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Message-ID: <3CFD9B9C.1050906@candelatech.com>
Date: Tue, 04 Jun 2002 22:03:24 -0700
From: Ben Greear <greearb@candelatech.com>
Organization: Candela Technologies Inc
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To: Chris Friesen <cfriesen@nortelnetworks.com>
CC: linux-kernel@vger.kernel.org
Subject: Re: packets being dropped in IP stack but no error counts incrementing?
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I am not sure the UDP drop counters are available.  If you do
find them, I'm interested in them too!

Chris Friesen wrote:

> I've been doing some testing on 2.4.18 and I'm seeing an interesting problem.
> 
> I have a test tool that simulates bursty UDP traffic by sending a bunch of
> messages and then delaying a while.   If I leave the receiving udp socket at its
> normal size, then I can get a significant number of messages just vanishing
> between the ethernet driver and the userspace socket.  The driver rx count shows
> that all packets were received, but the userspace program doesn't get all of
> them.  netstat/ifconfig/iproute2 rx dropped counts do not increase.
> 
> Is this design intent, are we messing a counter increment when dropping packets,
> or am I not looking at the right counter for these numbers?
> 
> Thanks,
> 
> Chris
> 
> 


-- 
Ben Greear <greearb@candelatech.com>          <Ben_Greear@excite.com>
President of Candela Technologies Inc      http://www.candelatech.com
ScryMUD:  http://scry.wanfear.com     http://scry.wanfear.com/~greear

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