From: "Michael Kerrisk" <mtk.manpages@googlemail.com>
To: "Bart Van Assche" <bart.vanassche@gmail.com>
Cc: "Roman Zippel" <zippel@linux-m68k.org>,
"Michael Kerrisk" <mtk.manpages@gmail.com>,
lkml <linux-kernel@vger.kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"john stultz" <johnstul@us.ibm.com>,
"Ingo Molnar" <mingo@elte.hu>
Subject: Re: nanosleep() uses CLOCK_MONOTONIC, should be CLOCK_REALTIME?
Date: Tue, 24 Jun 2008 11:31:03 +0200 [thread overview]
Message-ID: <cfd18e0f0806240231j3dd95c5fs86af59b9c92d9f76@mail.gmail.com> (raw)
In-Reply-To: <e2e108260806240227s659fb238t3a105f095773095a@mail.gmail.com>
On Tue, Jun 24, 2008 at 11:27 AM, Bart Van Assche
<bart.vanassche@gmail.com> wrote:
>>> nor by adjtimex() (this last one is used by ntpd).
>>
>> That surprised me a little. So gradual adjustments to the time made
>> by adjtime() / adjtimex() really don't affect nanosleep()?
>
> Does the adjtime() system call still exist ? I could not find any
> information about this system call in the 2.6.25 kernel source code.
It's the glibc interface on top of adtimex(). (Sorry, maybe I should
have writte andjtime(3) to be clearer.)
> Frequency adjustments made via the adjtimex() system call do affect
> nanosleep() of course (via timex::freq and/or timex::tick). Stepwise
> time adjustments, whether gradual or not, should not affect
> nanosleep().
Ahhh good -- that makes sense. Thanks for that info.
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
man-pages online: http://www.kernel.org/doc/man-pages/online_pages.html
Found a bug? http://www.kernel.org/doc/man-pages/reporting_bugs.html
next prev parent reply other threads:[~2008-06-24 9:31 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-22 7:35 Michael Kerrisk
2008-06-23 8:34 ` Bart Van Assche
2008-06-23 9:48 ` Michael Kerrisk
2008-06-23 11:56 ` Bart Van Assche
2008-06-24 5:08 ` Michael Kerrisk
2008-06-24 5:18 ` Michael Kerrisk
2008-06-23 12:43 ` Roman Zippel
2008-06-24 5:39 ` Michael Kerrisk
2008-06-24 8:01 ` Bart Van Assche
2008-06-24 8:27 ` Michael Kerrisk
2008-06-24 9:27 ` Bart Van Assche
2008-06-24 9:31 ` Michael Kerrisk [this message]
2008-06-25 6:13 ` Thomas Gleixner
2008-06-25 6:16 ` Michael Kerrisk
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