kernel-ark/include/asm-ia64/param.h
Christoph Lameter b5d23e5b8c [PATCH] ia64: Selectable Timer Interrupt Frequency
It allows a selectable timer interrupt frequency of 100, 250 and 1000 HZ.
Reducing the timer frequency may have important performance benefits on
large systems.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23 09:45:10 -07:00

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C

#ifndef _ASM_IA64_PARAM_H
#define _ASM_IA64_PARAM_H
/*
* Fundamental kernel parameters.
*
* Based on <asm-i386/param.h>.
*
* Modified 1998, 1999, 2002-2003
* David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
*/
#define EXEC_PAGESIZE 65536
#ifndef NOGROUP
# define NOGROUP (-1)
#endif
#define MAXHOSTNAMELEN 64 /* max length of hostname */
#ifdef __KERNEL__
# include <linux/config.h> /* mustn't include <linux/config.h> outside of #ifdef __KERNEL__ */
# ifdef CONFIG_IA64_HP_SIM
/*
* Yeah, simulating stuff is slow, so let us catch some breath between
* timer interrupts...
*/
# define HZ 32
# else
# define HZ CONFIG_HZ
# endif
# define USER_HZ HZ
# define CLOCKS_PER_SEC HZ /* frequency at which times() counts */
#else
/*
* Technically, this is wrong, but some old apps still refer to it. The proper way to
* get the HZ value is via sysconf(_SC_CLK_TCK).
*/
# define HZ 1024
#endif
#endif /* _ASM_IA64_PARAM_H */