netdev - Re: [PATCH] net: add ability to clear stats via ethtool

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Message-Id: <20080531004703.a081c18f.billfink@mindspring.com>
Date:	Sat, 31 May 2008 00:47:03 -0400
From:	Bill Fink <billfink@...dspring.com>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: add ability to clear stats via ethtool -
 e1000/pcnet32

On Fri, 30 May 2008, Stephen Hemminger wrote:

> On Fri, 30 May 2008 21:09:31 -0400
> Bill Fink <billfink@...dspring.com> wrote:
> 
> > On Fri, 30 May 2008, Rick Jones wrote:
> > 
> > > > Saving stats output and running beforeafter on a number of systems is
> > > > a royal pain when troubleshooting.
> > > 
> > > Well, with that ringing endorsement :) I would like to state that 
> > > Yoshihiro Ishijima has fixed some bugs in beforeafter and it will now 
> > > deal with /proc/interrupts output better than before.
> > > 
> > > ftp://ftp.cup.hp.com/dist/networking/tools/
> > 
> > Nothing against beforefter.  It's a very useful tool, especially
> > given Linux's lack of a method to clear interface counters.  But
> > it still is very cumbersome to use in the scenario I mentioned,
> > having to save the stats before and after a test on each of several
> > systems, and then having to run beforeafter on each of those systems.
> > Then you need to do this all again for every test run.  It's just
> > not very efficient.
> > 
> > I don't know why the major objection to adding a small amount of
> > code to the kernel that would make life a lot easier for hundreds
> > (or more) of Linux network adminstrators.  And the snapshot/diff
> > idea would not be complex to maintain and would also address the
> > issue of some hardware not having a clear hw stats capability.
> > 
> > 						-Bill
> 
> ifstat from iproute2 tools also keeps state to compute number
> of packets since last update as well. Come on, it isn't that
> hard.

Thanks for the pointer.  I wasn't aware of ifstat (it's not installed
by default on any of my systems).  I will check out ifstat and see what
it can do.

						-Thanks

						-Bill
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