Re: [Codel] CoDel + 3.3 kernel

["Roger Jørgensen" <rogerj@gmail.com>]

On Sat, May 26, 2012 at 11:01 AM, Rishita Rajal Anubhai
<rishita@stanford.edu> wrote:
> Hi all,
>
> I built the kernel from source (net-next) and have the exact same
> issue of the 'unknown qdisc'. Any thoughts on what could be wrong
> with the config or debugging ideas would be very helpful.

Don't know which version or where you've downloaded iproute source,
but the issue sound familiar to what I had for a while - the short
explanation is that you're using the wrong binary.
Try running it directly from the installation directory
# ./tc/tc qdisc show

Anyway, you've probably done make install and that didn't work for the
source I had, the Makefile tried to install everything into
"ROOTDIR=$(DESTDIR)" but DESTDIR was never defined, as soon as I did
that everything worked smooth.



--- Roger J ---

>
> Thanks,
> Rishita
>
>
>
> ----- Original Message -----
> From: "Dave Taht" <dave.taht@gmail.com>
> To: amoghvk@stanford.edu
> Cc: codel@lists.bufferbloat.net, cs244-spr1112-staff@lists.stanford.edu, "Rishita Anubhai" <rishita@stanford.edu>
> Sent: Wednesday, May 23, 2012 3:36:49 PM
> Subject: Re: [Codel] CoDel + 3.3 kernel
>
> you didn't install the tc utility properly.
>
> what I usually do is
>
> TC=/path/to/my/codel/repo/tc/tc
> export TC
> $TC -s qdisc show dev whatever
>
> you will see on these lists pointers to a netperf script, called bloat.sh
> which could use some improvement. Also, netperf from svn has multiple
> new features useful in exploring this stuff, notably remote control
> of different congestion control algorithms, tos/diffserv bit setting, etc.
>
> I note that it helps to turn BQL down to minimal values.
>
> I note also that fq_codel is pretty amazing, too. So is qfq + codel.
>
> Happy explorations.
>
> See also the debloat, and simple_qos.sh scripts in my deBloat github repository.
>
> We look forward to hearing about your results.
>
> On Wed, May 23, 2012 at 11:02 PM, Amogh Vasekar <amoghvk@stanford.edu> wrote:
>> Hello Developers,
>>
>> This is Amogh here, a Masters student at Stanford University. As a first
>> step towards exploring CoDel, we're trying to reproduce the results on EC2
>> using OpenFlow + Mininet and then take it from there.
>>
>> So far, I have CoDel with kernel 3.3 (Thanks for the deb packages! More on
>> kernel 3.4 later), with the codel specific iproute2 patch installed.
>>
>> With htb qdisc at root, and CoDel children I have an output as follows :
>>
>> ---------
>> tc -s qdisc show dev eth0
>>
>> qdisc htb 1: root refcnt 2 r2q 10 default 12 direct_packets_stat 770
>>  Sent 112338 bytes 961 pkt (dropped 0, overlimits 0 requeues 0)
>>  backlog 0b 0p requeues 0
>> qdisc codel 110: parent 1:11 [Unknown qdisc, optlen=32]
>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>>  backlog 0b 0p requeues 0
>> qdisc codel 120: parent 1:12 [Unknown qdisc, optlen=32]
>>  Sent 6364 bytes 56 pkt (dropped 0, overlimits 0 requeues 0)
>>  backlog 0b 0p requeues 0
>> qdisc codel 130: parent 1:13 [Unknown qdisc, optlen=32]
>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>>  backlog 0b 0p requeues 0
>> -------------------
>>
>> I was wondering why I get an Unknown qdisc, optlen=32 error, even after
>> using the codel-specific iproute2 from Git. I noticed that the Git package
>> has fq_codel specific code (I am using base Codel in kernel 3.3), is it not
>> configured to handle this?
>>
>> Thanks for your help, excited about CoDel !! Let us know if you have any
>> suggestions.
>>
>> Amogh
>>
>> _______________________________________________
>> Codel mailing list
>> Codel@lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/codel
>>
>
>
>
> --
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://www.bufferbloat.net
> _______________________________________________
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> Codel@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/codel



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