summaryrefslogblamecommitdiff
path: root/include/linux/average.h
blob: c6028fd742c1a18309a323a016e3be076d9b13be (plain) (tree) 
c5485a7e7569 ^



c5485a7e7569 ^























af5568843594 ^

c5485a7e7569 ^



1
2
3

4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

27

28
29
30



                        






















                                                                  
                                            


                             
#ifndef _LINUX_AVERAGE_H
#define _LINUX_AVERAGE_H

/* Exponentially weighted moving average (EWMA) */

/* For more documentation see lib/average.c */

struct ewma {
	unsigned long internal;
	unsigned long factor;
	unsigned long weight;
};

extern void ewma_init(struct ewma *avg, unsigned long factor,
		      unsigned long weight);

extern struct ewma *ewma_add(struct ewma *avg, unsigned long val);

/**
 * ewma_read() - Get average value
 * @avg: Average structure
 *
 * Returns the average value held in @avg.
 */
static inline unsigned long ewma_read(const struct ewma *avg)
{
	return avg->internal >> avg->factor;
}

#endif /* _LINUX_AVERAGE_H */