netdev - Re: [PATCH] IP: Increment INADDRERRORS if routing for a packet is not successful

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Date:	Wed, 02 Jun 2010 18:33:59 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	shemminger@...tta.com
Subject: Re: [PATCH] IP: Increment INADDRERRORS if routing for a packet is
 not successful

Le mercredi 02 juin 2010 à 11:27 -0500, Christoph Lameter a écrit :
> On Wed, 2 Jun 2010, David Miller wrote:
> 
> > From: Christoph Lameter <cl@...ux-foundation.org>
> > Date: Wed, 2 Jun 2010 11:12:14 -0500 (CDT)
> >
> > > Its important to know why drops occur (any drops for that matter, drops
> > > mean retransmit which means latency).
> >
> > We know, that's why there is a networking tracepoint that allows you
> > to see where all drops occur. :-)
> 
> Where can I find out more about the network tracepoint?
> 

take a look at 

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/html/SystemTap_Beginners_Guide/useful-systemtap-scripts.html#dropwatch



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