Re: [RFC] Scheduler issue 1, RT tasks ...

Davide Libenzi
2001-12-28T00:46:27Z

On Thu, 27 Dec 2001, Victor Yodaiken wrote:

> On Thu, Dec 27, 2001 at 09:41:33AM -0800, Davide Libenzi wrote:
> > > No: we've measured. The time in our system, which does not follow any
> > > Linux kernel paths, is dominated by motherboard bus delays.
> >
> > 17us of bus delay ?!
> > UP or SMP ?
> > Under which kind of bus load ?
>
> Try
> cli
> read cycle timer
> inb from some isa port
> read cycle timer
> repeat for a while
> sti
> print worst case and weep

No need to test, i've a positive guess from ISA :)

- Davide