mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 10:17:48 +07:00
5a2d6880f4
The <linux/sched/loadavg.h> file is a self-contained header and users of it either don't need <linux/sched.h> - or have already included it. This reduces the size of the header dependency graph. Acked-by: Linus 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: Ingo Molnar <mingo@kernel.org>
32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
#ifndef _LINUX_SCHED_LOADAVG_H
|
|
#define _LINUX_SCHED_LOADAVG_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 */
|