Tizimda yukni boshqarish qanday amalga oshirilgan?

C / C++ tizimlarida yukni boshqarish odatda bir nechta usul bilan amalga oshiriladi:

• Ip yotqizishlarni muvofiqlashtirish: CPU resurslaridan teng foydalanish uchun vazifalarni iplar orasida taqsimlash.
• Vazifa navbatlaridan foydalanish: vazifalar navbatga qo'yiladi va resurslar bo'shatilgan sari bajariladi.
• Ip havuz: cheklangan sonli iplar yaratish va vazifalarni bajarish uchun qayta ishlatish, iplarni yaratish va yo'q qilish xarajatlarini oldini olish.
• Monitoring va moslashtirish: joriy yukni kuzatish va parametrlarni dinamik o'zgartirish (masalan, iplar soni).

C++11 da oddiy ip havuzining misoli:

#include <iostream>
#include <thread>
#include <vector>
#include <queue>
#include <mutex>
#include <condition_variable>
#include <functional>

class ThreadPool {
    std::vector<std::thread> workers;
    std::queue<std::function<void()>> tasks;
    std::mutex queue_mutex;
    std::condition_variable condition;
    bool stop = false;

public:
    ThreadPool(size_t threads) {
        for(size_t i = 0; i < threads; ++i)
            workers.emplace_back([this] {
                for(;;) {
                    std::function<void()> task;
                    {
                        std::unique_lock<std::mutex> lock(this->queue_mutex);
                        this->condition.wait(lock, [this]{ return this->stop || !this->tasks.empty(); });
                        if(this->stop && this->tasks.empty())
                            return;
                        task = std::move(this->tasks.front());
                        this->tasks.pop();
                    }
                    task();
                }
            });
    }

    template<class F>
    void enqueue(F&& f) {
        {
            std::unique_lock<std::mutex> lock(queue_mutex);
            tasks.emplace(std::forward<F>(f));
        }
        condition.notify_one();
    }

    ~ThreadPool() {
        {
            std::unique_lock<std::mutex> lock(queue_mutex);
            stop = true;
        }
        condition.notify_all();
        for(std::thread &worker: workers)
            worker.join();
    }
};