From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai-core <xenomai@xenomai.org>
Subject: Re: [Xenomai-core] RTDM and Timer functions
Date: Mon, 13 Mar 2006 18:25:58 +0100 [thread overview]
Message-ID: <17429.43814.412464.35016@domain.hid> (raw)
In-Reply-To: <4411C646.80802@domain.hid>
Jan Kiszka wrote:
> > Sometimes the result is "Should be near 84000: 100000", that is kind of
> > correct, since the tickval is 100000, although I think that those functions
> > in the RTDM driver context should be independent of the tick value set by the
> > user program... Maybe using oneshot in the driver calls and periodic in the
> > application... I really don't know what would be the best approach here...
>
> rtdm_clock_read always uses the nucleus clock. Using something different
> (e.g. always TSC) would break applications specifying absolute times
> derived from the return values of other skins' functions.
Maybe adding a service to RTDM would allow users to measure short time
intervals with RTDM using the TSC ?
The native (rt_timer_tsc()) and posix (clock_gettime(CLOCK_MONOTONIC))
skins have a way to do this.
--
Gilles Chanteperdrix.
next prev parent reply other threads:[~2006-03-13 17:25 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-09 17:43 [Xenomai-core] RTDM and Timer functions Rodrigo Rosenfeld Rosas
2006-03-09 20:33 ` Jan Kiszka
2006-03-10 13:54 ` Rodrigo Rosenfeld Rosas
2006-03-10 18:32 ` Jan Kiszka
2006-03-10 20:00 ` Rodrigo Rosenfeld Rosas
2006-03-13 11:48 ` Jan Kiszka
2006-03-13 14:54 ` Rodrigo Rosenfeld Rosas
2006-03-13 17:15 ` Rodrigo Rosenfeld Rosas
2006-03-13 17:58 ` Rodrigo Rosenfeld Rosas
2006-03-13 18:24 ` Jan Kiszka
2006-03-13 19:25 ` Rodrigo Rosenfeld Rosas
2006-03-13 19:19 ` Rodrigo Rosenfeld Rosas
2006-03-15 4:44 ` Jim Cromie
2006-03-13 18:12 ` Jan Kiszka
2006-03-14 1:28 ` Rodrigo Rosenfeld Rosas
2006-03-13 17:25 ` Gilles Chanteperdrix [this message]
2006-03-13 17:31 ` Rodrigo Rosenfeld Rosas
2006-03-13 18:33 ` Jan Kiszka
2006-03-13 19:31 ` Rodrigo Rosenfeld Rosas
2006-03-13 23:05 ` Jan Kiszka
2006-03-14 1:36 ` Rodrigo Rosenfeld Rosas
2006-03-14 6:44 ` Jan Kiszka
2006-03-14 14:27 ` Rodrigo Rosenfeld Rosas
2006-03-14 16:46 ` Jan Kiszka
2006-03-14 16:59 ` Rodrigo Rosenfeld Rosas
2006-03-14 18:45 ` Rodrigo Rosenfeld Rosas
2006-03-14 19:00 ` Jan Kiszka
2006-03-14 19:40 ` Rodrigo Rosenfeld Rosas
2006-03-14 20:29 ` Jan Kiszka
2006-03-14 22:32 ` Rodrigo Rosenfeld Rosas
2006-03-14 22:51 ` Jan Kiszka
2006-03-15 0:31 ` Rodrigo Rosenfeld Rosas
2006-03-15 13:06 ` Philippe Gerum
[not found] ` <44167BE9.2090703@domain.hid>
2006-03-14 10:16 ` Jan Kiszka
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