编译ab压力测试并发(Ubuntu)

2017-09-08

Abstract

用深度学习框架caffe做的project，需要对其进行并发数请求数的压力测试，找到了apachebench(ab)简单的压力测试工具，但在Ubuntu下通过apt-get安装的ab，在处理请求数高于200,300左右的时候就会报错终止apr_socket_recv: Connection reset by peer，查阅资料显示需要对ab进行重新修改并编译后方可破除这个问题（无论是如何安装的，都要从头开始重新修改编译安装）。

1.下载所需要的源码

apr和apr-util下载：http://apr.apache.org/download.cgi

ab-standalone源码下载:https://code.google.com/p/apachebench-standalone/downloads/list

2.编译安装

分别解压三个压缩包：

ab-standalone-0.1.tar.bz2 
apr-1.x.x.tar.gz  
apr-util-1.x.x.tar.gz

a.编译apr

$ cd apr
$ ./configure  
$ make  
$ sudo make install

b.编译apr-util

$ cd apr-util 
$ ./configure --with-apr=/usr/local/apr  
$ make  
$ sudo make install

c.编译ab

修改ab-standalone/ab.c文件

$ cd ab/ab-standalone  
$ vim ab.c

到1380行修改成如下:

/* catch legitimate fatal apr_socket_recv errors */  
else if (status != APR_SUCCESS) {  
    err_recv++;  
    if (recverrok) {  
        bad++;  
        close_connection(c);  
        if (verbosity >= 1) {  
            char buf[120];  
            fprintf(stderr,"%s: %s (%d)\n", "apr_socket_recv", apr_strerror(status, buf, sizeof buf), status);  
        }  
        return;  
    } else {  
        //apr_err("apr_socket_recv", status);   // begin 
        bad++;  
        close_connection(c);  
        return;      // end 
    }  
}

然后在编译之前将apr-util/include/下的apr_base64.h和apu.h拷贝到ab-standalone文件夹内，否则找不到头文件

开始编译ab

$ make apr-skeleton
$ sudo make ab
$ sudo cp ab apr-skeleton /usr/local/bin/

3.注意

连接库文件问题：

终端中安装： libapr1，否则会出错找不到apr-1：sudo apt-get install libapr1

或者从编译后的usr/local/apr/lib下面将几个文件拷贝到/usr/lib/x86_64-linux-gnu下做链接：

sudo cp /usr/local/apr/lib/libaprutil-1.a /usr/lib/x86_64-linux-gnu/
sudo cp /usr/local/apr/lib/liaprutil-1.so /usr/lib/x86_64-linux-gnu/
sudo cp /usr/local/apr/lib/libaprutil-1.so.0.6.0 /usr/lib/x86_64-linux-gnu/
sudo cp /usr/local/apr/lib/libaprutil-1.la /usr/lib/x86_64-linux-gnu/
cd /usr/lib/x86_64-linux-gnu/
sudo ln -s libaprutil-1.so.0.6.0 libaprutil-1.so.0
sudo ldconfig

同理，不选择apt-get安装，而如此设置libapr1.so.0即可。

4.测试

查看版本：

$ ab -V
This is ApacheBench, Version 2.3 <$Revision$>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

测试并发数：

ab -n 500 -c 500 127.0.0.1  # -n请求数，-c并发数，-n>=-c

This is ApacheBench, Version 2.3 <$Revision$>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Finished 500 requests


Server Software:        TornadoServer/4.5.2
Server Hostname:        127.0.0.1
Server Port:            1000

Document Path:          /
Document Length:        221727 bytes

Concurrency Level:      500
Time taken for tests:   215.661 seconds
Complete requests:      500
Failed requests:        1023
   (Connect: 0, Receive: 341, Length: 341, Exceptions: 341)
Write errors:           0
Total transferred:      35272401 bytes
HTML transferred:       35254593 bytes
Requests per second:    2.32 [#/sec] (mean)
Time per request:       215661.110 [ms] (mean)
Time per request:       431.322 [ms] (mean, across all concurrent requests)
Transfer rate:          159.72 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0  355 3586.5      0   63141
Processing:  1557 119576 33974.7 127335  182963
Waiting:        0 33466 58718.9      0  182963
Total:       1566 119931 34207.2 127335  210234

Percentage of the requests served within a certain time (ms)
  50%  127335
  66%  127336
  75%  127337
  80%  127337
  90%  151213
  95%  175948
  98%  176152
  99%  177742
 100%  210234 (longest request)

参考

http://shenwang.blog.ustc.edu.cn/%E5%AE%89%E8%A3%85abapachebench-standalone/
http://blog.csdn.net/kimsung/article/details/9422991
https://code.google.com/p/apachebench-standalone/wiki/HowToBuild