| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/git/checkouts/tokio-377c595163f99a10/dfe252d/tokio/src/runtime/scheduler/multi_thread/worker.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>worker.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../../../normalize.css"><link rel="stylesheet" href="../../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../../../ayu.css" disabled><link rel="stylesheet" href="../../../../../dark.css" disabled><link rel="stylesheet" href="../../../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../../../storage.js"></script><script defer src="../../../../../source-script.js"></script><script defer src="../../../../../source-files.js"></script><script defer src="../../../../../main.js"></script><noscript><link rel="stylesheet" href="../../../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../../../tokio/index.html"><div class="logo-container"><img class="rust-logo" src="../../../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../../../tokio/index.html"><img class="rust-logo" src="../../../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| <span id="901">901</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! A scheduler is initialized with a fixed number of workers. Each worker is |
| //! driven by a thread. Each worker has a "core" which contains data such as the |
| //! run queue and other state. When `block_in_place` is called, the worker's |
| //! "core" is handed off to a new thread allowing the scheduler to continue to |
| //! make progress while the originating thread blocks. |
| //! |
| //! # Shutdown |
| //! |
| //! Shutting down the runtime involves the following steps: |
| //! |
| //! 1. The Shared::close method is called. This closes the inject queue and |
| //! OwnedTasks instance and wakes up all worker threads. |
| //! |
| //! 2. Each worker thread observes the close signal next time it runs |
| //! Core::maintenance by checking whether the inject queue is closed. |
| //! The Core::is_shutdown flag is set to true. |
| //! |
| //! 3. The worker thread calls `pre_shutdown` in parallel. Here, the worker |
| //! will keep removing tasks from OwnedTasks until it is empty. No new |
| //! tasks can be pushed to the OwnedTasks during or after this step as it |
| //! was closed in step 1. |
| //! |
| //! 5. The workers call Shared::shutdown to enter the single-threaded phase of |
| //! shutdown. These calls will push their core to Shared::shutdown_cores, |
| //! and the last thread to push its core will finish the shutdown procedure. |
| //! |
| //! 6. The local run queue of each core is emptied, then the inject queue is |
| //! emptied. |
| //! |
| //! At this point, shutdown has completed. It is not possible for any of the |
| //! collections to contain any tasks at this point, as each collection was |
| //! closed first, then emptied afterwards. |
| //! |
| //! ## Spawns during shutdown |
| //! |
| //! When spawning tasks during shutdown, there are two cases: |
| //! |
| //! * The spawner observes the OwnedTasks being open, and the inject queue is |
| //! closed. |
| //! * The spawner observes the OwnedTasks being closed and doesn't check the |
| //! inject queue. |
| //! |
| //! The first case can only happen if the OwnedTasks::bind call happens before |
| //! or during step 1 of shutdown. In this case, the runtime will clean up the |
| //! task in step 3 of shutdown. |
| //! |
| //! In the latter case, the task was not spawned and the task is immediately |
| //! cancelled by the spawner. |
| //! |
| //! The correctness of shutdown requires both the inject queue and OwnedTasks |
| //! collection to have a closed bit. With a close bit on only the inject queue, |
| //! spawning could run in to a situation where a task is successfully bound long |
| //! after the runtime has shut down. With a close bit on only the OwnedTasks, |
| //! the first spawning situation could result in the notification being pushed |
| //! to the inject queue after step 6 of shutdown, which would leave a task in |
| //! the inject queue indefinitely. This would be a ref-count cycle and a memory |
| //! leak. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::loom::sync::{Arc, Mutex}; |
| <span class="kw">use </span><span class="kw">crate</span>::runtime; |
| <span class="kw">use </span><span class="kw">crate</span>::runtime::context; |
| <span class="kw">use </span><span class="kw">crate</span>::runtime::scheduler::multi_thread::{queue, Handle, Idle, Parker, Unparker}; |
| <span class="kw">use </span><span class="kw">crate</span>::runtime::task::{Inject, OwnedTasks}; |
| <span class="kw">use </span><span class="kw">crate</span>::runtime::{ |
| blocking, coop, driver, scheduler, task, Config, MetricsBatch, SchedulerMetrics, WorkerMetrics, |
| }; |
| <span class="kw">use </span><span class="kw">crate</span>::util::atomic_cell::AtomicCell; |
| <span class="kw">use </span><span class="kw">crate</span>::util::rand::{FastRand, RngSeedGenerator}; |
| |
| <span class="kw">use </span>std::cell::RefCell; |
| <span class="kw">use </span>std::time::Duration; |
| |
| <span class="doccomment">/// A scheduler worker |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>Worker { |
| <span class="doccomment">/// Reference to scheduler's handle |
| </span>handle: Arc<Handle>, |
| |
| <span class="doccomment">/// Index holding this worker's remote state |
| </span>index: usize, |
| |
| <span class="doccomment">/// Used to hand-off a worker's core to another thread. |
| </span>core: AtomicCell<Core>, |
| } |
| |
| <span class="doccomment">/// Core data |
| </span><span class="kw">struct </span>Core { |
| <span class="doccomment">/// Used to schedule bookkeeping tasks every so often. |
| </span>tick: u32, |
| |
| <span class="doccomment">/// When a task is scheduled from a worker, it is stored in this slot. The |
| /// worker will check this slot for a task **before** checking the run |
| /// queue. This effectively results in the **last** scheduled task to be run |
| /// next (LIFO). This is an optimization for message passing patterns and |
| /// helps to reduce latency. |
| </span>lifo_slot: <span class="prelude-ty">Option</span><Notified>, |
| |
| <span class="doccomment">/// The worker-local run queue. |
| </span>run_queue: queue::Local<Arc<Handle>>, |
| |
| <span class="doccomment">/// True if the worker is currently searching for more work. Searching |
| /// involves attempting to steal from other workers. |
| </span>is_searching: bool, |
| |
| <span class="doccomment">/// True if the scheduler is being shutdown |
| </span>is_shutdown: bool, |
| |
| <span class="doccomment">/// Parker |
| /// |
| /// Stored in an `Option` as the parker is added / removed to make the |
| /// borrow checker happy. |
| </span>park: <span class="prelude-ty">Option</span><Parker>, |
| |
| <span class="doccomment">/// Batching metrics so they can be submitted to RuntimeMetrics. |
| </span>metrics: MetricsBatch, |
| |
| <span class="doccomment">/// Fast random number generator. |
| </span>rand: FastRand, |
| } |
| |
| <span class="doccomment">/// State shared across all workers |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">struct </span>Shared { |
| <span class="doccomment">/// Per-worker remote state. All other workers have access to this and is |
| /// how they communicate between each other. |
| </span>remotes: Box<[Remote]>, |
| |
| <span class="doccomment">/// Global task queue used for: |
| /// 1. Submit work to the scheduler while **not** currently on a worker thread. |
| /// 2. Submit work to the scheduler when a worker run queue is saturated |
| </span>inject: Inject<Arc<Handle>>, |
| |
| <span class="doccomment">/// Coordinates idle workers |
| </span>idle: Idle, |
| |
| <span class="doccomment">/// Collection of all active tasks spawned onto this executor. |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) owned: OwnedTasks<Arc<Handle>>, |
| |
| <span class="doccomment">/// Cores that have observed the shutdown signal |
| /// |
| /// The core is **not** placed back in the worker to avoid it from being |
| /// stolen by a thread that was spawned as part of `block_in_place`. |
| </span><span class="attribute">#[allow(clippy::vec_box)] </span><span class="comment">// we're moving an already-boxed value |
| </span>shutdown_cores: Mutex<Vec<Box<Core>>>, |
| |
| <span class="doccomment">/// Scheduler configuration options |
| </span>config: Config, |
| |
| <span class="doccomment">/// Collects metrics from the runtime. |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) scheduler_metrics: SchedulerMetrics, |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) worker_metrics: Box<[WorkerMetrics]>, |
| } |
| |
| <span class="doccomment">/// Used to communicate with a worker from other threads. |
| </span><span class="kw">struct </span>Remote { |
| <span class="doccomment">/// Steals tasks from this worker. |
| </span>steal: queue::Steal<Arc<Handle>>, |
| |
| <span class="doccomment">/// Unparks the associated worker thread |
| </span>unpark: Unparker, |
| } |
| |
| <span class="doccomment">/// Thread-local context |
| </span><span class="kw">struct </span>Context { |
| <span class="doccomment">/// Worker |
| </span>worker: Arc<Worker>, |
| |
| <span class="doccomment">/// Core data |
| </span>core: RefCell<<span class="prelude-ty">Option</span><Box<Core>>>, |
| } |
| |
| <span class="doccomment">/// Starts the workers |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>Launch(Vec<Arc<Worker>>); |
| |
| <span class="doccomment">/// Running a task may consume the core. If the core is still available when |
| /// running the task completes, it is returned. Otherwise, the worker will need |
| /// to stop processing. |
| </span><span class="kw">type </span>RunResult = <span class="prelude-ty">Result</span><Box<Core>, ()>; |
| |
| <span class="doccomment">/// A task handle |
| </span><span class="kw">type </span>Task = task::Task<Arc<Handle>>; |
| |
| <span class="doccomment">/// A notified task handle |
| </span><span class="kw">type </span>Notified = task::Notified<Arc<Handle>>; |
| |
| <span class="comment">// Tracks thread-local state |
| </span><span class="macro">scoped_thread_local!</span>(<span class="kw">static </span>CURRENT: Context); |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>create( |
| size: usize, |
| park: Parker, |
| driver_handle: driver::Handle, |
| blocking_spawner: blocking::Spawner, |
| seed_generator: RngSeedGenerator, |
| config: Config, |
| ) -> (Arc<Handle>, Launch) { |
| <span class="kw">let </span><span class="kw-2">mut </span>cores = Vec::with_capacity(size); |
| <span class="kw">let </span><span class="kw-2">mut </span>remotes = Vec::with_capacity(size); |
| <span class="kw">let </span><span class="kw-2">mut </span>worker_metrics = Vec::with_capacity(size); |
| |
| <span class="comment">// Create the local queues |
| </span><span class="kw">for _ in </span><span class="number">0</span>..size { |
| <span class="kw">let </span>(steal, run_queue) = queue::local(); |
| |
| <span class="kw">let </span>park = park.clone(); |
| <span class="kw">let </span>unpark = park.unpark(); |
| |
| cores.push(Box::new(Core { |
| tick: <span class="number">0</span>, |
| lifo_slot: <span class="prelude-val">None</span>, |
| run_queue, |
| is_searching: <span class="bool-val">false</span>, |
| is_shutdown: <span class="bool-val">false</span>, |
| park: <span class="prelude-val">Some</span>(park), |
| metrics: MetricsBatch::new(), |
| rand: FastRand::new(config.seed_generator.next_seed()), |
| })); |
| |
| remotes.push(Remote { steal, unpark }); |
| worker_metrics.push(WorkerMetrics::new()); |
| } |
| |
| <span class="kw">let </span>handle = Arc::new(Handle { |
| shared: Shared { |
| remotes: remotes.into_boxed_slice(), |
| inject: Inject::new(), |
| idle: Idle::new(size), |
| owned: OwnedTasks::new(), |
| shutdown_cores: Mutex::new(<span class="macro">vec!</span>[]), |
| config, |
| scheduler_metrics: SchedulerMetrics::new(), |
| worker_metrics: worker_metrics.into_boxed_slice(), |
| }, |
| driver: driver_handle, |
| blocking_spawner, |
| seed_generator, |
| }); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>launch = Launch(<span class="macro">vec!</span>[]); |
| |
| <span class="kw">for </span>(index, core) <span class="kw">in </span>cores.drain(..).enumerate() { |
| launch.<span class="number">0</span>.push(Arc::new(Worker { |
| handle: handle.clone(), |
| index, |
| core: AtomicCell::new(<span class="prelude-val">Some</span>(core)), |
| })); |
| } |
| |
| (handle, launch) |
| } |
| |
| <span class="attribute">#[track_caller] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>block_in_place<F, R>(f: F) -> R |
| <span class="kw">where |
| </span>F: FnOnce() -> R, |
| { |
| <span class="comment">// Try to steal the worker core back |
| </span><span class="kw">struct </span>Reset(coop::Budget); |
| |
| <span class="kw">impl </span>Drop <span class="kw">for </span>Reset { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| CURRENT.with(|maybe_cx| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(cx) = maybe_cx { |
| <span class="kw">let </span>core = cx.worker.core.take(); |
| <span class="kw">let </span><span class="kw-2">mut </span>cx_core = cx.core.borrow_mut(); |
| <span class="macro">assert!</span>(cx_core.is_none()); |
| <span class="kw-2">*</span>cx_core = core; |
| |
| <span class="comment">// Reset the task budget as we are re-entering the |
| // runtime. |
| </span>coop::set(<span class="self">self</span>.<span class="number">0</span>); |
| } |
| }); |
| } |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>had_entered = <span class="bool-val">false</span>; |
| |
| <span class="kw">let </span>setup_result = CURRENT.with(|maybe_cx| { |
| <span class="kw">match </span>( |
| <span class="kw">crate</span>::runtime::context::current_enter_context(), |
| maybe_cx.is_some(), |
| ) { |
| (context::EnterRuntime::Entered { .. }, <span class="bool-val">true</span>) => { |
| <span class="comment">// We are on a thread pool runtime thread, so we just need to |
| // set up blocking. |
| </span>had_entered = <span class="bool-val">true</span>; |
| } |
| ( |
| context::EnterRuntime::Entered { |
| allow_block_in_place, |
| }, |
| <span class="bool-val">false</span>, |
| ) => { |
| <span class="comment">// We are on an executor, but _not_ on the thread pool. That is |
| // _only_ okay if we are in a thread pool runtime's block_on |
| // method: |
| </span><span class="kw">if </span>allow_block_in_place { |
| had_entered = <span class="bool-val">true</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } <span class="kw">else </span>{ |
| <span class="comment">// This probably means we are on the current_thread runtime or in a |
| // LocalSet, where it is _not_ okay to block. |
| </span><span class="kw">return </span><span class="prelude-val">Err</span>( |
| <span class="string">"can call blocking only when running on the multi-threaded runtime"</span>, |
| ); |
| } |
| } |
| (context::EnterRuntime::NotEntered, <span class="bool-val">true</span>) => { |
| <span class="comment">// This is a nested call to block_in_place (we already exited). |
| // All the necessary setup has already been done. |
| </span><span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| (context::EnterRuntime::NotEntered, <span class="bool-val">false</span>) => { |
| <span class="comment">// We are outside of the tokio runtime, so blocking is fine. |
| // We can also skip all of the thread pool blocking setup steps. |
| </span><span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| } |
| |
| <span class="kw">let </span>cx = maybe_cx.expect(<span class="string">"no .is_some() == false cases above should lead here"</span>); |
| |
| <span class="comment">// Get the worker core. If none is set, then blocking is fine! |
| </span><span class="kw">let </span>core = <span class="kw">match </span>cx.core.borrow_mut().take() { |
| <span class="prelude-val">Some</span>(core) => core, |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="prelude-val">Ok</span>(()), |
| }; |
| |
| <span class="comment">// The parker should be set here |
| </span><span class="macro">assert!</span>(core.park.is_some()); |
| |
| <span class="comment">// In order to block, the core must be sent to another thread for |
| // execution. |
| // |
| // First, move the core back into the worker's shared core slot. |
| </span>cx.worker.core.set(core); |
| |
| <span class="comment">// Next, clone the worker handle and send it to a new thread for |
| // processing. |
| // |
| // Once the blocking task is done executing, we will attempt to |
| // steal the core back. |
| </span><span class="kw">let </span>worker = cx.worker.clone(); |
| runtime::spawn_blocking(<span class="kw">move </span>|| run(worker)); |
| <span class="prelude-val">Ok</span>(()) |
| }); |
| |
| <span class="kw">if let </span><span class="prelude-val">Err</span>(panic_message) = setup_result { |
| <span class="macro">panic!</span>(<span class="string">"{}"</span>, panic_message); |
| } |
| |
| <span class="kw">if </span>had_entered { |
| <span class="comment">// Unset the current task's budget. Blocking sections are not |
| // constrained by task budgets. |
| </span><span class="kw">let </span>_reset = Reset(coop::stop()); |
| |
| <span class="kw">crate</span>::runtime::context::exit_runtime(f) |
| } <span class="kw">else </span>{ |
| f() |
| } |
| } |
| |
| <span class="kw">impl </span>Launch { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>launch(<span class="kw-2">mut </span><span class="self">self</span>) { |
| <span class="kw">for </span>worker <span class="kw">in </span><span class="self">self</span>.<span class="number">0</span>.drain(..) { |
| runtime::spawn_blocking(<span class="kw">move </span>|| run(worker)); |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>run(worker: Arc<Worker>) { |
| <span class="kw">struct </span>AbortOnPanic; |
| |
| <span class="kw">impl </span>Drop <span class="kw">for </span>AbortOnPanic { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">if </span>std::thread::panicking() { |
| <span class="macro">eprintln!</span>(<span class="string">"worker thread panicking; aborting process"</span>); |
| std::process::abort(); |
| } |
| } |
| } |
| |
| <span class="comment">// Catching panics on worker threads in tests is quite tricky. Instead, when |
| // debug assertions are enabled, we just abort the process. |
| </span><span class="attribute">#[cfg(debug_assertions)] |
| </span><span class="kw">let </span>_abort_on_panic = AbortOnPanic; |
| |
| <span class="comment">// Acquire a core. If this fails, then another thread is running this |
| // worker and there is nothing further to do. |
| </span><span class="kw">let </span>core = <span class="kw">match </span>worker.core.take() { |
| <span class="prelude-val">Some</span>(core) => core, |
| <span class="prelude-val">None </span>=> <span class="kw">return</span>, |
| }; |
| |
| <span class="kw">let </span>handle = scheduler::Handle::MultiThread(worker.handle.clone()); |
| <span class="kw">let </span>_enter = <span class="kw">crate</span>::runtime::context::enter_runtime(<span class="kw-2">&</span>handle, <span class="bool-val">true</span>); |
| |
| <span class="comment">// Set the worker context. |
| </span><span class="kw">let </span>cx = Context { |
| worker, |
| core: RefCell::new(<span class="prelude-val">None</span>), |
| }; |
| |
| CURRENT.set(<span class="kw-2">&</span>cx, || { |
| <span class="comment">// This should always be an error. It only returns a `Result` to support |
| // using `?` to short circuit. |
| </span><span class="macro">assert!</span>(cx.run(core).is_err()); |
| |
| <span class="comment">// Check if there are any deferred tasks to notify. This can happen when |
| // the worker core is lost due to `block_in_place()` being called from |
| // within the task. |
| </span>wake_deferred_tasks(); |
| }); |
| } |
| |
| <span class="kw">impl </span>Context { |
| <span class="kw">fn </span>run(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">mut </span>core: Box<Core>) -> RunResult { |
| <span class="kw">while </span>!core.is_shutdown { |
| <span class="comment">// Increment the tick |
| </span>core.tick(); |
| |
| <span class="comment">// Run maintenance, if needed |
| </span>core = <span class="self">self</span>.maintenance(core); |
| |
| <span class="comment">// First, check work available to the current worker. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(task) = core.next_task(<span class="kw-2">&</span><span class="self">self</span>.worker) { |
| core = <span class="self">self</span>.run_task(task, core)<span class="question-mark">?</span>; |
| <span class="kw">continue</span>; |
| } |
| |
| <span class="comment">// There is no more **local** work to process, try to steal work |
| // from other workers. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(task) = core.steal_work(<span class="kw-2">&</span><span class="self">self</span>.worker) { |
| core = <span class="self">self</span>.run_task(task, core)<span class="question-mark">?</span>; |
| } <span class="kw">else </span>{ |
| <span class="comment">// Wait for work |
| </span>core = <span class="kw">if </span>did_defer_tasks() { |
| <span class="self">self</span>.park_timeout(core, <span class="prelude-val">Some</span>(Duration::from_millis(<span class="number">0</span>))) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.park(core) |
| }; |
| } |
| } |
| |
| core.pre_shutdown(<span class="kw-2">&</span><span class="self">self</span>.worker); |
| |
| <span class="comment">// Signal shutdown |
| </span><span class="self">self</span>.worker.handle.shutdown_core(core); |
| <span class="prelude-val">Err</span>(()) |
| } |
| |
| <span class="kw">fn </span>run_task(<span class="kw-2">&</span><span class="self">self</span>, task: Notified, <span class="kw-2">mut </span>core: Box<Core>) -> RunResult { |
| <span class="kw">let </span>task = <span class="self">self</span>.worker.handle.shared.owned.assert_owner(task); |
| |
| <span class="comment">// Make sure the worker is not in the **searching** state. This enables |
| // another idle worker to try to steal work. |
| </span>core.transition_from_searching(<span class="kw-2">&</span><span class="self">self</span>.worker); |
| |
| <span class="comment">// Make the core available to the runtime context |
| </span>core.metrics.incr_poll_count(); |
| <span class="kw-2">*</span><span class="self">self</span>.core.borrow_mut() = <span class="prelude-val">Some</span>(core); |
| |
| <span class="comment">// Run the task |
| </span>coop::budget(|| { |
| task.run(); |
| |
| <span class="comment">// As long as there is budget remaining and a task exists in the |
| // `lifo_slot`, then keep running. |
| </span><span class="kw">loop </span>{ |
| <span class="comment">// Check if we still have the core. If not, the core was stolen |
| // by another worker. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>core = <span class="kw">match </span><span class="self">self</span>.core.borrow_mut().take() { |
| <span class="prelude-val">Some</span>(core) => core, |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="prelude-val">Err</span>(()), |
| }; |
| |
| <span class="comment">// Check for a task in the LIFO slot |
| </span><span class="kw">let </span>task = <span class="kw">match </span>core.lifo_slot.take() { |
| <span class="prelude-val">Some</span>(task) => task, |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="prelude-val">Ok</span>(core), |
| }; |
| |
| <span class="kw">if </span>coop::has_budget_remaining() { |
| <span class="comment">// Run the LIFO task, then loop |
| </span>core.metrics.incr_poll_count(); |
| <span class="kw-2">*</span><span class="self">self</span>.core.borrow_mut() = <span class="prelude-val">Some</span>(core); |
| <span class="kw">let </span>task = <span class="self">self</span>.worker.handle.shared.owned.assert_owner(task); |
| task.run(); |
| } <span class="kw">else </span>{ |
| <span class="comment">// Not enough budget left to run the LIFO task, push it to |
| // the back of the queue and return. |
| </span>core.run_queue |
| .push_back(task, <span class="self">self</span>.worker.inject(), <span class="kw-2">&mut </span>core.metrics); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(core); |
| } |
| } |
| }) |
| } |
| |
| <span class="kw">fn </span>maintenance(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">mut </span>core: Box<Core>) -> Box<Core> { |
| <span class="kw">if </span>core.tick % <span class="self">self</span>.worker.handle.shared.config.event_interval == <span class="number">0 </span>{ |
| <span class="comment">// Call `park` with a 0 timeout. This enables the I/O driver, timer, ... |
| // to run without actually putting the thread to sleep. |
| </span>core = <span class="self">self</span>.park_timeout(core, <span class="prelude-val">Some</span>(Duration::from_millis(<span class="number">0</span>))); |
| |
| <span class="comment">// Run regularly scheduled maintenance |
| </span>core.maintenance(<span class="kw-2">&</span><span class="self">self</span>.worker); |
| } |
| |
| core |
| } |
| |
| <span class="doccomment">/// Parks the worker thread while waiting for tasks to execute. |
| /// |
| /// This function checks if indeed there's no more work left to be done before parking. |
| /// Also important to notice that, before parking, the worker thread will try to take |
| /// ownership of the Driver (IO/Time) and dispatch any events that might have fired. |
| /// Whenever a worker thread executes the Driver loop, all waken tasks are scheduled |
| /// in its own local queue until the queue saturates (ntasks > LOCAL_QUEUE_CAPACITY). |
| /// When the local queue is saturated, the overflow tasks are added to the injection queue |
| /// from where other workers can pick them up. |
| /// Also, we rely on the workstealing algorithm to spread the tasks amongst workers |
| /// after all the IOs get dispatched |
| </span><span class="kw">fn </span>park(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">mut </span>core: Box<Core>) -> Box<Core> { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(f) = <span class="kw-2">&</span><span class="self">self</span>.worker.handle.shared.config.before_park { |
| f(); |
| } |
| |
| <span class="kw">if </span>core.transition_to_parked(<span class="kw-2">&</span><span class="self">self</span>.worker) { |
| <span class="kw">while </span>!core.is_shutdown { |
| core.metrics.about_to_park(); |
| core = <span class="self">self</span>.park_timeout(core, <span class="prelude-val">None</span>); |
| core.metrics.returned_from_park(); |
| |
| <span class="comment">// Run regularly scheduled maintenance |
| </span>core.maintenance(<span class="kw-2">&</span><span class="self">self</span>.worker); |
| |
| <span class="kw">if </span>core.transition_from_parked(<span class="kw-2">&</span><span class="self">self</span>.worker) { |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(f) = <span class="kw-2">&</span><span class="self">self</span>.worker.handle.shared.config.after_unpark { |
| f(); |
| } |
| core |
| } |
| |
| <span class="kw">fn </span>park_timeout(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">mut </span>core: Box<Core>, duration: <span class="prelude-ty">Option</span><Duration>) -> Box<Core> { |
| <span class="comment">// Take the parker out of core |
| </span><span class="kw">let </span><span class="kw-2">mut </span>park = core.park.take().expect(<span class="string">"park missing"</span>); |
| |
| <span class="comment">// Store `core` in context |
| </span><span class="kw-2">*</span><span class="self">self</span>.core.borrow_mut() = <span class="prelude-val">Some</span>(core); |
| |
| <span class="comment">// Park thread |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(timeout) = duration { |
| park.park_timeout(<span class="kw-2">&</span><span class="self">self</span>.worker.handle.driver, timeout); |
| } <span class="kw">else </span>{ |
| park.park(<span class="kw-2">&</span><span class="self">self</span>.worker.handle.driver); |
| } |
| |
| wake_deferred_tasks(); |
| |
| <span class="comment">// Remove `core` from context |
| </span>core = <span class="self">self</span>.core.borrow_mut().take().expect(<span class="string">"core missing"</span>); |
| |
| <span class="comment">// Place `park` back in `core` |
| </span>core.park = <span class="prelude-val">Some</span>(park); |
| |
| <span class="comment">// If there are tasks available to steal, but this worker is not |
| // looking for tasks to steal, notify another worker. |
| </span><span class="kw">if </span>!core.is_searching && core.run_queue.is_stealable() { |
| <span class="self">self</span>.worker.handle.notify_parked(); |
| } |
| |
| core |
| } |
| } |
| |
| <span class="kw">impl </span>Core { |
| <span class="doccomment">/// Increment the tick |
| </span><span class="kw">fn </span>tick(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.tick = <span class="self">self</span>.tick.wrapping_add(<span class="number">1</span>); |
| } |
| |
| <span class="doccomment">/// Return the next notified task available to this worker. |
| </span><span class="kw">fn </span>next_task(<span class="kw-2">&mut </span><span class="self">self</span>, worker: <span class="kw-2">&</span>Worker) -> <span class="prelude-ty">Option</span><Notified> { |
| <span class="kw">if </span><span class="self">self</span>.tick % worker.handle.shared.config.global_queue_interval == <span class="number">0 </span>{ |
| worker.inject().pop().or_else(|| <span class="self">self</span>.next_local_task()) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.next_local_task().or_else(|| worker.inject().pop()) |
| } |
| } |
| |
| <span class="kw">fn </span>next_local_task(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Notified> { |
| <span class="self">self</span>.lifo_slot.take().or_else(|| <span class="self">self</span>.run_queue.pop()) |
| } |
| |
| <span class="doccomment">/// Function responsible for stealing tasks from another worker |
| /// |
| /// Note: Only if less than half the workers are searching for tasks to steal |
| /// a new worker will actually try to steal. The idea is to make sure not all |
| /// workers will be trying to steal at the same time. |
| </span><span class="kw">fn </span>steal_work(<span class="kw-2">&mut </span><span class="self">self</span>, worker: <span class="kw-2">&</span>Worker) -> <span class="prelude-ty">Option</span><Notified> { |
| <span class="kw">if </span>!<span class="self">self</span>.transition_to_searching(worker) { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="kw">let </span>num = worker.handle.shared.remotes.len(); |
| <span class="comment">// Start from a random worker |
| </span><span class="kw">let </span>start = <span class="self">self</span>.rand.fastrand_n(num <span class="kw">as </span>u32) <span class="kw">as </span>usize; |
| |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..num { |
| <span class="kw">let </span>i = (start + i) % num; |
| |
| <span class="comment">// Don't steal from ourself! We know we don't have work. |
| </span><span class="kw">if </span>i == worker.index { |
| <span class="kw">continue</span>; |
| } |
| |
| <span class="kw">let </span>target = <span class="kw-2">&</span>worker.handle.shared.remotes[i]; |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(task) = target |
| .steal |
| .steal_into(<span class="kw-2">&mut </span><span class="self">self</span>.run_queue, <span class="kw-2">&mut </span><span class="self">self</span>.metrics) |
| { |
| <span class="kw">return </span><span class="prelude-val">Some</span>(task); |
| } |
| } |
| |
| <span class="comment">// Fallback on checking the global queue |
| </span>worker.handle.shared.inject.pop() |
| } |
| |
| <span class="kw">fn </span>transition_to_searching(<span class="kw-2">&mut </span><span class="self">self</span>, worker: <span class="kw-2">&</span>Worker) -> bool { |
| <span class="kw">if </span>!<span class="self">self</span>.is_searching { |
| <span class="self">self</span>.is_searching = worker.handle.shared.idle.transition_worker_to_searching(); |
| } |
| |
| <span class="self">self</span>.is_searching |
| } |
| |
| <span class="kw">fn </span>transition_from_searching(<span class="kw-2">&mut </span><span class="self">self</span>, worker: <span class="kw-2">&</span>Worker) { |
| <span class="kw">if </span>!<span class="self">self</span>.is_searching { |
| <span class="kw">return</span>; |
| } |
| |
| <span class="self">self</span>.is_searching = <span class="bool-val">false</span>; |
| worker.handle.transition_worker_from_searching(); |
| } |
| |
| <span class="doccomment">/// Prepares the worker state for parking. |
| /// |
| /// Returns true if the transition happened, false if there is work to do first. |
| </span><span class="kw">fn </span>transition_to_parked(<span class="kw-2">&mut </span><span class="self">self</span>, worker: <span class="kw-2">&</span>Worker) -> bool { |
| <span class="comment">// Workers should not park if they have work to do |
| </span><span class="kw">if </span><span class="self">self</span>.lifo_slot.is_some() || <span class="self">self</span>.run_queue.has_tasks() { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| |
| <span class="comment">// When the final worker transitions **out** of searching to parked, it |
| // must check all the queues one last time in case work materialized |
| // between the last work scan and transitioning out of searching. |
| </span><span class="kw">let </span>is_last_searcher = worker |
| .handle |
| .shared |
| .idle |
| .transition_worker_to_parked(worker.index, <span class="self">self</span>.is_searching); |
| |
| <span class="comment">// The worker is no longer searching. Setting this is the local cache |
| // only. |
| </span><span class="self">self</span>.is_searching = <span class="bool-val">false</span>; |
| |
| <span class="kw">if </span>is_last_searcher { |
| worker.handle.notify_if_work_pending(); |
| } |
| |
| <span class="bool-val">true |
| </span>} |
| |
| <span class="doccomment">/// Returns `true` if the transition happened. |
| </span><span class="kw">fn </span>transition_from_parked(<span class="kw-2">&mut </span><span class="self">self</span>, worker: <span class="kw-2">&</span>Worker) -> bool { |
| <span class="comment">// If a task is in the lifo slot, then we must unpark regardless of |
| // being notified |
| </span><span class="kw">if </span><span class="self">self</span>.lifo_slot.is_some() { |
| <span class="comment">// When a worker wakes, it should only transition to the "searching" |
| // state when the wake originates from another worker *or* a new task |
| // is pushed. We do *not* want the worker to transition to "searching" |
| // when it wakes when the I/O driver receives new events. |
| </span><span class="self">self</span>.is_searching = !worker.handle.shared.idle.unpark_worker_by_id(worker.index); |
| <span class="kw">return </span><span class="bool-val">true</span>; |
| } |
| |
| <span class="kw">if </span>worker.handle.shared.idle.is_parked(worker.index) { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| |
| <span class="comment">// When unparked, the worker is in the searching state. |
| </span><span class="self">self</span>.is_searching = <span class="bool-val">true</span>; |
| <span class="bool-val">true |
| </span>} |
| |
| <span class="doccomment">/// Runs maintenance work such as checking the pool's state. |
| </span><span class="kw">fn </span>maintenance(<span class="kw-2">&mut </span><span class="self">self</span>, worker: <span class="kw-2">&</span>Worker) { |
| <span class="self">self</span>.metrics |
| .submit(<span class="kw-2">&</span>worker.handle.shared.worker_metrics[worker.index]); |
| |
| <span class="kw">if </span>!<span class="self">self</span>.is_shutdown { |
| <span class="comment">// Check if the scheduler has been shutdown |
| </span><span class="self">self</span>.is_shutdown = worker.inject().is_closed(); |
| } |
| } |
| |
| <span class="doccomment">/// Signals all tasks to shut down, and waits for them to complete. Must run |
| /// before we enter the single-threaded phase of shutdown processing. |
| </span><span class="kw">fn </span>pre_shutdown(<span class="kw-2">&mut </span><span class="self">self</span>, worker: <span class="kw-2">&</span>Worker) { |
| <span class="comment">// Signal to all tasks to shut down. |
| </span>worker.handle.shared.owned.close_and_shutdown_all(); |
| |
| <span class="self">self</span>.metrics |
| .submit(<span class="kw-2">&</span>worker.handle.shared.worker_metrics[worker.index]); |
| } |
| |
| <span class="doccomment">/// Shuts down the core. |
| </span><span class="kw">fn </span>shutdown(<span class="kw-2">&mut </span><span class="self">self</span>, handle: <span class="kw-2">&</span>Handle) { |
| <span class="comment">// Take the core |
| </span><span class="kw">let </span><span class="kw-2">mut </span>park = <span class="self">self</span>.park.take().expect(<span class="string">"park missing"</span>); |
| |
| <span class="comment">// Drain the queue |
| </span><span class="kw">while </span><span class="self">self</span>.next_local_task().is_some() {} |
| |
| park.shutdown(<span class="kw-2">&</span>handle.driver); |
| } |
| } |
| |
| <span class="kw">impl </span>Worker { |
| <span class="doccomment">/// Returns a reference to the scheduler's injection queue. |
| </span><span class="kw">fn </span>inject(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>Inject<Arc<Handle>> { |
| <span class="kw-2">&</span><span class="self">self</span>.handle.shared.inject |
| } |
| } |
| |
| <span class="comment">// TODO: Move `Handle` impls into handle.rs |
| </span><span class="kw">impl </span>task::Schedule <span class="kw">for </span>Arc<Handle> { |
| <span class="kw">fn </span>release(<span class="kw-2">&</span><span class="self">self</span>, task: <span class="kw-2">&</span>Task) -> <span class="prelude-ty">Option</span><Task> { |
| <span class="self">self</span>.shared.owned.remove(task) |
| } |
| |
| <span class="kw">fn </span>schedule(<span class="kw-2">&</span><span class="self">self</span>, task: Notified) { |
| <span class="self">self</span>.schedule_task(task, <span class="bool-val">false</span>); |
| } |
| |
| <span class="kw">fn </span>yield_now(<span class="kw-2">&</span><span class="self">self</span>, task: Notified) { |
| <span class="self">self</span>.schedule_task(task, <span class="bool-val">true</span>); |
| } |
| } |
| |
| <span class="kw">impl </span>Handle { |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>schedule_task(<span class="kw-2">&</span><span class="self">self</span>, task: Notified, is_yield: bool) { |
| CURRENT.with(|maybe_cx| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(cx) = maybe_cx { |
| <span class="comment">// Make sure the task is part of the **current** scheduler. |
| </span><span class="kw">if </span><span class="self">self</span>.ptr_eq(<span class="kw-2">&</span>cx.worker.handle) { |
| <span class="comment">// And the current thread still holds a core |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(core) = cx.core.borrow_mut().as_mut() { |
| <span class="self">self</span>.schedule_local(core, task, is_yield); |
| <span class="kw">return</span>; |
| } |
| } |
| } |
| |
| <span class="comment">// Otherwise, use the inject queue. |
| </span><span class="self">self</span>.shared.inject.push(task); |
| <span class="self">self</span>.shared.scheduler_metrics.inc_remote_schedule_count(); |
| <span class="self">self</span>.notify_parked(); |
| }) |
| } |
| |
| <span class="kw">fn </span>schedule_local(<span class="kw-2">&</span><span class="self">self</span>, core: <span class="kw-2">&mut </span>Core, task: Notified, is_yield: bool) { |
| core.metrics.inc_local_schedule_count(); |
| |
| <span class="comment">// Spawning from the worker thread. If scheduling a "yield" then the |
| // task must always be pushed to the back of the queue, enabling other |
| // tasks to be executed. If **not** a yield, then there is more |
| // flexibility and the task may go to the front of the queue. |
| </span><span class="kw">let </span>should_notify = <span class="kw">if </span>is_yield || <span class="self">self</span>.shared.config.disable_lifo_slot { |
| core.run_queue |
| .push_back(task, <span class="kw-2">&</span><span class="self">self</span>.shared.inject, <span class="kw-2">&mut </span>core.metrics); |
| <span class="bool-val">true |
| </span>} <span class="kw">else </span>{ |
| <span class="comment">// Push to the LIFO slot |
| </span><span class="kw">let </span>prev = core.lifo_slot.take(); |
| <span class="kw">let </span>ret = prev.is_some(); |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(prev) = prev { |
| core.run_queue |
| .push_back(prev, <span class="kw-2">&</span><span class="self">self</span>.shared.inject, <span class="kw-2">&mut </span>core.metrics); |
| } |
| |
| core.lifo_slot = <span class="prelude-val">Some</span>(task); |
| |
| ret |
| }; |
| |
| <span class="comment">// Only notify if not currently parked. If `park` is `None`, then the |
| // scheduling is from a resource driver. As notifications often come in |
| // batches, the notification is delayed until the park is complete. |
| </span><span class="kw">if </span>should_notify && core.park.is_some() { |
| <span class="self">self</span>.notify_parked(); |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>close(<span class="kw-2">&</span><span class="self">self</span>) { |
| <span class="kw">if </span><span class="self">self</span>.shared.inject.close() { |
| <span class="self">self</span>.notify_all(); |
| } |
| } |
| |
| <span class="kw">fn </span>notify_parked(<span class="kw-2">&</span><span class="self">self</span>) { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(index) = <span class="self">self</span>.shared.idle.worker_to_notify() { |
| <span class="self">self</span>.shared.remotes[index].unpark.unpark(<span class="kw-2">&</span><span class="self">self</span>.driver); |
| } |
| } |
| |
| <span class="kw">fn </span>notify_all(<span class="kw-2">&</span><span class="self">self</span>) { |
| <span class="kw">for </span>remote <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.shared.remotes[..] { |
| remote.unpark.unpark(<span class="kw-2">&</span><span class="self">self</span>.driver); |
| } |
| } |
| |
| <span class="kw">fn </span>notify_if_work_pending(<span class="kw-2">&</span><span class="self">self</span>) { |
| <span class="kw">for </span>remote <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.shared.remotes[..] { |
| <span class="kw">if </span>!remote.steal.is_empty() { |
| <span class="self">self</span>.notify_parked(); |
| <span class="kw">return</span>; |
| } |
| } |
| |
| <span class="kw">if </span>!<span class="self">self</span>.shared.inject.is_empty() { |
| <span class="self">self</span>.notify_parked(); |
| } |
| } |
| |
| <span class="kw">fn </span>transition_worker_from_searching(<span class="kw-2">&</span><span class="self">self</span>) { |
| <span class="kw">if </span><span class="self">self</span>.shared.idle.transition_worker_from_searching() { |
| <span class="comment">// We are the final searching worker. Because work was found, we |
| // need to notify another worker. |
| </span><span class="self">self</span>.notify_parked(); |
| } |
| } |
| |
| <span class="doccomment">/// Signals that a worker has observed the shutdown signal and has replaced |
| /// its core back into its handle. |
| /// |
| /// If all workers have reached this point, the final cleanup is performed. |
| </span><span class="kw">fn </span>shutdown_core(<span class="kw-2">&</span><span class="self">self</span>, core: Box<Core>) { |
| <span class="kw">let </span><span class="kw-2">mut </span>cores = <span class="self">self</span>.shared.shutdown_cores.lock(); |
| cores.push(core); |
| |
| <span class="kw">if </span>cores.len() != <span class="self">self</span>.shared.remotes.len() { |
| <span class="kw">return</span>; |
| } |
| |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.shared.owned.is_empty()); |
| |
| <span class="kw">for </span><span class="kw-2">mut </span>core <span class="kw">in </span>cores.drain(..) { |
| core.shutdown(<span class="self">self</span>); |
| } |
| |
| <span class="comment">// Drain the injection queue |
| // |
| // We already shut down every task, so we can simply drop the tasks. |
| </span><span class="kw">while let </span><span class="prelude-val">Some</span>(task) = <span class="self">self</span>.shared.inject.pop() { |
| drop(task); |
| } |
| } |
| |
| <span class="kw">fn </span>ptr_eq(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>Handle) -> bool { |
| std::ptr::eq(<span class="self">self</span>, other) |
| } |
| } |
| |
| <span class="kw">fn </span>did_defer_tasks() -> bool { |
| context::with_defer(|deferred| !deferred.is_empty()).unwrap() |
| } |
| |
| <span class="kw">fn </span>wake_deferred_tasks() { |
| context::with_defer(|deferred| deferred.wake()); |
| } |
| |
| <span class="macro">cfg_metrics! </span>{ |
| <span class="kw">impl </span>Shared { |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>injection_queue_depth(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.inject.len() |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>worker_local_queue_depth(<span class="kw-2">&</span><span class="self">self</span>, worker: usize) -> usize { |
| <span class="self">self</span>.remotes[worker].steal.len() |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../../" data-current-crate="tokio" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
