netdev - Re: [PATCH 1/2] net: Toeplitz library functions

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Message-ID: <1380044651.3165.109.camel@edumazet-glaptop>
Date:	Tue, 24 Sep 2013 10:44:11 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Rick Jones <rick.jones2@...com>
Cc:	Tom Herbert <therbert@...gle.com>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	David Miller <davem@...emloft.net>,
	Linux Netdev List <netdev@...r.kernel.org>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>
Subject: Re: [PATCH 1/2] net: Toeplitz library functions

On Tue, 2013-09-24 at 10:37 -0700, Rick Jones wrote:
> On 09/24/2013 10:34 AM, Eric Dumazet wrote:
> > If you have multiqueue NIC, you do not use RPS/RFS, so skb->rxhash might
> > be 0
> 
> If one has a CPU count >> the NIC queue count, mightn't one still want 
> to use RPS/RFS?

Maybe, but UDP stack should not assume anything.

By the way, there is a problem with RFS under stress, I am cooking a
patch to address this.


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