Date: Sat, 22 Feb 2014 09:03:17 +0800 From: jerry <jerry.lilijun@huawei.com> To: Luigi Rizzo <rizzo@iet.unipi.it>, <netdev@vger.kernel.org>, "freebsd-net@freebsd.org" <net@freebsd.org> Subject: Re: netmap, VALE and netmap pipes Message-ID: <5307F755.4090303@huawei.com> In-Reply-To: <CA%2BhQ2%2Bgbs9aBneUaDGAnKVoPHspzc=5o%2Bh%2Bf_K=T%2BCy8sRxr%2Bw@mail.gmail.com> References: <CA%2BhQ2%2Bgbs9aBneUaDGAnKVoPHspzc=5o%2Bh%2Bf_K=T%2BCy8sRxr%2Bw@mail.gmail.com>
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Hi Luigi,
How to use netmap pipe by pkt-gen commands?
I have tried the commands as follows:
./pkt-gen -i netmap:pipename{1 -f tx
./pkt-gen -i netmap:pipename}1 -f rx (in another terminal)
But it works failed.
Should the pipename be replaced with a invalid NIC name such as "eth3" in netmap mode?
The netmap pipe works from software ring to software ring independently with NICs, I understand. Is that right?
B.R.
Jerry
On 2014/2/17 18:11, Luigi Rizzo wrote:
> Hi,
> we have recently made a few extensions to netmap/VALE and put various
> pieces of code on public repositories, so i thought i'd share the
> pointers. All the code below runs with equal features and performance
> on FreeBSD and Linux, and we are trying to upstream it in the relevant
> projects if possible (as an example, QEMU recently added a netmap backend),
> at which point some of these clone repositories will become unnecessary.
>
> See http://info.iet.unipi.it/~luigi/netmap for more details.
>
> https://code.google.com/p/netmap/
> The latest netmap code for FreeBSD/Linux. It has native support
> for certain NICs; emulated netmap over unmodified drivers;
> enhanced parallelism in the VALE switch (20 Mpps/source, scaling
> up to ~50Mpps); and a new feature called "netmap pipe" that
> does zero-copy blocking I/O at over 100 Mpps.
> Other features are the ability to allocate tons of extra
> netmap buffers, and configurable sharing of memory among NICs,
> VALE ports and netmap pipes. This increases the opportunity for
> zero copy operation.
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