Date: Sun, 9 Apr 2017 09:20:23 +0200 From: Vincenzo Maffione <v.maffione@gmail.com> To: Paras Jha <dreadiscool@gmail.com> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Netmap pipe zero-copy with NIC buffer? Message-ID: <CA%2B_eA9jRKDFJnCrOyNjQFK2FXPV3E6s=D7yA0w-5k4gTBDLqqA@mail.gmail.com> In-Reply-To: <CAMs8r4O6TmHnkoMJRTKV2LZ-BejCeyvj%2BWLvc8DJAfAUWxgscQ@mail.gmail.com> References: <CAMs8r4O6TmHnkoMJRTKV2LZ-BejCeyvj%2BWLvc8DJAfAUWxgscQ@mail.gmail.com>
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Hi,
Yes, when you nm_open("netmap:em3{2", ...), you're opening a netmap pipe
in the same netmap memory area as the one used by nm_open("netmap:em3",
...).
As a result, you can zero-copy packets from NIC rings to pipe rings.
What do you mean by "KB mode"?
Cheers,
Vincenzo
2017-04-08 19:56 GMT+02:00 Paras Jha <dreadiscool@gmail.com>:
> Hi all,
>
> Is it possible to have a netmap pipe share memory with a netmap port opened
> in KB mode for zero-copy purposes?
>
> All the best
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--
Vincenzo Maffione
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