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From: Robin Holt <holt@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: Interval timer
Date: Wed, 05 Mar 2008 21:19:16 +0000	[thread overview]
Message-ID: <20080305211916.GC2013@sgi.com> (raw)
In-Reply-To: <20080305094128.GA30069@cse.unsw.EDU.AU>

On Wed, Mar 05, 2008 at 09:22:32PM +1100, Matthew Chapman wrote:
> 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.

How about setting HZ to 1024 and using regular add_timer() timers?

Thanks,
Robin

  parent reply	other threads:[~2008-03-05 21:19 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-05  9:41 Interval timer Matthew Chapman
2008-03-05  9:53 ` Robin Holt
2008-03-05 10:22 ` Matthew Chapman
2008-03-05 21:19 ` Robin Holt [this message]
2008-03-05 22:36 ` Matthew Chapman

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