[Cerowrt-devel] 2.4GHz WiFi intermittent high latency/low speed issues - possibly ANI, bluetooth, or hwcrypt related?

Sun Apr 26 10:46:43 EDT 2015

Ah, thanks. So it's one of my guest WiFi clients then... wonderful.

Need to think of some way to handle this... <mangle gw00> -j DSCP
--set-dscp 0x08 isn't working, nor is bandwidth limiting. If only all
my devices could use 5GHz I could reserve that for myself. I get <=1ms
pings on 5GHz

On Sun, Apr 26, 2015 at 9:56 AM, David P. Reed <dpreed at reed.com> wrote:
> Classic symptom of bufferbloated link. One station or AP is probably not
> running Fq_codel. If some station starts a file transfer all users of the
> net suffer. Daddy why is the Internet slow? It's because someone is
> uploading and not knowing his packets are being buffered.
>
> On Apr 24, 2015, leetminiwheat <LeetMiniWheat at gmail.com> wrote:
>>
>> Have not tested 2.4GHz extensively until recently, but I've noticed
>> some intermittent issues.
>>
>> Seems kind of random but after about a day or two I start getting
>> EXTREMELY high pings on wireless devices on 2.4ghz radio especially on
>> tons of small packets (like synergy - keyboard/mouse over network),
>> and speedtests drop a ton. Tested on two laptops. kernel debug shows
>> lots of retransmits, and ANI shows increasing numbers of OFDM and CCK
>> errors. changing channels doesn't seem to help, and the ath9k module
>> parameters seem hardcoded without a /sys interface to change them, so
>> I can't test different options.
>>
>> I have not messed with any of the txqueuelen options or anything queue
>> related in /usr/sbin/debloat, they're all at default. Operating in
>> HT20 mode, WMM enabled/disabled did not matter, nor did ECN on/off
>> ingress/egress, and SQM on/off didn't matter either.
>>
>> Any ideas? Could it be bluetooth interference? I noticed bt_coex was
>> disabled, and there's a few devices around here. or possibly some
>> really far guest clients causing ANI to act up? There's about 15 other
>> APs nearby on a scan but nothing higher (lower?) than -79dbI on my
>> channel according to my phone 10ft from the AP.
>>
>> A /etc/init.d/network restart usually fixes it but not this time, nor
>> did reboots. have not tried cold boot, but will try that later though
>> it's still not a solution if it keeps coming back.
>>
>> this happens as soon as i move my mouse over to the laptop with synergy:
>> 64 bytes from 172.30.42.1: icmp_seq=101 ttl=64 time=2.25 ms
>> 64 bytes from 172.30.42.1: icmp_seq=102 ttl=64 time=4.95 ms
>> 64 bytes from 172.30.42.1: icmp_seq=103 ttl=64 time=35.9 ms
>> 64 bytes from 172.30.42.1: icmp_seq=104 ttl=64 time=3.16 ms
>> 64 bytes from 172.30.42.1: icmp_seq=105 ttl=64 time=125 ms
>> 64 bytes from 172.30.42.1: icmp_seq=106 ttl=64 time=345 ms
>> 64 bytes from 172.30.42.1: icmp_seq=107 ttl=64 time=3093 ms
>> 64 bytes from 172.30.42.1: icmp_seq=108 ttl=64 time=5696 ms
>> 64 bytes from 172.30.42.1: icmp_seq=109 ttl=64 time=5193 ms
>> 64 bytes from 172.30.42.1: icmp_seq=110 ttl=64 time=4198 ms
>> 64 bytes from 172.30.42.1: icmp_seq=112 ttl=64 time=3360 ms
>> 64 bytes from 172.30.42.1: icmp_seq=114 ttl=64 time=2597 ms
>> 64 bytes from 172.30.42.1: icmp_seq=116 ttl=64 time=2225 ms
>> 64 bytes from 172.30.42.1: icmp_seq=117 ttl=64 time=2107 ms
>> 64 bytes from 172.30.42.1: icmp_seq=118 ttl=64 time=1137 ms
>> 64 bytes from 172.30.42.1: icmp_seq=119 ttl=64 time=485 ms
>> 64 bytes from 172.30.42.1: icmp_seq=120 ttl=64 time=71.3 ms
>> 64 bytes from 172.30.42.1: icmp_seq=121 ttl=64 time=3.12 ms
>>
>> regular speedtests show about 6mbps... which normally is around 28mbps
>>
>> # uptime
>> 11:04:20 up 21 min,  load average: 0.17, 0.21, 0.33
>>
>> # iw sw00 station dump
>> Station 00:26:c7:76:ab:80 (on sw00)
>> inactive time:  31 ms
>> rx bytes:       1249755
>> rx packets:     9068
>> tx bytes:       2851502
>> tx packets:     27751
>> tx retries:     18418
>> tx failed:      0
>> signal:         -50 [-52, -56] dBm
>> signal avg:     -50 [-51, -55] dBm
>> tx bitrate:     130.0 MBit/s MCS 15
>> rx bitrate:     58.5 MBit/s MCS 6
>> authorized:     yes
>> authenticated:  yes
>> preamble:       short
>> WMM/WME:        yes
>> MFP:            no
>> TDLS peer:      no
>>
>> # iw gw00 station dump
>> Station bc:52:b7:d6:65:38 (on gw00)
>> inactive time:  4699 ms
>> rx bytes:       62140
>> rx packets:     709
>> tx bytes:       283680
>> tx packets:     358
>> tx retries:     635
>> tx failed:      17
>> signal:         -88 [-89, -93] dBm
>> signal avg:     -87 [-88, -93] dBm
>> tx bitrate:     1.0 MBit/s
>> rx bitrate:     1.0 MBit/s
>> authorized:     yes
>> authenticated:  yes
>> preamble:       short
>> WMM/WME:        yes
>> MFP:            no
>> TDLS peer:      no
>> Station e4:92:fb:57:82:b9 (on gw00)
>> inactive time:  66 ms
>> rx bytes:       657880
>> rx packets:     6043
>> tx bytes:       6950507
>> tx packets:     5663
>> tx retries:     5668
>> tx failed:      202
>> signal:         -85 [-87, -90] dBm
>> signal avg:     -85 [-87, -89] dBm
>> tx bitrate:     5.5 MBit/s
>> rx bitrate:     5.5 MBit/s
>> authorized:     yes
>> authenticated:  yes
>> preamble:       short
>> WMM/WME:        yes
>> MFP:            no
>> TDLS peer:      no
>> Station 44:a7:cf:d7:76:30 (on gw00)
>> inactive time:  2402 ms
>> rx bytes:       30852
>> rx packets:     349
>> tx bytes:       28079
>> tx packets:     132
>> tx retries:     96
>> tx failed:      0
>> signal:         -41 [-46, -42] dBm
>> signal avg:     -41 [-45, -43] dBm
>> tx bitrate:     54.0 MBit/s
>> rx bitrate:     36.0 MBit/s
>> authorized:     yes
>> authenticated:  yes
>> preamble:       short
>> WMM/WME:        yes
>> MFP:            no
>> TDLS peer:      no
>>
>> # cat /sys/kernel/debug/ieee80211/phy0/ath9k/ani
>> ANI: ENABLED
>> ANI RESET: 9
>> OFDM LEVEL: 9
>> CCK LEVEL: 7
>> SPUR UP: 205
>> SPUR DOWN: 205
>> OFDM WS-DET ON: 1
>> OFDM WS-DET OFF: 2
>> MRC-CCK ON: 0
>> MRC-CCK OFF: 0
>> FIR-STEP UP: 201
>> FIR-STEP DOWN: 178
>> INV LISTENTIME: 0
>> OFDM ERRORS: 307392
>> CCK ERRORS: 125040
>>
>> # tc qdisc (tested with/without though)
>> qdisc fq_codel a: dev se00 root refcnt 2 limit 1514p flows 1024
>> quantum 1514 target 5.0ms interval 100.0ms ecn
>> qdisc htb 1: dev ge00 root refcnt 2 r2q 10 default 12
>> direct_packets_stat 0 direct_qlen 1000
>> qdisc fq_codel 110: dev ge00 parent 1:11 limit 1001p flows 1024
>> quantum 300 target 5.0ms interval 100.0ms ecn
>> qdisc fq_codel 120: dev ge00 parent 1:12 limit 1001p flows 1024
>> quantum 300 target 5.0ms interval 100.0ms ecn
>> qdisc fq_codel 130: dev ge00 parent 1:13 limit 1001p flows 1024
>> quantum 300 target 5.0ms interval 100.0ms ecn
>> qdisc ingress ffff: dev ge00 parent ffff:fff1 ----------------
>> qdisc mq 1: dev sw10 root
>> qdisc fq_codel 10: dev sw10 parent 1:1 limit 800p flows 1024 quantum
>> 500 target 10.0ms interval 100.0ms
>> qdisc fq_codel 20: dev sw10 parent 1:2 limit 800p flows 1024 quantum
>> 300 target 5.0ms interval 100.0ms ecn
>> qdisc fq_codel 30: dev sw10 parent 1:3 limit 1000p flows 1024 quantum
>> 300 target 5.0ms interval 100.0ms ecn
>> qdisc fq_codel 40: dev sw10 parent 1:4 limit 1000p flows 1024 quantum
>> 300 target 5.0ms interval 100.0ms
>> qdisc htb 1: dev sw00 root refcnt 5 r2q 10 default 12
>> direct_packets_stat 0 direct_qlen 1000
>> qdisc fq_codel 110: dev sw00 parent 1:11 limit 1001p flows 1024
>> quantum 300 target 5.0ms interval 100.0ms
>> qdisc fq_codel 120: dev sw00 parent 1:12 limit 1001p flows 1024
>> quantum 300 target 5.0ms interval 100.0ms
>> qdisc fq_codel 130: dev sw00 parent 1:13 limit 1001p flows 1024
>> quantum 300 target 5.0ms interval 100.0ms
>> qdisc ingress ffff: dev sw00 parent ffff:fff1 ----------------
>> qdisc htb 1: dev gw00 root refcnt 5 r2q 10 default 12
>> direct_packets_stat 4 direct_qlen 1000
>> qdisc fq_codel 110: dev gw00 parent 1:11 limit 1001p flows 1024
>> quantum 300 target 8.0ms interval 103.0ms
>> qdisc fq_codel 120: dev gw00 parent 1:12 limit 1001p flows 1024
>> quantum 300 target 8.0ms interval 103.0ms
>> qdisc fq_codel 130: dev gw00 parent 1:13 limit 1001p flows 1024
>> quantum 300 target 8.0ms interval 103.0ms
>> qdisc ingress ffff: dev gw00 parent ffff:fff1 ----------------
>> qdisc htb 1: dev ifb4ge00 root refcnt 2 r2q 10 default 12
>> direct_packets_stat 0 direct_qlen 32
>> qdisc fq_codel 110: dev ifb4ge00 parent 1:11 limit 1001p flows 1024
>> quantum 500 target 5.0ms interval 100.0ms ecn
>> qdisc fq_codel 120: dev ifb4ge00 parent 1:12 limit 1001p flows 1024
>> quantum 1500 target 5.0ms interval 100.0ms ecn
>> qdisc fq_codel 130: dev ifb4ge00 parent 1:13 limit 1001p flows 1024
>> quantum 300 target 5.0ms interval 100.0ms ecn
>> qdisc htb 1: dev ifb4gw00 root refcnt 2 r2q 10 default 12
>> direct_packets_stat 0 direct_qlen 32
>> qdisc fq_codel 110: dev ifb4gw00 parent 1:11 limit 1001p flows 1024
>> quantum 500 target 10.3ms interval 105.3ms ecn
>> qdisc fq_codel 120: dev ifb4gw00 parent 1:12 limit 1001p flows 1024
>> quantum 1500 target 10.3ms interval 105.3ms ecn
>> qdisc fq_codel 130: dev ifb4gw00 parent 1:13 limit 1001p flows 1024
>> quantum 300 target 10.3ms interval 105.3ms ecn
>> qdisc htb 1: dev ifb4sw00 root refcnt 2 r2q 10 default 12
>> direct_packets_stat 0 direct_qlen 32
>> qdisc fq_codel 110: dev ifb4sw00 parent 1:11 limit 1001p flows 1024
>> quantum 500 target 5.0ms interval 100.0ms ecn
>> qdisc fq_codel 120: dev ifb4sw00 parent 1:12 limit 1001p flows 1024
>> quantum 1500 target 5.0ms interval 100.0ms ecn
>> qdisc fq_codel 130: dev ifb4sw00 parent 1:13 limit 1001p flows 1024
>> quantum 300 target 5.0ms interval 100.0ms ecn
>>
>> ________________________________
>>
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>> Cerowrt-devel at lists.bufferbloat.net
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