threadpool

In this blog I found a pretty neat example on how to create a simple thread pool using boost::asio. I basically want to use it like this: #include <thread> #include <functional> #include <boost/asio.hpp> int main ( int argc, char* argv[] ) { asio::io_service io_service; asio::io_service::work work(io_service); std::vector<std::thread> threadPool; for(size_t t = 0; t < std::thread::hardware_concurrency(); t++){ threadPool.push_back(thread(std::bind(&asio::io_service::run, &io_service))); } io_service.post(std::bind(an_expensive_calculation, 42)); io_service.post(std::bind(a_long_running_task,

I read on the other day that for long-running tasks my best bet is to manually create threads instead of using .NET’s thread pool or Task Parallel. I'd really like someone to enlighten me as I am learning about c# threading, specially for long running IO tasks. Thank you in advance. Nicholas Butler That is true. The thread pool is optimised for small units of work and you can interfere with other work by holding onto a thread pool thread. My rule of thumb is if an operation can take more than a second, it should not be on a thread pool thread. That is probably quite long. Although this is

I'm using java.util.concurrent 's Executors class to create a fixed thread pool for running request handlers for a web server: static ExecutorService newFixedThreadPool(int nThreads) and the description is: Creates a thread pool that reuses a fixed set of threads operating off a shared unbounded queue. However, I am looking for thread pool implementation which will do the exact same thing, except with a bounded queue. Is there such an implementation? Or do I need to implement my own wrapper for the fixed thread pool? lscoughlin What you want to do is new your own ExecutorService, probably

I'm running a process in a separate thread with a timeout, using an ExecutorService and a Future (example code here ) (the thread "spawning" takes place in a AOP Aspect). Now, the main thread is a Resteasy request. Resteasy uses one ore more ThreadLocal variables to store some context information that I need to retrieve at some point in my Rest method call. Problem is, since the Resteasy thread is running in a new thread, the ThreadLocal variables are lost. What would be the best way to "propagate" whatever ThreadLocal variable is used by Resteasy to the new thread? It seems that Resteasy uses

Whats the difference between ThreadPool and Pool in multiprocessing module. When I try my code out, this is the main difference I see: from multiprocessing import Pool import os, time print("hi outside of main()") def hello(x): print("inside hello()") print("Proccess id: ", os.getpid()) time.sleep(3) return x*x if __name__ == "__main__": p = Pool(5) pool_output = p.map(hello, range(3)) print(pool_output) I see the following output: hi outside of main() hi outside of main() hi outside of main() hi outside of main() hi outside of main() hi outside of main() inside hello() Proccess id: 13268

What is the use of a Thread pool? Is there a good real world example? Amir Rachum A thread pool is a group of threads initially created that waits for jobs and executes them. The idea is to have the threads always existing, so that we won't have to pay overhead time for creating them every time. They are appropriate when we know there's a stream of jobs to process, even though there could be some time when there are no jobs. Here's a nice diagram from Wikipedia : Justin Ethier Thread Pools from the Java Tutorials has a good overview: Using worker threads minimizes the overhead due to thread