From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Ciara Loftus <ciara.loftus@intel.com>, dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH RFC 0/1] net/af_xdp: shared UMEM support
Date: Tue, 25 Aug 2020 13:14:58 +0100 [thread overview]
Message-ID: <10c12fcc-c82a-393b-1493-2b093d4ed42a@intel.com> (raw)
In-Reply-To: <20200811095017.2682-1-ciara.loftus@intel.com>
On 8/11/2020 10:50 AM, Ciara Loftus wrote:
> This RFC integrates shared UMEM support into the AF_XDP PMD. It is based on the
> WIP kernel series [1] by Magnus Karlsson.
>
> Detailed information on the shared UMEM feature can be found in the final patch
> in the aforementioned series.
>
> Support for the kernel feature can eventually be detected in DPDK by querying
> the LINUX_KERNEL_VERSION. As of now the feature is not yet merged upstream, so
> for this RFC it is assumed the user is using a patched version of v5.8.
Hi Ciara,
I don't see this feature in kernel in 5.9.0-rc2, is there any update in the
kernel side?
>
> Shared UMEM is only available for zero copy mode.
>
> In order to share UMEM information between PMDs, the ethdevs wishing to share
> must be tracked somehow. The method chosen to do so is similar to methods used
> in the vHost [2] and vDPA drivers, where pointers to the ethdevs are maintained
> in an internal list. Proposals for alternate solutions are welcome.
>
> Performance data to follow with the v1.
>
> [1] https://patchwork.ozlabs.org/project/netdev/cover/1595307848-20719-1-git-send-email-magnus.karlsson@intel.com/
> [2] https://git.dpdk.org/dpdk/commit/?id=ee584e9710b9abd60ee9faef664e106dcea10085
>
> Ciara Loftus (1):
> net/af_xdp: shared UMEM support
>
> doc/guides/nics/af_xdp.rst | 5 +-
> drivers/net/af_xdp/rte_eth_af_xdp.c | 315 ++++++++++++++++++++++------
> 2 files changed, 252 insertions(+), 68 deletions(-)
>
next prev parent reply other threads:[~2020-08-25 12:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-11 9:50 Ciara Loftus
2020-08-11 9:50 ` [dpdk-dev] [PATCH RFC 1/1] " Ciara Loftus
2020-08-25 14:09 ` Ferruh Yigit
2020-08-26 8:37 ` Loftus, Ciara
2020-08-25 12:14 ` Ferruh Yigit [this message]
2020-08-26 7:45 ` [dpdk-dev] [PATCH RFC 0/1] " Loftus, Ciara
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:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=10c12fcc-c82a-393b-1493-2b093d4ed42a@intel.com \
--to=ferruh.yigit@intel.com \
--cc=ciara.loftus@intel.com \
--cc=dev@dpdk.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).