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feec6e8c JB |
1 | import type { IWorker } from '../worker' |
2 | import type { IPool } from '../pool' | |
619f403b JB |
3 | import { |
4 | DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS, | |
5 | DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS | |
6 | } from '../../utils' | |
feec6e8c JB |
7 | import { AbstractWorkerChoiceStrategy } from './abstract-worker-choice-strategy' |
8 | import type { | |
9 | IWorkerChoiceStrategy, | |
619f403b | 10 | TaskStatisticsRequirements, |
feec6e8c JB |
11 | WorkerChoiceStrategyOptions |
12 | } from './selection-strategies-types' | |
13 | ||
14 | /** | |
15 | * Selects the next worker with an interleaved weighted round robin scheduling algorithm. | |
16 | * | |
17 | * @typeParam Worker - Type of worker which manages the strategy. | |
e102732c JB |
18 | * @typeParam Data - Type of data sent to the worker. This can only be structured-cloneable data. |
19 | * @typeParam Response - Type of execution response. This can only be structured-cloneable data. | |
feec6e8c JB |
20 | */ |
21 | export class InterleavedWeightedRoundRobinWorkerChoiceStrategy< | |
22 | Worker extends IWorker, | |
23 | Data = unknown, | |
24 | Response = unknown | |
25 | > | |
26 | extends AbstractWorkerChoiceStrategy<Worker, Data, Response> | |
27 | implements IWorkerChoiceStrategy { | |
619f403b JB |
28 | /** @inheritDoc */ |
29 | public readonly taskStatisticsRequirements: TaskStatisticsRequirements = { | |
30 | runTime: { | |
31 | aggregate: true, | |
32 | average: true, | |
33 | median: false | |
34 | }, | |
35 | waitTime: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS, | |
36 | elu: DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS | |
37 | } | |
38 | ||
feec6e8c | 39 | /** |
d33be430 | 40 | * Round id. |
feec6e8c | 41 | */ |
d33be430 | 42 | private roundId: number = 0 |
619f403b JB |
43 | /** |
44 | * Default worker weight. | |
45 | */ | |
46 | private readonly defaultWorkerWeight: number | |
feec6e8c JB |
47 | /** |
48 | * Round weights. | |
49 | */ | |
e4854a4e | 50 | private roundWeights: number[] |
feec6e8c | 51 | /** |
619f403b | 52 | * Worker node id. |
feec6e8c | 53 | */ |
619f403b JB |
54 | private workerNodeId: number = 0 |
55 | /** | |
56 | * Worker virtual task runtime. | |
57 | */ | |
58 | private workerVirtualTaskRunTime: number = 0 | |
feec6e8c JB |
59 | |
60 | /** @inheritDoc */ | |
61 | public constructor ( | |
62 | pool: IPool<Worker, Data, Response>, | |
63 | opts: WorkerChoiceStrategyOptions = DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS | |
64 | ) { | |
65 | super(pool, opts) | |
932fc8be | 66 | this.setTaskStatisticsRequirements(this.opts) |
feec6e8c JB |
67 | this.defaultWorkerWeight = this.computeDefaultWorkerWeight() |
68 | this.roundWeights = this.getRoundWeights() | |
69 | } | |
70 | ||
71 | /** @inheritDoc */ | |
72 | public reset (): boolean { | |
39a43af7 | 73 | this.resetWorkerNodeKeyProperties() |
d33be430 | 74 | this.roundId = 0 |
619f403b JB |
75 | this.workerNodeId = 0 |
76 | this.workerVirtualTaskRunTime = 0 | |
feec6e8c JB |
77 | return true |
78 | } | |
79 | ||
80 | /** @inheritDoc */ | |
81 | public update (): boolean { | |
82 | return true | |
83 | } | |
84 | ||
85 | /** @inheritDoc */ | |
b1aae695 | 86 | public choose (): number | undefined { |
297f3bbe | 87 | for ( |
d33be430 | 88 | let roundIndex = this.roundId; |
d3127e84 JB |
89 | roundIndex < this.roundWeights.length; |
90 | roundIndex++ | |
297f3bbe | 91 | ) { |
619f403b | 92 | this.roundId = roundIndex |
feec6e8c | 93 | for ( |
619f403b | 94 | let workerNodeKey = this.workerNodeId; |
297f3bbe JB |
95 | workerNodeKey < this.pool.workerNodes.length; |
96 | workerNodeKey++ | |
feec6e8c | 97 | ) { |
619f403b | 98 | this.workerNodeId = workerNodeKey |
619f403b JB |
99 | if ( |
100 | this.workerNodeId !== this.nextWorkerNodeKey && | |
101 | this.workerVirtualTaskRunTime !== 0 | |
102 | ) { | |
103 | this.workerVirtualTaskRunTime = 0 | |
104 | } | |
297f3bbe JB |
105 | const workerWeight = |
106 | this.opts.weights?.[workerNodeKey] ?? this.defaultWorkerWeight | |
619f403b JB |
107 | if ( |
108 | workerWeight >= this.roundWeights[roundIndex] && | |
109 | this.workerVirtualTaskRunTime < workerWeight | |
110 | ) { | |
111 | this.workerVirtualTaskRunTime = | |
112 | this.workerVirtualTaskRunTime + | |
113 | this.getWorkerTaskRunTime(workerNodeKey) | |
baca80f7 | 114 | this.setPreviousWorkerNodeKey(this.nextWorkerNodeKey) |
619f403b JB |
115 | this.nextWorkerNodeKey = workerNodeKey |
116 | return this.nextWorkerNodeKey | |
feec6e8c JB |
117 | } |
118 | } | |
297f3bbe | 119 | } |
619f403b JB |
120 | this.interleavedWeightedRoundRobinNextWorkerNodeId() |
121 | } | |
122 | ||
123 | private interleavedWeightedRoundRobinNextWorkerNodeId (): void { | |
124 | if ( | |
125 | this.roundId === this.roundWeights.length - 1 && | |
126 | this.workerNodeId === this.pool.workerNodes.length - 1 | |
127 | ) { | |
128 | this.roundId = 0 | |
129 | this.workerNodeId = 0 | |
130 | } else if (this.workerNodeId === this.pool.workerNodes.length - 1) { | |
131 | this.roundId = this.roundId + 1 | |
132 | this.workerNodeId = 0 | |
297f3bbe | 133 | } else { |
619f403b | 134 | this.workerNodeId = this.workerNodeId + 1 |
feec6e8c | 135 | } |
feec6e8c JB |
136 | } |
137 | ||
138 | /** @inheritDoc */ | |
139 | public remove (workerNodeKey: number): boolean { | |
226b02a3 JB |
140 | if (this.pool.workerNodes.length === 0) { |
141 | this.reset() | |
142 | } | |
143 | if ( | |
144 | this.workerNodeId === workerNodeKey && | |
145 | this.workerNodeId > this.pool.workerNodes.length - 1 | |
146 | ) { | |
147 | this.workerNodeId = this.pool.workerNodes.length - 1 | |
148 | } | |
149 | if ( | |
150 | this.previousWorkerNodeKey === workerNodeKey && | |
151 | this.previousWorkerNodeKey > this.pool.workerNodes.length - 1 | |
152 | ) { | |
153 | this.previousWorkerNodeKey = this.pool.workerNodes.length - 1 | |
feec6e8c JB |
154 | } |
155 | return true | |
156 | } | |
157 | ||
e4854a4e JB |
158 | /** @inheritDoc */ |
159 | public setOptions (opts: WorkerChoiceStrategyOptions): void { | |
160 | super.setOptions(opts) | |
161 | this.roundWeights = this.getRoundWeights() | |
162 | } | |
163 | ||
feec6e8c JB |
164 | private getRoundWeights (): number[] { |
165 | if (this.opts.weights == null) { | |
166 | return [this.defaultWorkerWeight] | |
167 | } | |
168 | return [ | |
169 | ...new Set( | |
170 | Object.values(this.opts.weights) | |
171 | .slice() | |
172 | .sort((a, b) => a - b) | |
173 | ) | |
174 | ] | |
175 | } | |
176 | } |