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0bbf65c3 | 1 | import { cpus } from 'node:os' |
3c93feb9 JB |
2 | import { |
3 | DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS, | |
4 | DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS | |
5 | } from '../../utils' | |
08f3f44c | 6 | import type { IPool } from '../pool' |
f06e48d8 | 7 | import type { IWorker } from '../worker' |
10fcfaf4 JB |
8 | import type { |
9 | IWorkerChoiceStrategy, | |
57441b79 | 10 | MeasurementStatisticsRequirements, |
6c6afb84 | 11 | StrategyPolicy, |
87de9ff5 | 12 | TaskStatisticsRequirements, |
da309861 | 13 | WorkerChoiceStrategyOptions |
10fcfaf4 | 14 | } from './selection-strategies-types' |
bdaf31cd JB |
15 | |
16 | /** | |
9cd39dd4 | 17 | * Worker choice strategy abstract base class. |
bdaf31cd | 18 | * |
38e795c1 | 19 | * @typeParam Worker - Type of worker which manages the strategy. |
e102732c JB |
20 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
21 | * @typeParam Response - Type of execution response. This can only be structured-cloneable data. | |
bdaf31cd JB |
22 | */ |
23 | export abstract class AbstractWorkerChoiceStrategy< | |
f06e48d8 | 24 | Worker extends IWorker, |
b2b1d84e JB |
25 | Data = unknown, |
26 | Response = unknown | |
17393ac8 | 27 | > implements IWorkerChoiceStrategy { |
d33be430 | 28 | /** |
9b106837 | 29 | * The next worker node key. |
d33be430 | 30 | */ |
9b106837 | 31 | protected nextWorkerNodeKey: number = 0 |
d33be430 | 32 | |
6c6afb84 JB |
33 | /** @inheritDoc */ |
34 | public readonly strategyPolicy: StrategyPolicy = { | |
35 | useDynamicWorker: false | |
36 | } | |
37 | ||
afc003b2 | 38 | /** @inheritDoc */ |
87de9ff5 | 39 | public readonly taskStatisticsRequirements: TaskStatisticsRequirements = { |
3c93feb9 JB |
40 | runTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS, |
41 | waitTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS, | |
42 | elu: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS | |
10fcfaf4 | 43 | } |
bdaf31cd JB |
44 | |
45 | /** | |
6533c3e6 | 46 | * Constructs a worker choice strategy bound to the pool. |
bdaf31cd | 47 | * |
38e795c1 | 48 | * @param pool - The pool instance. |
da309861 | 49 | * @param opts - The worker choice strategy options. |
bdaf31cd JB |
50 | */ |
51 | public constructor ( | |
c4855468 | 52 | protected readonly pool: IPool<Worker, Data, Response>, |
a20f0ba5 | 53 | protected opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS |
b8f3418c | 54 | ) { |
7254e419 | 55 | this.choose = this.choose.bind(this) |
b8f3418c | 56 | } |
bdaf31cd | 57 | |
932fc8be JB |
58 | protected setTaskStatisticsRequirements ( |
59 | opts: WorkerChoiceStrategyOptions | |
60 | ): void { | |
57441b79 JB |
61 | this.toggleMedianMeasurementStatisticsRequirements( |
62 | this.taskStatisticsRequirements.runTime, | |
63 | opts.runTime?.median as boolean | |
64 | ) | |
65 | this.toggleMedianMeasurementStatisticsRequirements( | |
66 | this.taskStatisticsRequirements.waitTime, | |
67 | opts.waitTime?.median as boolean | |
68 | ) | |
69 | this.toggleMedianMeasurementStatisticsRequirements( | |
70 | this.taskStatisticsRequirements.elu, | |
71 | opts.elu?.median as boolean | |
72 | ) | |
73 | } | |
74 | ||
75 | private toggleMedianMeasurementStatisticsRequirements ( | |
76 | measurementStatisticsRequirements: MeasurementStatisticsRequirements, | |
77 | toggleMedian: boolean | |
78 | ): void { | |
79 | if (measurementStatisticsRequirements.average && toggleMedian) { | |
80 | measurementStatisticsRequirements.average = false | |
81 | measurementStatisticsRequirements.median = toggleMedian | |
5df69fab | 82 | } |
57441b79 JB |
83 | if (measurementStatisticsRequirements.median && !toggleMedian) { |
84 | measurementStatisticsRequirements.average = true | |
85 | measurementStatisticsRequirements.median = toggleMedian | |
5df69fab | 86 | } |
da309861 JB |
87 | } |
88 | ||
afc003b2 | 89 | /** @inheritDoc */ |
a6f7f1b4 | 90 | public abstract reset (): boolean |
ea7a90d3 | 91 | |
138d29a8 | 92 | /** @inheritDoc */ |
a4958de2 | 93 | public abstract update (workerNodeKey: number): boolean |
138d29a8 | 94 | |
afc003b2 | 95 | /** @inheritDoc */ |
c923ce56 | 96 | public abstract choose (): number |
97a2abc3 | 97 | |
afc003b2 | 98 | /** @inheritDoc */ |
f06e48d8 | 99 | public abstract remove (workerNodeKey: number): boolean |
a20f0ba5 JB |
100 | |
101 | /** @inheritDoc */ | |
102 | public setOptions (opts: WorkerChoiceStrategyOptions): void { | |
65ab8dcc JB |
103 | this.opts = opts ?? DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS |
104 | this.setTaskStatisticsRequirements(this.opts) | |
a20f0ba5 | 105 | } |
cb70b19d | 106 | |
d4ddb68b JB |
107 | /** |
108 | * Whether the worker node is ready or not. | |
109 | * | |
110 | * @param workerNodeKey - The worker node key. | |
111 | * @returns Whether the worker node is ready or not. | |
112 | */ | |
9b106837 | 113 | protected isWorkerNodeReady (workerNodeKey: number): boolean { |
19dbc45b JB |
114 | return this.pool.workerNodes[workerNodeKey].info.ready |
115 | } | |
116 | ||
f6b641d6 | 117 | /** |
e6606302 | 118 | * Gets the worker task runtime. |
932fc8be JB |
119 | * If the task statistics require the average runtime, the average runtime is returned. |
120 | * If the task statistics require the median runtime , the median runtime is returned. | |
f6b641d6 JB |
121 | * |
122 | * @param workerNodeKey - The worker node key. | |
e6606302 | 123 | * @returns The worker task runtime. |
f6b641d6 JB |
124 | */ |
125 | protected getWorkerTaskRunTime (workerNodeKey: number): number { | |
932fc8be | 126 | return this.taskStatisticsRequirements.runTime.median |
71514351 JB |
127 | ? this.pool.workerNodes[workerNodeKey].usage.runTime?.median ?? 0 |
128 | : this.pool.workerNodes[workerNodeKey].usage.runTime?.average ?? 0 | |
f6b641d6 JB |
129 | } |
130 | ||
ef680bb8 JB |
131 | /** |
132 | * Gets the worker task wait time. | |
932fc8be JB |
133 | * If the task statistics require the average wait time, the average wait time is returned. |
134 | * If the task statistics require the median wait time, the median wait time is returned. | |
ef680bb8 JB |
135 | * |
136 | * @param workerNodeKey - The worker node key. | |
137 | * @returns The worker task wait time. | |
138 | */ | |
5df69fab | 139 | protected getWorkerTaskWaitTime (workerNodeKey: number): number { |
932fc8be | 140 | return this.taskStatisticsRequirements.waitTime.median |
71514351 JB |
141 | ? this.pool.workerNodes[workerNodeKey].usage.waitTime?.median ?? 0 |
142 | : this.pool.workerNodes[workerNodeKey].usage.waitTime?.average ?? 0 | |
ef680bb8 JB |
143 | } |
144 | ||
5df69fab JB |
145 | /** |
146 | * Gets the worker task ELU. | |
9adcefab JB |
147 | * If the task statistics require the average ELU, the average ELU is returned. |
148 | * If the task statistics require the median ELU, the median ELU is returned. | |
5df69fab JB |
149 | * |
150 | * @param workerNodeKey - The worker node key. | |
151 | * @returns The worker task ELU. | |
152 | */ | |
153 | protected getWorkerTaskElu (workerNodeKey: number): number { | |
154 | return this.taskStatisticsRequirements.elu.median | |
71514351 JB |
155 | ? this.pool.workerNodes[workerNodeKey].usage.elu.active?.median ?? 0 |
156 | : this.pool.workerNodes[workerNodeKey].usage.elu.active?.average ?? 0 | |
5df69fab JB |
157 | } |
158 | ||
0bbf65c3 JB |
159 | protected computeDefaultWorkerWeight (): number { |
160 | let cpusCycleTimeWeight = 0 | |
161 | for (const cpu of cpus()) { | |
162 | // CPU estimated cycle time | |
163 | const numberOfDigits = cpu.speed.toString().length - 1 | |
164 | const cpuCycleTime = 1 / (cpu.speed / Math.pow(10, numberOfDigits)) | |
165 | cpusCycleTimeWeight += cpuCycleTime * Math.pow(10, numberOfDigits) | |
166 | } | |
167 | return Math.round(cpusCycleTimeWeight / cpus().length) | |
168 | } | |
bdaf31cd | 169 | } |