OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity Critical
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Steven Johnson - 29.04.2021

FS#3762 - WAN performance regression on MT7621 21.02-rc1 vs 19.07.7

There is an issue with Wan throughput on the MT7621 and OpenWrt 21.02-rc1 vs 19.07.7

The test setup is an Iperf3 server running locally on the wan side of the router (A NeWifi-D2) and running Iperf3 as client on the router. This is stock firmware with no changes to the network settings from stock.

19.07.7 - TX = 531Mbps RX = 629Mbps
21.02-Rc1 - TX = 792Mbps Rx = 523Mbps

So while it appears TX has improved, RX is suffering and it is noticeable with non synthetic transfers.

Noticably the RX test on 21.02-RC1 is reporting rampant Retransmits by the Iperf server. These are not present in 19.07.7 in either direction, OR in 21.02-RC1 when the router is sending, only when its receiving. I also ran mpstat with an interval of 3 seconds to see processor load during the test. In the result sets below, iperf3 test was started during interval 3.

The command line on the router is
TX =

iperf3 -c <server ip> -P 2

RX =

iperf3 -c <server ip> -P 2 -R

19.07.7 - TX

iperf3 -c 192.168.69.102 -P 2
Connecting to host 192.168.69.102, port 5201
[  5] local 192.168.69.127 port 50742 connected to 192.168.69.102 port 5201
[  7] local 192.168.69.127 port 50744 connected to 192.168.69.102 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.04   sec  28.7 MBytes   231 Mbits/sec    0    130 KBytes       
[  7]   0.00-1.04   sec  28.7 MBytes   231 Mbits/sec    0    123 KBytes       
[SUM]   0.00-1.04   sec  57.3 MBytes   462 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.04-2.00   sec  28.8 MBytes   251 Mbits/sec    0    130 KBytes       
[  7]   1.04-2.00   sec  28.8 MBytes   251 Mbits/sec    0    130 KBytes       
[SUM]   1.04-2.00   sec  57.5 MBytes   502 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.00-3.01   sec  30.0 MBytes   251 Mbits/sec    0    130 KBytes       
[  7]   2.00-3.01   sec  30.0 MBytes   251 Mbits/sec    0    140 KBytes       
[SUM]   2.00-3.01   sec  60.0 MBytes   502 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.01-4.00   sec  30.0 MBytes   252 Mbits/sec    0    130 KBytes       
[  7]   3.01-4.00   sec  30.0 MBytes   252 Mbits/sec    0    140 KBytes       
[SUM]   3.01-4.00   sec  60.0 MBytes   505 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.00-5.03   sec  31.2 MBytes   256 Mbits/sec    0    130 KBytes       
[  7]   4.00-5.03   sec  31.2 MBytes   256 Mbits/sec    0    140 KBytes       
[SUM]   4.00-5.03   sec  62.5 MBytes   511 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.03-6.01   sec  30.0 MBytes   257 Mbits/sec    0    130 KBytes       
[  7]   5.03-6.01   sec  30.0 MBytes   257 Mbits/sec    0    140 KBytes       
[SUM]   5.03-6.01   sec  60.0 MBytes   513 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   6.01-7.02   sec  31.2 MBytes   258 Mbits/sec    0    130 KBytes       
[  7]   6.01-7.02   sec  31.2 MBytes   258 Mbits/sec    0    140 KBytes       
[SUM]   6.01-7.02   sec  62.5 MBytes   517 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   7.02-8.01   sec  35.0 MBytes   298 Mbits/sec    0    130 KBytes       
[  7]   7.02-8.01   sec  35.0 MBytes   298 Mbits/sec    0    140 KBytes       
[SUM]   7.02-8.01   sec  70.0 MBytes   595 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   8.01-9.01   sec  36.2 MBytes   305 Mbits/sec    0    139 KBytes       
[  7]   8.01-9.01   sec  36.2 MBytes   305 Mbits/sec    0    140 KBytes       
[SUM]   8.01-9.01   sec  72.5 MBytes   611 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   9.01-10.03  sec  37.5 MBytes   306 Mbits/sec    0    139 KBytes       
[  7]   9.01-10.03  sec  37.5 MBytes   306 Mbits/sec    0    140 KBytes       
[SUM]   9.01-10.03  sec  75.0 MBytes   612 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.03  sec   319 MBytes   266 Mbits/sec    0             sender
[  5]   0.00-10.07  sec   319 MBytes   265 Mbits/sec                  receiver
[  7]   0.00-10.03  sec   319 MBytes   266 Mbits/sec    0             sender
[  7]   0.00-10.07  sec   319 MBytes   265 Mbits/sec                  receiver
[SUM]   0.00-10.03  sec   637 MBytes   533 Mbits/sec    0             sender
[SUM]   0.00-10.07  sec   637 MBytes   531 Mbits/sec                  receiver

iperf Done.


# mpstat 3 10
Linux 4.14.221 (OpenWrt) 	04/29/21 	_mips_	(4 CPU)

05:45:14     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
05:45:17     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
05:45:20     all    0.66    0.00    0.17    0.00    0.00    0.00    0.00    0.00    0.00   99.17
05:45:23     all    0.08    0.00   18.11    0.00    0.00   10.38    0.00    0.00    0.00   71.43
05:45:26     all    1.16    0.00   22.92    0.00    0.00   13.62    0.00    0.00    0.00   62.29
05:45:29     all    0.33    0.00   24.50    0.00    0.00   14.62    0.00    0.00    0.00   60.55
05:45:32     all    0.58    0.00   14.04    0.00    0.00   10.38    0.00    0.00    0.00   75.00
05:45:35     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
05:45:38     all    0.50    0.00    0.33    0.00    0.00    0.00    0.00    0.00    0.00   99.17

19.07.7 - RX (Server Iperf3 Stats)

Accepted connection from 192.168.69.127, port 50746
[  5] local 192.168.69.102 port 5201 connected to 192.168.69.127 port 50748
[  8] local 192.168.69.102 port 5201 connected to 192.168.69.127 port 50750
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  38.9 MBytes   326 Mbits/sec    0    334 KBytes       
[  8]   0.00-1.00   sec  36.5 MBytes   306 Mbits/sec    0    266 KBytes       
[SUM]   0.00-1.00   sec  75.4 MBytes   633 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.00-2.00   sec  37.5 MBytes   314 Mbits/sec    0    334 KBytes       
[  8]   1.00-2.00   sec  37.9 MBytes   318 Mbits/sec    0    266 KBytes       
[SUM]   1.00-2.00   sec  75.4 MBytes   632 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.00-3.00   sec  37.4 MBytes   314 Mbits/sec    0    334 KBytes       
[  8]   2.00-3.00   sec  37.0 MBytes   310 Mbits/sec    0    266 KBytes       
[SUM]   2.00-3.00   sec  74.4 MBytes   624 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.00-4.00   sec  37.5 MBytes   314 Mbits/sec    0    334 KBytes       
[  8]   3.00-4.00   sec  37.5 MBytes   315 Mbits/sec    0    266 KBytes       
[SUM]   3.00-4.00   sec  75.0 MBytes   629 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.00-5.00   sec  37.5 MBytes   315 Mbits/sec    0    334 KBytes       
[  8]   4.00-5.00   sec  37.7 MBytes   316 Mbits/sec    0    266 KBytes       
[SUM]   4.00-5.00   sec  75.3 MBytes   631 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.00-6.00   sec  37.5 MBytes   314 Mbits/sec    0    334 KBytes       
[  8]   5.00-6.00   sec  37.5 MBytes   315 Mbits/sec    0    266 KBytes       
[SUM]   5.00-6.00   sec  75.0 MBytes   629 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   6.00-7.00   sec  37.2 MBytes   312 Mbits/sec    0    430 KBytes       
[  8]   6.00-7.00   sec  36.4 MBytes   305 Mbits/sec    0    322 KBytes       
[SUM]   6.00-7.00   sec  73.5 MBytes   617 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   7.00-8.00   sec  38.3 MBytes   321 Mbits/sec    0    430 KBytes       
[  8]   7.00-8.00   sec  37.9 MBytes   318 Mbits/sec    0    322 KBytes       
[SUM]   7.00-8.00   sec  76.2 MBytes   639 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   8.00-9.00   sec  37.1 MBytes   311 Mbits/sec    0    430 KBytes       
[  8]   8.00-9.00   sec  37.0 MBytes   311 Mbits/sec    0    322 KBytes       
[SUM]   8.00-9.00   sec  74.1 MBytes   622 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   9.00-10.00  sec  37.8 MBytes   317 Mbits/sec    0    430 KBytes       
[  8]   9.00-10.00  sec  37.8 MBytes   317 Mbits/sec    0    322 KBytes       
[SUM]   9.00-10.00  sec  75.7 MBytes   635 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]  10.00-10.04  sec   954 KBytes   214 Mbits/sec    0    430 KBytes       
[  8]  10.00-10.04  sec  1.55 MBytes   356 Mbits/sec    0    322 KBytes       
[SUM]  10.00-10.04  sec  2.49 MBytes   570 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.04  sec   378 MBytes   316 Mbits/sec    0             sender
[  8]   0.00-10.04  sec   375 MBytes   313 Mbits/sec    0             sender
[SUM]   0.00-10.04  sec   752 MBytes   629 Mbits/sec    0             sender

# mpstat 3 10 
Linux 4.14.221 (OpenWrt) 	04/29/21 	_mips_	(4 CPU)

05:46:28     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
05:46:31     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
05:46:34     all    0.58    0.00    0.33    0.00    0.00    0.00    0.00    0.00    0.00   99.09
05:46:37     all    0.42    0.00   13.95    0.00    0.00   14.37    0.00    0.00    0.00   71.26
05:46:40     all    0.58    0.00   14.37    0.00    0.00   27.57    0.00    0.00    0.00   57.48
05:46:43     all    1.00    0.00   17.77    0.00    0.00   26.58    0.00    0.00    0.00   54.65
05:46:46     all    0.33    0.00   12.46    0.00    0.00   15.20    0.00    0.00    0.00   72.01
05:46:49     all    0.50    0.00    0.33    0.00    0.00    0.00    0.00    0.00    0.00   99.17
05:46:52     all    0.00    0.00    0.00    0.00    0.00    0.17    0.00    0.00    0.00   99.83

21.02-RC1 - TX

# iperf3 -c 192.168.69.102 -P 2
Connecting to host 192.168.69.102, port 5201
[  5] local 192.168.69.128 port 54862 connected to 192.168.69.102 port 5201
[  7] local 192.168.69.128 port 54864 connected to 192.168.69.102 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.02   sec  48.7 MBytes   400 Mbits/sec    0    134 KBytes       
[  7]   0.00-1.02   sec  48.6 MBytes   400 Mbits/sec    0    134 KBytes       
[SUM]   0.00-1.02   sec  97.3 MBytes   799 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.02-2.02   sec  47.5 MBytes   401 Mbits/sec    0    134 KBytes       
[  7]   1.02-2.02   sec  47.5 MBytes   401 Mbits/sec    0    146 KBytes       
[SUM]   1.02-2.02   sec  95.0 MBytes   801 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.02-3.01   sec  47.5 MBytes   399 Mbits/sec    0    134 KBytes       
[  7]   2.02-3.01   sec  47.5 MBytes   399 Mbits/sec    0    146 KBytes       
[SUM]   2.02-3.01   sec  95.0 MBytes   799 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.01-4.03   sec  46.8 MBytes   388 Mbits/sec    0    214 KBytes       
[  7]   3.01-4.03   sec  45.7 MBytes   379 Mbits/sec    0    164 KBytes       
[SUM]   3.01-4.03   sec  92.5 MBytes   767 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.03-5.01   sec  46.2 MBytes   396 Mbits/sec    0    214 KBytes       
[  7]   4.03-5.01   sec  46.2 MBytes   396 Mbits/sec    0    164 KBytes       
[SUM]   4.03-5.01   sec  92.5 MBytes   792 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.01-6.01   sec  47.5 MBytes   397 Mbits/sec    0    214 KBytes       
[  7]   5.01-6.01   sec  47.5 MBytes   397 Mbits/sec    0    164 KBytes       
[SUM]   5.01-6.01   sec  95.0 MBytes   794 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   6.01-7.01   sec  47.5 MBytes   398 Mbits/sec    0    214 KBytes       
[  7]   6.01-7.01   sec  47.5 MBytes   398 Mbits/sec    0    164 KBytes       
[SUM]   6.01-7.01   sec  95.0 MBytes   796 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   7.01-8.01   sec  47.5 MBytes   397 Mbits/sec    0    226 KBytes       
[  7]   7.01-8.01   sec  47.5 MBytes   397 Mbits/sec    0    174 KBytes       
[SUM]   7.01-8.01   sec  95.0 MBytes   795 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   8.01-9.02   sec  47.5 MBytes   396 Mbits/sec    0    226 KBytes       
[  7]   8.01-9.02   sec  47.5 MBytes   396 Mbits/sec    0    180 KBytes       
[SUM]   8.01-9.02   sec  95.0 MBytes   792 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   9.02-10.00  sec  46.2 MBytes   395 Mbits/sec    0    226 KBytes       
[  7]   9.02-10.00  sec  46.2 MBytes   395 Mbits/sec    0    180 KBytes       
[SUM]   9.02-10.00  sec  92.5 MBytes   790 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   473 MBytes   397 Mbits/sec    0             sender
[  5]   0.00-10.01  sec   473 MBytes   396 Mbits/sec                  receiver
[  7]   0.00-10.00  sec   472 MBytes   396 Mbits/sec    0             sender
[  7]   0.00-10.01  sec   472 MBytes   396 Mbits/sec                  receiver
[SUM]   0.00-10.00  sec   945 MBytes   792 Mbits/sec    0             sender
[SUM]   0.00-10.01  sec   945 MBytes   792 Mbits/sec                  receiver

iperf Done.

# mpstat 3 10
Linux 5.4.111 (OpenWrt) 	04/29/21 	_mips_	(4 CPU)

06:14:41     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
06:14:44     all    0.75    0.00    0.25    0.00    0.00    0.00    0.00    0.00    0.00   99.00
06:14:47     all    0.00    0.00    0.00    0.00    0.00    0.08    0.00    0.00    0.00   99.92
06:14:50     all    0.08    0.00   16.97    0.00    0.00   10.40    0.00    0.00    0.00   72.55
06:14:53     all    1.33    0.00   25.48    0.00    0.00   15.24    0.00    0.00    0.00   57.95
06:14:56     all    0.17    0.00   25.02    0.00    0.00   15.21    0.00    0.00    0.00   59.60
06:14:59     all    0.58    0.00   17.00    0.00    0.00    9.83    0.00    0.00    0.00   72.58
06:15:02     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
06:15:05     all    0.83    0.00    0.25    0.00    0.00    0.00    0.00    0.00    0.00   98.92

21.02-RC1 - RX (Server Iperf3 stats)

Accepted connection from 192.168.69.128, port 54872
[  5] local 192.168.69.102 port 5201 connected to 192.168.69.128 port 54874
[  8] local 192.168.69.102 port 5201 connected to 192.168.69.128 port 54876
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  28.7 MBytes   241 Mbits/sec   20    342 KBytes       
[  8]   0.00-1.00   sec  34.5 MBytes   290 Mbits/sec    1    443 KBytes       
[SUM]   0.00-1.00   sec  63.3 MBytes   531 Mbits/sec   21             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.00-2.00   sec  28.8 MBytes   241 Mbits/sec    0    403 KBytes       
[  8]   1.00-2.00   sec  31.3 MBytes   262 Mbits/sec    4    362 KBytes       
[SUM]   1.00-2.00   sec  60.0 MBytes   504 Mbits/sec    4             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.00-3.00   sec  27.8 MBytes   234 Mbits/sec    7    339 KBytes       
[  8]   2.00-3.00   sec  35.5 MBytes   298 Mbits/sec    0    428 KBytes       
[SUM]   2.00-3.00   sec  63.4 MBytes   532 Mbits/sec    7             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.00-4.00   sec  27.9 MBytes   234 Mbits/sec    2    291 KBytes       
[  8]   3.00-4.00   sec  35.2 MBytes   296 Mbits/sec   17    356 KBytes       
[SUM]   3.00-4.00   sec  63.1 MBytes   530 Mbits/sec   19             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.00-5.00   sec  27.8 MBytes   234 Mbits/sec    0    356 KBytes       
[  8]   4.00-5.00   sec  34.4 MBytes   289 Mbits/sec    0    424 KBytes       
[SUM]   4.00-5.00   sec  62.3 MBytes   522 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.00-6.00   sec  25.2 MBytes   212 Mbits/sec    1    297 KBytes       
[  8]   5.00-6.00   sec  37.7 MBytes   316 Mbits/sec    0    486 KBytes       
[SUM]   5.00-6.00   sec  62.9 MBytes   528 Mbits/sec    1             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   6.00-7.00   sec  26.1 MBytes   219 Mbits/sec    0    359 KBytes       
[  8]   6.00-7.00   sec  36.5 MBytes   307 Mbits/sec    7    395 KBytes       
[SUM]   6.00-7.00   sec  62.6 MBytes   525 Mbits/sec    7             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   7.00-8.00   sec  30.7 MBytes   258 Mbits/sec    0    420 KBytes       
[  8]   7.00-8.00   sec  30.0 MBytes   252 Mbits/sec    4    321 KBytes       
[SUM]   7.00-8.00   sec  60.7 MBytes   509 Mbits/sec    4             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   8.00-9.00   sec  33.9 MBytes   284 Mbits/sec   10    232 KBytes       
[  8]   8.00-9.00   sec  27.7 MBytes   232 Mbits/sec    0    383 KBytes       
[SUM]   8.00-9.00   sec  61.5 MBytes   516 Mbits/sec   10             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   9.00-10.00  sec  25.4 MBytes   213 Mbits/sec    0    303 KBytes       
[  8]   9.00-10.00  sec  38.7 MBytes   324 Mbits/sec    0    451 KBytes       
[SUM]   9.00-10.00  sec  64.0 MBytes   537 Mbits/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.01  sec   282 MBytes   237 Mbits/sec   40             sender
[  8]   0.00-10.01  sec   342 MBytes   286 Mbits/sec   33             sender
[SUM]   0.00-10.01  sec   624 MBytes   523 Mbits/sec   73             sender

# mpstat 3 10
Linux 5.4.111 (OpenWrt) 	04/29/21 	_mips_	(4 CPU)

06:17:59     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
06:18:02     all    0.00    0.00    0.00    0.00    0.00    0.17    0.00    0.00    0.00   99.83
06:18:05     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
06:18:08     all    1.33    0.00   16.81    0.00    0.00   31.86    0.00    0.00    0.00   50.00
06:18:11     all    0.83    0.00   22.55    0.00    0.00   44.43    0.00    0.00    0.00   32.20
06:18:14     all    1.66    0.00   23.13    0.00    0.00   43.68    0.00    0.00    0.00   31.53
06:18:17     all    0.50    0.00   12.51    0.00    0.00   24.85    0.00    0.00    0.00   62.14
06:18:20     all    0.67    0.00    0.17    0.00    0.00    0.08    0.00    0.00    0.00   99.09
06:18:23     all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
chris commented on 30.04.2021 11:49

I'm also seeing this issue. On 21.02 I'm only getting half of the line rate. Looks to be related to software interrupts.

Kristian Evensen commented on 04.05.2021 06:55

RPS/XPS is configured by default in 19.07, but has to be explicitly enabled in 21.02. In order to enable RPS/XPS, set

packet_steering

in

/etc/config/network

to 1. I haven't tested the effect of enabling RPS/XPS on mt7621, but it gave nice performance boost on mt7622.

Steven Johnson commented on 05.05.2021 01:41

Thanks for the suggestion, i tried it unfortunately it didn't yield any different results.

The issue is characterized by lots of dropped packets being reported on RX on the WAN. The same test over any LAN port runs at near Line rate with no dropped packets.

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