Linux network development

Thomas Graf | 1 Nov 2005 15:13

[PKT_SCHED]: Rework QoS and/or fair queueing configuration


Make "QoS and/or fair queueing" have its own menu, it's too big to be
inlined into "Network options". Remove the obsolete NET_QOS option.
Automatically select NET_CLS if needed. Do the same for NET_ESTIMATOR
but allow it to be selected manually for statistical purposes. Add
comments to separate queueing from classification. Fix dependencies
and ordering of classifiers. Improve descriptions/help texts and
remove outdated pieces.

Signed-off-by: Thomas Graf <tgraf <at> suug.ch>

Index: linux-2.6/net/sched/Kconfig
===================================================================
--- linux-2.6.orig/net/sched/Kconfig
+++ linux-2.6/net/sched/Kconfig
 <at>  <at>  -2,13 +2,15  <at>  <at> 
 # Traffic control configuration.
 # 

-menuconfig NET_SCHED
+menu "QoS and/or fair queueing"
+
+config NET_SCHED
 	bool "QoS and/or fair queueing"
 	---help---
 	  When the kernel has several packets to send out over a network
 	  device, it has to decide which ones to send first, which ones to
-	  delay, and which ones to drop. This is the job of the packet
-	  scheduler, and several different algorithms for how to do this
+	  delay, and which ones to drop. This is the job of the queueing

(Continue reading)

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Arnaldo Carvalho de Melo | 3 Nov 2005 05:25

Re: [PKT_SCHED]: Rework QoS and/or fair queueing configuration

On 11/1/05, Thomas Graf <tgraf <at> suug.ch> wrote:
>
> Make "QoS and/or fair queueing" have its own menu, it's too big to be
> inlined into "Network options". Remove the obsolete NET_QOS option.
> Automatically select NET_CLS if needed. Do the same for NET_ESTIMATOR
> but allow it to be selected manually for statistical purposes. Add
> comments to separate queueing from classification. Fix dependencies
> and ordering of classifiers. Improve descriptions/help texts and
> remove outdated pieces.
>
> Signed-off-by: Thomas Graf <tgraf <at> suug.ch>

Thanks, applied.

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Ian McDonald | 1 Nov 2005 20:54

Re: [PKT_SCHED]: Rework QoS and/or fair queueing configuration

On 02/11/05, Thomas Graf <tgraf <at> suug.ch> wrote:
>
> Make "QoS and/or fair queueing" have its own menu, it's too big to be
> inlined into "Network options". Remove the obsolete NET_QOS option.
> Automatically select NET_CLS if needed. Do the same for NET_ESTIMATOR
> but allow it to be selected manually for statistical purposes. Add
> comments to separate queueing from classification. Fix dependencies
> and ordering of classifiers. Improve descriptions/help texts and
> remove outdated pieces.
>
Thomas I think the timing ones can be improved slightly out of the
discussion at here:
http://marc.theaimsgroup.com/?l=linux-netdev&m=112912015311659&w=2

I keep meaning to submit a patch but low on my todo list. Feel free to
do so if you wish or else I will get around to it one day. I know
Arnaldo has also mentioned ktimers for the future (which I haven't yet
read) which may help in this area as well.

Ian
--
Ian McDonald
http://wand.net.nz/~iam4
WAND Network Research Group
University of Waikato
New Zealand

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Patrick McHardy | 1 Nov 2005 22:47

Re: [PKT_SCHED]: Rework QoS and/or fair queueing configuration

Ian McDonald wrote:
> I keep meaning to submit a patch but low on my todo list. Feel free to
> do so if you wish or else I will get around to it one day. I know
> Arnaldo has also mentioned ktimers for the future (which I haven't yet
> read) which may help in this area as well.

AFAIK ktimers are another timer subsystem, but don't provide any
further clock sources. Having higher resolution timers would be
great however for improving accuracy when a qdisc is throttled.