From: Rodrigo Rosenfeld Rosas <lbocseg@domain.hid>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-core] Synchronising TSC and periodic timer
Date: Tue, 21 Mar 2006 00:11:24 -0300 [thread overview]
Message-ID: <441F6EDC.6020502@domain.hid> (raw)
In-Reply-To: <441F4494.5010803@domain.hid>
Jan Kiszka escreveu:
>We discussed a lot about how to prevent the user shooting him/herself in
>the knee with inter-tick timestamps, but I still think that
>rtdm_clock_read_tsc() would even be worse in this regard.
>
>
What do you think abou this documentation:
"This function is meant to be used in periodic mode for getting a high
timestamp, independently from the system timer's tick.
Its return values should not be used mixed with rtdm_clock_read() values
because they are not syncronised.
Driver authors[developers?] are advised to state this on driver
documentation for the final users where returning these values to them
for avoiding confusion.
Note: This function is available for uniprocessor systems only in the
meantime."
I think it explains and will not make confusion in driver developers...
If sometime someone give a good solution to the syncronisation problem
between multiple processors, this can be changed...
> ...
Rodrigo.
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next prev parent reply other threads:[~2006-03-21 3:11 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-14 20:45 [Xenomai-core] Synchronising TSC and periodic timer Jan Kiszka
2006-03-15 7:24 ` Jan Kiszka
[not found] ` <4417C74D.3060203@domain.hid>
2006-03-15 8:14 ` Jan Kiszka
2006-03-15 12:59 ` Philippe Gerum
2006-03-15 13:26 ` Gilles Chanteperdrix
2006-03-15 22:58 ` Philippe Gerum
2006-03-20 11:48 ` Jan Kiszka
2006-03-20 13:26 ` Philippe Gerum
2006-03-20 14:42 ` Rodrigo Rosenfeld Rosas
2006-03-20 16:51 ` Philippe Gerum
2006-03-20 19:27 ` Rodrigo Rosenfeld Rosas
2006-03-21 0:11 ` Jan Kiszka
2006-03-21 3:11 ` Rodrigo Rosenfeld Rosas [this message]
2006-03-20 14:46 ` Jan Kiszka
2006-03-21 12:44 ` Philippe Gerum
2006-03-24 13:14 ` Jan Kiszka
[not found] ` <200603201137.12548.rosenfeld@domain.hid>
2006-03-20 15:23 ` Philippe Gerum
2006-03-20 19:01 ` Rodrigo Rosenfeld Rosas
2006-03-21 17:57 ` Philippe Gerum
2006-03-15 13:34 ` Gilles Chanteperdrix
2006-03-15 16:50 ` Jan Kiszka
2006-03-16 15:26 ` Gilles Chanteperdrix
2006-03-17 1:16 ` Jan Kiszka
[not found] <1CFEB358338412458B21FAA0D78FE86D02CABF1C@rennsmail02.eu.thmulti.com>
2006-03-15 17:20 ` Jan Kiszka
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