netdev - Re: [PATCH net-next] net: dsa: hellcreek: Print warning only once

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Message-ID: <20220903164402.4gmxipv2iol37r4g@skbuf>
Date:   Sat, 3 Sep 2022 19:44:02 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Kurt Kanzenbach <kurt@...utronix.de>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: dsa: hellcreek: Print warning only once

On Sat, Sep 03, 2022 at 03:24:33PM +0200, Kurt Kanzenbach wrote:
> > Yes, some IP forwarding of 60 byte frames at line rate gigabit or higher
> > should do the trick. Testing with MTU sized packets is probably not
> > going to show much of a difference.
> 
> Well, I don't see much of a difference. However, running iperf3 with
> small packets is nowhere near line rate of 100Mbit/s.

Try something smarter than iperf3, like CONFIG_NET_PKTGEN=y on a link
partner as traffic generator. I had this command lying around, I forget
exactly what it does.

/root/git/net-next/samples/pktgen/pktgen_sample03_burst_single_flow.sh \
	-i eth1 -s 64 -m 00:04:9f:05:de:0a -d 20.0.0.2  -t 2 -f 13 -c 4 -p 400 -n 0 -b 4