我正在脚本的光学高速链路上运行iperf测试，该脚本运行iperf测试50秒，每1秒报告一次，测试完成并每1分钟重新开始。通常情况下一切正常，但是有时候连接正常时，测试的运行时间会比我设置的50秒参数长得多。我认为是因为如果由于连接问题导致数据包丢失，客户端就不会从服务器获得收据，并且客户端会尝试重新传输数据包
这是我在客户端上用于运行Iperf测试的内容...
iperf -c 10.150.91.176 -i 1 -t 50 -p 5203
通常我的结果看起来像这样（运行50秒）...
------------------------------------------------------------
Client connecting to 10.150.91.176, TCP port 5203
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.150.91.175 port 37832 connected with 10.150.91.176 port 5203
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 1.05 GBytes 9.04 Gbits/sec
[ 3] 1.0- 2.0 sec 1.08 GBytes 9.26 Gbits/sec
[ 3] 2.0- 3.0 sec 1.03 GBytes 8.83 Gbits/sec
[ 3] 3.0- 4.0 sec 1015 MBytes 8.51 Gbits/sec
[ 3] 4.0- 5.0 sec 1.08 GBytes 9.25 Gbits/sec
[ 3] 5.0- 6.0 sec 1.09 GBytes 9.36 Gbits/sec
[ 3] 6.0- 7.0 sec 1.09 GBytes 9.36 Gbits/sec
[ 3] 7.0- 8.0 sec 1.09 GBytes 9.39 Gbits/sec
[ 3] 8.0- 9.0 sec 1.05 GBytes 9.04 Gbits/sec
[ 3] 9.0-10.0 sec 1.03 GBytes 8.84 Gbits/sec
[ 3] 10.0-11.0 sec 1.08 GBytes 9.27 Gbits/sec
[ 3] 11.0-12.0 sec 1.09 GBytes 9.40 Gbits/sec
[ 3] 12.0-13.0 sec 1.09 GBytes 9.36 Gbits/sec
[ 3] 13.0-14.0 sec 1.10 GBytes 9.41 Gbits/sec
[ 3] 14.0-15.0 sec 1.01 GBytes 8.69 Gbits/sec
[ 3] 15.0-16.0 sec 1.06 GBytes 9.14 Gbits/sec
[ 3] 16.0-17.0 sec 1.01 GBytes 8.67 Gbits/sec
[ 3] 17.0-18.0 sec 1001 MBytes 8.39 Gbits/sec
[ 3] 18.0-19.0 sec 1.04 GBytes 8.90 Gbits/sec
[ 3] 19.0-20.0 sec 1.08 GBytes 9.32 Gbits/sec
[ 3] 20.0-21.0 sec 1.06 GBytes 9.06 Gbits/sec
[ 3] 21.0-22.0 sec 1014 MBytes 8.51 Gbits/sec
[ 3] 22.0-23.0 sec 1.01 GBytes 8.67 Gbits/sec
[ 3] 23.0-24.0 sec 1.08 GBytes 9.30 Gbits/sec
[ 3] 24.0-25.0 sec 1.07 GBytes 9.22 Gbits/sec
[ 3] 25.0-26.0 sec 1.04 GBytes 8.91 Gbits/sec
[ 3] 26.0-27.0 sec 1.09 GBytes 9.36 Gbits/sec
[ 3] 27.0-28.0 sec 1.07 GBytes 9.21 Gbits/sec
[ 3] 28.0-29.0 sec 1.04 GBytes 8.92 Gbits/sec
[ 3] 29.0-30.0 sec 1.06 GBytes 9.14 Gbits/sec
[ 3] 30.0-31.0 sec 1.09 GBytes 9.39 Gbits/sec
[ 3] 31.0-32.0 sec 1.09 GBytes 9.36 Gbits/sec
[ 3] 32.0-33.0 sec 1.09 GBytes 9.39 Gbits/sec
[ 3] 33.0-34.0 sec 1.08 GBytes 9.30 Gbits/sec
[ 3] 34.0-35.0 sec 1.07 GBytes 9.21 Gbits/sec
[ 3] 35.0-36.0 sec 1.07 GBytes 9.19 Gbits/sec
[ 3] 36.0-37.0 sec 1.08 GBytes 9.27 Gbits/sec
[ 3] 37.0-38.0 sec 1.05 GBytes 9.00 Gbits/sec
[ 3] 38.0-39.0 sec 1.04 GBytes 8.90 Gbits/sec
[ 3] 39.0-40.0 sec 1.09 GBytes 9.40 Gbits/sec
[ 3] 40.0-41.0 sec 1.06 GBytes 9.12 Gbits/sec
[ 3] 41.0-42.0 sec 1.00 GBytes 8.60 Gbits/sec
[ 3] 42.0-43.0 sec 1.08 GBytes 9.29 Gbits/sec
[ 3] 43.0-44.0 sec 1.08 GBytes 9.24 Gbits/sec
[ 3] 44.0-45.0 sec 1.05 GBytes 9.03 Gbits/sec
[ 3] 45.0-46.0 sec 1.04 GBytes 8.97 Gbits/sec
[ 3] 46.0-47.0 sec 1.08 GBytes 9.28 Gbits/sec
[ 3] 47.0-48.0 sec 1.07 GBytes 9.16 Gbits/sec
[ 3] 48.0-49.0 sec 1.09 GBytes 9.34 Gbits/sec
[ 3] 49.0-50.0 sec 1.08 GBytes 9.28 Gbits/sec
[ 3] 0.0-50.0 sec 53.0 GBytes 9.11 Gbits/sec
但是偶尔看起来好像遇到错误，我得到这样的信息（运行79秒）...
------------------------------------------------------------
Client connecting to 10.150.91.176, TCP port 5203
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.150.91.175 port 57184 connected with 10.150.91.176 port 5203
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 26.5 MBytes 222 Mbits/sec
[ 3] 1.0- 2.0 sec 29.1 MBytes 244 Mbits/sec
[ 3] 2.0- 3.0 sec 23.9 MBytes 200 Mbits/sec
[ 3] 3.0- 4.0 sec 26.0 MBytes 218 Mbits/sec
[ 3] 4.0- 5.0 sec 1.38 MBytes 11.5 Mbits/sec
[ 3] 5.0- 6.0 sec 13.0 MBytes 109 Mbits/sec
[ 3] 6.0- 7.0 sec 15.0 MBytes 126 Mbits/sec
[ 3] 7.0- 8.0 sec 5.62 MBytes 47.2 Mbits/sec
[ 3] 8.0- 9.0 sec 1.00 MBytes 8.39 Mbits/sec
[ 3] 9.0-10.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 10.0-11.0 sec 13.2 MBytes 111 Mbits/sec
[ 3] 11.0-12.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 12.0-13.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 13.0-14.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 14.0-15.0 sec 22.5 MBytes 189 Mbits/sec
[ 3] 15.0-16.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 16.0-17.0 sec 20.0 MBytes 168 Mbits/sec
[ 3] 17.0-18.0 sec 14.4 MBytes 121 Mbits/sec
[ 3] 18.0-19.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 19.0-20.0 sec 25.6 MBytes 215 Mbits/sec
[ 3] 20.0-21.0 sec 23.2 MBytes 195 Mbits/sec
[ 3] 25.0-26.0 sec 20.0 MBytes 168 Mbits/sec
[ 3] 26.0-27.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 27.0-28.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 28.0-29.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 29.0-30.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 30.0-31.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 31.0-32.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 32.0-33.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 33.0-34.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 34.0-35.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 35.0-36.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 36.0-37.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 37.0-38.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 38.0-39.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 39.0-40.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 40.0-41.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 41.0-42.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 42.0-43.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 43.0-44.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 44.0-45.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 45.0-46.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 46.0-47.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 47.0-48.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 48.0-49.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 49.0-50.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 50.0-51.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 51.0-52.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 52.0-53.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 53.0-54.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 54.0-55.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 55.0-56.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 56.0-57.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 57.0-58.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 58.0-59.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 59.0-60.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 60.0-61.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 61.0-62.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 62.0-63.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 63.0-64.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 64.0-65.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 65.0-66.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 66.0-67.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 67.0-68.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 68.0-69.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 69.0-70.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 70.0-71.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 71.0-72.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 72.0-73.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 73.0-74.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 74.0-75.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 75.0-76.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 76.0-77.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 77.0-78.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 78.0-79.0 sec 0.00 Bytes 0.00 bits/sec
[ 3] 0.0-79.7 sec 142 MBytes 15.0 Mbits/sec
有什么方法可以设置它，使其仅在设置的50秒时间间隔内运行？还是使用UDP iperf测试更好地做到这一点？如果我每次只能进行50秒钟的测试，那么对我的数据/统计数据会更好。谢谢