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

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Date:	Wed, 01 Oct 2014 22:08:39 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	ast@...mgrid.com
Cc:	edumazet@...gle.com, brouer@...hat.com, netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next] net: pktgen: packet bursting via
 skb->xmit_more

From: Alexei Starovoitov <ast@...mgrid.com>
Date: Tue, 30 Sep 2014 17:53:21 -0700

> 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>

Applied, great work.
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