netdev - Re: [RFC] net: ipv4 -- Introduce ifa limit per net

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Message-ID: <20160309165128.GK2207@uranus.lan>
Date:	Wed, 9 Mar 2016 19:51:28 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, solar@...nwall.com, vvs@...tuozzo.com,
	avagin@...tuozzo.com, xemul@...tuozzo.com, vdavydov@...tuozzo.com,
	khorenko@...tuozzo.com
Subject: Re: [RFC] net: ipv4 -- Introduce ifa limit per net

On Wed, Mar 09, 2016 at 07:39:19PM +0300, Cyrill Gorcunov wrote:
> On Sun, Mar 06, 2016 at 08:06:41PM +0300, Cyrill Gorcunov wrote:
> > > 
> > > Well, this looks like LOCKDEP kernel. Are you really running LOCKDEP on
> > > production kernels ?
> > 
> 
> Hi Eric, David. Sorry for the delay. Finally I've measured the
> latency on the hw. It's i7-2600 cpu with 16G of memory. Here
> are the collected data.
...
> 
> 
> Also here is a graph for the data collected (blue line: unpatched
> version, red -- patched. Of course with patched version it become
> a way more better but still hanging).
> 
> https://docs.google.com/spreadsheets/d/1eyQDxjuZY2DHKYksGACpHDDcV1Bd92e-ZiY8ywPKshA/edit?usp=sharing
> 
> The perf output earlier shows the "perf top" when addresses
> are created and when they are releasing.

In text form
-------------
Num of addresses	Unpatched (sec)		Patched (sec)
4			1			1
2704			5			5
10404			20			20
23104			45			42
40804			83			74
63504			139			113