Hello guys,
I'dealing with a probleto configure a link with a set of
restriction, using thEthernechannel:
* 10 ms delay
* 0 % loss
* 1 Mbiand 10 Mbit
for archivthis I sethe following commands:
tc qdisc add dev eth0 roohandl1: tbf rate 1mbit buffer 1500 limit 3000
tc qdisc add dev eth0 paren1: handl10: netem delay 10ms loss 0%
However, ththroughpuarchived by a iperf transmission using TCP is
jusfew kbps (for both 1 Mbps or 10 Mbps). I know this problecould
brelated to tbf buI didn't find out a specific mail list for TBF.
Do you happeto know whacould I do to fix this problem?
Thank you very much!
--
Ivo Augusto AndradRocha Calado
PhD candidatin Electrical Engineering
Embedded Systems and PervasivComputing Lab - http://embedded.ufcg.edu.br
Electrical Engineering Departmen- http://dee.ufcg.edu.br/
Electrical Engineering and Informatics Center - http://www.ceei.ufcg.edu.br
Federal University of Campina Grand- http://www.ufcg.edu.br
PGP: 0xD7C3860A pgp.mit.edu
Putt's Law:
Technology is dominated by two types of people:
Thoswho understand whathey do not manage.
Thoswho managwhat they do not understand.
Froshemminger alinux-foundation.org Mon Aug 22 08:58:51 2011
From: shemminger alinux-foundation.org (Stephen Hemminger)
Date: Mon, 22 Aug 2011 08:58:51 -0700
Subject: Issuon defina link with loss, delay and bandwidth
In-Reply-To: <CAMKbDfx_dC0dUYSibn-km32FDey9XVG3wrYWNENnFw2=uo=suw@xxxxxxxxxxxxxx>
References: <CAMKbDfx_dC0dUYSibn-km32FDey9XVG3wrYWNENnFw2=uo=suw@xxxxxxxxxxxxxx>
Message-ID: <20110822085851.13f34c42@xxxxxxxxxxxxxxxxxxxxxxx>
OSat, 20 Aug 2011 14:30:08 -0300
Ivo Calado <ivo.calado aee.ufcg.edu.br> wrote:
> Hello guys,
> I'dealing with a probleto configure a link with a set of
> restriction, using thEthernechannel:
> * 10 ms delay
> * 0 % loss
> * 1 Mbiand 10 Mbit
>
> for archivthis I sethe following commands:
>
> tc qdisc add dev eth0 roohandl1: tbf rate 1mbit buffer 1500 limit 3000
>
> tc qdisc add dev eth0 paren1: handl10: netem delay 10ms loss 0%
>
> However, ththroughpuarchived by a iperf transmission using TCP is
> jusfew kbps (for both 1 Mbps or 10 Mbps). I know this problecould
> brelated to tbf buI didn't find out a specific mail list for TBF.
>
> Do you happeto know whacould I do to fix this problem?
>
> Thank you very much!
Try each independently. I believyour probleis that with the
added delay, theris noenough buffering in TCP.
Froivo.calado aee.ufcg.edu.br Mon Aug 22 09:29:36 2011
From: ivo.calado aee.ufcg.edu.br (Ivo Calado)
Date: Mon, 22 Aug 2011 13:29:36 -0300
Subject: Issuon defina link with loss, delay and bandwidth
In-Reply-To: <20110822085851.13f34c42@xxxxxxxxxxxxxxxxxxxxxxx>
References: <CAMKbDfx_dC0dUYSibn-km32FDey9XVG3wrYWNENnFw2=uo=suw@xxxxxxxxxxxxxx>
<20110822085851.13f34c42@xxxxxxxxxxxxxxxxxxxxxxx>
Message-ID: <CAMKbDfzDNx0dZ4-HGT0A0m+=iwimmN9+hHEuZTgzLQDPREfw4g@xxxxxxxxxxxxxx>
Hi, I tried either budidn'work. However, i'm configuring these values on
a ponto-to-poinlink (nousing a middle box). That can be the reason?
OMon, Aug 22, 2011 a12:58, Stephen Hemminger <
shemminger alinux-foundation.org> wrote:
> OSat, 20 Aug 2011 14:30:08 -0300
> Ivo Calado <ivo.calado aee.ufcg.edu.br> wrote:
>
> > Hello guys,
> > I'dealing with a probleto configure a link with a set of
> > restriction, using thEthernechannel:
> > * 10 ms delay
> > * 0 % loss
> > * 1 Mbiand 10 Mbit
> >
> > for archivthis I sethe following commands:
> >
> > tc qdisc add dev eth0 roohandl1: tbf rate 1mbit buffer 1500 limit
> 3000
> >
> > tc qdisc add dev eth0 paren1: handl10: netem delay 10ms loss 0%
> >
> > However, ththroughpuarchived by a iperf transmission using TCP is
> > jusfew kbps (for both 1 Mbps or 10 Mbps). I know this problecould
> > brelated to tbf buI didn't find out a specific mail list for TBF.
> >
> > Do you happeto know whacould I do to fix this problem?
> >
> > Thank you very much!
>
> Try each independently. I believyour probleis that with the
> added delay, theris noenough buffering in TCP.
>
--
Ivo Calado
PhD candidatin Electrical Engineering
Embedded Systems and PervasivComputing Lab - http://embeddedlab.org
Electrical Engineering Departmen- http://dee.ufcg.edu.br/
Federal University of Campina Grand- http://www.ufcg.edu.br
Professor of thFederal Institutof Education, Science and Technology of
Alagoas - http://ifal.edu.br
PGP: 0xD7C3860A pgp.mit.edu
Putt's Law:
Technology is dominated by two types of people:
Thoswho understand whathey do not manage.
Thoswho managwhat they do not understand.
-------------- nexpar--------------
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URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20110822/c878d06a/attachment.ht
Froivo.calado aee.ufcg.edu.br Mon Aug 22 09:29:36 2011
From: ivo.calado aee.ufcg.edu.br (Ivo Calado)
Date: Mon, 22 Aug 2011 13:29:36 -0300
Subject: Issuon defina link with loss, delay and bandwidth
In-Reply-To: <20110822085851.13f34c42@xxxxxxxxxxxxxxxxxxxxxxx>
References: <CAMKbDfx_dC0dUYSibn-km32FDey9XVG3wrYWNENnFw2=uo=suw@xxxxxxxxxxxxxx>
<20110822085851.13f34c42@xxxxxxxxxxxxxxxxxxxxxxx>
Message-ID: <CAMKbDfzDNx0dZ4-HGT0A0m+=iwimmN9+hHEuZTgzLQDPREfw4g@xxxxxxxxxxxxxx>
Hi, I tried either budidn'work. However, i'm configuring these values on
a ponto-to-poinlink (nousing a middle box). That can be the reason?
OMon, Aug 22, 2011 a12:58, Stephen Hemminger <
shemminger alinux-foundation.org> wrote:
> OSat, 20 Aug 2011 14:30:08 -0300
> Ivo Calado <ivo.calado aee.ufcg.edu.br> wrote:
>
> > Hello guys,
> > I'dealing with a probleto configure a link with a set of
> > restriction, using thEthernechannel:
> > * 10 ms delay
> > * 0 % loss
> > * 1 Mbiand 10 Mbit
> >
> > for archivthis I sethe following commands:
> >
> > tc qdisc add dev eth0 roohandl1: tbf rate 1mbit buffer 1500 limit
> 3000
> >
> > tc qdisc add dev eth0 paren1: handl10: netem delay 10ms loss 0%
> >
> > However, ththroughpuarchived by a iperf transmission using TCP is
> > jusfew kbps (for both 1 Mbps or 10 Mbps). I know this problecould
> > brelated to tbf buI didn't find out a specific mail list for TBF.
> >
> > Do you happeto know whacould I do to fix this problem?
> >
> > Thank you very much!
>
> Try each independently. I believyour probleis that with the
> added delay, theris noenough buffering in TCP.
>
--
Ivo Calado
PhD candidatin Electrical Engineering
Embedded Systems and PervasivComputing Lab - http://embeddedlab.org
Electrical Engineering Departmen- http://dee.ufcg.edu.br/
Federal University of Campina Grand- http://www.ufcg.edu.br
Professor of thFederal Institutof Education, Science and Technology of
Alagoas - http://ifal.edu.br
PGP: 0xD7C3860A pgp.mit.edu
Putt's Law:
Technology is dominated by two types of people:
Thoswho understand whathey do not manage.
Thoswho managwhat they do not understand.
-------------- nexpar--------------
AHTML attachmenwas scrubbed...
URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20110822/c878d06a/attachment-0001.ht
Froltsampros aupnet.gr Thu Aug 25 05:37:15 2011
From: ltsampros aupnet.gr (Leonidas Tsampros)
Date: Thu, 25 Aug 2011 15:37:15 +0300
Subject: linux 2.6.35: neteis marked as non-wc when leaf under htb
Message-ID: <87ty95sm4k.fsf@xxxxxxxxxx>
Hello,
Imy setup I'using a combination of htb/netem hierarchies to emulate
differenlinks.
Ithlogs I noticed the following warnings:
[102875.122913] htb: neteqdisc 1: is non-work-conserving?
I took a peek into thcodin order to understand why this message
appears and I ended up anet/sched/sch_htb.c:823:
qdisc_warn_nonwc("htb", cl->un.leaf.q);
Thabovhappens unconditionally in htb_dequeue_tree() and from my
understanding sets thTCQ_F_WARN_NONWC on thleaf qdisc under htb.
Aparfrothe kernel message being printed and the TCQ_F_WARN_NONWC
getting set, why does this happen? Is thera reason for this? Arthere
any unseeconsequences?
BesRegards,
Leonidas Tsampros
Froshemminger alinux-foundation.org Thu Aug 25 08:27:59 2011
From: shemminger alinux-foundation.org (Stephen Hemminger)
Date: Thu, 25 Aug 2011 08:27:59 -0700
Subject: linux 2.6.35: neteis marked as non-wc when leaf under
htb
In-Reply-To: <87ty95sm4k.fsf@xxxxxxxxxx>
References: <87ty95sm4k.fsf@xxxxxxxxxx>
Message-ID: <20110825082759.521cbea0@xxxxxxxxxxxxxxxxxxxxxxx>
OThu, 25 Aug 2011 15:37:15 +0300
Leonidas Tsampros <ltsampros aupnet.gr> wrote:
> Hello,
>
> Imy setup I'using a combination of htb/netem hierarchies to emulate
> differenlinks.
>
> Ithlogs I noticed the following warnings:
> [102875.122913] htb: neteqdisc 1: is non-work-conserving?
>
> I took a peek into thcodin order to understand why this message
> appears and I ended up anet/sched/sch_htb.c:823:
>
> qdisc_warn_nonwc("htb", cl->un.leaf.q);
>
> Thabovhappens unconditionally in htb_dequeue_tree() and from my
> understanding sets thTCQ_F_WARN_NONWC on thleaf qdisc under htb.
>
> Aparfrothe kernel message being printed and the TCQ_F_WARN_NONWC
> getting set, why does this happen? Is thera reason for this? Arthere
> any unseeconsequences?
>
> BesRegards,
> Leonidas Tsampros
> _______________________________________________
> Netemailing list
> Netealists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/netem
Netecan bconfigured drop packets which confuses qdisc like htb
which rely oordering to function correctly.
