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From: Tom Herbert <tom@herbertland.com>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Jiri Benc <jbenc@redhat.com>, Netdev <netdev@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: GSO with udp_tunnel_xmit_skb
Date: Fri, 6 Nov 2015 16:19:20 +0900	[thread overview]
Message-ID: <CALx6S379Ma+u1rKCwyDWEHDZpQUjr9mB_YQ4=iySo9Lgga2PaQ@mail.gmail.com> (raw)
In-Reply-To: <CAHmME9pphqXyV_+LFQ6TTi4MjFB2Mopss6QQuT3YJQzvgtib2Q@mail.gmail.com>

On Thu, Nov 5, 2015 at 7:52 PM, Jason A. Donenfeld <Jason@zx2c4.com> wrote:
> Hi folks,
>
> When sending arbitrary SKBs with udp_tunnel_xmit_skb, the networking
> stack does not appear to be utilizing UFO on the outgoing UDP packets,
> which significantly caps the transmission speed. I see about 50% CPU
> usage in this send path, triggered for every single outgoing packet.
> Is there a particular skb option I need to set to enable this? I read
> Tom's patch [1] from last year, but this seems to be about setting the
> inner packet type. In my case, the inner type is opaque encrypted
> data, so there's not a relevant setting.
>
Jason,

Is this about UFO or GSO (in email subject)? UFO should operate
independently encapsulation or inner packet setting.

Tom

> Thanks,
> Jason
>
> [1] http://thread.gmane.org/gmane.linux.network/332194
> --
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  reply	other threads:[~2015-11-06  7:19 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-05 10:52 GSO with udp_tunnel_xmit_skb Jason A. Donenfeld
2015-11-06  7:19 ` Tom Herbert [this message]
2015-11-06 11:48   ` Jason A. Donenfeld
2015-11-07 17:19     ` Maciej Żenczykowski
2015-11-07 22:39       ` Jason A. Donenfeld
2015-11-07 23:40         ` Maciej Żenczykowski
2015-11-08 10:36           ` Jason A. Donenfeld
2015-11-08 10:57             ` Herbert Xu
2015-11-08 14:57               ` Jason A. Donenfeld
2015-11-09  1:40                 ` Herbert Xu
2015-11-09  2:23                   ` Jason A. Donenfeld
2015-11-09  3:18                     ` Maciej Żenczykowski

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