From: Stephen Hemminger <stephen@networkplumber•org>
To: David Miller <davem@davemloft•net>
Cc: gregkh@linuxfoundation•org, netdev@vger•kernel.org
Subject: Re: [RFC 1/2] netmap: infrastructure (in staging)
Date: Fri, 19 Apr 2013 13:16:32 -0700 [thread overview]
Message-ID: <20130419131632.31fce894@nehalam.linuxnetplumber.net> (raw)
In-Reply-To: <20130419.155859.1092595631804890737.davem@davemloft.net>
On Fri, 19 Apr 2013 15:58:59 -0400 (EDT)
David Miller <davem@davemloft•net> wrote:
> From: Greg KH <gregkh@linuxfoundation•org>
> Date: Fri, 19 Apr 2013 12:45:37 -0700
>
> > On Fri, Apr 19, 2013 at 12:06:51PM -0700, Stephen Hemminger wrote:
> >> Netmap is a framework for packet generation and capture from user
> >> space. It allows for efficient packet handling (up to line rate on
> >> 10Gb) with minimum system load. For more info see:
> >> http://info.iet.unipi.it/~luigi/netmap/
>
> So are you saying that people can't get line rate today?
>
> Even the the suricata folks are doing deep packet inspection at line
> rate using AF_PACKET fanouts just fine. That means they aren't just
> grabbing packets, they are actually processing them and making
> stateful decisions based upon the packet's contents.
>
> That means that capture is cheap enough already that they have all
> the compute left over that they need.
>
> The existing mechanisms also have the huge advantage that they are
> already implemented, require zero driver specific changes, and are
> already starting to be deployed to end users.
>
> Given that and how incredibly gross this code is right now, the only
> reaction I can have is "meh".
>
> If you are going to propose something, please show a real and genuine
> need.
I can not get line rate output with pktgen on existing kernels today.
I can get line rate easily with netmap.
next prev parent reply other threads:[~2013-04-19 20:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-19 19:06 [RFC 1/2] netmap: infrastructure (in staging) Stephen Hemminger
2013-04-19 19:09 ` [RFC 2/2] ixgbe: netmap support Stephen Hemminger
2013-04-19 19:45 ` [RFC 1/2] netmap: infrastructure (in staging) Greg KH
2013-04-19 19:58 ` David Miller
2013-04-19 20:16 ` Stephen Hemminger [this message]
2013-04-19 20:31 ` Eric Dumazet
2013-04-19 20:38 ` David Miller
2013-04-19 20:49 ` Stephen Hemminger
2013-04-19 20:53 ` David Miller
2013-05-07 17:20 ` chetan loke
2013-04-19 20:37 ` David Miller
2013-04-20 11:31 ` Daniel Borkmann
2013-04-20 14:57 ` Jamal Hadi Salim
2013-04-20 15:19 ` "Oleg A. Arkhangelsky"
2013-04-28 22:33 ` Willy Tarreau
2013-04-20 23:20 ` Vincent JARDIN
2013-04-23 7:04 ` Naoto MATSUMOTO
2013-04-23 7:10 ` David Miller
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