DPDK usage discussions
 help / color / mirror / Atom feed
From: Marco Faltelli <marco.faltelli@uniroma2.it>
To: users@dpdk.org
Subject: [dpdk-users] Hardware Timestamping with Intel X710
Date: Tue, 7 Jul 2020 13:08:14 +0200
Message-ID: <CANNiY0EOoxhs-nxABkJNa6Bp4hDbgAf0B9osNBdjOOph3wgfNA@mail.gmail.com> (raw)

Hi all,
I'm running the l3fwd DPDK sample application and using Moongen's HW NIC
timestamp capabilities through this suite
<https://github.com/ztz1989/software-switches/tree/artifacts> for
benchmarking l3fwd's latency with 64B packets.
I'm running tests both with Intel X520 and X710 NICs.
While X520 NICs give me meaningful values (e.g. 8.5 us at 10Gbps, 7.86 us
at 5Gbps, 10 us at 1Gbps), Intel X710 show an unexpected increase when
running at line rate (16.45 us at 10Gbps), while at lower rates results are
quite similar as Intel X520 (7.42 us at 5Gbps, 8.24 us at 1Gbps). Even
playing with different parameters (such as DPDK's l3fwd minimum batch
transmit size) the problem still occurs.
Do you have any insight about Intel X710 timestamping and how this can
happen?
Thanks,
Marco

                 reply	other threads:[~2020-07-07 11:08 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=CANNiY0EOoxhs-nxABkJNa6Bp4hDbgAf0B9osNBdjOOph3wgfNA@mail.gmail.com \
    --to=marco.faltelli@uniroma2.it \
    --cc=users@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

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 \
		users@dpdk.org
	public-inbox-index users

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.users


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