On Tue, 2006-02-21 at 15:28 -0500, Lee Revell wrote:
> On Tue, 2006-02-21 at 13:19 -0600, Jan Depner wrote:
> > There's a bunch of information on that on my site (albeit outdated).
> > Tuning the disk drives is a must and it *will* help but there are
> > instances where the disk drive is busy and you can't get to it no
> > matter
> > how well tuned it is. I prefer to minimize any chance of that. You
> > have to remember that unless you're running RTLinux or VXWorks (or DOS
> > or VMS) you're not running a hard real time system. Shit happens.
> >
>
> The -rt kernel with fuill preemption actually is a hard real time system
> (no one claims it is in the same league of reliability as QNX or
> VXWorks, yet...) - it should be able to guarantee response times.
>
While I agree that it's very good it's not hard real-time. It can't
do guaranteed 15 microsecond interrupt response. It is a very good soft
real-time system.
> Of course the best RTOS in the world won't save you from apps that do
> disk or GUI stuff in a non RT safe way, or from buggy ACPI
> implementations that disappear the CPU out from under the OS for
> milliseconds...
>
Yup. I hate it when that happens ;-)
--
Jan 'Evil Twin' Depner
The Fuzzy Dice
http://myweb.cableone.net/eviltwin69/fuzzy.html
"As we enjoy great advantages from the invention of others, we should be
glad of an opportunity to serve others by any invention of ours, and
this we should do freely and generously."
Benjamin Franklin, on declining patents offered by the governor of
Pennsylvania for his "Pennsylvania Fireplace", c. 1744
