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From: =?UTF-8?Q?Olivier_Cochard=2DLabb=C3=A9?= <olivier@freebsd.org>
Date: Fri, 17 Mar 2017 23:35:29 +0100
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Subject: Re: Are ./valte-ctl and ./bridge friends or competitors?
To: Vincenzo Maffione <v.maffione@gmail.com>
Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
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On Fri, Mar 17, 2017 at 6:51 PM, Vincenzo Maffione <v.maffione@gmail.com>
wrote:

>
> When using your physical NICs with netmap, you need to disable the
> offloadings because netmap is not able to program the NIC to perform thes=
e
> offloadings. This is a design decision that has been taken to preserve
> simplicity and efficiency.
>

=E2=80=8BHi,

What do you mean by efficiency ?
For the netmap's pkt-gen tool, the option of using range for source or
destination IP address has some big impact because the software checksum
calculation.
Hopefully the Chelsio drivers allow to re-enable checksum offloading=E2=80=
=8B in
netmap mode: This is mandatory for reaching 10G line-rate with pkt-gen
(with the range option).

Regards,

Olivier