简单介绍

使用php、swoole的event模块、pcntl扩展，实现单进程阻塞io模型，单进程epoll，多进程epoll，代码中有详细注释，以便学习使用

单进程阻塞io

worker.php

单进程epoll

worker_epoll.php，需要安装swoole扩展（pecl install swoole）

多进程epoll

workers_epoll.php以及run.php，运行run.php，wokers_epoll.php为类，需要安装pcntl扩展，使用多进程

压测

使用ab压测，单进程epoll和多进程epoll的每秒处理请求数相差不大，主要差别表现在p99处理的完成时间上

# 多进程，开3个进程+ ab -n20000 -c100 -k Concurrency Level: 100 Time taken for tests: 0.376 seconds Complete requests: 20000 Failed requests: 0 Keep-Alive requests: 20000 Total transferred: 2800000 bytes HTML transferred: 220000 bytes Requests per second: 53188.66 [#/sec] (mean) Time per request: 1.880 [ms] (mean) Time per request: 0.019 [ms] (mean, across all concurrent requests) Transfer rate: 7271.89 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.1 0 1 Processing: 1 2 0.3 2 4 Waiting: 1 2 0.3 2 4 Total: 1 2 0.4 2 5 Percentage of the requests served within a certain time (ms) 50% 2 66% 2 75% 2 80% 2 90% 2 95% 2 98% 3 99% 3 100% 5 (longest request)

#单进程 ab -n20000 -c20000 -k Concurrency Level: 10000 Time taken for tests: 0.369 seconds Complete requests: 10000 Failed requests: 0 Keep-Alive requests: 10000 Total transferred: 1400000 bytes HTML transferred: 110000 bytes Requests per second: 27105.27 [#/sec] (mean) Time per request: 368.932 [ms] (mean) Time per request: 0.037 [ms] (mean, across all concurrent requests) Transfer rate: 3705.80 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 4 21.7 0 131 Processing: 4 7 2.4 5 14 Waiting: 4 7 2.4 5 14 Total: 4 11 21.5 5 137 Percentage of the requests served within a certain time (ms) 50% 5 66% 10 75% 10 80% 10 90% 10 95% 10 98% 129 99% 133 100% 137 (longest request)