netdev - Re: [PATCH] sky2: skb recycling

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Date:	Wed, 22 Oct 2008 16:58:17 -0700
From:	Rick Jones <rick.jones2@...com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	Eric Dumazet <dada1@...mosbay.com>,
	David Miller <davem@...emloft.net>, jgarzik@...ox.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH] sky2: skb recycling

Stephen Hemminger wrote:
> On Tue, 21 Oct 2008 22:15:43 +0200
> Eric Dumazet <dada1@...mosbay.com> wrote:
> 
> 
>>Rick Jones a écrit :
>>> I've not had a good emily litella moment all day so I'll ask - is
>>> there really that much in the way of suitable skb's which are
>>> completely free after transmit completion?
>>
>> Or, if we take another way, say a VOIP RTP machine sends and
>> receive 20.000 packets per second, each being 200 bytes long, are
>> transmited packets correctly sized at sendto() time to be
>> candidates for recycling ?
> 
> No. Most locally generate packets aren't going to be right size
> because they will be too small, cloned or fragmented.  It really only
> helps when forwarding.

So we have a bit of "tension" between the desires of an end host vs 
those of a router right?

rick jones
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