我如何知道我已经达到了Node中定义的线程限制？

const os = require('os');

const cpuCores = os.cpus().length;
console.log(`CPU核心数: ${cpuCores}`);

const { Worker, isMainThread, parentPort } = require('worker_threads');

if (isMainThread) {
  const maxThreads = 10; // 假设最大线程数为10
  let activeThreads = 0;

  function createWorker() {
    if (activeThreads >= maxThreads) {
      console.log('已达到线程限制');
      return;
    }
    activeThreads++;
    const worker = new Worker(__filename);
    worker.on('exit', () => {
      activeThreads--;
    });
  }

  for (let i = 0; i < 15; i++) {
    createWorker();
  }
} else {
  // 工作线程逻辑
  parentPort.postMessage('工作线程启动');
}

const os = require('os');

function monitorSystemResources() {
  const cpuUsage = process.cpuUsage();
  const memoryUsage = process.memoryUsage();

  console.log(`CPU使用时间: ${cpuUsage.user}ms, ${cpuUsage.system}ms`);
  console.log(`内存使用: ${memoryUsage.rss / 1024 / 1024}MB, 堆内存: ${memoryUsage.heapUsed / 1024 / 1024}MB`);
}

setInterval(monitorSystemResources, 5000);