message: Use swoole process mode.
diff: @@ -16,7 +16,7 @@ $pm->parentFunc = function () use ($pm) {
  echo "DONE\n";
  };
  $pm->childFunc = function () use ($pm, $reloaded) {
  - $server = new Swoole\Server('127.0.0.1', $pm->getFreePort(), SERVER_MODE_RANDOM);
  + $server = new Swoole\Server('127.0.0.1', $pm->getFreePort(), SWOOLE_PROCESS);
  $server->set([
  'log_file' => '/dev/null',
  'worker_num' => mt_rand(2, swoole_cpu_num() * 2),
  