Intel(R) Xeon(R) CPU X5687 @ 3.60GHz X 16(超线程),
48G Memory
php-fpm 采用固定32个worker, opcache采用默认的配置(一定要记得加载opcache)
以wordpress 4.1为优化场景..
首先我们来测试下目前WP在PHP7的性能(ab -n 10000 -c 100):
$ ab -n 10000 -c 100 :8000/wordpress/
This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, Licensed to The Apache Software Foundation, Benchmarking inf-dev-maybach.weibo.com (be patient) Completed 1000 requests Completed 2000 requests Completed 3000 requests Completed 4000 requests Completed 5000 requests Completed 6000 requests Completed 7000 requests Completed 8000 requests Completed 9000 requests Completed 10000 requests Finished 10000 requests Server Software: nginx/1.7.12 Server Hostname: inf-dev-maybach.weibo.com Server Port: 8000 Document Path: /wordpress/ Document Length: 9048 bytes Concurrency Level: 100 Time taken for tests: 8.957 seconds Complete requests: 10000 Failed requests: 0 Write errors: 0 Total transferred: 92860000 bytes HTML transferred: 90480000 bytes Requests per second: 1116.48 [#/sec] (mean) Time per request: 89.567 [ms] (mean) Time per request: 0.896 [ms] (mean, across all concurrent requests) Transfer rate: 10124.65 [Kbytes/sec] received
可见Wordpress 4.1 目前在这个机器上, 首页的QPS可以到1116.48. 也就是每秒钟可以处理这么多个对首页的请求,
现在, 让我们开始教GCC, 让他编译出跑Wordpress4.1更快的PHP7来, 首先要求GCC 4.0以上的版本, 不过我建议大家使用GCC-4.8以上的版本(现在都GCC-5.1了).
第一步, 自然是下载PHP7的源代码了, 然后做./configure. 这些都没什么区别
接下来就是有区别的地方了, 我们要首先第一遍编译PHP7, 让它生成会产生profile数据的可执行文件:
$ make prof-gen
注意, 我们用到了prof-gen参数(这个是PHP7的Makefile特有的, 不要尝试在其他项目上也这么搞哈 :) )
然后, 让我们开始训练GCC:
$ sapi/cgi/php-cgi -T 100 /home/huixinchen/local/www/htdocs/wordpress/index.php >/dev/null
也就是让php-cgi跑100遍wordpress的首页, 从而生成一些在这个过程中的profile信息.
然后, 我们开始第二次编译PHP7.
$ make prof-clean $ make prof-use && make install
好的, 就这么简单, PGO编译完成了, 现在我们看看PGO编译以后的PHP7的性能:
$ ab -n10000 -c 100 :8000/wordpress/
This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, Licensed to The Apache Software Foundation, Benchmarking inf-dev-maybach.weibo.com (be patient) Completed 1000 requests Completed 2000 requests Completed 3000 requests Completed 4000 requests Completed 5000 requests Completed 6000 requests Completed 7000 requests Completed 8000 requests Completed 9000 requests Completed 10000 requests Finished 10000 requests Server Software: nginx/1.7.12 Server Hostname: inf-dev-maybach.weibo.com Server Port: 8000 Document Path: /wordpress/ Document Length: 9048 bytes Concurrency Level: 100 Time taken for tests: 8.391 seconds Complete requests: 10000 Failed requests: 0 Write errors: 0 Total transferred: 92860000 bytes HTML transferred: 90480000 bytes Requests per second: 1191.78 [#/sec] (mean) Time per request: 83.908 [ms] (mean) Time per request: 0.839 [ms] (mean, across all concurrent requests) Transfer rate: 10807.45 [Kbytes/sec] received
现在每秒钟可以处理1191.78个QPS了, 提升是~7%. 还不赖哈(咦, 你不是说10%么? 怎么成7%了? 呵呵, 正如我之前说过, 我们尝试分析PGO都做了些什么优化, 然后把一些通用的优化手工Apply到PHP7中. 所以也就是说, 那~3%的比较通用的优化已经包含到了PHP7里面了, 当然这个工作还在继续).
于是就这么简单, 大家可以用自己的产品的经典场景来训练GCC, 简单几步, 获得提升, 何乐而不为呢
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