Tsung压测时总连接数 = 本机可用IP地址数量×本机可用端口的数量×远程服务器可访问IP地址数量×远程服务器可访问端口数量。
yum install -y gcc gcc-c++ make libX11 xauth
yum install -y cairo-devel pango-devel freetype-devel gd-devel
yum install -y ncurses-devel openssl-devel unixODBC-devel wxWidgets-devel wxGTK3-docs mesa-libGL-devel
wget http://erlang.org/download/otp_src_20.0.tar.gz
wget https://www.cpan.org/modules/by-module/Template/Template-Toolkit-2.26.tar.gz
wget http://tsung.erlang-projects.org/dist/tsung-1.7.0.tar.gz
tar zxf otp_src_20.0.tar.gz 
cd otp_src_20.0
./configure --prefix=/usr/local/erlang --without-javac
make -j 2
make install
tar zxf gnuplot-4.4.2.tar.gz
cd gnuplot-4.4.2
./configure
make -j 2
make install
export PATH=$PATH:/usr/local/erlang/bin/
tar zxf tsung-1.7.0.tar.gz
cd tsung-1.7.0
./configure --prefix=/usr/local/tsung 

<?xml version="1.0"?>
<!DOCTYPE tsung SYSTEM "/usr/local/tsung/share/tsung/tsung-1.0.dtd">
<tsung loglevel="debug" version="1.0">
    <clients>
        <client host="bogon" maxusers="100000" cpu="1">
      <ip value="192.168.1.152"></ip>
      <ip value="192.168.1.153"></ip>
      <ip value="192.168.1.154"></ip>
      <ip value="192.168.1.155"></ip>
    </client>
    </clients>
    <servers>
        <server host="192.168.1.110" port="61613" type="tcp" />
    </servers>
    <load>
        <user session="mqtt_subscriber" start_time="30" unit="second"></user>
        <arrivalphase phase="1" duration="60" unit="second">
            <users maxnumber="100000" arrivalrate="5000" unit="second"/>
        </arrivalphase>
    </load>
    <sessions>
        <session name="mqtt_publisher" probability="100" type="ts_mqtt">
            <request>
                <mqtt type="connect" clean_start="true" keepalive="10" username="admin" password="password" will_topic="phihome/test" will_qos="0" will_msg="will_msg" will_retain="false"></mqtt>
            </request>
            <for from="1" to="10" incr="1" var="loops">
                <request subst="true">
                    <mqtt type="publish" topic="phihome/test" qos="1" retained="true">test_message</mqtt>
                </request>
            </for>
            <request>
                <mqtt type="disconnect"></mqtt>
            </request>
        </session>
        <session name="mqtt_subscriber" probability="0" type="ts_mqtt">
            <request>
                <mqtt type="connect" clean_start="true" keepalive="10"></mqtt>
            </request>
            <request subst="true">
                <mqtt type="subscribe" topic="test_topic" qos="1"></mqtt>
            </request>
            <request>
                <!-- wait for 60s -->
                <mqtt type="waitForMessages" timeout="60"></mqtt>
            </request>
            <request subst="true">
                <mqtt type="unsubscribe" topic="test_topic"></mqtt>
            </request>
            <request>
                <mqtt type="disconnect"></mqtt>
            </request>
        </session>
    </sessions>
</tsung>