linux源码分析之节拍率 -- param.h

标签：linux   ubuntu   源码   内核   能耗   

#ifndef __ASM_PARAM_H
#define __ASM_PARAM_H

#ifdef __KERNEL__
# define HZ             CONFIG_HZ       /* Internal kernel timer frequency */
# define USER_HZ        100             /* User interfaces are in "ticks" */
# define CLOCKS_PER_SEC (USER_HZ)       /* like times() */
#else
# define HZ             100
#endif

#define EXEC_PAGESIZE   4096

#ifndef NOGROUP
#define NOGROUP         (-1)
#endif

/* max length of hostname */
#define MAXHOSTNAMELEN  64

#endif

#include <asm-generic/param.h>

文件路径：/include/asm-generic/param.h

#ifndef __ASM_GENERIC_PARAM_H
#define __ASM_GENERIC_PARAM_H


#ifndef HZ
#define HZ 100
#endif

#ifndef EXEC_PAGESIZE
#define EXEC_PAGESIZE   4096
#endif

#ifndef NOGROUP
#define NOGROUP         (-1)
#endif

#define MAXHOSTNAMELEN  64      /* max length of hostname */

#endif /* __ASM_GENERIC_PARAM_H */

#ifndef _ASM_ALPHA_PARAM_H
#define _ASM_ALPHA_PARAM_H

#ifdef __KERNEL__
#define HZ              CONFIG_HZ
#define USER_HZ         HZ
#else
#define HZ              1024
#endif

#define EXEC_PAGESIZE   8192

#ifndef NOGROUP
#define NOGROUP         (-1)
#endif

#define MAXHOSTNAMELEN  64      /* max length of hostname */

#ifdef __KERNEL__
# define CLOCKS_PER_SEC HZ      /* frequency at which times() counts */
#endif

#endif /* _ASM_ALPHA_PARAM_H */

linux源码分析之节拍率 -- param.h

标签：linux   ubuntu   源码   内核   能耗   

原文地址：http://blog.csdn.net/liuruiqun/article/details/45950049