Re: real-time support in Linux (again)

Richard Gooch (rgooch@atnf.csiro.au)
Mon, 1 Mar 1999 10:37:05 +1100

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yodaiken@chelm.cs.nmt.edu writes:
> > what's the difference between using rtlinux for real-time and linux for
> > time-sharing, and Sun's approach with Solaris where the scheduler
> > algorithms are contained in something akin to loadable kernel modules?
>
> Sun advertises 2millisecond worst case response time on a dual
> processor that is only running their "rt" on one processor. RTlinux
> gives 40microsecond response time on a single 486. So the difference
> is about 2 orders of magnitude in performance and plus 3 more in
> cost.

>From when is that response time measured? From the time the CPU enters
the interrupt handler, or from the time the interrupt hits the CPU?

Also, the 2 ms case Sun quotes: what kind of hardware is that?

Regards,

Richard....

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