6月25號php 8 alpha 1發(fā)布，7月9號 php 8 alpha 2發(fā)布，一般alpha 2是一個稍微能用的版本，所以周末測評了一下php8 JIT到底是個什么？

先看一下結(jié)果：

JIT不開啟的情況下

php -d opcache.jit_buffer_size=0 Zend/bench.php simple             0.025simplecall         0.012simpleucall        0.012simpleudcall       0.012mandel             0.135mandel2            0.211ackermann(7)       0.082ary(50000)         0.012ary2(50000)        0.010ary3(2000)         0.186fibo(30)           0.283hash1(50000)       0.039hash2(500)         0.041heapsort(20000)    0.089matrix(20)         0.110nestedloop(12)     0.096sieve(30)          0.045strcat(200000)     0.019------------------------ Total              1.419

JIT開啟的情況下：

php -d -d opcache.jit_buffer_size=64M -d opcache.jit=1205 Zend/bench.php simple             0.001simplecall         0.000simpleucall        0.000simpleudcall       0.000mandel             0.005mandel2            0.006ackermann(7)       0.010ary(50000)         0.005ary2(50000)        0.004ary3(2000)         0.011fibo(30)           0.027hash1(50000)       0.027hash2(500)         0.018heapsort(20000)    0.011matrix(20)         0.011nestedloop(12)     0.006sieve(30)          0.004strcat(200000)     0.009------------------------ Total              0.155

還有不打開Opcache的情況下：

php Zend/bench.php simple             0.051simplecall         0.017simpleucall        0.083simpleudcall       0.089mandel             0.506mandel2            0.409ackermann(7)       0.095ary(50000)         0.012ary2(50000)        0.010ary3(2000)         0.187fibo(30)           0.367hash1(50000)       0.040hash2(500)         0.041heapsort(20000)    0.097matrix(20)         0.122nestedloop(12)     0.093sieve(30)          0.063strcat(200000)     0.018------------------------ Total              2.299

不開啟Opcache : 2.299s 開啟Opcache不開啟JIT情況下：1.419s 開啟Opcache且開啟JIT情況下：0.155s

開啟JIT情況下是不開啟JIT情況下的接近9.15倍，多次測試這個值穩(wěn)定在8倍到10倍之間。

MPF表現(xiàn)如何？

為了接近我們的業(yè)務，所以在mpf框架下進行測試

環(huán)境

aliyun centos 6.9

php7.test.com php-fpm一個進程 php8.test.com php-fpm一個進程

Mpf兩個接口

/v1/hello/wzh/index1

public function index1() {    $this->output('123'); }

/v1/hello/wzh/index2

public function index2() {     $a = 0;    for ($i = 0; $i < 1000000; $i++)         $a++;    $this->output($a); }

我們壓測一下

php7 計算少情況

wrk -c36 -d 5s -t12 https://php7.test.com/v1/hello/wzh/index1 Running 5s test @ https://php7.test.com/v1/hello/wzh/index1   12 threads and 36 connections   Thread Stats   Avg      Stdev     Max   +/- Stdev     Latency   432.97ms   76.00ms 527.38ms   92.17%     Req/Sec     8.38      5.36    20.00     63.85%   396 requests in 5.09s, 121.43KB readRequests/sec:     77.78 Transfer/sec:     23.85KB

php7 計算多情況

wrk -c36 -d 5s -t12 https://php7.test.com/v1/hello/wzh/index2 Running 5s test @ https://php7.test.com/v1/hello/wzh/index2   12 threads and 36 connections   Thread Stats   Avg      Stdev     Max   +/- Stdev     Latency     1.02s   569.99ms   1.96s    57.14%     Req/Sec     3.18      3.43    10.00     80.88%   70 requests in 5.03s, 21.60KB read   Socket errors: connect 0, read 0, write 0, timeout 42 Requests/sec:     13.91 Transfer/sec:      4.29KB

php8 JIT開啟計算少情況

wrk -c36 -d 5s -t12 https://php8.test.com/v1/hello/wzh/index1 Running 5s test @ https://php8.test.com/v1/hello/wzh/index1   12 threads and 36 connections   Thread Stats   Avg      Stdev     Max   +/- Stdev     Latency    34.48ms    4.34ms  95.45ms   87.87%     Req/Sec    84.61     13.36   121.00     85.28%   5083 requests in 5.03s, 1.67MB readRequests/sec:   1010.55 Transfer/sec:    340.43KB

php8 JIT開啟計算多情況

wrk -c36 -d 5s -t12 https://php8.test.com/v1/hello/wzh/index2 Running 5s test @ https://php8.test.com/v1/hello/wzh/index2   12 threads and 36 connections   Thread Stats   Avg      Stdev     Max   +/- Stdev     Latency    97.84ms    4.97ms 159.50ms   92.12%     Req/Sec    30.27      4.42    50.00     86.50%   1814 requests in 5.07s, 614.71KB readRequests/sec:    357.76 Transfer/sec:    121.23KB

php8 JIT關(guān)閉計算少情況

wrk -c36 -d 5s -t12 https://php8.test.com/v1/hello/wzh/index1 Running 5s test @ https://php8.test.com/v1/hello/wzh/index1   12 threads and 36 connections   Thread Stats   Avg      Stdev     Max   +/- Stdev     Latency    38.10ms    6.47ms 239.60ms   94.01%     Req/Sec    77.50     12.76   110.00     89.63%   4622 requests in 5.04s, 1.52MB readRequests/sec:    916.22 Transfer/sec:    308.65KB

php8 JIT關(guān)閉計算多情況

wrk -c36 -d 5s -t12 https://php8.test.com/v1/hello/wzh/index2 Running 5s test @ https://php8.test.com/v1/hello/wzh/index2   12 threads and 36 connections   Thread Stats   Avg      Stdev     Max   +/- Stdev     Latency   766.16ms  181.30ms 887.08ms   88.37%     Req/Sec     6.25      5.36    20.00     91.36%   215 requests in 5.09s, 72.86KB readRequests/sec:     42.22 Transfer/sec:     14.31KB

[image:BA1A37D8-760E-4637-901B-3E3521F969E7-4107-0000191504DD1B2E/86D37899-3B46-4BDA-B396-E5C8DD51068E.png]

發(fā)現(xiàn)計算少情況下php8JIT是php7性能的13倍，而且計算越多優(yōu)化越明顯，計算多情況下php8JIT是php7性能的25.7倍。

但是有一個問題我覺得很神奇php8無JIT計算少的情況居然也優(yōu)化了很多，我以為是測試方向的問題，但是經(jīng)過多次論證，這個數(shù)據(jù)是準確的，有時間想找一下這里的優(yōu)化點是什么。

編譯過程

吐槽：php手動編譯越來越麻煩了，編譯了2個小時才編譯完，踩了N個坑，為了讓大家多寫幾個需求，把坑分享出來

環(huán)境

aliyun centos 6.9，咱們公司一般都是這個版本。

php源碼編譯

wget https://downloads.php.net/~carusogabriel/php-8.0.0alpha2.tar.gz  tar -zxf php-8.0.0alpha2.tar.gzcd php-8.0.0alpha2  ./configure --prefix=/yourdir/php8 --with-config-file-path=/yourdir/php8/etc --enable-mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --enable-fpm --enable-static --enable-sockets --with-zip --enable-calendar --enable-bcmath --enable-mbstring --with-zlib --with-iconv=/usr/local/libiconv --enable-gd --enable-mbstring --with-freetype --with-mysql-sock=/tmp/mysql.sock --disable-ipv6 --enable-debug --with-openssl --enable-opcache復制代碼

這里一般都是makefile生成失敗的，后面有生成失敗的例子，生成成功后

make -j 8  make install  cp php.ini-production /yourdir/php8/etc/php.ini

配置php.ini

記住一定要把opcache.ini舊的配置也寫上，JIT說到底還是對Opcache的優(yōu)化。

zend_extension=opcache.so opcache.enable=1  ; 命令行測試的話這里一定要打開 opcache.enable_cli=1 opcache.memory_consumption=512 opcache.interned_strings_buffer=8 opcache.max_accelerated_files=10000 opcache.validate_timestamps=1 opcache.revalidate_freq=300 opcache.fast_shutdown=1 opcache.enable_file_override = 1 opcache.blacklist_filename = /etc/php.d/opcache.blacklist  ; 這里就是新的jit的配置 opcache.jit=1205 opcache.jit_buffer_size=64M

configure失敗解決方法

這里解決./configure 失敗的一些問題

問題一

No package 'sqlite3' found

解決辦法

wget https://www.sqlite.org/2020/sqlite-autoconf-3320300.tar.gz  tar -zxf sqlite-autoconf-3320300.tar.gzcd sqlite-autoconf-3320300  ./configure --prefix=/usr/local/lib/sqlite-3.32.0  make CFLAGS="-g -O2 -DSQLITE_ENABLE_COLUMN_METADATA"make installexport PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/lib/sqlite-3.32.0/lib/pkgconfig"復制代碼

注意

直接這樣是不行的，yum倉庫里的版本太低。

yum install sqlite-devel

問題二

configure: error: Please reinstall the iconv library.

解決辦法

wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz  tar -zxf libiconv-1.14.tar.gzcd libiconv-1.14  ./configure   make   make install

問題三

No package 'oniguruma' found

同樣yum也是不行的，版本太低。

yum install oniguruma-devel

解決辦法

wget https://github.com/kkos/oniguruma/archive/v6.9.5_rev1.tar.gz  tar -zxf v6.9.5_rev1.tar.gzcd oniguruma-6.9.5_rev1/   autoreconf -vfi  ./configure --prefix=/usr/local/lib/oniguruma-6.9.5  make   make installexport PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/lib/oniguruma-6.9.5/lib/pkgconfig"

問題四

No package 'libzip' found

解決辦法

wget https://libzip.org/download/libzip-1.7.2.tar.gz  tar -zxf libzip-1.7.2.tar.gzcd libzip-1.7.2  cmake3 -DCMAKE_INSTALL_PREFIX=/usr/local/lib/libzip-1.7.2  make   make installexport PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/lib/libzip-1.7.2/lib/pkgconfig"復制代碼

Enjoy php 8 & JIT !