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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Torsten Schmidt <torsten.schmidt@s2006.tu-chemnitz.de>
Cc: David Miller <davem@davemloft.net>, netdev@vger.kernel.org
Subject: Re: [PATCH] ipv4: add DiffServ priority based routing
Date: Thu, 14 Jan 2010 13:50:51 +0100	[thread overview]
Message-ID: <4B4F132B.7020001@gmail.com> (raw)
In-Reply-To: <201001141250.27287.schmto@hrz.tu-chemnitz.de>

Le 14/01/2010 12:50, Torsten Schmidt a écrit :
.
> Our company is more interested in IP DiffServ traffic accounting.
> So we simply need a fast mechanism which generates IP DiffServ traffic
> statistics, without setting the network interface in promiscuous mode,
> (which softflowd ore tcpdump does).

tcpdump can work in non promiscuous mode (-p). Anyway, switched networks makes
promiscuous a non issue nowaday.

> 
> So first idea was to implement a virtual file e.g. called /proc/net/ip_dscp.
> If the main line peoples are not interested in, i will no longer send these
> patches. 

Problem is, you might need many sets of counters...

1) General (for each net namespace ...)
2) Per interface
3) Per protocol ?

For performance reasons, SNMP counters are per cpu, so each set would be very large.

In any case, dont add yet another /proc/net file, this is considered as a hacky way to do
these things today.

Thanks

  reply	other threads:[~2010-01-14 12:50 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-12 13:32 [PATCH] ipv4: add DiffServ priority based routing Torsten Schmidt
2010-01-12 20:16 ` David Miller
2010-01-12 20:59   ` Philip A. Prindeville
2010-01-12 21:03     ` David Miller
2010-01-12 21:33       ` Philip A. Prindeville
2010-01-13  4:47         ` Steven Blake
2010-03-11 19:25       ` Philip A. Prindeville
2010-03-11 19:29         ` David Miller
2010-03-11 19:32           ` Philip A. Prindeville
2010-03-12 11:18           ` Benny Amorsen
2011-02-21  6:01             ` Philip Prindeville
2010-01-14 11:50   ` Torsten Schmidt
2010-01-14 12:50     ` Eric Dumazet [this message]
2010-01-15  0:51       ` David Miller
2010-01-15  8:24         ` Eric Dumazet
2010-01-15  8:26           ` David Miller

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