From: Coywolf Qi Hunt <coywolf@gmail.com>
To: markh@compro.net
Cc: linux-kernel@vger.kernel.org
Subject: Re: HZ question
Date: Wed, 14 Sep 2005 12:00:23 +0800 [thread overview]
Message-ID: <2cd57c9005091321006825540@mail.gmail.com> (raw)
In-Reply-To: <4326CAB3.6020109@compro.net>
On 9/13/05, Mark Hounschell <markh@compro.net> wrote:
> I need to know the kernels value of HZ in a userland app.
>
> getconf CLK_TCK
> and
> hz = sysconf (_SC_CLK_TCK)
>
> both seem to return CLOCKS_PER_SEC which is defined as USER_HZ which is
> defined as 100.
>
> include/asm/param.h:
>
> #ifdef __KERNEL__
> # define HZ 1000 /* Internal kernel timer frequency */
> # define USER_HZ 100 /* .. some user interfaces are in "ticks" */
> # define CLOCKS_PER_SEC (USER_HZ) /* like times() */
> #endif
>
> Thanks in advance for any help
> Mark
simply zgrep HZ= /proc/config.gz
on my box, I get CONFIG_HZ=1000
--
Coywolf Qi Hunt
http://sosdg.org/~coywolf/
next prev parent reply other threads:[~2005-09-14 4:00 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-13 12:48 HZ question Mark Hounschell
2005-09-13 13:46 ` linux-os (Dick Johnson)
2005-09-13 14:00 ` Mark Hounschell
2005-09-13 14:20 ` Tim Schmielau
2005-09-13 15:05 ` Mark Hounschell
2005-09-13 16:01 ` Tim Schmielau
2005-09-13 16:41 ` Mark Hounschell
2005-09-13 16:47 ` Mark Hounschell
2005-09-13 18:38 ` Stefan Smietanowski
2005-09-13 19:17 ` Mark Hounschell
2005-09-13 23:19 ` Daniel Barkalow
2005-09-13 17:34 ` john stultz
2005-09-13 19:15 ` Mark Hounschell
2005-09-14 4:15 ` George Anzinger
2005-09-13 20:13 ` jdow
2005-09-13 20:38 ` linux-os (Dick Johnson)
2005-09-15 1:29 ` Lee Revell
2005-09-13 14:07 ` Tim Schmielau
2005-09-14 4:00 ` Coywolf Qi Hunt [this message]
2005-09-15 1:20 ` Lee Revell
2005-09-15 16:16 ` Joe Bob Spamtest
2005-09-15 20:19 ` Valdis.Kletnieks
2005-09-15 20:34 ` Jesper Juhl
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