DPDK patches and discussions
 help / color / mirror / Atom feed
From: David Marchand <david.marchand@redhat.com>
To: Igor Russkikh <irusskikh@marvell.com>
Cc: dev <dev@dpdk.org>, Rasesh Mody <rmody@marvell.com>,
	 Devendra Singh Rawat <dsinghrawat@marvell.com>,
	Ferruh Yigit <ferruh.yigit@intel.com>,
	 Wenzhuo Lu <wenzhuo.lu@intel.com>,
	Beilei Xing <beilei.xing@intel.com>,
	 Bernard Iremonger <bernard.iremonger@intel.com>
Subject: Re: [dpdk-dev] [PATCH] app/testpmd: tx pkt clones parameter in flowgen
Date: Mon, 18 Jan 2021 09:32:07 +0100	[thread overview]
Message-ID: <CAJFAV8z1dhPk8B2oEREYSp8duwGLW3JyL-ZBdD4iEjOzfW1nGw@mail.gmail.com> (raw)
In-Reply-To: <20210116093859.3025-1-irusskikh@marvell.com>

On Sat, Jan 16, 2021 at 10:39 AM Igor Russkikh <irusskikh@marvell.com> wrote:
> When testing high performance numbers, it is often that CPU performance
> limits the max values device can reach (both in pps and in gbps)
> Here instead of recreating each packet separately, we use clones counter
> to resend the same mbuf to the line multiple times.
> PMDs handle that transparently due to reference counting inside of mbuf.
> Reaching max PPS on small packet sizes helps here:
> Some data from our 2 port x 50G device. Using 2*6 tx queues, 64b packets,
> PowerEdge R7525, AMD EPYC 7452:
> ./build/app/dpdk-testpmd -l 32-63  -- --forward-mode=flowgen \
>   --rxq=6 --txq=6  --disable-crc-strip --burst=512 \
>   --flowgen-clones=0 --txd=4096 --stats-period=1 --txpkts=64
> Gives ~46MPPS TX output:
>   Tx-pps:     22926849          Tx-bps:  11738590176
>   Tx-pps:     23642629          Tx-bps:  12105024112
> Setting flowgen-clones to 512 pushes TX almost to our device
> physical limit (68MPPS) using same 2*6 queues(cores):
>   Tx-pps:     34357556          Tx-bps:  17591073696
>   Tx-pps:     34353211          Tx-bps:  17588802640
> Doing similar measurements per core, I see one core can do
> 6.9MPPS (without clones) vs 11MPPS (with clones)
> Verified on Marvell qede and atlantic PMDs.

Ubuntu 18.04 gcc complains:

Can you have a look?

David Marchand

  reply	other threads:[~2021-01-18  8:32 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-16  9:38 Igor Russkikh
2021-01-18  8:32 ` David Marchand [this message]
2021-01-19 11:58   ` [dpdk-dev] [EXT] " Igor Russkikh

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=CAJFAV8z1dhPk8B2oEREYSp8duwGLW3JyL-ZBdD4iEjOzfW1nGw@mail.gmail.com \
    --to=david.marchand@redhat.com \
    --cc=beilei.xing@intel.com \
    --cc=bernard.iremonger@intel.com \
    --cc=dev@dpdk.org \
    --cc=dsinghrawat@marvell.com \
    --cc=ferruh.yigit@intel.com \
    --cc=irusskikh@marvell.com \
    --cc=rmody@marvell.com \
    --cc=wenzhuo.lu@intel.com \


* 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).