From: "Christopher Friesen" <cfriesen@nortelnetworks.com>
To: Roger Larsson <roger.larsson@skelleftea.mail.telia.com>
Cc: Fred <fred@arkansaswebs.com>, linux-kernel@vger.kernel.org
Subject: Re: Should I use Linux to develop driver for specialized ISA card?
Date: Tue, 04 Sep 2001 15:35:26 -0400 [thread overview]
Message-ID: <3B952CFE.A3B6FF95@nortelnetworks.com> (raw)
In-Reply-To: <E15eHup-0003ir-00@the-village.bc.nu> <01090410264000.14864@bits.linuxball> <3B950034.17909E5D@nortelnetworks.com> <200109041823.f84INqE13918@maild.telia.com>
Roger Larsson wrote:
>
> On Tuesday den 4 September 2001 18:24, Christopher Friesen wrote:
> > Fred wrote:
> > > I'm curious, Alan, Why? I'm a hardware developer, and I would have
> > > assumed that linux would have been ideal for real time / embedded
> > > projects? (routers / controllers / etc.) Is there, for instance, a reason
> > > to suspect that linux would not be able to respond to interrupts at say
> > > 8Khz?
> > > of course I know nothing of rtlinux so I'll read.
> >
> > I'm involved in a project where we are using linux in an embedded
> > application. We've got a gig of ram, no hard drives, no video, and the only
> > I/O is serial, ethernet and fiberchannel.
> >
> > We have a realtime process that tries to run every 50ms. We're seeing
> > actual worst-case scheduling latencies upwards of 300-400ms.
> 1) Why shouldn't the low-latency patches work for another architecture?
> Andrew Morton might be interested to fix other architectures too.
> (but most patches are not in architecture specific code)
Well, a while back I took a look at the low latency patch and saw a bunch of
arch-specific files being modified so I assumed that it wouldn't do much on a
different architecture. I may have been wrong. I guess its time for me to do
some testing.
Chris
--
Chris Friesen | MailStop: 043/33/F10
Nortel Networks | work: (613) 765-0557
3500 Carling Avenue | fax: (613) 765-2986
Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com
next prev parent reply other threads:[~2001-09-04 19:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-04 12:57 Should I use Linux to develop driver for specialized ISA card? Rastislav Stanik
2001-09-04 13:28 ` Richard B. Johnson
2001-09-04 13:30 ` Anton Altaparmakov
2001-09-04 13:42 ` Erik Mouw
2001-09-17 19:19 ` Rogier Wolff
2001-09-04 15:15 ` Alan Cox
2001-09-04 15:26 ` Fred
2001-09-04 15:36 ` Alan Cox
2001-09-04 15:40 ` Joel Jaeggli
2001-09-04 16:24 ` Christopher Friesen
2001-09-04 17:32 ` Mark Frazer
2001-09-04 17:53 ` Christopher Friesen
2001-09-04 18:19 ` Roger Larsson
2001-09-04 18:54 ` J Sloan
2001-09-04 19:35 ` Christopher Friesen [this message]
2001-09-04 19:58 ` Andrew Morton
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