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