DPDK usage discussions
 help / color / mirror / Atom feed
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
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.


The VFIO is about isolation and if two processes are trying to
use the same group they are not isolated.

      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]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210520153449.1970527b@hermes.local \
    --to=stephen@networkplumber.org \
    --cc=sudhar.ckrishna@gmail.com \
    --cc=users@dpdk.org \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK usage discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/users/0 users/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 users users/ https://inbox.dpdk.org/users \
	public-inbox-index users

Example config snippet for mirrors.
Newsgroup available over NNTP:

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git