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

Victor Yodaiken (yodaiken@fsmlabs.com)
Thu, 27 Dec 2001 17:05:51 -0700

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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