From: Stephen Hemminger <stephen@networkplumber.org>
To: Sudharshan Krishnakumar <sudhar.ckrishna@gmail.com>
Cc: users@dpdk.org
Subject: Re: [dpdk-users] access to different ports on the same NIC by 2 DPDK applications
Date: Thu, 20 May 2021 15:34:49 -0700 [thread overview]
Message-ID: <20210520153449.1970527b@hermes.local> (raw)
In-Reply-To: <CAEm3rUnWPxkz7OsCx2-_NkAYYq5eGthFQX2WmffmVG9+Dbu_fA@mail.gmail.com>
On Thu, 20 May 2021 14:19:13 -0700
Sudharshan Krishnakumar <sudhar.ckrishna@gmail.com> wrote:
> Thanks for your inputs. So, does this mean, when ports are bound to VFIO
> driver(which uses IOMMU), we can
> run 2 DPDK apps concurrently, only if the 2 apps are accessing ports on 2
> different Network cards.
> In other words, when ports are bound to VFIO driver, if 2 DPDK apps are
> running concurrently on the same system,
> then we need 2 Network cards installed on that system.
> So, I am guessing with 2 Network cards, under /dev, they would enumerate as
> 2 distinct paths, for example-> /dev/vfio/1 and /dev/vfio/2.
> Is this a correct understanding, please let me know.
Groups are explained here.
https://www.kernel.org/doc/Documentation/vfio.txt
The VFIO is about isolation and if two processes are trying to
use the same group they are not isolated.
prev parent reply other threads:[~2021-05-20 22:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-20 20:34 Sudharshan Krishnakumar
2021-05-20 20:54 ` Stephen Hemminger
2021-05-20 21:19 ` Sudharshan Krishnakumar
2021-05-20 22:34 ` Stephen Hemminger [this message]
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