threadpool

Answering the question: Task.Yield - real usages? I proposed to use Task.Yield allowing a pool thread to be reused by other tasks. In such pattern: CancellationTokenSource cts; void Start() { cts = new CancellationTokenSource(); // run async operation var task = Task.Run(() => SomeWork(cts.Token), cts.Token); // wait for completion // after the completion handle the result/ cancellation/ errors } async Task<int> SomeWork(CancellationToken cancellationToken) { int result = 0; bool loopAgain = true; while (loopAgain) { // do something ... means a substantial work or a micro batch here - not

Please check the code sample below: public class Sample { public int counter { get; set; } public string ID; public void RunCount() { for (int i = 0; i < counter; i++) { Thread.Sleep(1000); Console.WriteLine(this.ID + " : " + i.ToString()); } } } class Test { static void Main() { Sample[] arrSample = new Sample[4]; for (int i = 0; i < arrSample.Length; i++) { arrSample[i] = new Sample(); arrSample[i].ID = "Sample-" + i.ToString(); arrSample[i].counter = 10; } foreach (Sample s in arrSample) { ThreadPool.QueueUserWorkItem(callback => s.RunCount()); } Console.ReadKey(); } } The expected output

序 本文主要研究一下HystrixPropertiesStrategy HystrixPropertiesStrategy hystrix-core-1.5.12-sources.jar!/com/netflix/hystrix/strategy/properties/HystrixPropertiesStrategy.java /** * Abstract class with default implementations of factory methods for properties used by various components of Hystrix. * <p> * See {@link HystrixPlugins} or the Hystrix GitHub Wiki for information on configuring plugins: <a * href="https://github.com/Netflix/Hystrix/wiki/Plugins">https://github.com/Netflix/Hystrix/wiki/Plugins</a>. */ public abstract class HystrixPropertiesStrategy { /** * Construct an implementation of {@link

I am using the ThreadPool to queue 1000's of workitems While(reading in data for processing) { args = some data that has been read; ThreadPool.QueueUserWorkItem(new WaitCallback(threadRunner), args); } This is working very well, however, as the main thread queues the requests faster than they are processed memory is slowly eaten up. I would like to do something akin to the following to throttle the queueing as the queue grows Thread.Sleep(numberOfItemsCurrentlyQueued); This would result in longer waits as the queue grows. Is there any way to discover how many items are in the queue? I don't

序 本文主要研究一下HystrixThreadPool HystrixThreadPool hystrix-core-1.5.12-sources.jar!/com/netflix/hystrix/HystrixThreadPool.java /** * ThreadPool used to executed {@link HystrixCommand#run()} on separate threads when configured to do so with {@link HystrixCommandProperties#executionIsolationStrategy()}. * <p> * Typically each {@link HystrixCommandGroupKey} has its own thread-pool so that any one group of commands can not starve others from being able to run. * <p> * A {@link HystrixCommand} can be configured with a thread-pool explicitly by injecting a {@link HystrixThreadPoolKey} or via the * {@link

For whatever reason, ThreadPool 's QueueWorkItem doesn't return an IAsyncResult or some other handle to the work item, which would allow to wait until it's completed. There are RegisterWait... methods, but you have to pass a WaitHandle and creating them is expensive (see IAsyncResult documentation, which advises you to delay creating a WaitHandle until requested). The Task Parallel Library will fix this lack, but there is a long wait before that's available. So, are there any problems with this design: public class Concurrent<T> { private ManualResetEvent _resetEvent; private T _result; public

I am developing a networked application in Twisted, part of which consists of a web interface written in Django. I wish to use Twisted's WSGI server to host the web interface, and I've written a working "tap" plugin to allow me to use twistd . When running the server with the -n flag (don't daemonize) everything works fine, but when this flag is removed the server doesn't respond to requests at all, and there are no messages logged (though the server is still running). There is a bug on Twisted's Trac which seems to describe the problem exactly, and my plugin happens to be based on the code

This question already has an answer here: async - stay on the current thread? 3 answers I am working with async-await and tasks, but I can't understand the one thing: Is async task executes in separate thread? As msdn says ( Asynchronous programming ): The async and await keywords don't cause additional threads to be created. Async methods don't require multithreading because an async method doesn't run on its own thread. But in the remarks in description of ThreadPool class ( ThreadPool Class ): Examples of operations that use thread pool threads include the following: When you create a Task