swoole是事件驱动的，server.php一直监听端口，当客户端有数据流过去，则进行监听读取，并进处理。

安装环境

应该保证系统中安装了如下软件

gcc-4.4+
make
autoconf

PECL安装

pecl install swoole

php.ini 配置

extension=swoole.so

查看是否安装成功

php -m | grep swoole
> swoole

swoole升级

查看当前版本

php --ri swoole | grep Version
#结果
> Version => 1.9.6

pecl升级

pecl upgrade swoole                                         

swoole进程初识

swoole 默认是多进程模式
Master进程 / Manager进程 / Worker进程 / Task进程

server实例代码

server-process.php

$serv = new swoole_server('127.0.0.1', 9501);
$serv->set([
    'worker_num' => 2,
    'task_worker_num' => 1,
]);
$serv->on('Connect', function ($serv, $fd) {
});
$serv->on('Receive', function ($serv, $fd, $fromId, $data) {
});
$serv->on('Close', function ($serv, $fd) {
});
$serv->on('Task', function ($serv, $taskId, $fromId, $data) {
});
$serv->on('Finish', function ($serv, $taskId, $data) {
});

$serv->start();

对实例代码 进行pstree进程关系

pstree的结果有5个进程，因为swoole的进程模型是（Master-Manager-Worker），5个进程 = master进程(1个) + manager进程(1个) + worker_num(2个) + task_worker_num(1个)

$ pstree | grep server-process

 | |   \-+= 02548 php server-process.php
 | |     \-+- 02549 php server-process.php
 | |       |--- 02550 php server-process.php
 | |       |--- 02551 php server-process.php
 | |       \--- 02552 php server-process.php
 |     \--- 02572 grep server-process

从结果可以看出：
02548 是Master进程，它处于“root”层级
02549 是Manager进程
Worker进程和Task进程就是 02550、02551和02552

设置进程名称备注，再进行pstree进程关系

Master进程：
    启动：onStart
    关闭：onShutdown
Manager进程：
    启动：onManagerStart
    关闭：onManagerStop
Worker进程：
    启动：onWorkerStart
    关闭：onWorkerStop

mac下不支持swoole_set_process_name函数，可以用centos进行测试

$serv->on("start", function ($serv){
    swoole_set_process_name('server-process: master');
});
// 以下回调发生在Manager进程
$serv->on('ManagerStart', function ($serv){
    swoole_set_process_name('server-process: manager');
});
$serv->on('WorkerStart', function ($serv, $workerId){
    if($workerId < $serv->setting['worker_num']) {
        // $workerId = 0~worker_num之间，则为worker进程
        swoole_set_process_name("server-process: worker");
    } else {
        // $workerId >= worker_num之间，则为task进程
        swoole_set_process_name("server-process: task");
    }
});

ps出来的结果

# ps aux | grep server-process
root     27546  xxx... server-process: master
root     27547  xxx... server-process: manager
root     27549  xxx... server-process: task worker
root     27550  xxx... server-process: worker
root     27551  xxx... server-process: worker
root     27570  xxx... grep --color=auto simple