[Cerowrt-devel] Fwd: Re: CeroWrt 3.10.24-8 badly bloated?

Sebastian Moeller moeller0 at gmx.de
Fri Dec 27 19:07:25 EST 2013 

Hi Fred,


On Dec 27, 2013, at 21:20 , Fred Stratton <fredstratton at imap.cc> wrote:

> I guessed input into Dangerous options was required, but was unsure of the syntax.  Quite how /etc/config/sqm is read is another matter to be addressed over ssh.
> 
> I shall paste all in one email response, for you to rearrange at the other end. Both use simple.qos.
> 
> With pie:
> 
> tc -d qdisc
> qdisc fq_codel a: dev se00 root refcnt 2 limit 1000p flows 1024 quantum 1000 target 5.0ms interval 100.0ms ecn 
> qdisc htb 1: dev ge00 root refcnt 2 r2q 10 default 12 direct_packets_stat 6 ver 3.17
>  linklayer atm overhead 18 mtu 2047 tsize 128 
> qdisc pie 110: dev ge00 parent 1:11 limit 1000p target 25000 tupdate 30000 alpha 2 beta 20 
> qdisc pie 120: dev ge00 parent 1:12 limit 1000p target 25000 tupdate 30000 alpha 2 beta 20 
> qdisc pie 130: dev ge00 parent 1:13 limit 1000p target 25000 tupdate 30000 alpha 2 beta 20 
> qdisc ingress ffff: dev ge00 parent ffff:fff1 ---------------- 
> qdisc htb 1: dev ifb0 root refcnt 2 r2q 10 default 12 direct_packets_stat 0 ver 3.17
>  linklayer atm overhead 18 mtu 2047 tsize 128 
> qdisc pie 110: dev ifb0 parent 1:11 limit 1000p target 20000 tupdate 30000 alpha 2 beta 20 ecn 
> qdisc pie 120: dev ifb0 parent 1:12 limit 1000p target 20000 tupdate 30000 alpha 2 beta 20 ecn 
> qdisc pie 130: dev ifb0 parent 1:13 limit 1000p target 20000 tupdate 30000 alpha 2 beta 20 ecn 
> 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 mq 1: dev sw00 root 
> qdisc fq_codel 10: dev sw00 parent 1:1 limit 800p flows 1024 quantum 500 target 10.0ms interval 100.0ms 
> qdisc fq_codel 20: dev sw00 parent 1:2 limit 800p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 30: dev sw00 parent 1:3 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 40: dev sw00 parent 1:4 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms 
> qdisc mq 1: dev gw00 root 
> qdisc fq_codel 10: dev gw00 parent 1:1 limit 800p flows 1024 quantum 500 target 10.0ms interval 100.0ms 
> qdisc fq_codel 20: dev gw00 parent 1:2 limit 800p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 30: dev gw00 parent 1:3 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 40: dev gw00 parent 1:4 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms 
> qdisc mq 1: dev gw10 root 
> qdisc fq_codel 10: dev gw10 parent 1:1 limit 800p flows 1024 quantum 500 target 10.0ms interval 100.0ms 
> qdisc fq_codel 20: dev gw10 parent 1:2 limit 800p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 30: dev gw10 parent 1:3 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 40: dev gw10 parent 1:4 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms 
> qdisc fq_codel a: dev pppoe-ge00 root refcnt 2 limit 1000p flows 1024 quantum 1000 target 5.0ms interval 100.0ms ecn 
> 
> 
> tc class show dev ge00
> class htb 1:11 parent 1:1 leaf 110: prio 1 rate 128000bit ceil 316000bit burst 1600b cburst 1599b 
> class htb 1:1 root rate 950000bit ceil 950000bit burst 1599b cburst 1599b 
> class htb 1:10 parent 1:1 prio 0 rate 950000bit ceil 950000bit burst 1599b cburst 1599b 
> class htb 1:13 parent 1:1 leaf 130: prio 3 rate 158000bit ceil 934000bit burst 1599b cburst 1599b 
> class htb 1:12 parent 1:1 leaf 120: prio 2 rate 158000bit ceil 934000bit burst 1599b cburst 1599b 
> 
> with fq_codel, and 25ms target:
> 
> tc -d qdisc
> qdisc fq_codel a: dev se00 root refcnt 2 limit 1000p flows 1024 quantum 1000 target 5.0ms interval 100.0ms ecn 
> qdisc htb 1: dev ge00 root refcnt 2 r2q 10 default 12 direct_packets_stat 9 ver 3.17
>  linklayer atm overhead 18 mtu 2047 tsize 128 
> qdisc fq_codel 110: dev ge00 parent 1:11 limit 1000p flows 1024 quantum 300 target 25.0ms interval 100.0ms 
> qdisc fq_codel 120: dev ge00 parent 1:12 limit 1000p flows 1024 quantum 300 target 25.0ms interval 100.0ms 
> qdisc fq_codel 130: dev ge00 parent 1:13 limit 1000p flows 1024 quantum 300 target 25.0ms interval 100.0ms 

	Great, so this worked okay, all three fq_codels on ge00 (egress) have an interval of 25ms, just as the Doctor (aka, Dave) ordered :). Does this help to get fq_codel subjectively judged performance to be equal to pie?

Best 
	Sebastian



> qdisc ingress ffff: dev ge00 parent ffff:fff1 ---------------- 
> qdisc htb 1: dev ifb0 root refcnt 2 r2q 10 default 12 direct_packets_stat 0 ver 3.17
>  linklayer atm overhead 18 mtu 2047 tsize 128 
> qdisc fq_codel 110: dev ifb0 parent 1:11 limit 1000p flows 1024 quantum 500 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 120: dev ifb0 parent 1:12 limit 1000p flows 1024 quantum 1500 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 130: dev ifb0 parent 1:13 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc mq 1: dev sw00 root 
> qdisc fq_codel 10: dev sw00 parent 1:1 limit 800p flows 1024 quantum 500 target 10.0ms interval 100.0ms 
> qdisc fq_codel 20: dev sw00 parent 1:2 limit 800p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 30: dev sw00 parent 1:3 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 40: dev sw00 parent 1:4 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms 
> 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 mq 1: dev gw00 root 
> qdisc fq_codel 10: dev gw00 parent 1:1 limit 800p flows 1024 quantum 500 target 10.0ms interval 100.0ms 
> qdisc fq_codel 20: dev gw00 parent 1:2 limit 800p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 30: dev gw00 parent 1:3 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 40: dev gw00 parent 1:4 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms 
> qdisc mq 1: dev gw10 root 
> qdisc fq_codel 10: dev gw10 parent 1:1 limit 800p flows 1024 quantum 500 target 10.0ms interval 100.0ms 
> qdisc fq_codel 20: dev gw10 parent 1:2 limit 800p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 30: dev gw10 parent 1:3 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms ecn 
> qdisc fq_codel 40: dev gw10 parent 1:4 limit 1000p flows 1024 quantum 300 target 5.0ms interval 100.0ms 
> qdisc fq_codel a: dev pppoe-ge00 root refcnt 2 limit 1000p flows 1024 quantum 1000 target 5.0ms interval 100.0ms ecn 
> 
> 
> tc class show dev ge00
> class htb 1:11 parent 1:1 leaf 110: prio 1 rate 128000bit ceil 316000bit burst 1600b cburst 1599b 
> class htb 1:1 root rate 950000bit ceil 950000bit burst 1599b cburst 1599b 
> class htb 1:10 parent 1:1 prio 0 rate 950000bit ceil 950000bit burst 1599b cburst 1599b 
> class htb 1:13 parent 1:1 leaf 130: prio 3 rate 158000bit ceil 934000bit burst 1599b cburst 1599b 
> class htb 1:12 parent 1:1 leaf 120: prio 2 rate 158000bit ceil 934000bit burst 1599b cburst 1599b 
> class fq_codel 110:2c9 parent 110: 
> class fq_codel 120:1a5 parent 120: 
> class fq_codel 120:31f parent 120: 
> 
> 
> 
> On 27/12/13 19:49, Dave Taht wrote:
>> 
>> Pie has a default latency target of 20ms, fq codel 5ms. (But the fq code target matters less as the target only applies to queue building flows)
>> 
>> A packet takes 13ms to transit the device at 1mbit.
>> 
>> There is a change to fq codel in this release that should make fiddling with target a low speeds less needed. (But might have other problems) Still a comparison at roughly the same target vs a vs pie in your environment would be very interesting.
>> 
>> I suggested 25ms as a test (as pie never makes 20ms anyway)
>> 
>> I came close to inserting a simple formula to start increasing the target below 4mbit in this release.
>> 
>> On Dec 27, 2013 11:25 AM, "Sebastian Moeller" <moeller0 at gmx.de> wrote:
>> >
>> > Hi Fred,
>> >
>> > you could try to put "target 25ms" without the quotes into the advanced egress options field in the "Queue Discipline" tab, that is exposed after checking "Show Dangerous Configuration". I would love to hear whether that worked or not (I am not able to test anything myself). Maybe posting the output of "tc -d qdisc" and "tc class show dev ge00" would help. Good luck…
>> >
>> >
>> > Best Regards
>> >         Sebastian
>> >
>> >
>> > On Dec 27, 2013, at 20:20 , Fred Stratton <fredstratton at imap.cc> wrote:
>> >
>> > > I have been using pie for approximately 3 weeks.
>> > >
>> > > You are correct, in that the outbound speed is about 800 - 900 kb/s.
>> > >
>> > > I shall try what you suggest, but do not know how to express the target of 25 ms as a configuration option.
>> > >
>> > >
>> > > On 27/12/13 19:15, Dave Taht wrote:
>> > >> Dear fred: are you sticking with pie? I was going to suggest you try fq codel with a target 25ms on your outbound. (You are at 800kbit or so as best I recall?)
>> > >>
>> > >> On Dec 27, 2013 11:10 AM, "Fred Stratton" <fredstratton at imap.cc> wrote:
>> > >> I upgraded to 3.10.24-8 on 2013-12-23.
>> > >>
>> > >> I modified /etc/fixdaemons, adding
>> > >> /etc/init.d/sqm restart
>> > >>
>> > >> input the appropriate sqm settings, transcribed from aqm
>> > >>
>> > >> rebooted
>> > >>
>> > >> and the build works very well. For ADSL2+ here, it is the best so far.
>> > >>
>> > >>
>> > >> On 27/12/13 18:55, Dave Taht wrote:
>> > >>> A race condition appears to have crept in...
>> > >>>
>> > >>> ---------- Forwarded message ----------
>> > >>> From: "Dave Taht" <dave.taht at gmail.com>
>> > >>> Date: Dec 27, 2013 10:47 AM
>> > >>> Subject: Re: [Cerowrt-devel] CeroWrt 3.10.24-8 badly bloated?
>> > >>> To: "Richard E. Brown" <richb.hanover at gmail.com>
>> > >>> Cc:
>> > >>>
>> > >>> Probably didn't start sqm properly
>> > >>>
>> > >>> Restart it by hand via /etc/init.d/sqm restart
>> > >>>
>> > >>> tc -s qdisc show dev ge00
>> > >>>
>> > >>> Should show htb and fq codel.
>> > >>>
>> > >>> On Dec 27, 2013 10:36 AM, "Rich Brown" <richb.hanover at gmail.com> wrote:
>> > >>> So I screwed up my courage and replaced my 3.10.18-? firmware in my primary router with 3.10.24-8. That version had worked well as a secondary, so I figured, What the heck… Let’s give it try.
>> > >>>
>> > >>> The result was not pretty. I set my link speeds in the SQM page, chose the defaults for the Queue Discipline tab, and link layer to ATM with no additional overhead for my DSL link.
>> > >>>
>> > >>> Ping times to google are normally ~51-54 msec. But when I fired up speedtest.net, they jumped to 1500-2500 msec. Is there something I should look at before reverting? Thanks.
>> > >>>
>> > >>> Rich
>> > >>> _______________________________________________
>> > >>> Cerowrt-devel mailing list
>> > >>> Cerowrt-devel at lists.bufferbloat.net
>> > >>> https://lists.bufferbloat.net/listinfo/cerowrt-devel
>> > >>>
>> > >>>
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>> > >>>
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>> > >>
>> > >
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>

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