netdev - Re: TSQ accounting skb->truesize degrades throughput for large packets

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Message-ID: <1378486840.31445.36.camel@edumazet-glaptop>
Date:	Fri, 06 Sep 2013 10:00:40 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Zoltan Kiss <zoltan.kiss@...rix.com>
Cc:	Wei Liu <wei.liu2@...rix.com>,
	Jonathan Davies <Jonathan.Davies@...citrix.com>,
	Ian Campbell <ian.campbell@...rix.com>, netdev@...r.kernel.org,
	xen-devel@...ts.xenproject.org
Subject: Re: TSQ accounting skb->truesize degrades throughput for large
 packets

On Fri, 2013-09-06 at 17:36 +0100, Zoltan Kiss wrote:

> So I guess it would be good to revisit the default value of this 
> setting.

If ixgbe requires 3 TSO packets in TX ring to get line rate, you also
can tweak dev->gso_max_size from 65535 to 64000.



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