blob: 6a5bb052fcc27f3820ddfc095f89100f8f5f12cb (
plain)
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
31
32
33
34
35
36
37
38
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* win_minmax.h: windowed min/max tracker by Kathleen Nichols.
*
*/
#ifndef MINMAX_H
#define MINMAX_H
#include <linux/types.h>
/* A single data point for our parameterized min-max tracker */
struct minmax_sample {
u32 t; /* time measurement was taken */
u32 v; /* value measured */
};
/* State for the parameterized min-max tracker */
struct minmax {
struct minmax_sample s[3];
};
static inline u32 minmax_get(const struct minmax *m)
{
return m->s[0].v;
}
static inline u32 minmax_reset(struct minmax *m, u32 t, u32 meas)
{
struct minmax_sample val = { .t = t, .v = meas };
m->s[2] = m->s[1] = m->s[0] = val;
return m->s[0].v;
}
u32 minmax_running_max(struct minmax *m, u32 win, u32 t, u32 meas);
u32 minmax_running_min(struct minmax *m, u32 win, u32 t, u32 meas);
#endif
|
