From: Ted Dennison <dennison@telepath.com>
Subject: Re: Using "delay until" in real-time
Date: Tue, 12 Dec 2000 20:54:32 GMT
Date: 2000-12-12T20:54:32+00:00 [thread overview]
Message-ID: <9163a4$2c5$1@nnrp1.deja.com> (raw)
In-Reply-To: yec3dfttmnd.fsf@king.cts.com
In article <yec3dfttmnd.fsf@king.cts.com>,
Keith Thompson <kst@cts.com> wrote:
> Ted Dennison <dennison@telepath.com> writes:
> The value 1.0/60.0 is still not exactly representable; it's going to
> be either 0.166666666 or 0.166666667.
Right, that's the issue. The resolution just dictates how often we get
hosed. We don't want to get hosed at all.
> Is the scheduler intended to be portable? If the design of the
> scheduler depends on the underlying 240Hz clock tick, perhaps you
> should just bite the bullet and delay for 4 ticks.
It is portable right now. The only system dependancy is that the
executive's clock rate be achieveable exactly. On the OS we are using
(vxWorks) that can be set via a script or compiled into the kernel. I
see no good reason to make it non-portable if I don't have to.
I'm trying out the cycle-counting solution right now. If anyone has any
better ideas, I'd still like to hear them.
--
T.E.D.
http://www.telepath.com/~dennison/Ted/TED.html
Sent via Deja.com
http://www.deja.com/
next prev parent reply other threads:[~2000-12-12 20:54 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-12-12 16:27 Using "delay until" in real-time Ted Dennison
2000-12-12 18:01 ` Mike Silva
2000-12-12 19:57 ` Ted Dennison
2000-12-12 23:02 ` Mike Silva
2000-12-12 23:49 ` Ted Dennison
2000-12-18 6:26 ` Ray Blaak
2000-12-12 20:00 ` Ken Garlington
2000-12-12 20:40 ` Ted Dennison
2000-12-13 4:02 ` Ken Garlington
2000-12-13 14:29 ` Ted Dennison
2000-12-13 16:53 ` Larry Hazel
2000-12-13 17:41 ` Ted Dennison
2000-12-12 20:22 ` Keith Thompson
2000-12-12 20:54 ` Ted Dennison [this message]
2000-12-13 5:35 ` tmoran
2000-12-12 20:23 ` David C. Hoos, Sr.
2000-12-12 21:58 ` Ted Dennison
2000-12-12 23:18 ` Jeff Carter
2000-12-12 21:18 ` JP Thornley
2000-12-12 22:31 ` Ted Dennison
2000-12-13 8:02 ` Brian Orpin
2000-12-13 17:32 ` JP Thornley
2000-12-12 23:09 ` Ted Dennison
2000-12-13 7:43 ` Brian Orpin
2000-12-15 0:27 ` Frank
2000-12-19 7:50 ` Martin Gangkofer
2000-12-20 3:32 ` Ted Dennison
2000-12-20 5:29 ` tmoran
2000-12-20 7:59 ` Martin Gangkofer
2000-12-20 9:15 ` java servlets JF Harrison
2000-12-20 12:50 ` Using "delay until" in real-time Marin David Condic
2000-12-21 0:08 ` Alejandro R. Mosteo
2000-12-20 3:17 ` Ted Dennison
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox