Long time no pkt running with limit-rate

[Lei B Bao]

Hi Wget team.

Now we’re using the wget 1.21 version to download a 700K file with a fixed 
rate-limit 10K, and we want the pkts can be kept running during ~70s, but we 
found there are about 60s+ no pkt running:


root@3c578c2b5c87:/# wget -V

GNU Wget 1.21 built on linux-gnu.



root@3c578c2b5c87:/# wget 
http://192.168.200.30:80/wget_traffic_id_2_700KB<http://192.168.200.30/wget_traffic_id_2_700KB>
 -O /dev/null --limit-rate=10K





....

02:29:28.007124 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [.], ack 
698203, win 1391, options [nop,nop,TS val 3141532161 ecr 3882564233], length 0

02:29:28.007126 IP 192.168.200.30.80 > 192.168.200.200.44544: Flags [P.], seq 
698203:700259, ack 151, win 28, options [nop,nop,TS val 3882564233 ecr 
3141532160], length 2056: HTTP

02:29:28.007131 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [.], ack 
700259, win 1408, options [nop,nop,TS val 3141532161 ecr 3882564233], length 0



<<<<< 60s+ no pkts running





02:30:36.358950 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141600513 ecr 3882564233], 
length 0

02:30:36.568323 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141600723 ecr 3882564233], 
length 0

02:30:36.776340 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141600931 ecr 3882564233], 
length 0

02:30:37.184305 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141601339 ecr 3882564233], 
length 0

02:30:38.032310 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141602187 ecr 3882564233], 
length 0

02:30:39.696306 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141603851 ecr 3882564233], 
length 0

02:30:42.960334 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141607115 ecr 3882564233], 
length 0

02:30:49.808344 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141613963 ecr 3882564233], 
length 0

^@02:31:03.120308<mailto:%5e@02:31:03.120308> IP 192.168.200.200.44544 > 
192.168.200.30.80: Flags [F.], seq 151, ack 700259, win 1408, options 
[nop,nop,TS val 3141627275 ecr 3882564233], length 0

02:31:29.232320 IP 192.168.200.200.44544 > 192.168.200.30.80: Flags [F.], seq 
151, ack 700259, win 1408, options [nop,nop,TS val 3141653387 ecr 3882564233], 
length 0

While we also tested with old version 1.20.1, it seems good, but also about 5 s 
no pkts running:


root@ebe3ce58547c:/# wget -V

GNU Wget 1.20.1 built on linux-gnu.



root@ebe3ce58547c:/# wget 
http://192.168.200.30:80/wget_traffic_id_2_700KB<http://192.168.200.30/wget_traffic_id_2_700KB>
 -O /dev/null --limit-rate=10K



02:42:00.187604 IP 192.168.200.200.46556 > 192.168.200.30.80: Flags [.], ack 
683507, win 195, options [nop,nop,TS val 265728065 ecr 265435757], length 0

02:42:00.187631 IP 192.168.200.30.80 > 192.168.200.200.46556: Flags [P.], seq 
683507:692455, ack 165, win 489, options [nop,nop,TS val 265435757 ecr 
265728065], length 8948: HTTP

02:42:00.187633 IP 192.168.200.30.80 > 192.168.200.200.46556: Flags [P.], seq 
692455:698203, ack 165, win 489, options [nop,nop,TS val 265435757 ecr 
265728065], length 5748: HTTP

02:42:00.187633 IP 192.168.200.30.80 > 192.168.200.200.46556: Flags [P.], seq 
698203:700259, ack 165, win 489, options [nop,nop,TS val 265435757 ecr 
265728065], length 2056: HTTP

02:42:00.231702 IP 192.168.200.200.46556 > 192.168.200.30.80: Flags [.], ack 
700259, win 94, options [nop,nop,TS val 265728110 ecr 265435757], length 0



<<< ~5s no pkts running.



02:42:05.787250 IP 192.168.200.200.46556 > 192.168.200.30.80: Flags [.], ack 
700259, win 411, options [nop,nop,TS val 265733665 ecr 265435757], length 0

02:42:07.746996 IP 192.168.200.200.46556 > 192.168.200.30.80: Flags [F.], seq 
165, ack 700259, win 443, options [nop,nop,TS val 265735625 ecr 265435757], 
length 0

02:42:07.747292 IP 192.168.200.30.80 > 192.168.200.200.46556: Flags [F.], seq 
700259, ack 166, win 489, options [nop,nop,TS val 265443317 ecr 265735625], 
length 0

02:42:07.747302 IP 192.168.200.200.46556 > 192.168.200.30.80: Flags [.], ack 
700260, win 443, options [nop,nop,TS val 265735625 ecr 265443317], length 0


So, do you think does it work as expected? And any work around way?

Thanks,
Bali