当我使用iperf3执行UDP测量时，为什么在每个间隔发送不同数量的数据报？它是怎么知道的（如果我们正在谈论UDP）更改发送的数据，如果它不是常量的话。
那么从本质上讲，为什么客户端上会有变化，它如何计算报告的吞吐量？
$iperf3 -u -t 10 -c 192.168.1.2 -b 100M -i 1 --get-server-output
Connecting to host 192.168.1.2, port 5201
[ 5] local 192.168.1.1 port 39718 connected to 192.168.1.2 port 5201
[ ID] Interval Transfer Bitrate Total Datagrams
[ 5] 0.00-1.00 sec 4.51 MBytes 37.9 Mbits/sec 3268
[ 5] 1.00-2.00 sec 4.60 MBytes 38.6 Mbits/sec 3332
[ 5] 2.00-3.00 sec 4.25 MBytes 35.6 Mbits/sec 3076
[ 5] 3.00-4.00 sec 4.29 MBytes 36.0 Mbits/sec 3104
[ 5] 4.00-5.00 sec 4.64 MBytes 38.9 Mbits/sec 3360
[ 5] 5.00-6.00 sec 4.51 MBytes 37.8 Mbits/sec 3264
[ 5] 6.00-7.00 sec 4.57 MBytes 38.4 Mbits/sec 3312
[ 5] 7.00-8.00 sec 4.52 MBytes 37.9 Mbits/sec 3270
[ 5] 8.00-9.00 sec 4.48 MBytes 37.5 Mbits/sec 3241
[ 5] 9.00-10.00 sec 4.18 MBytes 35.0 Mbits/sec 3024
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.00 sec 44.5 MBytes 37.4 Mbits/sec 0.000 ms 0/32251 (0%) sender
[ 5] 0.00-10.29 sec 44.5 MBytes 36.3 Mbits/sec 8.382 ms 0/32251 (0%) receiver
Server output:
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.1.1, port 49134
[ 5] local 192.168.1.2 port 5201 connected to 192.168.1.1 port 39718
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-1.00 sec 4.27 MBytes 35.8 Mbits/sec 0.554 ms 0/3090 (0%)
[ 5] 1.00-2.00 sec 4.58 MBytes 38.4 Mbits/sec 0.448 ms 0/3320 (0%)
[ 5] 2.00-3.00 sec 4.27 MBytes 35.8 Mbits/sec 0.444 ms 0/3089 (0%)
[ 5] 3.00-4.00 sec 4.29 MBytes 36.0 Mbits/sec 0.410 ms 0/3110 (0%)
[ 5] 4.00-5.00 sec 4.61 MBytes 38.7 Mbits/sec 0.610 ms 0/3340 (0%)
[ 5] 5.00-6.00 sec 4.52 MBytes 37.9 Mbits/sec 0.775 ms 0/3272 (0%)
[ 5] 6.00-7.00 sec 4.57 MBytes 38.4 Mbits/sec 0.311 ms 0/3312 (0%)
[ 5] 7.00-8.00 sec 4.52 MBytes 37.9 Mbits/sec 0.560 ms 0/3275 (0%)
[ 5] 8.00-9.00 sec 4.49 MBytes 37.6 Mbits/sec 0.527 ms 0/3248 (0%)
[ 5] 9.00-10.00 sec 4.15 MBytes 34.8 Mbits/sec 0.611 ms 0/3002 (0%)
[ 5] 10.00-10.29 sec 273 KBytes 7.59 Mbits/sec 8.382 ms 0/193 (0%)
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.29 sec 44.5 MBytes 36.3 Mbits/sec 8.382 ms 0/32251 (0%) receiver