netdev - Re: [PATCH net-next] mlx4: optimize xmit path

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Message-ID: <CAJ3xEMiVXonPkJsve2UuWtTs2wqBnV_jrYMuJ1yvccBTeAFM2w@mail.gmail.com>
Date:	Sun, 28 Sep 2014 17:35:30 +0300
From:	Or Gerlitz <gerlitz.or@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Alexei Starovoitov <ast@...mgrid.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jesper Dangaard Brouer <brouer@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>,
	John Fastabend <john.r.fastabend@...el.com>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Amir Vadai <amirv@...lanox.com>,
	Or Gerlitz <or.gerlitz@...il.com>, saeedm@...lanox.com,
	Yevgeny Petrilin <yevgenyp@...lanox.com>, idos@...lanox.com
Subject: Re: [PATCH net-next] mlx4: optimize xmit path

On Sun, Sep 28, 2014 at 1:56 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> From: Eric Dumazet <edumazet@...gle.com>
>
> First I implemented skb->xmit_more support, and pktgen throughput
> went from ~5Mpps to ~10Mpps.
>
> Then, looking closely at this driver I found false sharing problems that
> should be addressed by this patch, as my pktgen now reaches 14.7 Mpps
> on a single TX queue, with a burst factor of 8.
>
> So this patch in a whole permits to improve raw performance on a single
> TX queue from about 5 Mpps to 14.7 Mpps.

Eric,

cool!! the team here will take a look this week. I assume we might
want to break the fifteen changes into multiple patches...

Thanks again for all your great work

Or.
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