netdev - Re: [PATCH] NET: Multiqueue network device support.

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Date:	Mon, 25 Jun 2007 13:47:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hadi@...erus.ca
Cc:	yi.zhu@...el.com, kaber@...sh.net, peter.p.waskiewicz.jr@...el.com,
	netdev@...r.kernel.org, jeff@...zik.org, auke-jan.h.kok@...el.com
Subject: Re: [PATCH] NET: Multiqueue network device support.

From: jamal <hadi@...erus.ca>
Date: Mon, 25 Jun 2007 12:47:31 -0400

> On Fri, 2007-22-06 at 09:26 +0800, Zhu Yi wrote:
> > We don't have THL and THH in our driver. They are what you suggested.
> > The queue wakeup number is 1/4 of the ring size.
> 
> So how did you pick 1/4? Experimentation? If you look at tg3 its much
> higher for example.

tg3 uses 1/4:

#define TG3_TX_WAKEUP_THRESH(tp)		((tp)->tx_pending / 4)

tp->tx_pending is the current configured ring size, configurable
via ethtool.
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