From: "Brian Catlin" <briancatlin@mindspring.com>
Subject: Re: Ada OS Kernel features
Date: Wed, 5 Sep 2001 23:56:47 -0700
Date: 2001-09-06T06:58:42+00:00 [thread overview]
Message-ID: <9n76r2$nkl$1@slb4.atl.mindspring.net> (raw)
In-Reply-To: 9n762l$7ah4@news.kvaerner.com
"Tarjei T. Jensen" <tarjei.jensen@kvaerner.com> wrote in message
news:9n762l$7ah4@news.kvaerner.com...
>
> Brian Catlin wrote
> >Well, I wouldn't hold Mach up as the end-all or be-all of operating system
> >kernels; its performance is nothing to brag about. It certainly has many
> >interesting concepts, but its overhead is too high for my taste (I haven't
> >looked at it in several years, so it may have been cleaned up; I'll have to
> go
> >check it out again).
>
> As I recall Mach is supposed to represent a snapshot of microkernel
> technology at a relative early stage. I believe that at least IBM has
> advanced the state of the art considerably since mach was released.
Yes, I just looked at RT-Mach (Real-Time Mach), and it is quite impressive - as
far as microkernels go. The big problem with microkernels is that you have to
use RPC to communicate between services, which is much more expensive than a
simple CALL in a monolithic kernel.
-Brian
next prev parent reply other threads:[~2001-09-06 6:56 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-05 5:58 Ada OS Kernel features Brian Catlin
2001-09-05 10:15 ` Jacob Sparre Andersen
2001-09-05 11:16 ` Larry Kilgallen
2001-09-05 17:06 ` Brian Catlin
2001-09-06 14:35 ` Marin David Condic
2001-09-07 9:31 ` Tarjei T. Jensen
2001-09-05 17:55 ` David Starner
2001-09-05 18:42 ` Darren New
2001-09-12 6:47 ` Mats Karlssohn
2001-09-05 14:04 ` Ted Dennison
2001-09-05 17:23 ` Brian Catlin
2001-09-05 20:17 ` Ted Dennison
2001-09-05 21:10 ` Brian Catlin
2001-09-06 6:45 ` Tarjei T. Jensen
2001-09-06 6:56 ` Brian Catlin [this message]
2001-09-06 14:05 ` Ted Dennison
2001-09-05 16:02 ` Alfred Hilscher
2001-09-05 16:19 ` Jacob Sparre Andersen
2001-09-05 17:58 ` Brian Catlin
2001-09-05 17:44 ` Brian Catlin
2001-09-05 17:58 ` Darren New
2001-09-05 18:51 ` Larry Kilgallen
2001-09-05 19:25 ` chris.danx
2001-09-05 20:07 ` Darren New
2001-09-05 20:14 ` Larry Kilgallen
2001-09-06 13:45 ` Alfred Hilscher
2001-09-06 18:06 ` chris.danx
2001-09-06 19:41 ` Larry Kilgallen
2001-09-06 22:32 ` chris.danx
2001-09-07 11:04 ` Larry Kilgallen
2001-09-07 8:04 ` Dmitry Kazakov
2001-09-07 8:18 ` Mattias Svensson
2001-09-07 12:40 ` Dmitry Kazakov
2001-09-12 7:12 ` Mats Karlssohn
2001-09-05 20:18 ` Brian Catlin
2001-09-06 6:48 ` Ole-Hjalmar Kristensen
2001-09-06 6:59 ` Brian Catlin
2001-09-10 7:32 ` Ole-Hjalmar Kristensen
2001-09-06 13:42 ` Alfred Hilscher
2001-09-07 8:13 ` Dmitry Kazakov
2001-09-08 3:55 ` Kenneth Almquist
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