netdev - Re: [PATCH 2/5] e1000e: Add interrupt moderation run-time ethtool interface

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Message-ID: <873apoutnt.fsf@basil.nowhere.org>
Date:	Mon, 14 Apr 2008 21:24:06 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Auke Kok <auke-jan.h.kok@...el.com>
Cc:	jeff@...zik.org, netdev@...r.kernel.org,
	e1000-devel@...ts.sourceforge.net
Subject: Re: [PATCH 2/5] e1000e: Add interrupt moderation run-time ethtool interface

Auke Kok <auke-jan.h.kok@...el.com> writes:

> The ethtool -c / -C interface can now be used to modify the
> irq moderation algorithm. This change does not require an
> adapter reset and can thus be used at all times. The adapter
> only supports changing/reading rx-usecs which has special
> values for 0, 1 and 3:
>
> 0 - no irq moderation whatsoever
> 1 - normal moderation favoring regular mixed traffic (default)
> 3 - best attempt at low latency possible at cost of CPU

It would be nice if ethtool instead of having this as a obscure magic
number had a higher level "--low-latency" or similar parameter
(that could also potentially set similar settings on other NICs)

You think there would be a clean way to implement this? 

-Andi
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