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bdaf31cd JB |
1 | /** |
2 | * Enumeration of worker choice strategies. | |
3 | */ | |
4 | export const WorkerChoiceStrategies = Object.freeze({ | |
5 | /** | |
6 | * Round robin worker selection strategy. | |
7 | */ | |
8 | ROUND_ROBIN: 'ROUND_ROBIN', | |
9 | /** | |
e4543b14 | 10 | * Least used worker selection strategy. |
bdaf31cd | 11 | */ |
e4543b14 | 12 | LEAST_USED: 'LEAST_USED', |
168c526f | 13 | /** |
e4543b14 | 14 | * Least busy worker selection strategy. |
168c526f | 15 | */ |
e4543b14 | 16 | LEAST_BUSY: 'LEAST_BUSY', |
058a9457 JB |
17 | /** |
18 | * Least ELU worker selection strategy. | |
19 | * | |
20 | * @experimental | |
21 | */ | |
22 | LEAST_ELU: 'LEAST_ELU', | |
23ff945a JB |
23 | /** |
24 | * Fair share worker selection strategy. | |
25 | */ | |
26 | FAIR_SHARE: 'FAIR_SHARE', | |
b3432a63 JB |
27 | /** |
28 | * Weighted round robin worker selection strategy. | |
29 | */ | |
feec6e8c JB |
30 | WEIGHTED_ROUND_ROBIN: 'WEIGHTED_ROUND_ROBIN', |
31 | /** | |
32 | * Interleaved weighted round robin worker selection strategy. | |
d3127e84 JB |
33 | * |
34 | * @experimental | |
feec6e8c JB |
35 | */ |
36 | INTERLEAVED_WEIGHTED_ROUND_ROBIN: 'INTERLEAVED_WEIGHTED_ROUND_ROBIN' | |
bdaf31cd JB |
37 | } as const) |
38 | ||
39 | /** | |
40 | * Worker choice strategy. | |
41 | */ | |
42 | export type WorkerChoiceStrategy = keyof typeof WorkerChoiceStrategies | |
43 | ||
ff733df7 JB |
44 | /** |
45 | * Worker choice strategy options. | |
46 | */ | |
47 | export interface WorkerChoiceStrategyOptions { | |
b0623665 | 48 | /** |
9e45c2c4 | 49 | * Use tasks median runtime instead of average runtime. |
d29bce7c JB |
50 | * |
51 | * @defaultValue false | |
b0623665 | 52 | */ |
ff733df7 | 53 | medRunTime?: boolean |
0567595a | 54 | /** |
e6606302 | 55 | * Use tasks median wait time instead of average runtime. |
0567595a JB |
56 | * |
57 | * @defaultValue false | |
58 | */ | |
59 | medWaitTime?: boolean | |
08f3f44c JB |
60 | /** |
61 | * Worker weights to use for weighted round robin worker selection strategy. | |
62 | * Weight is the tasks maximum average or median runtime in milliseconds. | |
63 | * | |
64 | * @defaultValue Computed worker weights automatically given the CPU performance. | |
65 | */ | |
66 | weights?: Record<number, number> | |
ff733df7 JB |
67 | } |
68 | ||
10fcfaf4 | 69 | /** |
9cd39dd4 | 70 | * Pool worker tasks usage statistics requirements. |
71ebe93b JB |
71 | * |
72 | * @internal | |
10fcfaf4 | 73 | */ |
b6b32453 | 74 | export interface TaskStatistics { |
243a550a | 75 | /** |
9e775f96 | 76 | * Require tasks runtime. |
243a550a | 77 | */ |
10fcfaf4 | 78 | runTime: boolean |
243a550a | 79 | /** |
9e775f96 | 80 | * Require tasks average runtime. |
243a550a | 81 | */ |
c6bd2650 | 82 | avgRunTime: boolean |
243a550a | 83 | /** |
9e775f96 | 84 | * Require tasks median runtime. |
243a550a | 85 | */ |
78099a15 | 86 | medRunTime: boolean |
0567595a JB |
87 | /** |
88 | * Require tasks wait time. | |
89 | */ | |
90 | waitTime: boolean | |
91 | /** | |
92 | * Require tasks average wait time. | |
93 | */ | |
94 | avgWaitTime: boolean | |
95 | /** | |
96 | * Require tasks median wait time. | |
97 | */ | |
98 | medWaitTime: boolean | |
62c15a68 JB |
99 | /** |
100 | * Event loop utilization. | |
101 | */ | |
102 | elu: boolean | |
10fcfaf4 JB |
103 | } |
104 | ||
bdaf31cd JB |
105 | /** |
106 | * Worker choice strategy interface. | |
bdaf31cd | 107 | */ |
17393ac8 | 108 | export interface IWorkerChoiceStrategy { |
10fcfaf4 | 109 | /** |
b6b32453 | 110 | * Required tasks statistics. |
10fcfaf4 | 111 | */ |
b6b32453 | 112 | readonly taskStatistics: TaskStatistics |
ea7a90d3 | 113 | /** |
138d29a8 | 114 | * Resets strategy internals. |
a4958de2 JB |
115 | * |
116 | * @returns `true` if the reset is successful, `false` otherwise. | |
ea7a90d3 | 117 | */ |
78cea37e | 118 | reset: () => boolean |
138d29a8 | 119 | /** |
c7e196ba | 120 | * Updates the worker node key strategy internals. |
138d29a8 JB |
121 | * |
122 | * @returns `true` if the update is successful, `false` otherwise. | |
123 | */ | |
a4958de2 | 124 | update: (workerNodeKey: number) => boolean |
bdaf31cd | 125 | /** |
f06e48d8 | 126 | * Chooses a worker node in the pool and returns its key. |
a4958de2 JB |
127 | * |
128 | * @returns The worker node key. | |
bdaf31cd | 129 | */ |
c923ce56 | 130 | choose: () => number |
97a2abc3 | 131 | /** |
c7e196ba | 132 | * Removes the worker node key from strategy internals. |
97a2abc3 | 133 | * |
f06e48d8 | 134 | * @param workerNodeKey - The worker node key. |
138d29a8 | 135 | * @returns `true` if the worker node key is removed, `false` otherwise. |
97a2abc3 | 136 | */ |
f06e48d8 | 137 | remove: (workerNodeKey: number) => boolean |
a20f0ba5 JB |
138 | /** |
139 | * Sets the worker choice strategy options. | |
140 | * | |
141 | * @param opts - The worker choice strategy options. | |
142 | */ | |
143 | setOptions: (opts: WorkerChoiceStrategyOptions) => void | |
bdaf31cd | 144 | } |