flood 的测试次数是如何决定？

每个 url 的测试次数 = （farmer 的数量） X （运行测试）

<farmer>
    <name>Joe</name>
    <!-- We run the Joe farmer 10 times
         Note that we have the "time" option which indicates for how many
         seconds a farmer should run. The "time" and "count" elements are
         exclusive. -->
    <count>5count>
    <!-- Farmer Joe uses this profile -->
    <useprofile>Example Profile</useprofile>
  </farmer>

  <!-- A farm contains a bunch of farmers - each farmer is an independent
       worker (i.e. a thread or child process). -->
  <farm>
    <!-- We call our farm "Bingo" - note that the farm must be called Bingo
         in the current implementation. -->
    <name>Bingo</name>
    <!-- We will start 5 farmers named Joe. We will start 2 farmers every 5
         seconds. -->
    <usefarmer count="5" startcount="2" startdelay="5">Joeusefarmer>
  </farm>

所以每个 URL 的测试次数为 5 X 10 = 50 次，见下面的 hits 字段

[root@dhcp-client examples]# ./analyze-relative /tmp/out
Slowest pages on average (worst 5):
   Average times (sec)
connect write read close hits URL
0.0003 0.0004 0.0183 0.0183 50 http://172.17.64.34/cgi-bin/my.cgi
0.0004 0.0004 0.0041 0.0041 50 http://172.17.64.34
0.0002 0.0002 0.0019 0.0020 50 http://172.17.64.39/full-%E5%91%BD%E4%BB%A4%E5%88%97%E8%A1%A8-rhel.txt
Requests: 150 Time: 0.24 Req/Sec: 635.03
[root@dhcp-client examples]#

也可以通过 time 属性来控制，但它和 count 属性是互斥的，但在实际测试中发现，即使同时指定

了 50> 和 30 也不会报错，而且会被 所覆盖

<farmer>     <name>Joe</name>     <!-- We run the Joe farmer 10 times          Note that we have the "time" option which indicates for how many          seconds a farmer should run. The "time" and "count" elements are          exclusive. -->     <count>5</count>     <time>30</time>     <!-- Farmer Joe uses this profile -->     <useprofile>Example Profile</useprofile>   </farmer>

可以看到运行了40秒（虽然上面指定了30秒），但不是指定的 5 x 5 = 25 次，而是 3001 次

[root@dhcp-client examples]# date +%s;/usr/bin/flood ./mail.bob.com.xml > /tmp/out;date +%s
1205227284
1205227324
[root@dhcp-client examples]# ./analyze-relative /tmp/out
Slowest pages on average (worst 5):
   Average times (sec)
connect write read close hits URL
0.0004 0.0005 0.0337 0.0338 3001 http://172.17.64.34/cgi-bin/my.cgi
0.0004 0.0004 0.0137 0.0137 3001 http://172.17.64.34
0.0002 0.0002 0.0022 0.0022 3001 http://172.17.64.39/full-%E5%91%BD%E4%BB%A4%E5%88%97%E8%A1%A8-rhel.txt
Requests: 9003 Time: 29.85 Req/Sec: 301.60
[root@dhcp-client examples]#

但如果是只有 时，运行的时间就是准确的。可以看到的确是 30 秒

[root@dhcp-client examples]# date +%s;/usr/bin/flood ./mail.bob.com.xml > /tmp/out;date +%s
1205227775
1205227815
[root@dhcp-client examples]#