From: Georg Bauhaus <bauhaus@arcor.de>
Subject: Re: real_time.clock is not monotonic
Date: Wed, 21 Feb 2007 20:46:24 +0100
Date: 2007-02-21T20:44:26+01:00 [thread overview]
Message-ID: <1172087184.5771.3.camel@localhost> (raw)
In-Reply-To: <1172074608.834181.198540@j27g2000cwj.googlegroups.com>
On Wed, 2007-02-21 at 08:16 -0800, frederic.ormancey@atosorigin.com
wrote:
> in Linux implementation of Gnat RunTime, Monotonic_Clock is a
> single rename of calendar.clock, which use gettimeofday() system
> call !!!!
>
> I'll alert Gnat community with this bad implementation, as
> gettimeofday() is affected by NTP and others date adjustements. in
> LRM, Ada.Real_Time.Clock shall be monotonic => Gnat runtime is not
> compliant
What is a possible alternative when making calls to a garden
variety Linux kernel? Is there real-time POSIX support in
"normal" Linux based systems?
> This bug was detected with 3.15p Linux version, but implementation is
> still the same with latest source of gnat runtime (s-osprim.adb).
>
> Did someone have a solution for this problem ? another implementation
> using a Linux monotonic clock ?
next prev parent reply other threads:[~2007-02-21 19:46 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-21 16:16 real_time.clock is not monotonic frederic.ormancey
2007-02-21 19:46 ` Georg Bauhaus [this message]
2007-02-21 20:33 ` Michael Bode
2007-02-21 20:17 ` Simon Wright
2007-02-22 9:50 ` Duncan Sands
2007-02-22 10:34 ` Simon Wright
2007-02-22 10:53 ` Duncan Sands
2007-02-22 20:48 ` Simon Wright
2007-02-26 8:50 ` Florian Weimer
2007-02-26 20:59 ` Simon Wright
2007-02-22 2:05 ` Adam Beneschan
2007-02-22 2:34 ` Randy Brukardt
2007-02-22 3:19 ` Adam Beneschan
2007-02-22 11:04 ` [OT] Broken threading (was RE: real_time.clock is not monotonic) Alex R. Mosteo
2007-02-22 11:39 ` Georg Bauhaus
2007-02-22 14:52 ` Alex R. Mosteo
2007-02-23 0:43 ` Randy Brukardt
2007-02-23 10:11 ` Alex R. Mosteo
2007-02-25 0:39 ` [OT] Broken threading Björn Persson
2007-02-26 8:50 ` Alex R. Mosteo
2007-02-27 0:13 ` Randy Brukardt
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