From: kuznet@ms2.inr.ac.ru
To: Robert.Olsson@data.slu.se (Robert Olsson)
Cc: dipankar@in.ibm.com, Robert.Olsson@data.slu.se (Robert Olsson),
andrea@suse.de (Andrea Arcangeli),
davem@redhat.com (David S. Miller),
kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org,
netdev@oss.sgi.com, paulmck@us.ibm.com, akpm@osdl.org
Subject: Re: route cache DoS testing and softirqs
Date: Thu, 8 Apr 2004 17:29:13 +0400 (MSD) [thread overview]
Message-ID: <200404081329.RAA16178@yakov.inr.ac.ru> (raw)
In-Reply-To: <16498.43191.733850.18276@robur.slu.se> from "Robert Olsson" at =?ISO-8859-1?Q?=20=E1?= =?ISO-8859-1?Q?=D0=D2?= 06, 2004 02:55:19
Hello!
> setup. I've done a little experimental patch so *all* softirq's are run via
> ksoftirqd.
BTW what's about performance in this extremal situation?
Also, Robert, let's count the numbers again. With this change you should
have latency much less 100msec when priority of ksoftirqd is high.
So, rcu problem must be solved at current flow rates.
This enforces me to suspect we have another source of overflows.
F.e. one silly place could be that you set gc_min_interval via sysctl,
which uses second resolution (yup :-(). With one second you get maximal
ip_rt_max_size/1 second flow rate, it is _not_ a lot.
Alexey
next prev parent reply other threads:[~2004-04-08 13:29 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-29 18:45 Dipankar Sarma
2004-03-29 22:29 ` Andrea Arcangeli
2004-03-30 5:06 ` Srivatsa Vaddagiri
2004-03-30 5:35 ` Srivatsa Vaddagiri
2004-03-30 15:11 ` Andrea Arcangeli
2004-03-31 2:36 ` Rusty Russell
2004-03-30 14:43 ` Dipankar Sarma
2004-03-30 19:53 ` Dipankar Sarma
2004-03-30 20:47 ` Andrea Arcangeli
2004-03-30 21:06 ` Dipankar Sarma
2004-03-30 21:27 ` Andrea Arcangeli
2004-03-30 21:29 ` Robert Olsson
2004-03-31 7:36 ` Dipankar Sarma
2004-03-30 20:05 ` kuznet
2004-03-30 20:28 ` Dipankar Sarma
2004-04-01 6:00 ` kuznet
2004-03-30 21:14 ` Andrea Arcangeli
2004-03-30 21:30 ` David S. Miller
2004-03-30 21:37 ` Andrea Arcangeli
2004-03-30 22:22 ` David S. Miller
2004-03-30 22:49 ` Andrea Arcangeli
2004-03-31 20:46 ` Dipankar Sarma
2004-03-31 21:31 ` Andrea Arcangeli
2004-03-31 21:52 ` Dipankar Sarma
2004-03-30 22:33 ` Robert Olsson
2004-03-31 17:10 ` Dipankar Sarma
2004-03-31 18:46 ` Robert Olsson
2004-03-31 20:37 ` Dipankar Sarma
2004-03-31 21:28 ` Andrea Arcangeli
2004-03-31 21:43 ` Dipankar Sarma
2004-04-05 17:11 ` Robert Olsson
2004-04-05 21:22 ` Dipankar Sarma
2004-04-06 12:55 ` Robert Olsson
2004-04-06 19:52 ` Dipankar Sarma
2004-04-07 15:23 ` Robert Olsson
2004-04-07 19:48 ` Dipankar Sarma
2004-04-08 13:29 ` kuznet [this message]
2004-04-08 14:07 ` Robert Olsson
2004-03-31 22:36 ` Robert Olsson
2004-03-31 22:52 ` Andrea Arcangeli
2004-04-01 6:43 ` kuznet
2004-04-01 13:16 ` Andrea Arcangeli
2004-04-08 13:38 ` kuznet
2004-04-01 13:44 ` Robert Olsson
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