From: ebiederm@xmission.com (Eric W. Biederman)
To: Daniel Phillips <phillips@bonn-fries.net>
Cc: J Sloan <joe@tmsusa.com>, linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: [ANNOUNCE] Adeos nanokernel for Linux kernel
Date: 05 Jun 2002 01:28:14 -0600 [thread overview]
Message-ID: <m1lm9uw5f5.fsf@frodo.biederman.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0206041418460.2614-100000@waste.org> <E17FQPj-0001Rr-00@starship> <3CFD8C07.6030607@tmsusa.com> <E17FS6T-0001UR-00@starship>
Daniel Phillips <phillips@bonn-fries.net> writes:
> Improving the average latency of systems is a worthy goal, and there's
> no denying that 'sorta realtime' has its place, however it's no substitute
> for the real thing. A soft realtime system screws up only on occasion,
> but - bugs excepted - a hard realtime system *never* does.
Engineering assumption. Your hardware and/or software always contains
at least one bug. Therefore even in hard real time you must design
and code for the failure case. Hard real time is just doing
everything humanly possible to meet it's deadlines.
The difference with soft real time, is that something that is humanly
possible to do was left off.
Despite the strong relationship to mathematics there are no absolutes
in computer science. Especially hard real time.
Eric
next prev parent reply other threads:[~2002-06-05 7:37 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-03 8:35 [ANNOUNCE] Adeos nanokernel for Linux kernel Karim Yaghmour
2002-06-03 8:46 ` Erik Andersen
2002-06-03 8:56 ` Alessandro Rubini
2002-06-03 9:14 ` Karim Yaghmour
2002-06-03 9:52 ` Erik Andersen
2002-06-03 10:05 ` Alessandro Rubini
2002-06-03 10:12 ` Karim Yaghmour
2002-06-03 10:33 ` Erik Andersen
2002-06-03 10:38 ` Karim Yaghmour
2002-06-03 11:05 ` Daniel Phillips
2002-06-03 9:26 ` Daniel Phillips
2002-06-04 19:29 ` Oliver Xymoron
2002-06-05 2:20 ` Daniel Phillips
2002-06-05 2:40 ` Oliver Xymoron
2002-06-05 2:57 ` Daniel Phillips
2002-06-05 13:51 ` Oliver Xymoron
2002-06-05 14:25 ` Daniel Phillips
2002-06-05 15:37 ` Oliver Xymoron
2002-06-05 17:32 ` Daniel Phillips
2002-06-05 18:06 ` Mark Mielke
2002-06-05 18:26 ` Daniel Phillips
2002-06-05 19:13 ` Oliver Xymoron
2002-06-05 19:40 ` Daniel Phillips
2002-06-05 20:51 ` Mark Mielke
2002-06-05 21:45 ` Daniel Phillips
2002-06-05 21:22 ` Oliver Xymoron
2002-06-05 21:55 ` Daniel Phillips
2002-06-06 8:52 ` Peter Wächtler
2002-06-06 10:58 ` Daniel Phillips
2002-06-06 14:03 ` Peter Wächtler
2002-06-06 16:53 ` Daniel Phillips
2002-06-05 20:48 ` Mark Mielke
2002-06-06 8:34 ` Peter Wächtler
2002-06-08 13:50 ` john slee
2002-06-08 13:59 ` Thunder from the hill
2002-06-06 21:21 ` Pavel Machek
2002-06-07 1:35 ` Mark Mielke
2002-06-07 2:42 ` Daniel Phillips
2002-06-07 2:48 ` Mark Mielke
2002-06-07 10:32 ` Daniel Phillips
2002-06-07 21:35 ` Pavel Machek
2002-06-05 9:41 ` Ingo Oeser
2002-06-05 18:20 ` Karim Yaghmour
2002-06-05 3:56 ` J Sloan
2002-06-05 4:08 ` Daniel Phillips
2002-06-05 7:28 ` Eric W. Biederman [this message]
2002-06-05 11:15 ` Peter Wächtler
2002-06-05 12:56 ` Daniel Phillips
2002-06-05 11:11 ` Peter Wächtler
2002-06-05 16:55 ` Rob Landley
2002-06-04 16:10 ` Pavel Machek
2002-06-04 19:59 ` Karim Yaghmour
2002-06-04 21:53 ` Karim Yaghmour
2002-06-04 23:06 ` Alan Cox
2002-06-05 4:00 ` Daniel Phillips
-- strict thread matches above, loose matches on Subject: below --
2002-06-05 9:24 Martin.Knoblauch
2002-06-05 19:01 Paul Zimmerman
2002-06-05 19:11 ` Karim Yaghmour
2002-06-05 20:17 ` Daniel Phillips
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