[FS#3674] WLAN transfer rate drops extreme under high load

OpenWrt Bugs openwrt-bugs at lists.openwrt.org
Tue Mar 16 12:28:54 GMT 2021


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The following task has a new comment added:

FS#3674 - WLAN transfer rate drops extreme under high load
User who did this - Gerry K (renegat)

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Today I tried it again with latest snapshot on Maginon WL-755 AC with the same result:

WLAN transfer rate drops than the routers wlan crashes completely.
Sometimes it comes back up after a while, sometimes not and you have to reset / powercycle it.

Cross check with original firmware for Maginon WL-755 AC:
Much better transfer speed in bidirectional test simultaneously, no drops, no crashes: 


 iperf -c 192.168.10.100 -t 300 -i 5 -d
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 192.168.10.100, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  4] local 192.168.10.101 port 41534 connected with 192.168.10.100 port 5001
[  5] local 192.168.10.101 port 5001 connected with 192.168.10.100 port 43866
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0- 5.0 sec  50.1 MBytes  84.1 Mbits/sec
[  5]  0.0- 5.0 sec  42.1 MBytes  70.7 Mbits/sec
[  4]  5.0-10.0 sec  47.8 MBytes  80.1 Mbits/sec
[  5]  5.0-10.0 sec  47.7 MBytes  80.1 Mbits/sec
[  4] 10.0-15.0 sec  46.5 MBytes  78.0 Mbits/sec
[  5] 10.0-15.0 sec  49.1 MBytes  82.4 Mbits/sec
[  4] 15.0-20.0 sec  52.0 MBytes  87.2 Mbits/sec
[  5] 15.0-20.0 sec  43.2 MBytes  72.5 Mbits/sec
[  4] 20.0-25.0 sec  52.5 MBytes  88.1 Mbits/sec
[  5] 20.0-25.0 sec  42.9 MBytes  72.0 Mbits/sec
[  4] 25.0-30.0 sec  53.4 MBytes  89.5 Mbits/sec
[  5] 25.0-30.0 sec  41.7 MBytes  69.9 Mbits/sec
[  4] 30.0-35.0 sec  53.5 MBytes  89.8 Mbits/sec
[  5] 30.0-35.0 sec  41.9 MBytes  70.3 Mbits/sec
[  4] 35.0-40.0 sec  54.9 MBytes  92.1 Mbits/sec
[  5] 35.0-40.0 sec  41.4 MBytes  69.5 Mbits/sec
[  4] 40.0-45.0 sec  53.1 MBytes  89.1 Mbits/sec
[  5] 40.0-45.0 sec  40.2 MBytes  67.5 Mbits/sec
[  4] 45.0-50.0 sec  53.4 MBytes  89.5 Mbits/sec
[  5] 45.0-50.0 sec  42.8 MBytes  71.9 Mbits/sec
[  4] 50.0-55.0 sec  52.0 MBytes  87.2 Mbits/sec
[  5] 50.0-55.0 sec  43.5 MBytes  73.0 Mbits/sec
[  4] 55.0-60.0 sec  54.0 MBytes  90.6 Mbits/sec
[  5] 55.0-60.0 sec  41.3 MBytes  69.3 Mbits/sec
[  4] 60.0-65.0 sec  52.0 MBytes  87.2 Mbits/sec
[  5] 60.0-65.0 sec  43.8 MBytes  73.5 Mbits/sec
[  4] 65.0-70.0 sec  53.2 MBytes  89.3 Mbits/sec
[  5] 65.0-70.0 sec  43.3 MBytes  72.7 Mbits/sec
[  4] 70.0-75.0 sec  52.4 MBytes  87.9 Mbits/sec
[  5] 70.0-75.0 sec  43.8 MBytes  73.5 Mbits/sec
[  4] 75.0-80.0 sec  53.5 MBytes  89.8 Mbits/sec
[  5] 75.0-80.0 sec  45.4 MBytes  76.2 Mbits/sec
[  4] 80.0-85.0 sec  52.0 MBytes  87.2 Mbits/sec
[  5] 80.0-85.0 sec  45.6 MBytes  76.5 Mbits/sec
[  4] 85.0-90.0 sec  52.2 MBytes  87.7 Mbits/sec
[  5] 85.0-90.0 sec  41.2 MBytes  69.0 Mbits/sec
[  4] 90.0-95.0 sec  49.2 MBytes  82.6 Mbits/sec
[  5] 90.0-95.0 sec  44.3 MBytes  74.3 Mbits/sec
[  4] 95.0-100.0 sec  50.6 MBytes  84.9 Mbits/sec
[  5] 95.0-100.0 sec  44.9 MBytes  75.3 Mbits/sec
[  4] 100.0-105.0 sec  53.5 MBytes  89.8 Mbits/sec
[  5] 100.0-105.0 sec  39.8 MBytes  66.7 Mbits/sec
[  4] 105.0-110.0 sec  53.8 MBytes  90.2 Mbits/sec
[  5] 105.0-110.0 sec  42.5 MBytes  71.4 Mbits/sec
[  4] 110.0-115.0 sec  50.6 MBytes  84.9 Mbits/sec
[  5] 110.0-115.0 sec  45.2 MBytes  75.8 Mbits/sec
[  4] 115.0-120.0 sec  51.9 MBytes  87.0 Mbits/sec
[  5] 115.0-120.0 sec  43.6 MBytes  73.1 Mbits/sec
[  4] 120.0-125.0 sec  54.9 MBytes  92.1 Mbits/sec
[  5] 120.0-125.0 sec  40.1 MBytes  67.3 Mbits/sec
[  4] 125.0-130.0 sec  51.9 MBytes  87.0 Mbits/sec
[  5] 125.0-130.0 sec  42.1 MBytes  70.6 Mbits/sec
[  4] 130.0-135.0 sec  54.9 MBytes  92.1 Mbits/sec
[  5] 130.0-135.0 sec  40.5 MBytes  68.0 Mbits/sec
[  4] 135.0-140.0 sec  56.1 MBytes  94.2 Mbits/sec
[  5] 135.0-140.0 sec  40.3 MBytes  67.7 Mbits/sec
[  4] 140.0-145.0 sec  50.6 MBytes  84.9 Mbits/sec
[  5] 140.0-145.0 sec  43.8 MBytes  73.5 Mbits/sec
[  4] 145.0-150.0 sec  52.0 MBytes  87.2 Mbits/sec
[  5] 145.0-150.0 sec  42.5 MBytes  71.3 Mbits/sec
[  4] 150.0-155.0 sec  54.8 MBytes  91.9 Mbits/sec
[  5] 150.0-155.0 sec  41.2 MBytes  69.1 Mbits/sec
[  4] 155.0-160.0 sec  53.8 MBytes  90.2 Mbits/sec
[  5] 155.0-160.0 sec  41.6 MBytes  69.8 Mbits/sec
[  4] 160.0-165.0 sec  56.1 MBytes  94.2 Mbits/sec
[  5] 160.0-165.0 sec  42.4 MBytes  71.2 Mbits/sec
[  4] 165.0-170.0 sec  53.5 MBytes  89.8 Mbits/sec
[  5] 165.0-170.0 sec  42.8 MBytes  71.8 Mbits/sec
[  4] 170.0-175.0 sec  48.9 MBytes  82.0 Mbits/sec
[  5] 170.0-175.0 sec  47.5 MBytes  79.7 Mbits/sec
[  4] 175.0-180.0 sec  45.1 MBytes  75.7 Mbits/sec
[  5] 175.0-180.0 sec  48.7 MBytes  81.7 Mbits/sec
[  4] 180.0-185.0 sec  52.0 MBytes  87.2 Mbits/sec
[  5] 180.0-185.0 sec  43.4 MBytes  72.8 Mbits/sec
[  4] 185.0-190.0 sec  53.4 MBytes  89.5 Mbits/sec
[  5] 185.0-190.0 sec  42.0 MBytes  70.4 Mbits/sec
[  4] 190.0-195.0 sec  53.8 MBytes  90.2 Mbits/sec
[  5] 190.0-195.0 sec  42.9 MBytes  72.1 Mbits/sec
[  4] 195.0-200.0 sec  54.6 MBytes  91.6 Mbits/sec
[  5] 195.0-200.0 sec  42.3 MBytes  70.9 Mbits/sec
[  4] 200.0-205.0 sec  50.6 MBytes  84.9 Mbits/sec
[  5] 200.0-205.0 sec  45.9 MBytes  77.1 Mbits/sec
[  4] 205.0-210.0 sec  50.5 MBytes  84.7 Mbits/sec
[  5] 205.0-210.0 sec  46.3 MBytes  77.7 Mbits/sec
[  4] 210.0-215.0 sec  53.4 MBytes  89.5 Mbits/sec
[  5] 210.0-215.0 sec  43.2 MBytes  72.5 Mbits/sec
[  4] 215.0-220.0 sec  53.5 MBytes  89.8 Mbits/sec
[  5] 215.0-220.0 sec  41.8 MBytes  70.2 Mbits/sec
[  4] 220.0-225.0 sec  52.0 MBytes  87.2 Mbits/sec
[  5] 220.0-225.0 sec  41.8 MBytes  70.2 Mbits/sec
[  4] 225.0-230.0 sec  53.5 MBytes  89.8 Mbits/sec
[  5] 225.0-230.0 sec  43.7 MBytes  73.3 Mbits/sec
[  4] 230.0-235.0 sec  52.2 MBytes  87.7 Mbits/sec
[  5] 230.0-235.0 sec  44.1 MBytes  74.0 Mbits/sec
[  4] 235.0-240.0 sec  55.0 MBytes  92.3 Mbits/sec
[  5] 235.0-240.0 sec  36.0 MBytes  60.3 Mbits/sec
[  4] 240.0-245.0 sec  56.0 MBytes  94.0 Mbits/sec
[  5] 240.0-245.0 sec  34.4 MBytes  57.7 Mbits/sec
[  4] 245.0-250.0 sec  54.9 MBytes  92.1 Mbits/sec
[  5] 245.0-250.0 sec  39.5 MBytes  66.3 Mbits/sec
[  4] 250.0-255.0 sec  53.4 MBytes  89.5 Mbits/sec
[  5] 250.0-255.0 sec  42.0 MBytes  70.5 Mbits/sec
[  4] 255.0-260.0 sec  52.0 MBytes  87.2 Mbits/sec
[  5] 255.0-260.0 sec  41.2 MBytes  69.1 Mbits/sec
[  4] 260.0-265.0 sec  51.9 MBytes  87.0 Mbits/sec
[  5] 260.0-265.0 sec  44.6 MBytes  74.9 Mbits/sec
[  4] 265.0-270.0 sec  53.5 MBytes  89.8 Mbits/sec
[  5] 265.0-270.0 sec  44.4 MBytes  74.6 Mbits/sec
[  4] 270.0-275.0 sec  54.4 MBytes  91.2 Mbits/sec
[  5] 270.0-275.0 sec  41.1 MBytes  69.0 Mbits/sec
[  4] 275.0-280.0 sec  50.6 MBytes  84.9 Mbits/sec
[  5] 275.0-280.0 sec  46.2 MBytes  77.5 Mbits/sec
[  4] 280.0-285.0 sec  50.5 MBytes  84.7 Mbits/sec
[  5] 280.0-285.0 sec  45.4 MBytes  76.2 Mbits/sec
[  4] 285.0-290.0 sec  53.6 MBytes  90.0 Mbits/sec
[  5] 285.0-290.0 sec  41.1 MBytes  69.0 Mbits/sec
[  4] 290.0-295.0 sec  51.0 MBytes  85.6 Mbits/sec
[  5] 290.0-295.0 sec  43.3 MBytes  72.7 Mbits/sec
[  4] 295.0-300.0 sec  52.0 MBytes  87.2 Mbits/sec
[  4]  0.0-300.1 sec  3.08 GBytes  88.0 Mbits/sec
[  5] 295.0-300.0 sec  44.7 MBytes  75.0 Mbits/sec
[  5]  0.0-300.0 sec  2.52 GBytes  72.0 Mbits/sec
[SUM]  0.0-300.0 sec  2.56 GBytes  73.2 Mbits/sec




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https://bugs.openwrt.org/index.php?do=details&task_id=3674#comment9490

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