From: Ingo Molnar <mingo@elte.hu>
To: Kristian Benoit <kbenoit@opersys.com>
Cc: linux-kernel@vger.kernel.org, paulmck@us.ibm.com, bhuey@lnxw.com,
andrea@suse.de, tglx@linutronix.de, karim@opersys.com,
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 and I-PIPE: the numbers, take 3
Date: Thu, 30 Jun 2005 18:55:57 +0200 [thread overview]
Message-ID: <20050630165557.GA15692@elte.hu> (raw)
In-Reply-To: <42C320C4.9000302@opersys.com>
* Kristian Benoit <kbenoit@opersys.com> wrote:
> "plain" run:
>
> Measurements | Vanilla | preemp_rt |
> ---------------+-------------+----------------+
> fork | 93us | 157us (+69%) |
> open/close | 2.3us | 3.7us (+43%) |
> execve | 351us | 446us (+27%) |
> select 500fd | 12.7us | 25.8us (+103%) |
> mmap | 660us | 2867us (+334%) |
> pipe | 7.1us | 11.6us (+63%) |
update: these tests should perform significantly better on the freshly
released -50-37 (or later) PREEMPT_RT kernels. (fork, execve, mmap [*]
was improved in -50-36, the others in -50-37)
Ingo
[*] the extent of the above fork/execve/mmap costs is still unexplained,
unless the test was run with HIGHMEM64 and HIGHPTE enabled.
prev parent reply other threads:[~2005-06-30 16:57 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-29 22:29 PREEMPT_RT and I-PIPE: the numbers, take 3 Kristian Benoit
2005-06-29 22:57 ` Bill Huey
2005-06-29 23:03 ` Andrea Arcangeli
2005-06-29 23:33 ` Bill Huey
2005-06-29 23:54 ` Paul E. McKenney
2005-06-30 1:50 ` Bill Huey
2005-06-30 1:56 ` Nick Piggin
2005-06-30 2:14 ` Bill Huey
2005-06-30 2:09 ` Nick Piggin
2005-06-30 2:18 ` Bill Huey
2005-06-30 6:50 ` Steven Rostedt
2005-06-30 14:15 ` Zwane Mwaikambo
2005-06-30 19:08 ` Bill Huey
2005-06-30 2:01 ` Nicolas Pitre
2005-06-30 2:16 ` Bill Huey
2005-06-30 2:19 ` Paul E. McKenney
2005-06-30 14:59 ` Bill Davidsen
2005-06-30 18:59 ` Bill Huey
2005-06-30 7:07 ` Ingo Molnar
2005-06-30 15:43 ` Paul E. McKenney
2005-06-30 16:17 ` Ingo Molnar
2005-06-30 16:48 ` Sven-Thorsten Dietrich
2005-06-30 23:08 ` Paul E. McKenney
2005-06-29 23:49 ` Paul E. McKenney
2005-06-30 5:55 ` Ingo Molnar
2005-06-30 10:32 ` Ingo Molnar
2005-06-30 16:55 ` Ingo Molnar [this message]
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