From: Andrea Arcangeli <andrea@suse.de>
To: Karim Yaghmour <karim@opersys.com>
Cc: Ingo Molnar <mingo@elte.hu>, Bill Huey <bhuey@lnxw.com>,
Kristian Benoit <kbenoit@opersys.com>,
linux-kernel@vger.kernel.org, paulmck@us.ibm.com,
tglx@linutronix.de, pmarques@grupopie.com, bruce@andrew.cmu.edu,
nickpiggin@yahoo.com.au, ak@muc.de, sdietrich@mvista.com,
dwalker@mvista.com, hch@infradead.org, akpm@osdl.org,
rpm@xenomai.org
Subject: Re: PREEMPT_RT vs I-PIPE: the numbers, part 2
Date: Thu, 23 Jun 2005 01:57:20 +0200 [thread overview]
Message-ID: <20050622235720.GA6200@g5.random> (raw)
In-Reply-To: <42B9F673.4040100@opersys.com>
On Wed, Jun 22, 2005 at 07:38:27PM -0400, Karim Yaghmour wrote:
> Bare in mind here that what we're trying to find out with such
> tests is what is the bare minimum cost of the proposed rt
> enhancements to Linux, and how well do these perform in their
> rt duties, the most basic of which being interrupt latency.
Agreed. I think it makes more sense to keep comparing it against the UP
kernel with preempt disabled, since most embedded devices aren't smp.
> To be honest, however, I have a very hard time, as a user, to
> convince myself that I should enable preempt_rt under any but
> the most dire situations given the results I now have in front
Same here.
next prev parent reply other threads:[~2005-06-22 23:57 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-20 17:13 PREEMPT_RT vs I-PIPE: the numbers, part 2 Kristian Benoit
2005-06-20 18:31 ` Bill Huey
2005-06-22 16:00 ` Karim Yaghmour
2005-06-22 19:29 ` Bill Huey
2005-06-22 20:05 ` Ingo Molnar
2005-06-22 20:39 ` Karim Yaghmour
2005-06-22 22:04 ` Ingo Molnar
2005-06-22 23:03 ` Lee Revell
2005-06-22 23:52 ` Karim Yaghmour
2005-06-22 23:38 ` Karim Yaghmour
2005-06-22 23:57 ` Andrea Arcangeli [this message]
2005-06-23 0:05 ` Daniel Walker
2005-06-23 0:48 ` Karim Yaghmour
2005-06-23 0:06 ` Ingo Molnar
2005-06-23 0:47 ` Karim Yaghmour
2005-06-23 0:55 ` Bill Huey
2005-06-23 1:09 ` Karim Yaghmour
2005-06-23 1:15 ` Bill Huey
2005-06-23 1:47 ` Karim Yaghmour
2005-06-23 0:59 ` David Lang
2005-06-23 1:22 ` Karim Yaghmour
2005-06-23 1:42 ` David Lang
2005-06-23 2:09 ` Karim Yaghmour
2005-06-23 2:15 ` David Lang
2005-06-23 1:34 ` Ingo Molnar
2005-06-23 2:02 ` Karim Yaghmour
2005-06-23 3:57 ` Lee Revell
2005-06-23 4:13 ` Karim Yaghmour
2005-06-22 20:10 ` Karim Yaghmour
2005-06-22 20:15 ` Bill Huey
2005-06-21 1:55 ` Paul E. McKenney
2005-06-21 2:29 ` Karim Yaghmour
2005-06-22 1:19 ` Paul E. McKenney
2005-06-22 15:31 ` Karim Yaghmour
2005-06-22 15:27 ` Kristian Benoit
2005-06-22 16:27 ` Paul E. McKenney
2005-06-22 17:20 ` Kristian Benoit
2005-06-22 17:34 ` Ingo Molnar
2005-06-22 17:40 ` Ingo Molnar
2005-06-22 18:12 ` Karim Yaghmour
2005-06-22 18:14 ` Ingo Molnar
2005-06-22 19:04 ` Karim Yaghmour
2005-06-22 18:50 ` Paul E. McKenney
2005-06-22 19:04 ` Ingo Molnar
2005-06-22 20:17 ` Karim Yaghmour
2005-06-22 20:22 ` Ingo Molnar
2005-06-22 21:03 ` Karim Yaghmour
2005-06-22 21:10 ` Ingo Molnar
2005-06-22 21:32 ` Karim Yaghmour
2005-06-22 22:41 ` Ingo Molnar
2005-06-22 23:02 ` Karim Yaghmour
2005-06-22 21:20 ` Paul E. McKenney
2005-06-22 19:08 ` Karim Yaghmour
2005-06-23 14:48 ` Paulo Marques
2005-06-22 17:58 ` Karim Yaghmour
2005-06-22 18:47 ` Paul E. McKenney
2005-06-22 19:16 ` Karim Yaghmour
2005-06-22 21:23 ` Paul E. McKenney
2005-06-22 17:17 ` Lee Revell
2005-06-22 17:32 ` Karim Yaghmour
2005-06-29 7:43 ` PREEMPT_RT & threading IRQ 0 Ingo Molnar
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