Re: GRO aggregation

On 09/12/2012 09:34 AM, Shlomo Pongartz wrote:

On 9/12/2012 7:23 PM, Rick Jones wrote:

quoted

On 09/12/2012 07:41 AM, Shlomo Pongartz wrote:

quoted

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

Hi Rick.

What I say is that I use TSO on the machine that transmits so I'll have
a burst of frames on the wire for the NAPI on the receiver machine.

Also, NAPI was in place before GRO.  IIRC, the napi code was simply a 
convenient/correct/natural place to have the GRO functionality.

rick jones