netdev - Re: [PATCH v2 net-next] net: pktgen: packet bursting via skb->xmit

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Message-ID: <1412128632.16704.23.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Tue, 30 Sep 2014 18:57:12 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Alexei Starovoitov <ast@...mgrid.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jesper Dangaard Brouer <brouer@...hat.com>,
	netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next] net: pktgen: packet bursting via
 skb->xmit_more

On Tue, 2014-09-30 at 17:53 -0700, Alexei Starovoitov wrote:
> This patch demonstrates the effect of delaying update of HW tailptr.
> (based on earlier patch by Jesper)
> 
> burst=1 is the default. It sends one packet with xmit_more=false
> burst=2 sends one packet with xmit_more=true and
>         2nd copy of the same packet with xmit_more=false
> burst=3 sends two copies of the same packet with xmit_more=true and
>         3rd copy with xmit_more=false
> 
> Performance with ixgbe (usec 30):
> burst=1  tx:9.2 Mpps
> burst=2  tx:13.5 Mpps
> burst=3  tx:14.5 Mpps full 10G line rate
> 
> Signed-off-by: Alexei Starovoitov <ast@...mgrid.com>
> ---

Very good, thanks Alexei

Signed-off-by: Eric Dumazet <edumazet@...gle.com>


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