PHP运行神器 - 用HHVM减小你一半的服务器

Hiphop是Facebook开发一款PHP二进制化的一个工具，最开始是由php转为C++，可是后来发现编译为c++的话，许多的时间会花费在编译代码上面，调试不方便，对于代码来讲也不是即见即所得。

因此hiphop经历了这么几个阶段：

HPHPC=>HPHPI=>HHVM

HPHPC是静态编译，也就是把php转为c++

HPHPI是一个过渡产品，相似php zend虚拟机，性能还不如zend虚拟机，可是能够运行查看效果；

HHVM是在HPHPI基础上，应用了JIT技术，性能已经接近了HPHPC,目前facebook打算慢慢抛弃HPHPC；

性能上HPHPC和HHVM比zend虚拟机+加速器要节约cpu在50%在300%间（官方提供），，我实际应用中，通常节约CPU在100%-300%间左右，流量越大越明显。

目前最新的官方2.1版本还存在着内存泄露的问题，对redis的支持只是提供了最基本的功能（咱们须要使用redis，因此对这一块比较在乎，其它的扩展能够去查看官方支持列表：https://github.com/facebook/h...）

源码安装过于麻烦，想尝鲜的建议yum，官方的源码安装文档：https://github.com/facebook/h...

参照官方的安装方式，用官方提供的yum源进行安装，在博主的支持下修复了libevent的内存泄露问题

Step1：设置好yum源

rpm -ivh
wget -O /etc/yum.repos.d/hop5.repo
yum clean all

Step2：安装好基础环境包。。。比较多。。。

rpm -ivh ftp://rpmfind.net/linux/epel/beta/6/x86_64/libmcrypt-2.5.8-9.el6.x86_64.rpm
rpm -ivh ftp://rpmfind.net/linux/epel/beta/6/x86_64/libmcrypt-devel-2.5.8-9.el6.x86_64.rpm
yum install git svn cpp make autoconf automake libtool patch memcached gcc-c++ cmake wget boost-devel mysql-devel pcre-devel gd-devel libxml2-devel expat-devel libicu-devel bzip2-devel oniguruma-devel openldap-devel readline-devel libc-client-devel libcap-devel binutils-devel pam-devel elfutils-libelf-devel tbb-devel libdwarf-devel dbus-cxx-devel libunwind-devel php-mssql libtool

若是准备编译安装的话，装如下的包就可以搭建好编译环境，若是不像编译安装则略过

yum install -y boost.x86_64 
boost-chrono.x86_64 
boost-date-time.x86_64 
boost-devel.x86_64 
boost-filesystem.x86_64 
boost-graph.x86_64 
boost-graph-mpich2.x86_64 
boost-graph-openmpi.x86_64 
boost-iostreams.x86_64 
boost-jam.x86_64 
boost-locale.x86_64 
boost-math.x86_64 
boost-mpich2.x86_64 
boost-mpich2-devel.x86_64 
boost-mpich2-python.x86_64 
boost-openmpi.x86_64 
boost-openmpi-devel.x86_64 
boost-openmpi-python.x86_64 
boost-program-options.x86_64 
boost-python.x86_64 
boost-random.x86_64 
boost-regex.x86_64 
boost-serialization.x86_64 
boost-signals.x86_64 
boost-static.x86_64 
boost-system.x86_64 
boost-test.x86_64 
boost-thread.x86_64 
boost-timer.x86_64 
boost-wave.x86_64 
cpp.x86_64 
curl.x86_64 
gcc.x86_64 
gcc-c++.x86_64 
gcc-gfortran.x86_64 
gcc-objc.x86_64 
gcc-objc++.x86_64 
gcc-plugin-devel.x86_64 
glog.x86_64 
glog-devel.x86_64 
gmp.x86_64 
gmp-devel.x86_64 
gmp-static.x86_64 
golang.x86_64 
libcurl.x86_64 
libcurl-devel.x86_64 
libdwarf.x86_64 
libdwarf-devel.x86_64 
libdwarf-static.x86_64 
libdwarf-tools.x86_64 
libevent.x86_64 
libevent-devel.x86_64 
libgcc.x86_64 
libgfortran.x86_64 
libgfortran-static.x86_64 
libgomp.x86_64 
libmemcached.x86_64 
libmemcached-devel.x86_64 
libmpc.x86_64 
libmpc-devel.x86_64 
libmudflap.x86_64 
libmudflap-devel.x86_64 
libmudflap-static.x86_64 
libobjc.x86_64 
libquadmath.x86_64 
libquadmath-devel.x86_64 
libquadmath-static.x86_64 
libstdc++.x86_64 
libstdc++-devel.x86_64 
libstdc++-static.x86_64 
libtool.x86_64 
libtool-ltdl.x86_64 
libtool-ltdl-devel.x86_64 
lxc.x86_64 
lxc-devel.x86_64 
lxc-doc.x86_64 
lxc-libs.x86_64 
lxc-templates.x86_64 
mpfr.x86_64 
mpfr-devel.x86_64 
nginx.x86_64 
tbb.x86_64 
tbb-devel.x86_64 
tbb-doc.x86_64

若是这里安装 golang 包报错能够选择不安装这个包

若是不是编译安装，只要执行

yum install hiphop-php

Step3：解决HHVM对于libevent的内存泄露问题

git下libevent和hhvm的源码包，之因此要hhvm的源码包，是要在libevent源码中打入hhvm提供的针对libevent的补丁，才能让libevent支持hhvm

git clone git://github.com/libevent/libevent.git
git clone git://github.com/facebook/hiphop-php.git
cd libevent/
git checkout release-1.4.14b-stable

打补丁

cat ../hiphop-php/hphp/third_party/libevent-1.4.14.fb-changes.diff | patch -p1

打完补丁后改修一下libevent的http.c文件，解决内存泄露的关键大概在2319行这里，在

if (req->evcon->state == EVCON_DISCONNECTED) {

下面，增长

req->userdone = 1;

Step4.编译安装libevent

./autogen.sh
./configure --prefix=/usr/ --libdir=/usr/lib64/ #注意路径不要出错，这里是覆盖了rpm安装的libeventmake && make install

ok...安装完毕

至此，运行php脚本直接执行hhvm script.php就好了

hhvm会把php先编译成c++的代码再去运行