netdev - Re: [PATCH] sky2: skb recycling

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Message-ID: <48FE386F.8090706@cosmosbay.com>
Date:	Tue, 21 Oct 2008 22:15:43 +0200
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Rick Jones <rick.jones2@...com>
Cc:	shemminger@...tta.com, David Miller <davem@...emloft.net>,
	jgarzik@...ox.com, netdev@...r.kernel.org
Subject: Re: [PATCH] sky2: skb recycling

Rick Jones a écrit :
> David Miller wrote:
>> From: Stephen Hemminger <shemminger@...tta.com>
>> Date: Mon, 20 Oct 2008 19:09:22 -0700
>>
>>
>>> Add support for recycling tx buffers into receive buffers.
>>> This is experimental at this point.
>>>
>>> Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
>>
>>
>> Experimental, but do you have any performance data at all?
>> Just curious...
> 
> 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 ?





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