to execute. |
729c563d | 489 | */ |
1c6fe997 JB |
490 | protected beforeTaskExecutionHook ( |
491 | workerNodeKey: number, | |
492 | task: Task<Data> | |
493 | ): void { | |
494 | const workerUsage = this.workerNodes[workerNodeKey].workerUsage | |
495 | ++workerUsage.tasks.executing | |
496 | this.updateWaitTimeWorkerUsage(workerUsage, task) | |
c97c7edb S |
497 | } |
498 | ||
c01733f1 | 499 | /** |
2e81254d | 500 | * Hook executed after the worker task execution. |
bf9549ae | 501 | * Can be overridden. |
c01733f1 | 502 | * |
c923ce56 | 503 | * @param worker - The worker. |
38e795c1 | 504 | * @param message - The received message. |
c01733f1 | 505 | */ |
2e81254d | 506 | protected afterTaskExecutionHook ( |
c923ce56 | 507 | worker: Worker, |
2740a743 | 508 | message: MessageValue<Response> |
bf9549ae | 509 | ): void { |
a4e07f72 JB |
510 | const workerUsage = |
511 | this.workerNodes[this.getWorkerNodeKey(worker)].workerUsage | |
f1c06930 JB |
512 | this.updateTaskStatisticsWorkerUsage(workerUsage, message) |
513 | this.updateRunTimeWorkerUsage(workerUsage, message) | |
514 | this.updateEluWorkerUsage(workerUsage, message) | |
515 | } | |
516 | ||
517 | private updateTaskStatisticsWorkerUsage ( | |
518 | workerUsage: WorkerUsage, | |
519 | message: MessageValue<Response> | |
520 | ): void { | |
a4e07f72 JB |
521 | const workerTaskStatistics = workerUsage.tasks |
522 | --workerTaskStatistics.executing | |
523 | ++workerTaskStatistics.executed | |
82f36766 | 524 | if (message.taskError != null) { |
a4e07f72 | 525 | ++workerTaskStatistics.failed |
2740a743 | 526 | } |
f8eb0a2a JB |
527 | } |
528 | ||
a4e07f72 JB |
529 | private updateRunTimeWorkerUsage ( |
530 | workerUsage: WorkerUsage, | |
f8eb0a2a JB |
531 | message: MessageValue<Response> |
532 | ): void { | |
87de9ff5 JB |
533 | if ( |
534 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime | |
932fc8be | 535 | .aggregate |
87de9ff5 | 536 | ) { |
932fc8be | 537 | workerUsage.runTime.aggregate += message.taskPerformance?.runTime ?? 0 |
c6bd2650 | 538 | if ( |
932fc8be JB |
539 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime |
540 | .average && | |
a4e07f72 | 541 | workerUsage.tasks.executed !== 0 |
c6bd2650 | 542 | ) { |
a4e07f72 | 543 | workerUsage.runTime.average = |
f1c06930 JB |
544 | workerUsage.runTime.aggregate / |
545 | (workerUsage.tasks.executed - workerUsage.tasks.failed) | |
3032893a | 546 | } |
3fa4cdd2 | 547 | if ( |
932fc8be JB |
548 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime |
549 | .median && | |
d715b7bc | 550 | message.taskPerformance?.runTime != null |
3fa4cdd2 | 551 | ) { |
a4e07f72 JB |
552 | workerUsage.runTime.history.push(message.taskPerformance.runTime) |
553 | workerUsage.runTime.median = median(workerUsage.runTime.history) | |
78099a15 | 554 | } |
3032893a | 555 | } |
f8eb0a2a JB |
556 | } |
557 | ||
a4e07f72 JB |
558 | private updateWaitTimeWorkerUsage ( |
559 | workerUsage: WorkerUsage, | |
1c6fe997 | 560 | task: Task<Data> |
f8eb0a2a | 561 | ): void { |
1c6fe997 JB |
562 | const timestamp = performance.now() |
563 | const taskWaitTime = timestamp - (task.timestamp ?? timestamp) | |
87de9ff5 JB |
564 | if ( |
565 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime | |
932fc8be | 566 | .aggregate |
87de9ff5 | 567 | ) { |
932fc8be | 568 | workerUsage.waitTime.aggregate += taskWaitTime ?? 0 |
09a6305f | 569 | if ( |
87de9ff5 | 570 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
932fc8be | 571 | .waitTime.average && |
a4e07f72 | 572 | workerUsage.tasks.executed !== 0 |
09a6305f | 573 | ) { |
a4e07f72 | 574 | workerUsage.waitTime.average = |
f1c06930 JB |
575 | workerUsage.waitTime.aggregate / |
576 | (workerUsage.tasks.executed - workerUsage.tasks.failed) | |
09a6305f JB |
577 | } |
578 | if ( | |
87de9ff5 | 579 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
932fc8be | 580 | .waitTime.median && |
1c6fe997 | 581 | taskWaitTime != null |
09a6305f | 582 | ) { |
1c6fe997 | 583 | workerUsage.waitTime.history.push(taskWaitTime) |
a4e07f72 | 584 | workerUsage.waitTime.median = median(workerUsage.waitTime.history) |
09a6305f | 585 | } |
0567595a | 586 | } |
c01733f1 | 587 | } |
588 | ||
a4e07f72 | 589 | private updateEluWorkerUsage ( |
5df69fab | 590 | workerUsage: WorkerUsage, |
62c15a68 JB |
591 | message: MessageValue<Response> |
592 | ): void { | |
5df69fab JB |
593 | if ( |
594 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu | |
595 | .aggregate | |
596 | ) { | |
597 | if (workerUsage.elu != null && message.taskPerformance?.elu != null) { | |
9adcefab JB |
598 | workerUsage.elu.idle.aggregate += message.taskPerformance.elu.idle |
599 | workerUsage.elu.active.aggregate += message.taskPerformance.elu.active | |
5df69fab JB |
600 | workerUsage.elu.utilization = |
601 | (workerUsage.elu.utilization + | |
602 | message.taskPerformance.elu.utilization) / | |
603 | 2 | |
604 | } else if (message.taskPerformance?.elu != null) { | |
605 | workerUsage.elu.idle.aggregate = message.taskPerformance.elu.idle | |
606 | workerUsage.elu.active.aggregate = message.taskPerformance.elu.active | |
607 | workerUsage.elu.utilization = message.taskPerformance.elu.utilization | |
608 | } | |
d715b7bc | 609 | if ( |
5df69fab JB |
610 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu |
611 | .average && | |
612 | workerUsage.tasks.executed !== 0 | |
613 | ) { | |
f1c06930 JB |
614 | const executedTasks = |
615 | workerUsage.tasks.executed - workerUsage.tasks.failed | |
5df69fab | 616 | workerUsage.elu.idle.average = |
f1c06930 | 617 | workerUsage.elu.idle.aggregate / executedTasks |
5df69fab | 618 | workerUsage.elu.active.average = |
f1c06930 | 619 | workerUsage.elu.active.aggregate / executedTasks |
5df69fab JB |
620 | } |
621 | if ( | |
622 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu | |
623 | .median && | |
d715b7bc JB |
624 | message.taskPerformance?.elu != null |
625 | ) { | |
5df69fab JB |
626 | workerUsage.elu.idle.history.push(message.taskPerformance.elu.idle) |
627 | workerUsage.elu.active.history.push(message.taskPerformance.elu.active) | |
628 | workerUsage.elu.idle.median = median(workerUsage.elu.idle.history) | |
629 | workerUsage.elu.active.median = median(workerUsage.elu.active.history) | |
62c15a68 JB |
630 | } |
631 | } | |
632 | } | |
633 | ||
280c2a77 | 634 | /** |
f06e48d8 | 635 | * Chooses a worker node for the next task. |
280c2a77 | 636 | * |
6c6afb84 | 637 | * The default worker choice strategy uses a round robin algorithm to distribute the tasks. |
280c2a77 | 638 | * |
20dcad1a | 639 | * @returns The worker node key |
280c2a77 | 640 | */ |
6c6afb84 | 641 | private chooseWorkerNode (): number { |
930dcf12 | 642 | if (this.shallCreateDynamicWorker()) { |
6c6afb84 JB |
643 | const worker = this.createAndSetupDynamicWorker() |
644 | if ( | |
645 | this.workerChoiceStrategyContext.getStrategyPolicy().useDynamicWorker | |
646 | ) { | |
647 | return this.getWorkerNodeKey(worker) | |
648 | } | |
17393ac8 | 649 | } |
930dcf12 JB |
650 | return this.workerChoiceStrategyContext.execute() |
651 | } | |
652 | ||
6c6afb84 JB |
653 | /** |
654 | * Conditions for dynamic worker creation. | |
655 | * | |
656 | * @returns Whether to create a dynamic worker or not. | |
657 | */ | |
658 | private shallCreateDynamicWorker (): boolean { | |
930dcf12 | 659 | return this.type === PoolTypes.dynamic && !this.full && this.internalBusy() |
c97c7edb S |
660 | } |
661 | ||
280c2a77 | 662 | /** |
675bb809 | 663 | * Sends a message to the given worker. |
280c2a77 | 664 | * |
38e795c1 JB |
665 | * @param worker - The worker which should receive the message. |
666 | * @param message - The message. | |
280c2a77 S |
667 | */ |
668 | protected abstract sendToWorker ( | |
669 | worker: Worker, | |
670 | message: MessageValue<Data> | |
671 | ): void | |
672 | ||
4a6952ff | 673 | /** |
f06e48d8 | 674 | * Registers a listener callback on the given worker. |
4a6952ff | 675 | * |
38e795c1 JB |
676 | * @param worker - The worker which should register a listener. |
677 | * @param listener - The message listener callback. | |
4a6952ff | 678 | */ |
e102732c JB |
679 | private registerWorkerMessageListener<Message extends Data | Response>( |
680 | worker: Worker, | |
681 | listener: (message: MessageValue<Message>) => void | |
682 | ): void { | |
683 | worker.on('message', listener as MessageHandler<Worker>) | |
684 | } | |
c97c7edb | 685 | |
729c563d | 686 | /** |
41344292 | 687 | * Creates a new worker. |
6c6afb84 JB |
688 | * |
689 | * @returns Newly created worker. | |
729c563d | 690 | */ |
280c2a77 | 691 | protected abstract createWorker (): Worker |
c97c7edb | 692 | |
729c563d | 693 | /** |
f06e48d8 | 694 | * Function that can be hooked up when a worker has been newly created and moved to the pool worker nodes. |
6677a3d3 | 695 | * Can be overridden. |
729c563d | 696 | * |
38e795c1 | 697 | * @param worker - The newly created worker. |
729c563d | 698 | */ |
6677a3d3 | 699 | protected afterWorkerSetup (worker: Worker): void { |
e102732c JB |
700 | // Listen to worker messages. |
701 | this.registerWorkerMessageListener(worker, this.workerListener()) | |
702 | } | |
c97c7edb | 703 | |
4a6952ff | 704 | /** |
f06e48d8 | 705 | * Creates a new worker and sets it up completely in the pool worker nodes. |
4a6952ff JB |
706 | * |
707 | * @returns New, completely set up worker. | |
708 | */ | |
709 | protected createAndSetupWorker (): Worker { | |
bdacc2d2 | 710 | const worker = this.createWorker() |
280c2a77 | 711 | |
35cf1c03 | 712 | worker.on('message', this.opts.messageHandler ?? EMPTY_FUNCTION) |
a35560ba | 713 | worker.on('error', this.opts.errorHandler ?? EMPTY_FUNCTION) |
1f68cede JB |
714 | worker.on('error', error => { |
715 | if (this.emitter != null) { | |
716 | this.emitter.emit(PoolEvents.error, error) | |
717 | } | |
5baee0d7 | 718 | if (this.opts.restartWorkerOnError === true) { |
1f68cede | 719 | this.createAndSetupWorker() |
5baee0d7 JB |
720 | } |
721 | }) | |
a35560ba S |
722 | worker.on('online', this.opts.onlineHandler ?? EMPTY_FUNCTION) |
723 | worker.on('exit', this.opts.exitHandler ?? EMPTY_FUNCTION) | |
a974afa6 | 724 | worker.once('exit', () => { |
f06e48d8 | 725 | this.removeWorkerNode(worker) |
a974afa6 | 726 | }) |
280c2a77 | 727 | |
f06e48d8 | 728 | this.pushWorkerNode(worker) |
280c2a77 | 729 | |
b6b32453 JB |
730 | this.setWorkerStatistics(worker) |
731 | ||
280c2a77 S |
732 | this.afterWorkerSetup(worker) |
733 | ||
c97c7edb S |
734 | return worker |
735 | } | |
be0676b3 | 736 | |
930dcf12 JB |
737 | /** |
738 | * Creates a new dynamic worker and sets it up completely in the pool worker nodes. | |
739 | * | |
740 | * @returns New, completely set up dynamic worker. | |
741 | */ | |
742 | protected createAndSetupDynamicWorker (): Worker { | |
743 | const worker = this.createAndSetupWorker() | |
744 | this.registerWorkerMessageListener(worker, message => { | |
e8b3a5ab | 745 | const workerNodeKey = this.getWorkerNodeKey(worker) |
930dcf12 JB |
746 | if ( |
747 | isKillBehavior(KillBehaviors.HARD, message.kill) || | |
7b56f532 JB |
748 | (message.kill != null && |
749 | ((this.opts.enableTasksQueue === false && | |
e8b3a5ab JB |
750 | this.workerNodes[workerNodeKey].workerUsage.tasks.executing === |
751 | 0) || | |
7b56f532 | 752 | (this.opts.enableTasksQueue === true && |
e8b3a5ab JB |
753 | this.workerNodes[workerNodeKey].workerUsage.tasks.executing === |
754 | 0 && | |
755 | this.tasksQueueSize(workerNodeKey) === 0))) | |
930dcf12 JB |
756 | ) { |
757 | // Kill message received from the worker: no new tasks are submitted to that worker for a while ( > maxInactiveTime) | |
930dcf12 JB |
758 | void (this.destroyWorker(worker) as Promise<void>) |
759 | } | |
760 | }) | |
761 | return worker | |
762 | } | |
763 | ||
be0676b3 | 764 | /** |
ff733df7 | 765 | * This function is the listener registered for each worker message. |
be0676b3 | 766 | * |
bdacc2d2 | 767 | * @returns The listener function to execute when a message is received from a worker. |
be0676b3 APA |
768 | */ |
769 | protected workerListener (): (message: MessageValue<Response>) => void { | |
4a6952ff | 770 | return message => { |
b1989cfd | 771 | if (message.id != null) { |
a3445496 | 772 | // Task execution response received |
2740a743 | 773 | const promiseResponse = this.promiseResponseMap.get(message.id) |
b1989cfd | 774 | if (promiseResponse != null) { |
82f36766 | 775 | if (message.taskError != null) { |
91ee39ed | 776 | if (this.emitter != null) { |
82f36766 | 777 | this.emitter.emit(PoolEvents.taskError, message.taskError) |
91ee39ed | 778 | } |
cd9580e7 | 779 | promiseResponse.reject(message.taskError.message) |
a05c10de | 780 | } else { |
2740a743 | 781 | promiseResponse.resolve(message.data as Response) |
a05c10de | 782 | } |
2e81254d | 783 | this.afterTaskExecutionHook(promiseResponse.worker, message) |
2740a743 | 784 | this.promiseResponseMap.delete(message.id) |
ff733df7 JB |
785 | const workerNodeKey = this.getWorkerNodeKey(promiseResponse.worker) |
786 | if ( | |
787 | this.opts.enableTasksQueue === true && | |
416fd65c | 788 | this.tasksQueueSize(workerNodeKey) > 0 |
ff733df7 | 789 | ) { |
2e81254d JB |
790 | this.executeTask( |
791 | workerNodeKey, | |
ff733df7 JB |
792 | this.dequeueTask(workerNodeKey) as Task<Data> |
793 | ) | |
794 | } | |
e5536a06 | 795 | this.workerChoiceStrategyContext.update(workerNodeKey) |
be0676b3 APA |
796 | } |
797 | } | |
798 | } | |
be0676b3 | 799 | } |
7c0ba920 | 800 | |
ff733df7 | 801 | private checkAndEmitEvents (): void { |
1f68cede | 802 | if (this.emitter != null) { |
ff733df7 | 803 | if (this.busy) { |
6b27d407 | 804 | this.emitter?.emit(PoolEvents.busy, this.info) |
ff733df7 | 805 | } |
6b27d407 JB |
806 | if (this.type === PoolTypes.dynamic && this.full) { |
807 | this.emitter?.emit(PoolEvents.full, this.info) | |
ff733df7 | 808 | } |
164d950a JB |
809 | } |
810 | } | |
811 | ||
0ebe2a9f JB |
812 | /** |
813 | * Sets the given worker node its tasks usage in the pool. | |
814 | * | |
815 | * @param workerNode - The worker node. | |
a4e07f72 | 816 | * @param workerUsage - The worker usage. |
0ebe2a9f JB |
817 | */ |
818 | private setWorkerNodeTasksUsage ( | |
819 | workerNode: WorkerNode<Worker, Data>, | |
a4e07f72 | 820 | workerUsage: WorkerUsage |
0ebe2a9f | 821 | ): void { |
a4e07f72 | 822 | workerNode.workerUsage = workerUsage |
0ebe2a9f JB |
823 | } |
824 | ||
a05c10de | 825 | /** |
f06e48d8 | 826 | * Pushes the given worker in the pool worker nodes. |
ea7a90d3 | 827 | * |
38e795c1 | 828 | * @param worker - The worker. |
f06e48d8 | 829 | * @returns The worker nodes length. |
ea7a90d3 | 830 | */ |
f06e48d8 | 831 | private pushWorkerNode (worker: Worker): number { |
9c16fb4b | 832 | this.workerNodes.push({ |
ffcbbad8 | 833 | worker, |
9c16fb4b | 834 | workerUsage: this.getWorkerUsage(), |
29ee7e9a | 835 | tasksQueue: new Queue<Task<Data>>() |
ea7a90d3 | 836 | }) |
9c16fb4b JB |
837 | const workerNodeKey = this.getWorkerNodeKey(worker) |
838 | this.setWorkerNodeTasksUsage( | |
839 | this.workerNodes[workerNodeKey], | |
840 | this.getWorkerUsage(workerNodeKey) | |
841 | ) | |
842 | return this.workerNodes.length | |
ea7a90d3 | 843 | } |
c923ce56 | 844 | |
8604aaab JB |
845 | // /** |
846 | // * Sets the given worker in the pool worker nodes. | |
847 | // * | |
848 | // * @param workerNodeKey - The worker node key. | |
849 | // * @param worker - The worker. | |
850 | // * @param workerUsage - The worker usage. | |
851 | // * @param tasksQueue - The worker task queue. | |
852 | // */ | |
853 | // private setWorkerNode ( | |
854 | // workerNodeKey: number, | |
855 | // worker: Worker, | |
856 | // workerUsage: WorkerUsage, | |
857 | // tasksQueue: Queue<Task<Data>> | |
858 | // ): void { | |
859 | // this.workerNodes[workerNodeKey] = { | |
860 | // worker, | |
861 | // workerUsage, | |
862 | // tasksQueue | |
863 | // } | |
864 | // } | |
51fe3d3c JB |
865 | |
866 | /** | |
f06e48d8 | 867 | * Removes the given worker from the pool worker nodes. |
51fe3d3c | 868 | * |
f06e48d8 | 869 | * @param worker - The worker. |
51fe3d3c | 870 | */ |
416fd65c | 871 | private removeWorkerNode (worker: Worker): void { |
f06e48d8 | 872 | const workerNodeKey = this.getWorkerNodeKey(worker) |
1f68cede JB |
873 | if (workerNodeKey !== -1) { |
874 | this.workerNodes.splice(workerNodeKey, 1) | |
875 | this.workerChoiceStrategyContext.remove(workerNodeKey) | |
876 | } | |
51fe3d3c | 877 | } |
adc3c320 | 878 | |
2e81254d | 879 | private executeTask (workerNodeKey: number, task: Task<Data>): void { |
1c6fe997 | 880 | this.beforeTaskExecutionHook(workerNodeKey, task) |
2e81254d JB |
881 | this.sendToWorker(this.workerNodes[workerNodeKey].worker, task) |
882 | } | |
883 | ||
f9f00b5f | 884 | private enqueueTask (workerNodeKey: number, task: Task<Data>): number { |
29ee7e9a | 885 | return this.workerNodes[workerNodeKey].tasksQueue.enqueue(task) |
adc3c320 JB |
886 | } |
887 | ||
416fd65c | 888 | private dequeueTask (workerNodeKey: number): Task<Data> | undefined { |
29ee7e9a | 889 | return this.workerNodes[workerNodeKey].tasksQueue.dequeue() |
adc3c320 JB |
890 | } |
891 | ||
416fd65c | 892 | private tasksQueueSize (workerNodeKey: number): number { |
4d8bf9e4 | 893 | return this.workerNodes[workerNodeKey].tasksQueue.size |
adc3c320 | 894 | } |
ff733df7 | 895 | |
df593701 JB |
896 | private tasksMaxQueueSize (workerNodeKey: number): number { |
897 | return this.workerNodes[workerNodeKey].tasksQueue.maxSize | |
898 | } | |
899 | ||
416fd65c JB |
900 | private flushTasksQueue (workerNodeKey: number): void { |
901 | if (this.tasksQueueSize(workerNodeKey) > 0) { | |
29ee7e9a JB |
902 | for (let i = 0; i < this.tasksQueueSize(workerNodeKey); i++) { |
903 | this.executeTask( | |
904 | workerNodeKey, | |
905 | this.dequeueTask(workerNodeKey) as Task<Data> | |
906 | ) | |
ff733df7 | 907 | } |
ff733df7 | 908 | } |
df593701 | 909 | this.workerNodes[workerNodeKey].tasksQueue.clear() |
ff733df7 JB |
910 | } |
911 | ||
ef41a6e6 JB |
912 | private flushTasksQueues (): void { |
913 | for (const [workerNodeKey] of this.workerNodes.entries()) { | |
914 | this.flushTasksQueue(workerNodeKey) | |
915 | } | |
916 | } | |
b6b32453 JB |
917 | |
918 | private setWorkerStatistics (worker: Worker): void { | |
919 | this.sendToWorker(worker, { | |
920 | statistics: { | |
87de9ff5 JB |
921 | runTime: |
922 | this.workerChoiceStrategyContext.getTaskStatisticsRequirements() | |
932fc8be | 923 | .runTime.aggregate, |
87de9ff5 | 924 | elu: this.workerChoiceStrategyContext.getTaskStatisticsRequirements() |
5df69fab | 925 | .elu.aggregate |
b6b32453 JB |
926 | } |
927 | }) | |
928 | } | |
8604aaab | 929 | |
9c16fb4b | 930 | private getWorkerUsage (workerNodeKey?: number): WorkerUsage { |
e3347a5c JB |
931 | const getTasksQueueSize = (workerNodeKey?: number): number => { |
932 | return workerNodeKey != null ? this.tasksQueueSize(workerNodeKey) : 0 | |
9c16fb4b | 933 | } |
df593701 JB |
934 | const getTasksMaxQueueSize = (workerNodeKey?: number): number => { |
935 | return workerNodeKey != null ? this.tasksMaxQueueSize(workerNodeKey) : 0 | |
936 | } | |
8604aaab | 937 | return { |
9c16fb4b JB |
938 | tasks: { |
939 | executed: 0, | |
940 | executing: 0, | |
941 | get queued (): number { | |
e3347a5c | 942 | return getTasksQueueSize(workerNodeKey) |
9c16fb4b | 943 | }, |
df593701 JB |
944 | get maxQueued (): number { |
945 | return getTasksMaxQueueSize(workerNodeKey) | |
946 | }, | |
9c16fb4b JB |
947 | failed: 0 |
948 | }, | |
8604aaab | 949 | runTime: { |
932fc8be | 950 | aggregate: 0, |
8604aaab JB |
951 | average: 0, |
952 | median: 0, | |
953 | history: new CircularArray() | |
954 | }, | |
955 | waitTime: { | |
932fc8be | 956 | aggregate: 0, |
8604aaab JB |
957 | average: 0, |
958 | median: 0, | |
959 | history: new CircularArray() | |
960 | }, | |
5df69fab JB |
961 | elu: { |
962 | idle: { | |
963 | aggregate: 0, | |
964 | average: 0, | |
965 | median: 0, | |
966 | history: new CircularArray() | |
967 | }, | |
968 | active: { | |
969 | aggregate: 0, | |
970 | average: 0, | |
971 | median: 0, | |
972 | history: new CircularArray() | |
973 | }, | |
974 | utilization: 0 | |
975 | } | |
8604aaab JB |
976 | } |
977 | } | |
c97c7edb | 978 | } |