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| 1 | +// |
| 2 | +// Copyright (c) 2025 Contributors to the Eclipse Foundation |
| 3 | +// |
| 4 | +// See the NOTICE file(s) distributed with this work for additional |
| 5 | +// information regarding copyright ownership. |
| 6 | +// |
| 7 | +// This program and the accompanying materials are made available under the |
| 8 | +// terms of the Apache License Version 2.0 which is available at |
| 9 | +// <https://www.apache.org/licenses/LICENSE-2.0> |
| 10 | +// |
| 11 | +// SPDX-License-Identifier: Apache-2.0 |
| 12 | +// |
| 13 | +use kyron::core::types::UniqueWorkerId; |
| 14 | +use kyron::prelude::ThreadParameters as AsyncRtThreadParameters; |
| 15 | +use kyron::runtime::*; |
| 16 | +use kyron::scheduler::SchedulerType; |
| 17 | +use serde::{de, Deserialize, Deserializer}; |
| 18 | +use serde_json::Value; |
| 19 | +use tracing::debug; |
| 20 | + |
| 21 | +fn deserialize_scheduler_type<'de, D>(deserializer: D) -> Result<Option<SchedulerType>, D::Error> |
| 22 | +where |
| 23 | + D: Deserializer<'de>, |
| 24 | +{ |
| 25 | + let value_opt: Option<String> = Option::deserialize(deserializer)?; |
| 26 | + if let Some(value_str) = value_opt { |
| 27 | + let value = match value_str.as_str() { |
| 28 | + "fifo" => SchedulerType::Fifo, |
| 29 | + "round_robin" => SchedulerType::RoundRobin, |
| 30 | + "other" => SchedulerType::Other, |
| 31 | + _ => return Err(de::Error::custom("Unknown scheduler type")), |
| 32 | + }; |
| 33 | + return Ok(Some(value)); |
| 34 | + } |
| 35 | + |
| 36 | + Ok(None) |
| 37 | +} |
| 38 | + |
| 39 | +/// Thread parameters. |
| 40 | +#[derive(Deserialize, Debug, Clone)] |
| 41 | +pub struct ThreadParameters { |
| 42 | + pub thread_priority: Option<u8>, |
| 43 | + pub thread_affinity: Option<Vec<usize>>, |
| 44 | + pub thread_stack_size: Option<u64>, |
| 45 | + #[serde(default, deserialize_with = "deserialize_scheduler_type")] |
| 46 | + pub thread_scheduler: Option<SchedulerType>, |
| 47 | +} |
| 48 | + |
| 49 | +/// Dedicated worker configuration. |
| 50 | +#[derive(Deserialize, Debug, Clone)] |
| 51 | +pub struct DedicatedWorkerConfig { |
| 52 | + pub id: String, |
| 53 | + #[serde(flatten)] |
| 54 | + pub thread_parameters: ThreadParameters, |
| 55 | +} |
| 56 | + |
| 57 | +/// Execution engine configuration. |
| 58 | +#[derive(Deserialize, Debug, Clone)] |
| 59 | +pub struct ExecEngineConfig { |
| 60 | + pub task_queue_size: u32, |
| 61 | + pub workers: usize, |
| 62 | + #[serde(flatten)] |
| 63 | + pub thread_parameters: ThreadParameters, |
| 64 | + pub dedicated_workers: Option<Vec<DedicatedWorkerConfig>>, |
| 65 | +} |
| 66 | + |
| 67 | +fn deserialize_exec_engines<'de, D>(deserializer: D) -> Result<Vec<ExecEngineConfig>, D::Error> |
| 68 | +where |
| 69 | + D: Deserializer<'de>, |
| 70 | +{ |
| 71 | + #[derive(Deserialize)] |
| 72 | + #[serde(untagged)] |
| 73 | + enum RuntimeConfig { |
| 74 | + Object(ExecEngineConfig), |
| 75 | + Array(Vec<ExecEngineConfig>), |
| 76 | + } |
| 77 | + |
| 78 | + let exec_engines = match RuntimeConfig::deserialize(deserializer)? { |
| 79 | + RuntimeConfig::Object(exec_engine_config) => vec![exec_engine_config], |
| 80 | + RuntimeConfig::Array(exec_engine_configs) => exec_engine_configs, |
| 81 | + }; |
| 82 | + Ok(exec_engines) |
| 83 | +} |
| 84 | + |
| 85 | +#[derive(Deserialize, Debug)] |
| 86 | +#[serde(transparent)] |
| 87 | +pub struct Runtime { |
| 88 | + #[serde(deserialize_with = "deserialize_exec_engines")] |
| 89 | + exec_engines: Vec<ExecEngineConfig>, |
| 90 | +} |
| 91 | + |
| 92 | +impl Runtime { |
| 93 | + /// Parse `Runtime` from JSON string. |
| 94 | + /// JSON is expected to contain `runtime` field. |
| 95 | + pub fn from_json(json_str: &str) -> Result<Self, String> { |
| 96 | + let v: Value = serde_json::from_str(json_str).map_err(|e| e.to_string())?; |
| 97 | + serde_json::from_value(v["runtime"].clone()).map_err(|e| e.to_string()) |
| 98 | + } |
| 99 | + |
| 100 | + pub fn exec_engines(&self) -> &Vec<ExecEngineConfig> { |
| 101 | + &self.exec_engines |
| 102 | + } |
| 103 | + |
| 104 | + pub fn build(&self) -> kyron::runtime::Runtime { |
| 105 | + debug!("Creating kyron::Runtime with {} execution engines", self.exec_engines.len()); |
| 106 | + |
| 107 | + let mut async_rt_builder = kyron::runtime::RuntimeBuilder::new(); |
| 108 | + for exec_engine in self.exec_engines.as_slice() { |
| 109 | + debug!("Creating ExecutionEngine with: {:?}", exec_engine); |
| 110 | + |
| 111 | + let mut exec_engine_builder = ExecutionEngineBuilder::new() |
| 112 | + .task_queue_size(exec_engine.task_queue_size) |
| 113 | + .workers(exec_engine.workers); |
| 114 | + |
| 115 | + // Set thread parameters. |
| 116 | + { |
| 117 | + let thread_params = &exec_engine.thread_parameters; |
| 118 | + if let Some(thread_priority) = thread_params.thread_priority { |
| 119 | + exec_engine_builder = exec_engine_builder.thread_priority(thread_priority); |
| 120 | + } |
| 121 | + if let Some(thread_affinity) = &thread_params.thread_affinity { |
| 122 | + exec_engine_builder = exec_engine_builder.thread_affinity(thread_affinity); |
| 123 | + } |
| 124 | + if let Some(thread_stack_size) = thread_params.thread_stack_size { |
| 125 | + exec_engine_builder = exec_engine_builder.thread_stack_size(thread_stack_size); |
| 126 | + } |
| 127 | + if let Some(thread_scheduler) = thread_params.thread_scheduler { |
| 128 | + exec_engine_builder = exec_engine_builder.thread_scheduler(thread_scheduler); |
| 129 | + } |
| 130 | + } |
| 131 | + |
| 132 | + // Set dedicated workers. |
| 133 | + if let Some(dedicated_workers) = &exec_engine.dedicated_workers { |
| 134 | + for dedicated_worker in dedicated_workers { |
| 135 | + // Create thread parameters object. |
| 136 | + let mut async_rt_thread_params = AsyncRtThreadParameters::default(); |
| 137 | + if let Some(thread_priority) = dedicated_worker.thread_parameters.thread_priority { |
| 138 | + async_rt_thread_params = async_rt_thread_params.priority(thread_priority); |
| 139 | + } |
| 140 | + if let Some(thread_affinity) = &dedicated_worker.thread_parameters.thread_affinity { |
| 141 | + async_rt_thread_params = async_rt_thread_params.affinity(thread_affinity); |
| 142 | + } |
| 143 | + if let Some(thread_stack_size) = dedicated_worker.thread_parameters.thread_stack_size { |
| 144 | + async_rt_thread_params = async_rt_thread_params.stack_size(thread_stack_size); |
| 145 | + } |
| 146 | + if let Some(thread_scheduler) = dedicated_worker.thread_parameters.thread_scheduler { |
| 147 | + async_rt_thread_params = async_rt_thread_params.scheduler_type(thread_scheduler); |
| 148 | + } |
| 149 | + |
| 150 | + // Create `UniqueWorkerId`. |
| 151 | + let unique_worker_id = UniqueWorkerId::from(&dedicated_worker.id); |
| 152 | + |
| 153 | + exec_engine_builder = exec_engine_builder.with_dedicated_worker(unique_worker_id, async_rt_thread_params); |
| 154 | + } |
| 155 | + } |
| 156 | + |
| 157 | + let (builder, _) = async_rt_builder.with_engine(exec_engine_builder); |
| 158 | + async_rt_builder = builder; |
| 159 | + } |
| 160 | + |
| 161 | + async_rt_builder.build().expect("Failed to build async runtime") |
| 162 | + } |
| 163 | +} |
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