[LEDE-DEV] Cake SQM killing my DIR-860L - was: [17.01] Kernel: bump to 4.4.51

[Weedy]

On 28 February 2017 at 05:40, Martin Tippmann <mt at i3o.de> wrote:
> On Mon, Feb 27, 2017 at 9:17 PM, Stijn Segers
> <francesco.borromini at inventati.org> wrote:
>> Okay, so I tracked it down to cake being the culprit. When I disable the
>> Cake SQM instance, no more of those traces, and no more sudden reboots.
>>
>> If I can help debug this, let me know - I enabled a Cake SQM instance on an
>> APU2 and so far that seems to run fine.
>
> cake: Maybe it's related - I'm seeing high cpu usage with cake on
> TP-Link 841N routers even with none, moderate traffic after a while. I
> don't see hanging tasks in the logs but the system feels sluggish even
> it's idle.


I have a WR842ND v2, I'm also seeing high CPU suddenly with only
default fq-codel on 4.4.50.
Are you able to git bisect? This particular device is installed in a
remote location so I can't deal with it for a while.

 >pppoe-wan                    │ 494.90KiB    351 pps     │  12.13KiB    192 pps

Mem: 19620K used, 8308K free, 4K shrd, 864K buff, 1472K cached
CPU:   1% usr  93% sys   0% nic   0% idle   0% io   0% irq   4% sirq
Load average: 6.89 4.88 2.96 5/58 9906
  PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
 1555     1 root     R     1948   7%  16% /usr/sbin/hostapd -s -P /var/run/wifi
   97     2 root     SW       0   0%  12% [kworker/0:1]
  440     1 root     S     1180   4%   7% /sbin/ubusd
 9165  8584 root     R     1196   4%   5% top -d3
  840     1 root     S     1396   5%   5% /usr/sbin/odhcpd
 9886  9883 root     R     1224   4%   4% /bin/sh /etc/netCheck.sh
    3     2 root     SW       0   0%   4% [ksoftirqd/0]
  104     2 root     SW       0   0%   2% [kswapd0]

On the other hand, here is my WDR4300

 >pppoe-wan                    │ 420.29KiB   1.69K pps    │  78.09KiB
 1.10K pps

Mem: 21212K used, 6716K free, 12K shrd, 792K buff, 1584K cached
CPU:   6% usr  88% sys   0% nic   0% idle   0% io   0% irq   5% sirq
Load average: 3.38 2.13 1.16 1/56 9259
  PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
   97     2 root     RW       0   0%  18% [kworker/0:1]
 1555     1 root     S     1948   7%  12% /usr/sbin/hostapd -s -P /var/run/wifi
 2714  2713 root     R     2484   9%   4% /usr/sbin/bmon -p ppp*
 9240  9239 root     S     1184   4%   4% /bin/ping -W 3 -c 6 -q -I pppoe-wan g
  840     1 root     S     1396   5%   4% /usr/sbin/odhcpd
    3     2 root     SW       0   0%   4% [ksoftirqd/0]
 9241  9239 root     S     1204   4%   3% awk /packets received  {print $4}
 9165  8584 root     R     1188   4%   3% top -d3
 2389     1 dnsmasq  S     1412   5%   2% /usr/sbin/dnsmasq -C /var/etc/dnsmasq