netdev - Re: [PATCH net-next] net: introduce netdevice gso_min

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Message-ID: <1412597876.11091.59.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Mon, 06 Oct 2014 05:17:56 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Amir Vadai <amirv@...lanox.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
	Yevgeny Petrilin <yevgenyp@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Ido Shamay <idos@...lanox.com>
Subject: Re: [PATCH net-next] net: introduce netdevice gso_min_segs attribute

On Mon, 2014-10-06 at 09:41 +0300, Amir Vadai wrote:
> On 10/5/2014 8:11 PM, Eric Dumazet wrote:
> > From: Eric Dumazet <edumazet@...gle.com>
> > 
> > Some TSO engines might have a too heavy setup cost, that impacts
> > performance on hosts sending small bursts (2 MSS per packet).
> > 
> > This patch adds a device gso_min_segs, allowing drivers to set
> > a minimum segment size for TSO packets, according to the NIC
> > performance.
> > 
> > Tested on a mlx4 NIC, this allows to get a ~110% increase of
> > throughput when sending 2 MSS per packet.
> > 
> 
> Amazing!
> 
> Shouldn't there be a netif_set_gso_min_size() too?

Good point, I'll add it in v2, thanks !


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