[Cake] Cake on openwrt - falling behind

[Pete Heist]

Ok, so I’ve got to figure out what’s up with my build in general, so I’m blowing away my source tree and will build master without any patches.

I don’t know if the kernel panics and unknown symbols are related somehow, but they’re not helping(!) so I’ll try to get past that. I don’t actually get logs in /sys/kernel/debug/crashlog, so I can’t even prove it’s a panic, but it’s rebooting that usually happens just as I do something net related, like start typing in ssh or do an scp, after some period of inactivity. If it’s reproducible on an unpatched build I’ll head over to the OpenWRT universe.

(the stats alignment is just proportional vs fixed fonts- they look fine in vim)

> On Jul 1, 2018, at 4:37 AM, Georgios Amanakis <gamanakis at gmail.com> wrote:
> 
> The stats got mangled in by the email, in the terminal they are
> properly aligned.
> 
> 
> ---------- Forwarded message ----------
> From: Georgios Amanakis <gamanakis at gmail.com>
> Date: Sat, Jun 30, 2018 at 10:35 PM
> Subject: Re: [Cake] Cake on openwrt - falling behind
> To: Pete Heist <pete at heistp.net>
> 
> 
> I just tested this on my wrt1900acs but it is behaving as it should. I
> used Kevin's RFC patches for iproute2 and kmod-sched-cake.
> 
> root at lede:/tmp# tc -s qdisc show dev eth0
> qdisc cake 8004: root refcnt 9 bandwidth 2500Kbit diffserv3
> triple-isolate split-gso rtt 100.0ms raw overhead 0
> Sent 122745 bytes 691 pkt (dropped 0, overlimits 419 requeues 0)
> backlog 0b 0p requeues 0
> memory used: 6416b of 4Mb
> capacity estimate: 2500Kbit
> min/max network layer size:           42 /    1186
> min/max overhead-adjusted size:       42 /    1186
> average network hdr offset:           13
> 
>                   Bulk  Best Effort        Voice
>  thresh      156248bit     2500Kbit      625Kbit
>  target        116.3ms        7.3ms       29.1ms
>  interval      232.6ms      102.3ms      124.1ms
>  pk_delay          0us        196us        8.6ms
>  av_delay          0us         13us        1.3ms
>  sp_delay          0us          2us         38us
>  backlog            0b           0b           0b
>  pkts                0          414          277
>  bytes               0        38367        84378
>  way_inds            0            0            0
>  way_miss            0           20            2
>  way_cols            0            0            0
>  drops               0            0            0
>  marks               0            0            0
>  ack_drop            0            0            0
>  sp_flows            0            1            0
>  bk_flows            0            0            1
>  un_flows            0            0            0
>  max_len             0          206         1186
>  quantum           300          300          300
> 
> root at lede:/tmp# opkg list-installed | grep cake
> kmod-sched-cake - 4.14.50+2018-06-26-0520a6cb-1
> 
> root at lede:/tmp# uname -a
> Linux lede 4.14.50 #0 SMP Wed Jun 27 21:48:32 2018 armv7l GNU/Linux
> 
> George
> 
> On Sat, Jun 30, 2018 at 7:20 PM, Pete Heist <pete at heistp.net> wrote:
>> Ok, same result (unknown symbols and routine crashing) after a make clean and re-build, but I just force installed the kmod-sched-cake package with --force-depends and it seems to work. This reproduces it, right? no stats and the debug output?
>> 
>> root at LEDE:~# tc qdisc add dev eth0 root cake
>> root at LEDE:~# tc -s -d qdisc show dev eth0
>> qdisc cake 8001: root refcnt 2 bandwidth unlimited diffserv3 triple-isolate rtt 100.0ms raw overhead 0
>> tca_stats 2005579564 tca_stats2 0 tca_xstats 0
>> calling print_tcstats_attr()
>> print_tcstats_attr()
>> got stats
>> Sent 9070 bytes 66 pkts (dropped 0, overlimits 0)
>> got xstats 0 tca_stats 2005579564 tca_stats2 0 tca_xstats 0
>> 
>> root at LEDE:~# cat /proc/cpuinfo
>> system type             : Atheros AR7240 rev 2
>> machine                 : OpenMesh OM2P
>> processor               : 0
>> cpu model               : MIPS 24Kc V7.4
>> BogoMIPS                : 265.42
>> wait instruction        : yes
>> microsecond timers      : yes
>> tlb_entries             : 16
>> extra interrupt vector  : yes
>> hardware watchpoint     : yes, count: 4, address/irw mask: [0x0ffc, 0x0ffc, 0x0ffb, 0x0ffb]
>> isa                     : mips1 mips2 mips32r1 mips32r2
>> ASEs implemented        : mips16
>> shadow register sets    : 1
>> kscratch registers      : 0
>> package                 : 0
>> core                    : 0
>> VCED exceptions         : not available
>> VCEI exceptions         : not available
>> 
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