From: Victor Yodaiken <yodaiken@fsmlabs.com>
To: Davide Libenzi <davidel@xmailserver.org>
Cc: Victor Yodaiken <yodaiken@fsmlabs.com>,
Mike Kravetz <kravetz@us.ibm.com>,
Momchil Velikov <velco@fadata.bg>,
george anzinger <george@mvista.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] Scheduler issue 1, RT tasks ...
Date: Thu, 27 Dec 2001 17:05:51 -0700 [thread overview]
Message-ID: <20011227170550.F8660@hq2> (raw)
In-Reply-To: <20011226200124.A566@hq2> <Pine.LNX.4.40.0112270931520.1558-100000@blue1.dev.mcafeelabs.com>
In-Reply-To: <Pine.LNX.4.40.0112270931520.1558-100000@blue1.dev.mcafeelabs.com>
On Thu, Dec 27, 2001 at 09:41:33AM -0800, Davide Libenzi wrote:
> > No: we've measured. The time in our system, which does not follow any
> > Linux kernel paths, is dominated by motherboard bus delays.
>
> 17us of bus delay ?!
> UP or SMP ?
> Under which kind of bus load ?
Try
cli
read cycle timer
inb from some isa port
read cycle timer
repeat for a while
sti
print worst case and weep
next prev parent reply other threads:[~2001-12-28 0:13 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-20 21:11 [RFC] Scheduler issue 1, RT tasks Davide Libenzi
2001-12-20 22:25 ` george anzinger
2001-12-20 22:21 ` Momchil Velikov
2001-12-20 22:57 ` Davide Libenzi
2001-12-21 17:00 ` Mike Kravetz
2001-12-21 17:19 ` Davide Libenzi
2001-12-21 17:33 ` Mike Kravetz
2001-12-21 18:29 ` Davide Libenzi
2001-12-24 0:18 ` Victor Yodaiken
2001-12-24 1:31 ` Davide Libenzi
2001-12-24 5:33 ` Victor Yodaiken
2001-12-24 18:52 ` Davide Libenzi
2001-12-27 3:01 ` Victor Yodaiken
2001-12-27 17:41 ` Davide Libenzi
2001-12-28 0:05 ` Victor Yodaiken [this message]
2001-12-28 0:48 ` Davide Libenzi
2001-12-20 22:36 ` Davide Libenzi
2001-12-24 0:19 ` Victor Yodaiken
2001-12-24 1:20 ` Davide Libenzi
2001-12-27 3:42 ` Victor Yodaiken
2001-12-27 17:48 ` Davide Libenzi
-- strict thread matches above, loose matches on Subject: below --
2001-12-28 9:45 Martin Knoblauch
2001-12-29 9:12 ` george anzinger
2001-12-29 19:02 Dieter Nützel
2001-12-29 21:00 ` Andrew Morton
2001-12-29 22:24 ` Davide Libenzi
[not found] <200112291907.LAA25639@messenger.mvista.com>
2001-12-30 10:01 ` george anzinger
2001-12-30 19:54 ` Dieter Nützel
2001-12-31 13:56 ` george anzinger
2002-01-01 18:55 ` Dieter Nützel
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