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

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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

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