Re: Interval timer

Matthew Chapman
2008-03-05T10:22:32Z

On Wed, Mar 05, 2008 at 03:53:52AM -0600, Robin Holt wrote:
> On Wed, Mar 05, 2008 at 08:41:28PM +1100, Matthew Chapman wrote:
> > Is there any interval timer on HP zx1 platforms, other than the
> > CPU-based ITC/ITM?
>
> How fine grained do you need? How much jitter are you willing to
> tolerate? How much multiplexing are we talking about?

I don't need any strong guarantees other than the fact that an
interrupt arrives 'sometime in the next millisecond' after
programming the timer - ideally the timeouts I want are of the
order of 10 microseconds (+/- an order of magnitude), but large
jitter is fine.

I'm just looking for a separate mechanism for short-ish timeouts
in my hypervisor, that doesn't involve having to hijack ITM
(the latter being used for HZ-order events).

Matt