From: Benjamin LaHaise <bcrl@lhnet.ca>
To: Ben Greear <greearb@candelatech.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
Octavian Purdila <opurdila@ixiacom.com>,
netdev@vger.kernel.org, Cosmin Ratiu <cratiu@ixiacom.com>
Subject: Re: [PATCH] net: allow netdev_wait_allrefs() to run faster
Date: Mon, 9 Aug 2010 13:48:56 -0400 [thread overview]
Message-ID: <20100809174856.GS30010@kvack.org> (raw)
In-Reply-To: <4C603E6E.1060309@candelatech.com>
On Mon, Aug 09, 2010 at 10:44:14AM -0700, Ben Greear wrote:
> We also have a few rules per interface, and notice that it takes around 10ms
> per rule when we are removing them, even when using batching in 'ip':
...
> Patrick thought had an idea, but I don't think he had time to
> look at it further:
>
> "Its probably the synchronize_rcu() in fib_nl_delrule() and
> the route flushing happening after rule removal."
Yes, that would be a problem, but the issue is deeper than that -- if I'm
not mistaken it's on the packet processing path that iptables doesn't scale
for 100k interfaces with 1 rule per interface. It's been a while since I
ran the tests, but I don't think it's changed much.
-ben
next prev parent reply other threads:[~2010-08-09 17:48 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-17 22:18 [PATCH/RFC] make unregister_netdev() delete more than 4 interfaces per second Benjamin LaHaise
2009-10-18 4:26 ` Eric Dumazet
2009-10-18 16:13 ` Benjamin LaHaise
2009-10-18 17:51 ` Eric Dumazet
2009-10-18 18:21 ` Benjamin LaHaise
2009-10-18 19:36 ` Eric Dumazet
2009-10-21 12:39 ` Octavian Purdila
2009-10-21 15:40 ` [PATCH] net: allow netdev_wait_allrefs() to run faster Eric Dumazet
2009-10-21 16:09 ` Eric Dumazet
2009-10-21 16:51 ` Benjamin LaHaise
2009-10-21 19:54 ` Eric Dumazet
2009-10-29 23:07 ` Eric W. Biederman
2009-10-29 23:38 ` Benjamin LaHaise
2009-10-30 1:45 ` Eric W. Biederman
2009-10-30 14:35 ` Benjamin LaHaise
2009-10-30 14:43 ` Eric Dumazet
2009-10-30 23:25 ` Eric W. Biederman
2009-10-30 23:53 ` Benjamin LaHaise
2009-10-31 0:37 ` Eric W. Biederman
2010-08-09 17:23 ` Ben Greear
2010-08-09 17:34 ` Benjamin LaHaise
2010-08-09 17:44 ` Ben Greear
2010-08-09 17:48 ` Benjamin LaHaise [this message]
2010-08-09 18:03 ` Ben Greear
2010-08-09 19:59 ` Eric W. Biederman
2010-08-09 21:03 ` Benjamin LaHaise
2010-08-09 21:17 ` Eric W. Biederman
2009-10-21 16:55 ` Octavian Purdila
2009-10-23 21:13 ` Paul E. McKenney
2009-10-24 4:35 ` Eric Dumazet
2009-10-24 5:49 ` Paul E. McKenney
2009-10-24 8:49 ` Eric Dumazet
2009-10-24 13:52 ` Paul E. McKenney
2009-10-24 14:24 ` Eric Dumazet
2009-10-24 14:46 ` Paul E. McKenney
2009-10-24 23:49 ` Octavian Purdila
2009-10-25 4:47 ` Paul E. McKenney
2009-10-25 8:35 ` Eric Dumazet
2009-10-25 15:19 ` Octavian Purdila
2009-10-25 19:28 ` Eric Dumazet
2009-10-24 20:22 ` Stephen Hemminger
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