From: Paul Emmerich <emmericp@net.in.tum.de>
To: Luke Gorrie <luke@snabb.co>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] TX performance regression caused by the mbuf cachline split
Date: Mon, 11 May 2015 12:16:16 +0200 [thread overview]
Message-ID: <55508170.90606@net.in.tum.de> (raw)
In-Reply-To: <CAA2XHbfwbuFXi6NHMfttvS_pd7gKesVUMO5qek5S5SBE4KO_9w@mail.gmail.com>
Hi Luke,
thanks for your suggestion, I actually looked at how your packet
generator in SnabbSwitch works before and it's quite clever. But
unfortunately that's not what I'm looking for.
I'm looking for a generic solution that works with whatever NIC is
supported by DPDK and I don't want to write NIC-specific transmit logic.
I don't want to maintain, test, or debug drivers. That's why I chose
DPDK in the first place.
The DPDK drivers (used to) hit a sweet spot for the performance. I can
usually load about two 10 Gbit/s ports on a reasonably sized CPU core
without worrying about writing my own device drivers*. This allows for
packet generation at interesting packet rates on low-end servers (e.g.
servers with Xeon E3 1230 v2 CPUs and dual-port NICs). Servers with more
ports usually also have the necessary CPU power to handle it.
I also don't want to be limited to packet generation in the long run.
For example, I have a student who is working on an IPSec offloading
application and another student working on a proof-of-concept router.
Paul
*) yes, I still need some NIC-specific low-level code (timestamping) and
a small patch in the DPDK drivers (flag to disable CRC offloading on a
per-packet basis) for some features of my packet generator.
next prev parent reply other threads:[~2015-05-11 10:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-11 0:14 Paul Emmerich
2015-05-11 9:13 ` Luke Gorrie
2015-05-11 10:16 ` Paul Emmerich [this message]
2015-05-11 22:32 ` Paul Emmerich
2015-05-11 23:18 ` Paul Emmerich
2015-05-12 0:28 ` Marc Sune
2015-05-12 0:38 ` Marc Sune
2015-05-13 9:03 ` Ananyev, Konstantin
2016-02-15 19:15 ` Paul Emmerich
2016-02-19 12:31 ` Olivier MATZ
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