[LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[David Watson]

	Hello,
		I delete and recreate my root HTB qdiscs every minute as part of my rdd 
logging.

 From archive this seems to have come up a couple of times before although 
I dont see a resolution on the list, any advice on how I can find out what 
the problem is?

Thanks

	I get the following errors logged:

Jun 18 12:15:01 hostname kernel: HTB init, kernel part version 3.7
Jun 18 12:15:01 hostname kernel: KERNEL: assertion (cl && 
cl->un.leaf.q->q.qlen) failed at sch_htb.c(959)
Jun 18 12:15:02 hostname last message repeated 14 times
Jun 18 12:15:02 hostname kernel: HTB init, kernel part version 3.7
Jun 18 12:15:02 hostname kernel: KERNEL: assertion (cl && 
cl->un.leaf.q->q.qlen) failed at sch_htb.c(959)
Jun 18 12:15:02 hostname last message repeated 15 times
Jun 18 12:15:03 hostname kernel: HTB init, kernel part version 3.7
Jun 18 12:16:00 hostname kernel: HTB init, kernel part version 3.7
Jun 18 12:16:01 hostname last message repeated 3 times
Jun 18 12:16:06 hostname kernel: KERNEL: assertion (cl && 
cl->un.leaf.q->q.qlen) failed at sch_htb.c(959)
Jun 18 12:16:06 hostname kernel: htb: class 10029 isn't work conserving ?!
Jun 18 12:16:06 hostname kernel: KERNEL: assertion (cl && 
cl->un.leaf.q->q.qlen) failed at sch_htb.c(959)
Jun 18 12:16:37 hostname last message repeated 433 times

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[Stef Coene]

On Wednesday 18 June 2003 13:29, David Watson wrote:
> 	Hello,
> 		I delete and recreate my root HTB qdiscs every minute as part of my rdd
> logging.
Why?????  That's not needed.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[Giannis Stoilis]

Stef Coene wrote:
> On Wednesday 18 June 2003 13:29, David Watson wrote:
>> Çello,
>>I delete and recreate my root HTB qdiscs every minute as part of my rdd
>>logging.
> 
> Why?????  That's not needed.

Never mind that. The most important issue here is that when you delete 
your queues, any packet that happens to pass through them at that time, 
are LOST!

- Giannis Stoilis.

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[Stef Coene]

On Wednesday 18 June 2003 20:53, Giannis Stoilis wrote:
> Stef Coene wrote:
> > On Wednesday 18 June 2003 13:29, David Watson wrote:
> >> Çello,
> >>I delete and recreate my root HTB qdiscs every minute as part of my rdd
> >>logging.
> >
> > Why?????  That's not needed.
>
> Never mind that. The most important issue here is that when you delete
> your queues, any packet that happens to pass through them at that time,
> are LOST!
Are you sure?  I never tested it.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[Giannis Stoilis]

Stef Coene wrote:
> On Wednesday 18 June 2003 20:53, Giannis Stoilis wrote:
>>Never mind that. The most important issue here is that when you delete
>>your queues, any packet that happens to pass through them at that time,
>>are LOST!
> 
> Are you sure?  I never tested it.


This is how I know it:
I constantly ping my linux server from another pc. At some poing I 
delete and recreate my queues. From the pc that pings my linux server, I 
can see the replies coming, and at the point of the restart I have 
missed pinging replies and at the point after the qdisc creation, I can 
see the icmp replies coming back again.
Either every packet is lost at qdisc removal, or something else, same as 
nasty, is happening...
You should try it and see...
Also, if you have monitor_tc running at that time, you can see it dump 
some nice negative values...

- Giannis

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[Stef Coene]

On Wednesday 18 June 2003 21:17, Giannis Stoilis wrote:
> Stef Coene wrote:
> > On Wednesday 18 June 2003 20:53, Giannis Stoilis wrote:
> >>Never mind that. The most important issue here is that when you delete
> >>your queues, any packet that happens to pass through them at that time,
> >>are LOST!
> >
> > Are you sure?  I never tested it.
>
> This is how I know it:
> I constantly ping my linux server from another pc. At some poing I
> delete and recreate my queues. From the pc that pings my linux server, I
> can see the replies coming, and at the point of the restart I have
> missed pinging replies and at the point after the qdisc creation, I can
> see the icmp replies coming back again.
> Either every packet is lost at qdisc removal, or something else, same as
> nasty, is happening...
> You should try it and see...
> Also, if you have monitor_tc running at that time, you can see it dump
> some nice negative values...
:)
That's because the counters are resetten so the values are negative at that 
time.  But that will not say are packets are gone.  However, your ping test 
proves it.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[David Watson]

         I was recreating the qdiscs so that changes would be picked up 
automatically and not disturb the rrdtool generation, I've switched to a 
counter and cut out the resets.

         I did do a lot of ping tests and cannot replicate losing packets 
however.

Thanks

At 21:55 18/06/2003 +0200, you wrote:
>On Wednesday 18 June 2003 21:17, Giannis Stoilis wrote:
> > Stef Coene wrote:
> > > On Wednesday 18 June 2003 20:53, Giannis Stoilis wrote:
> > >>Never mind that. The most important issue here is that when you delete
> > >>your queues, any packet that happens to pass through them at that time,
> > >>are LOST!
> > >
> > > Are you sure?  I never tested it.
> >
> > This is how I know it:
> > I constantly ping my linux server from another pc. At some poing I
> > delete and recreate my queues. From the pc that pings my linux server, I
> > can see the replies coming, and at the point of the restart I have
> > missed pinging replies and at the point after the qdisc creation, I can
> > see the icmp replies coming back again.
> > Either every packet is lost at qdisc removal, or something else, same as
> > nasty, is happening...
> > You should try it and see...
> > Also, if you have monitor_tc running at that time, you can see it dump
> > some nice negative values...
>:)
>That's because the counters are resetten so the values are negative at that
>time.  But that will not say are packets are gone.  However, your ping test
>proves it.
>
>Stef
>
>--
>
>stef.coene@docum.org
>  "Using Linux as bandwidth manager"
>      http://www.docum.org/
>      #lartc @ irc.oftc.net
>
>_______________________________________________
>LARTC mailing list / LARTC@mailman.ds9a.nl
>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[Giannis Stoilis]

David Watson wrote:
> I did do a lot of ping tests and cannot replicate losing packets 
> however.

Hmmm, let me get back to you on this. I will test it again on Monday...

- Giannis

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] HTB Kernel log (cl && cl->un.leaf.q->q.qlen)

[Stef Coene]

On Thursday 03 July 2003 13:14, lartc@go.ro wrote:
> yes I think it depends on traffic...
> but why this?
> PS
> 1) http://qos.dyndns.org:3389/cgi-bin/fom?file@ what should I use on my
> K6 ??? default it's PSCHED_JIFFIES, i think!!
I'm not sure but if you do cat /proc/cpuinfo, do you seetsc in the flags?  I 
think that means your cpu has a timestamp counter.

> 2) http://qos.dyndns.org:3389/cgi-bin/fom?fileV those filter destroy
> patches are applyed in 2.4.21 ??
Yes.

> 3) http://qos.dyndns.org:3389/cgi-bin/fom?file! What SFQ latency should I
> use?
>             SFQ qdisc has a default queue length of 128 packets!!!!
Try the default sfq and see if that's enough.  If not, you can try to change 
the queue depth.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/