netdev - Re: [Bugme-new] [Bug 10600] New: e1000 updates rx

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Date:	Mon, 05 May 2008 18:17:04 -0700
From:	"Michael Chan" <mchan@...adcom.com>
To:	"Ben Liblit" <liblit@....org>
cc:	"David Miller" <davem@...emloft.net>, akpm@...ux-foundation.org,
	netdev <netdev@...r.kernel.org>,
	bugme-daemon@...zilla.kernel.org, jesse.brandeburg@...el.com,
	john.ronciak@...el.com
Subject: Re: [Bugme-new] [Bug 10600] New: e1000 updates rx_bytes
 infrequently

On Mon, 2008-05-05 at 18:55 -0500, Ben Liblit wrote:
> Perhaps userspace needs a way to tweak the update frequency?  Or perhaps 
> the driver needs a way to tell userspace what update frequency it should 
> expect?  Without some kind of coordination, we have the present silly 
> situation: userspace network activity monitors are checking rx_bytes 
> more frequently than could possibly be useful.
> 
> Do different Ethernet drivers update rx_bytes at the same rate?  Or is 
> this completely ad hoc?

"ethtool -C eth0 stats-block-usecs" can be used to control statistics
update frequency on most tg3 and bnx2 devices.  The default is 1 second
on these devices.

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