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From: Jeff Sipek <jeffpc@optonline.net>
To: vda@port.imtp.ilyichevsk.odessa.ua,
	Bernd Eckenfels <ecki-lkm@lina.inka.de>,
	linux-kernel@vger.kernel.org
Subject: Re: Net device byte statistics
Date: Fri, 25 Jul 2003 12:23:37 -0400	[thread overview]
Message-ID: <200307251223.51849.jeffpc@optonline.net> (raw)
In-Reply-To: <200307250654.h6P6s9j05200@Port.imtp.ilyichevsk.odessa.ua>

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On Friday 25 July 2003 03:03, Denis Vlasenko wrote:
> I sample the data every minute. Will need to do it much more often
> on 10ge ifaces, when those will appear at my home ;)

Speed			Time for one overflow

10Gbits/s	=> 3.436 seconds
1Gbit/s		=> 34.36 seconds
100Mbits/s	=> 343.6 seconds

> Or we will need 64bit counters then.

For anything up to (and including) 1GBit/s it is possible to do in easily in 
userspace, but then were are getting into an area where a program would have 
to check the files every 3 seconds (and a bit of load could delay it long 
enough for an overflow to happen.)

Jeff.

- -- 
FORTUNE PROVIDES QUESTIONS FOR THE GREAT ANSWERS: #19
A:      To be or not to be.
Q:      What is the square root of 4b^2?
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  parent reply	other threads:[~2003-07-25 16:08 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-24 23:56 Net device byte statistics Fredrik Tolf
2003-07-25  0:22 ` Bernd Eckenfels
2003-07-25  2:37   ` Fredrik Tolf
2003-07-25  3:26     ` Bernd Eckenfels
2003-07-25  3:49       ` Jeff Sipek
2003-07-25  3:54     ` Jeff Sipek
2003-07-25  7:03   ` Denis Vlasenko
2003-07-25  7:01     ` Andre Hedrick
2003-07-25 16:23     ` Jeff Sipek [this message]
2003-07-25 17:20       ` Randy.Dunlap
2003-07-25 17:55         ` Jeff Sipek
2003-07-25 17:58           ` Randy.Dunlap
2003-07-25 21:55             ` jw schultz
2003-07-25 22:51               ` Jeff Sipek
2003-07-26  0:08                 ` Ben Greear
2003-07-26  0:44                   ` jw schultz

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