Note: if you are limiting this to “3” just so you don’t overwhelm the machine running your app, I’d make sure this is a problem first. The threadpool is supposed to manage this for you. On the other hand, if you don’t want to overwhelm some other resource, then read on! You can’t manage the … Read more
The set of ThreadLocal instances associated with a thread are held in private members of each Thread. Your only chance to enumerate these is to do some reflection on the Thread; this way, you can override the access restrictions on the thread’s fields. Once you can get the set of ThreadLocal, you could copy in … Read more
Actually I use the following to replace WaitHandle.WaitAll(doneEvents); foreach (var e in doneEvents) e.WaitOne();
Well. That’s really quite simple; You’re rejecting the tasks posted! template< typename Task > void run_task(task task){ boost::unique_lock<boost::mutex> lock( mutex_ ); if(0 < available_) { –available_; io_service_.post(boost::bind(&tpool::wrap_task, this, boost::function< void() > ( task ))); } } Note that the lock “waits” until the mutex is not owned by a thread. This might already be the … Read more
The best practice is not to reuse the pool (what would be the use of pooling, if you keep creating new pools?). If you want to be sure you “time” the batches together, I’d suggest using when_all on futures: Live On Coliru #define BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY #include <iostream> #include <boost/bind.hpp> #include <boost/asio.hpp> #include <boost/thread.hpp> uint64_t foo(uint64_t begin) … Read more
Yes, LongRunning forces the creation of a new thread outside the pool. Here’s some pseudo-disassembled code from the latest framework version: … if (task.Options HasFlag LongRunning) then create new Thread thread thread.Start(task) … Edit: converted from ugly C# to pseudocode.
Sounds like you should stay with the defaults 😉 Seriously: The number of maximum parallel connections you should set depends on your expected tomcat usage and also on the number of cores on your server. More cores on your processor => more parallel threads that can be executed. See here how to configure… Tomcat 10: … Read more
If there is no need to create new Thread in ThreadPool scenario, then how it works with same thread which just finished its run method, will that Thread can be used again? Simple – the original thread never actually completes. It just waits for another task to execute. In pseudo-code: // No, this isn’t even … Read more
The objective of the Tasks namespace is to provide a pluggable architecture to make multi-tasking applications easier to write and more flexible. The implementation uses a TaskScheduler object to control the handling of tasks. This has virtual methods that you can override to create your own task handling. Methods include for instance protected virtual void … Read more
The multiprocessing.pool.ThreadPool behaves the same as the multiprocessing.Pool with the only difference that uses threads instead of processes to run the workers logic. The reason you see hi outside of main() being printed multiple times with the multiprocessing.Pool is due to the fact that the pool will spawn 5 independent processes. Each process will initialize … Read more