Busy Wait Forever. Problem of Scheduler.

[mhomidi]

This code does not work if we only start quark with cpus <= 60:

#include <iostream>
#include <thread>
#include <vector>
#include <atomic>

std::atomic<bool> run(true);

void busy_wait() {
    while (run);
}

int main() {
    std::vector<std::thread> threads;

    for (int i = 0; i < 60; ++i) {
        threads.emplace_back(busy_wait);
    }

    // Let the threads run for a short duration
    std::this_thread::sleep_for(std::chrono::seconds(5));
    run = false;

    for (auto& t : threads) {
        if (t.joinable()) {
            t.join();
        }
    }

    std::cout << "All threads completed and exited." << std::endl;
    return 0;
}

It seems that when main thread goes to sleep, it can not wake up forever. Do you have any solution for this problem?