From: "David S. Miller" <davem@redhat.com>
To: Andrea Arcangeli <andrea@suse.de>
Cc: kuznet@ms2.inr.ac.ru, dipankar@in.ibm.com,
linux-kernel@vger.kernel.org, netdev@oss.sgi.com,
Robert.Olsson@data.slu.se, paulmck@us.ibm.com, akpm@osdl.org
Subject: Re: route cache DoS testing and softirqs
Date: Tue, 30 Mar 2004 13:30:00 -0800 [thread overview]
Message-ID: <20040330133000.098761e2.davem@redhat.com> (raw)
In-Reply-To: <20040330211450.GI3808@dualathlon.random>
On Tue, 30 Mar 2004 23:14:50 +0200
Andrea Arcangeli <andrea@suse.de> wrote:
> > There are no hardirqs in the case under investigation, remember?
>
> no hardirqs? there must be tons of hardirqs if ksoftirqd never runs.
NAPI should be kicking in for this workload, and I know for a fact it is
for Robert's case. There should only be a few thousand hard irqs per
second.
Until the RX ring is depleted the device's hardirqs will not be re-
enabled.
next prev parent reply other threads:[~2004-03-30 21:30 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-29 18:45 route cache DoS testing and softirqs 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 [this message]
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
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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