All of lore.kernel.org
 help / color / mirror / Atom feed
From: Vladimir Oltean <vladimir.oltean@nxp.com>
To: "Clément Léger" <clement.leger@bootlin.com>
Cc: Jakub Kicinski <kuba@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Rob Herring <robh+dt@kernel.org>,
	Claudiu Manoil <claudiu.manoil@nxp.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	"UNGLinuxDriver@microchip.com" <UNGLinuxDriver@microchip.com>,
	Andrew Lunn <andrew@lunn.ch>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [PATCH v2 3/6] net: ocelot: pre-compute injection frame header content
Date: Mon, 15 Nov 2021 14:31:06 +0000	[thread overview]
Message-ID: <20211115143105.tmjviz7z7ckmlquk@skbuf> (raw)
In-Reply-To: <20211115150620.057674ae@fixe.home>

On Mon, Nov 15, 2021 at 03:06:20PM +0100, Clément Léger wrote:
> Le Mon, 15 Nov 2021 06:08:00 -0800,
> Jakub Kicinski <kuba@kernel.org> a écrit :
>
> > On Mon, 15 Nov 2021 11:13:44 +0100 Clément Léger wrote:
> > > Test on standard packets with UDP (iperf3 -t 100 -l 1460 -u -b 0 -c *)
> > > - With pre-computed header: UDP TX: 	33Mbit/s
> > > - Without UDP TX: 			31Mbit/s
> > > -> 6.5% improvement
> > >
> > > Test on small packets with UDP (iperf3 -t 100 -l 700 -u -b 0 -c *)
> > > - With pre-computed header: UDP TX: 	15.8Mbit/s
> > > - Without UDP TX: 			16.4Mbit/s
> > > -> 4.3% improvement
> >
> > Something's wrong with these numbers or I'm missing context.
> > You say improvement in both cases yet in the latter case the
> > new number is lower?
>
> You are right Jakub, I swapped the last two results,
>
> Test on small packets with UDP (iperf3 -t 100 -l 700 -u -b 0 -c *)
>  - With pre-computed header: UDP TX: 	16.4Mbit/s
>  - Without UDP TX: 			15.8Mbit/s
>  -> 4.3% improvement

Even in reverse, something still seems wrong with the numbers.
My DSPI controller can transfer at a higher data rate than that.
Where is the rest of the time spent? Computing checksums?

  reply	other threads:[~2021-11-15 14:33 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-03  9:19 [PATCH v2 0/6] Add FDMA support on ocelot switch driver Clément Léger
2021-11-03  9:19 ` [PATCH v2 1/6] net: ocelot: add support to get port mac from device-tree Clément Léger
2021-11-03 10:26   ` Vladimir Oltean
2021-11-15 11:19   ` Julian Wiedmann
2021-11-15 11:24     ` Clément Léger
2021-11-03  9:19 ` [PATCH v2 2/6] dt-bindings: net: convert mscc,vsc7514-switch bindings to yaml Clément Léger
2021-11-03 10:45   ` Vladimir Oltean
2021-11-08 11:13     ` Clément Léger
2021-11-12 20:06   ` Rob Herring
2021-11-03  9:19 ` [PATCH v2 3/6] net: ocelot: pre-compute injection frame header content Clément Léger
2021-11-03 12:38   ` Vladimir Oltean
2021-11-03 13:53     ` Clément Léger
2021-11-15 10:13       ` Clément Léger
2021-11-15 10:51         ` Vladimir Oltean
2021-11-15 10:58           ` Clément Léger
2021-11-15 14:08         ` Jakub Kicinski
2021-11-15 14:06           ` Clément Léger
2021-11-15 14:31             ` Vladimir Oltean [this message]
2021-11-15 16:03               ` Clément Léger
2021-11-03  9:19 ` [PATCH v2 4/6] net: ocelot: add support for ndo_change_mtu Clément Léger
2021-11-03 12:40   ` Vladimir Oltean
2021-11-03 13:07     ` Clément Léger
2021-11-03  9:19 ` [PATCH v2 5/6] net: ocelot: add FDMA support Clément Léger
2021-11-03 11:25   ` Denis Kirjanov
2021-11-03 12:31   ` Vladimir Oltean
2021-11-03 14:22     ` Clément Léger
2021-11-03  9:19 ` [PATCH v2 6/6] net: ocelot: add jumbo frame support for FDMA Clément Léger
2021-11-03 12:43   ` Vladimir Oltean
2021-11-03 14:30     ` Clément Léger
2021-11-03 10:46 ` [PATCH v2 0/6] Add FDMA support on ocelot switch driver Denis Kirjanov

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=20211115143105.tmjviz7z7ckmlquk@skbuf \
    --to=vladimir.oltean@nxp.com \
    --cc=UNGLinuxDriver@microchip.com \
    --cc=alexandre.belloni@bootlin.com \
    --cc=andrew@lunn.ch \
    --cc=claudiu.manoil@nxp.com \
    --cc=clement.leger@bootlin.com \
    --cc=davem@davemloft.net \
    --cc=devicetree@vger.kernel.org \
    --cc=kuba@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=robh+dt@kernel.org \
    --cc=thomas.petazzoni@bootlin.com \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.