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Commit dea38c74 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

sched/headers: Move loadavg related definitions from <linux/sched.h> to <linux/sched/loadavg.h> 



Move these bits to <linux/sched/loadavg.h>, to reduce the size and
complexity of <linux/sched.h>.

Acked-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent e2d1e2ae

include/linux/sched.h

+0 −27
Original line number Diff line number Diff line
@@ -71,31 +71,6 @@ struct blk_plug; 
struct filename;

struct nameidata;



/*

 * These are the constant used to fake the fixed-point load-average

 * counting. Some notes:

 *  - 11 bit fractions expand to 22 bits by the multiplies: this gives

 *    a load-average precision of 10 bits integer + 11 bits fractional

 *  - if you want to count load-averages more often, you need more

 *    precision, or rounding will get you. With 2-second counting freq,

 *    the EXP_n values would be 1981, 2034 and 2043 if still using only

 *    11 bit fractions.

 */

extern unsigned long avenrun[];		/* Load averages */

extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);



#define FSHIFT		11		/* nr of bits of precision */

#define FIXED_1		(1<<FSHIFT)	/* 1.0 as fixed-point */

#define LOAD_FREQ	(5*HZ+1)	/* 5 sec intervals */

#define EXP_1		1884		/* 1/exp(5sec/1min) as fixed-point */

#define EXP_5		2014		/* 1/exp(5sec/5min) */

#define EXP_15		2037		/* 1/exp(5sec/15min) */



#define CALC_LOAD(load,exp,n) \

	load *= exp; \

	load += n*(FIXED_1-exp); \

	load >>= FSHIFT;



extern unsigned long total_forks;

extern int nr_threads;

DECLARE_PER_CPU(unsigned long, process_counts);
@@ -106,8 +81,6 @@ extern unsigned long nr_iowait(void); 
extern unsigned long nr_iowait_cpu(int cpu);

extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);



extern void calc_global_load(unsigned long ticks);



#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)

extern void cpu_load_update_nohz_start(void);

extern void cpu_load_update_nohz_stop(void);

include/linux/sched/loadavg.h

+27 −0
Original line number Diff line number Diff line
@@ -3,4 +3,31 @@ 


#include <linux/sched.h>



/*

 * These are the constant used to fake the fixed-point load-average

 * counting. Some notes:

 *  - 11 bit fractions expand to 22 bits by the multiplies: this gives

 *    a load-average precision of 10 bits integer + 11 bits fractional

 *  - if you want to count load-averages more often, you need more

 *    precision, or rounding will get you. With 2-second counting freq,

 *    the EXP_n values would be 1981, 2034 and 2043 if still using only

 *    11 bit fractions.

 */

extern unsigned long avenrun[];		/* Load averages */

extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);



#define FSHIFT		11		/* nr of bits of precision */

#define FIXED_1		(1<<FSHIFT)	/* 1.0 as fixed-point */

#define LOAD_FREQ	(5*HZ+1)	/* 5 sec intervals */

#define EXP_1		1884		/* 1/exp(5sec/1min) as fixed-point */

#define EXP_5		2014		/* 1/exp(5sec/5min) */

#define EXP_15		2037		/* 1/exp(5sec/15min) */



#define CALC_LOAD(load,exp,n) \

	load *= exp; \

	load += n*(FIXED_1-exp); \

	load >>= FSHIFT;



extern void calc_global_load(unsigned long ticks);



#endif /* _LINUX_SCHED_LOADAVG_H */