From: Thomas Monjalon <thomas@monjalon.net>
To: Shyam Shrivastav <shrivastav.shyam@gmail.com>,
Cristofer Martins <CristoferMartins@hotmail.com>
Cc: users@dpdk.org, Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [dpdk-users] General Questions
Date: Thu, 09 Apr 2020 22:58:12 +0200 [thread overview]
Message-ID: <2121009.ZfL8zNpBrT@thomas> (raw)
In-Reply-To: <20200409083236.08573753@hermes.lan>
09/04/2020 17:32, Stephen Hemminger:
> On Thu, 9 Apr 2020 20:57:19 +0530
> Shyam Shrivastav <shrivastav.shyam@gmail.com> wrote:
>
> > From my experience as dpdk user
> >
> > On Thu, Apr 9, 2020 at 11:41 AM Cristofer Martins <
> > CristoferMartins@hotmail.com> wrote:
> >
> > > Well the reason i thought about using dpdk(together with a user space tcp
> > > stack) is because my tcp code spend so much time with syscalls that
> > > removing that would allow better throughput and latency. Is this a valid
> > > reason? My software runs in single core(and most of time in cheap vps) so i
> > > want to extract the best i can from them.
> > >
> >
> > Yes using dpdk instead of getting packets from kernel stack increases
> > performance
> >
> >
> >
> > > The other question is, can dpdk runs alongside with the linux network
> > > stack? I want to use dpdk in my special app but i still want to have ssh
> > > and apps working as expected without any modification.
> > >
> > Interface used by dpdk is not available, at least another interface
> > required for management/access & other network apps
> >
> >
> >
> > >
> > > Thanks in advance.
> > >
>
> This might be a good use case for AF_XDP with or without DPDK
AF_XDP helps to use a device both with Linux stack and userland application.
This capability is what we call the bifurcated model.
The Mellanox drivers are also using a bifurcated model:
the same device can send some packet flows to the kernel interface,
and other (configured) packet flows to the DPDK interface.
prev parent reply other threads:[~2020-04-09 20:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-09 6:11 Cristofer Martins
2020-04-09 14:58 ` Stephen Hemminger
2020-04-09 15:27 ` Shyam Shrivastav
2020-04-09 15:32 ` Stephen Hemminger
2020-04-09 20:58 ` Thomas Monjalon [this message]
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