From: Arjan van de Ven <arjanv@redhat.com>
To: Jamie Lokier <jamie@shareable.org>
Cc: Albert Cahalan <albert@users.sourceforge.net>,
"Randy.Dunlap" <rddunlap@osdl.org>,
Peter Williams <peterw@aurema.com>,
ak@muc.de, Richard.Curnow@superh.com, aeb@cwi.nl,
linux-kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: finding out the value of HZ from userspace
Date: Thu, 1 Apr 2004 18:01:32 +0200 [thread overview]
Message-ID: <20040401160132.GB13294@devserv.devel.redhat.com> (raw)
In-Reply-To: <20040401155420.GB25502@mail.shareable.org>
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On Thu, Apr 01, 2004 at 04:54:20PM +0100, Jamie Lokier wrote:
> Albert Cahalan wrote:
> > If you rely on sysconf(_SC_CLK_TCK) to work, then
> > your software will support:
> >
> > * all systems with a 2.6.xx kernel
> > * all systems with a 2.4.xx kernel and recent glibc
> > * all i386 systems running with the default HZ
> >
> > That's quite a bit I suppose. Maybe you have no
> > interest in supporting a 1200 HZ Alpha with an old
> > kernel or glibc. Maybe you don't care about somebody
> > running a 2.2.xx kernel with modified HZ.
>
> I'm still unclear. Does sysconf(_SC_CLK_TCK), when it is reliable,
> return HZ or USER_HZ?
USER_HZ; the value all the userspace interfaces are in.
HZ doesn't mean nothing, esp when we go to a tickless kernel...
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next prev parent reply other threads:[~2004-04-01 16:02 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-16 16:14 finding out the value of HZ from userspace Albert Cahalan
2004-03-16 17:22 ` Richard Curnow
2004-03-20 9:56 ` Arjan van de Ven
2004-03-20 14:54 ` Albert Cahalan
2004-03-20 23:58 ` Peter Williams
2004-03-31 21:40 ` Randy.Dunlap
2004-03-31 23:46 ` Albert Cahalan
2004-04-01 15:54 ` Jamie Lokier
2004-04-01 16:01 ` Arjan van de Ven [this message]
2004-04-01 16:30 ` Jamie Lokier
2004-04-01 16:50 ` Richard B. Johnson
2004-04-01 17:01 ` Jamie Lokier
2004-04-01 21:27 ` Michael Buesch
2004-04-02 0:16 ` Peter Williams
2004-04-02 0:07 ` Peter Williams
2004-04-02 0:39 ` Jamie Lokier
2004-04-02 1:44 ` Peter Williams
2004-04-02 18:28 ` Tim Bird
2004-04-02 22:05 ` Peter Williams
2004-04-01 16:12 ` Albert Cahalan
[not found] <1zkOe-Uc-17@gated-at.bofh.it>
[not found] ` <1zl7M-1eJ-43@gated-at.bofh.it>
[not found] ` <1zn9p-3mW-5@gated-at.bofh.it>
[not found] ` <1znj5-3wM-15@gated-at.bofh.it>
[not found] ` <1AaWr-655-7@gated-at.bofh.it>
2004-03-16 2:27 ` Andi Kleen
2004-03-16 5:53 ` Peter Williams
2004-03-16 6:16 ` Andi Kleen
2004-03-16 23:15 ` Peter Williams
2004-03-16 23:56 ` Andi Kleen
2004-03-17 0:15 ` Peter Williams
2004-03-16 9:16 ` Bernd Petrovitsch
2004-03-16 23:45 ` Peter Williams
[not found] <michf@post.tau.ac.il>
2004-03-11 14:17 ` Micha Feigin
2004-03-13 17:24 ` Arjan van de Ven
2004-03-13 19:34 ` John Reiser
2004-03-13 19:38 ` Arjan van de Ven
2004-03-13 22:14 ` Micha Feigin
2004-03-13 22:32 ` Arjan van de Ven
2004-03-14 1:05 ` Micha Feigin
2004-03-14 1:49 ` Andrew Morton
2004-03-14 14:37 ` Micha Feigin
2004-03-16 0:28 ` Peter Williams
2004-03-16 6:33 ` Arjan van de Ven
2004-03-16 23:38 ` Peter Williams
2004-03-20 10:22 ` Arjan van de Ven
2004-03-20 11:28 ` Stefan Smietanowski
2004-03-20 11:41 ` Arjan van de Ven
2004-03-20 23:58 ` Peter Williams
2004-03-21 1:09 ` Tim Schmielau
2004-03-21 1:30 ` Peter Williams
2004-03-21 8:00 ` Kai Henningsen
2004-03-21 10:32 ` Stefan Smietanowski
2004-03-22 22:34 ` Micha Feigin
2004-03-22 23:04 ` Peter Williams
2004-03-25 17:40 ` Jamie Lokier
2004-03-25 23:22 ` Peter Williams
2004-03-27 13:31 ` Jamie Lokier
2004-03-27 23:52 ` Peter Williams
2004-03-28 12:16 ` Jamie Lokier
2004-03-27 21:11 ` Micha Feigin
2004-03-20 23:26 ` Peter Williams
2004-03-13 21:19 ` tabris
2004-03-13 22:10 ` Micha Feigin
2004-03-13 22:41 ` Arjan van de Ven
2004-03-14 1:07 ` Micha Feigin
2004-03-14 18:26 ` John Reiser
2004-03-14 2:45 ` Horst von Brand
2004-03-14 14:39 ` Micha Feigin
2004-03-15 8:17 ` Jamie Lokier
2004-03-16 18:16 ` Mark Gross
2004-03-15 10:13 ` Richard Curnow
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