From: kuznet@ms2.inr.ac.ru
To: mingo@redhat.com (Ingo Molnar)
Cc: torvalds@transmeta.com, andrea@suse.de, maxk@qualcomm.com,
linux-kernel@vger.kernel.org, davem@redhat.com
Subject: Re: [PATCH] [IMPORTANT] Re: 2.4.7 softirq incorrectness.
Date: Tue, 31 Jul 2001 22:08:41 +0400 (MSK DST) [thread overview]
Message-ID: <200107311808.WAA08841@ms2.inr.ac.ru> (raw)
In-Reply-To: <Pine.LNX.4.33.0107301444430.28294-100000@devserv.devel.redhat.com> from "Ingo Molnar" at Jul 30, 1 02:50:21 pm
Hello!
> nope. i observed latency issues with restart + ksoftirqd as well.
Ingo, what is impact on total performance yet?
Just to remind: simple constantation of the fact that "latency is bad"
still does not imply that dead loops are inevitable.
We really could try to complicate policing of softirqs (f.e. counting cycles
on them and breaking loop with falling to ksoftirqd after it preempts
threads for more than some threshold). But it is still not clear
that it is worth to do. If you see an impact, let's try this way.
Probably, priority on ksoftirqd should be tuned. Seems, it still
should have high priority, a bit less than real-time.
Alexey
next prev parent reply other threads:[~2001-07-31 18:09 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-22 20:44 Rusty Russell
2001-07-22 23:34 ` Andrea Arcangeli
2001-07-23 9:06 ` Rusty Russell
2001-07-23 14:29 ` Andrea Arcangeli
2001-07-24 9:35 ` Rusty Russell
2001-07-25 19:33 ` Andrea Arcangeli
2001-07-26 20:26 ` Rusty Russell
2001-07-23 9:25 ` Kai Germaschewski
2001-07-23 11:12 ` Jeff Garzik
2001-07-23 14:18 ` Andrea Arcangeli
2001-07-23 12:05 ` David S. Miller
2001-07-23 14:31 ` Andrea Arcangeli
2001-07-23 22:24 ` Alexey Kuznetsov
2001-07-25 22:23 ` Andrea Arcangeli
2001-07-26 17:46 ` kuznet
2001-07-26 18:03 ` Jeff Garzik
2001-07-26 18:29 ` Andrea Arcangeli
2001-07-27 16:48 ` kuznet
2001-07-27 18:31 ` Maksim Krasnyanskiy
2001-07-27 18:59 ` kuznet
2001-07-27 19:21 ` Maksim Krasnyanskiy
2001-07-27 19:35 ` kuznet
2001-07-28 0:52 ` [PATCH] [IMPORTANT] " Maksim Krasnyanskiy
2001-07-28 17:41 ` kuznet
2001-07-28 18:02 ` Andrea Arcangeli
2001-07-28 19:02 ` kuznet
2001-07-28 19:32 ` Andrea Arcangeli
2001-07-28 23:28 ` Alexey Kuznetsov
2001-07-29 17:07 ` Linus Torvalds
2001-07-29 17:52 ` kuznet
2001-07-30 18:50 ` Ingo Molnar
2001-07-30 22:47 ` Nigel Gamble
2001-07-30 22:56 ` Christoph Hellwig
2001-07-31 18:08 ` kuznet [this message]
2001-07-28 17:54 ` Andrea Arcangeli
2001-07-28 19:17 ` Andrea Arcangeli
2001-07-30 18:32 ` Maksim Krasnyanskiy
2001-07-27 0:47 ` Maksim Krasnyanskiy
2001-07-27 15:01 ` Andrea Arcangeli
2001-07-27 9:34 ` David S. Miller
2001-07-27 17:01 ` kuznet
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