netdev - Re: [net-next 3/7] openvswitch: Enable memory mapped Netlink i/o

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Message-ID: <CAEP_g=-LONa8uayCHYJ-Yve6PvxHJo7otWaZ80oYWeDC1Mjqmg@mail.gmail.com>
Date:	Tue, 3 Dec 2013 21:45:02 -0800
From:	Jesse Gross <jesse@...ira.com>
To:	Thomas Graf <tgraf@...g.ch>
Cc:	David Miller <davem@...emloft.net>,
	"dev@...nvswitch.org" <dev@...nvswitch.org>,
	netdev <netdev@...r.kernel.org>,
	Daniel Borkmann <dborkman@...hat.com>, ffusco@...hat.com,
	fleitner@...hat.com, Eric Dumazet <eric.dumazet@...il.com>,
	Ben Hutchings <bhutchings@...arflare.com>
Subject: Re: [net-next 3/7] openvswitch: Enable memory mapped Netlink i/o

On Sat, Nov 30, 2013 at 4:21 AM, Thomas Graf <tgraf@...g.ch> wrote:
> Use memory mapped Netlink i/o for all unicast openvswitch
> communication if a ring has been set up.
>
> Benchmark
>   * pktgen -> ovs internal port
>   * 5M pkts, 5M flows
>   * 4 threads, 8 cores
>
> Before:
> Result: OK: 67418743(c67108212+d310530) usec, 5000000 (9000byte,0frags)
>   74163pps 5339Mb/sec (5339736000bps) errors: 0
>         +   2.98%     ovs-vswitchd  [k] copy_user_generic_string
>         +   2.49%     ovs-vswitchd  [k] memcpy
>         +   1.84%       kpktgend_2  [k] memcpy
>         +   1.81%       kpktgend_1  [k] memcpy
>         +   1.81%       kpktgend_3  [k] memcpy
>         +   1.78%       kpktgend_0  [k] memcpy
>
> After:
> Result: OK: 24229690(c24127165+d102524) usec, 5000000 (9000byte,0frags)
>   206358pps 14857Mb/sec (14857776000bps) errors: 0
>         +   2.80%     ovs-vswitchd  [k] memcpy
>         +   1.31%       kpktgend_2  [k] memcpy
>         +   1.23%       kpktgend_0  [k] memcpy
>         +   1.09%       kpktgend_1  [k] memcpy
>         +   1.04%       kpktgend_3  [k] memcpy
>         +   0.96%     ovs-vswitchd  [k] copy_user_generic_string
>
> Signed-off-by: Thomas Graf <tgraf@...g.ch>
> Reviewed-by: Daniel Borkmann <dborkman@...hat.com>

First three patches applied, thanks.
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