From: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
To: Tom Herbert <tom@herbertland.com>
Cc: Linux Kernel Network Developers <netdev@vger.kernel.org>,
Eric Dumazet <eric.dumazet@gmail.com>,
Stephen Hemminger <stephen@networkplumber.org>,
netdev-owner@vger.kernel.org
Subject: Re: [PATCH net-next v2] net: Add sysctl to toggle early demux for tcp and udp
Date: Thu, 09 Mar 2017 22:26:10 -0700 [thread overview]
Message-ID: <674d67f5d76f761f3e872dff274a8bda@codeaurora.org> (raw)
In-Reply-To: <CALx6S360Y3tmKMHVMUEuRKCskuwXi+9JBfce6WiSpko1sHj=Yg@mail.gmail.com>
On 2017-03-09 20:42, Tom Herbert wrote:
> On Thu, Mar 9, 2017 at 7:31 PM, Subash Abhinov Kasiviswanathan
> <subashab@codeaurora.org> wrote:
>> Certain system process significant unconnected UDP workload.
>> It would be preferrable to disable UDP early demux for those systems
>> and enable it for TCP only.
>>
> Presumably you want this for performance reasons. Can you provide some
> before and after numbers?
Hi Tom
We are working on UDPv6 performance issues seen on an Android ARM64
system.
Adding an early demux handler (link below) for it helped to increase
performance
(800Mbps -> 870Mbps). This helps because Android statistics rules do
multiple
socket lookup when no socket is associated with the skb.
https://www.mail-archive.com/netdev@vger.kernel.org/msg157003.html
Eric mentioned that server loads usually see more unconnected load and
he
preferred to turn off early demux for UDP, hence this patch. I don't
have numbers
for unconnected loads as of now though.
next prev parent reply other threads:[~2017-03-10 5:26 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-10 3:31 [PATCH net-next v2] net: Add sysctl to toggle early demux for tcp and udp Subash Abhinov Kasiviswanathan
2017-03-10 3:42 ` Tom Herbert
2017-03-10 5:26 ` Subash Abhinov Kasiviswanathan [this message]
2017-03-10 16:33 ` Tom Herbert
2017-03-11 0:22 ` Eric Dumazet
2017-03-11 0:49 ` Tom Herbert
2017-03-18 17:32 ` Subash Abhinov Kasiviswanathan
2017-03-18 17:44 ` Tom Herbert
2017-03-19 2:07 ` Subash Abhinov Kasiviswanathan
2017-03-19 19:18 ` Eric Dumazet
2017-03-21 22:49 ` Tom Herbert
2017-03-10 4:25 ` Eric Dumazet
2017-03-10 7:34 ` Subash Abhinov Kasiviswanathan
2017-03-10 12:42 ` kbuild test robot
2017-03-10 12:44 ` kbuild test robot
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