netdev - Re: GRO aggregation

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Message-ID: <5050B6FF.5050002@hp.com>
Date:	Wed, 12 Sep 2012 09:23:27 -0700
From:	Rick Jones <rick.jones2@...com>
To:	Shlomo Pongartz <shlomop@...lanox.com>
CC:	Eric Dumazet <eric.dumazet@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: GRO aggregation

On 09/12/2012 07:41 AM, Shlomo Pongartz wrote:
> Hi Eric
>
> The TSO is just a mean to create a burst of frames on the wire so the
> NAPI will be able to pool as much as possible.

Is it?  If I recall correctly, TSO was in place well before all drivers 
were using NAPI.  And NAPI was being proposed independent of TSO. TSO is 
there to save CPU cycles on the transmit side.  "On the wire" what it 
sends is to be identical to what a host with greater CPU performance 
could accomplish.

rick jones
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