netdev - Re: [PATCH net-next] mlx4: exploit skb->xmit_more to conditionally send doorbell

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Message-Id: <20140928.172749.1905950534641709827.davem@davemloft.net>
Date:	Sun, 28 Sep 2014 17:27:49 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, amirv@...lanox.com
Subject: Re: [PATCH net-next] mlx4: exploit skb->xmit_more to conditionally
 send doorbell

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 25 Sep 2014 07:17:49 -0700

> From: Eric Dumazet <edumazet@...gle.com>
> 
> skb->xmit_more tells us if another skb is coming next.
> 
> We need to send doorbell when : xmit_more is not set,
> or txqueue is stopped (preventing next skb to come immediately)
> 
> Tested with a modified pktgen version, I got a 40% increase of
> throughput.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied, thanks Eric.
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