From mboxrd@z Thu Jan  1 00:00:00 1970
From: Shlomo Pongratz <shlomop@mellanox.com>
Subject: RE: GRO aggregation
Date: Tue, 11 Sep 2012 18:41:49 +0000
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=46rom: Marcelo Ricardo Leitner [mleitner@redhat.com]
Sent: Tuesday, September 11, 2012 9:20 PM
To: Shlomo Pongratz
Cc: netdev@vger.kernel.org
Subject: Re: GRO aggregation

On 09/11/2012 10:45 AM, Shlomo Pongartz wrote:
> Hi,
>
> I=92m checking GRO aggregation with kernel 3.6.0-rc1+ using Intel ixg=
be
> driver.
> The mtu is 1500 and GRO is on and so are SG and RX checksum.
> I ran iperf with default setting and monitor the receiver with tcpdum=
p.
> The tcpdump shows that the maximal aggregation is 32120 which is 21 *=
 1500.
> In the transmitter side tcpdump shows that TSO works better (~64K).
> I did a capture without GRO enabled to see if there was a difference
> between any flag
> of any two consecutive packets that forced flushing but didn't find
> anything.
> Is the GRO aggregation can be tuned.

Hi Shlomo,

Have you tried tuning coalescing parameters?

Marcelo


Hi Marcelo

I didn't play with interrupts coalescing.
Do you suggest to increase the value?

Shlomo