1 /*
2 * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
3 *
4 * Licensed under the terms of the GNU GPL License version 2.
5 *
6 */
7
8 #ifndef __CPUIDLE_INFO_HW__
9 #define __CPUIDLE_INFO_HW__
10
11 #include <stdarg.h>
12 #include <time.h>
13
14 #include "idle_monitor/idle_monitors.h"
15
16 #define MONITORS_MAX 20
17 #define MONITOR_NAME_LEN 20
18 #define CSTATE_NAME_LEN 5
19 #define CSTATE_DESC_LEN 60
20
21 extern int cpu_count;
22
23 /* Hard to define the right names ...: */
24 enum power_range_e {
25 RANGE_THREAD, /* Lowest in topology hierarcy, AMD: core, Intel: thread
26 kernel sysfs: cpu */
27 RANGE_CORE, /* AMD: unit, Intel: core, kernel_sysfs: core_id */
28 RANGE_PACKAGE, /* Package, processor socket */
29 RANGE_MACHINE, /* Machine, platform wide */
30 RANGE_MAX };
31
32 typedef struct cstate {
33 int id;
34 enum power_range_e range;
35 char name[CSTATE_NAME_LEN];
36 char desc[CSTATE_DESC_LEN];
37
38 /* either provide a percentage or a general count */
39 int (*get_count_percent)(unsigned int self_id, double *percent,
40 unsigned int cpu);
41 int (*get_count)(unsigned int self_id, unsigned long long *count,
42 unsigned int cpu);
43 } cstate_t;
44
45 struct cpuidle_monitor {
46 /* Name must not contain whitespaces */
47 char name[MONITOR_NAME_LEN];
48 int name_len;
49 int hw_states_num;
50 cstate_t *hw_states;
51 int (*start) (void);
52 int (*stop) (void);
53 struct cpuidle_monitor* (*do_register) (void);
54 void (*unregister)(void);
55 unsigned int overflow_s;
56 int needs_root;
57 };
58
59 extern long long timespec_diff_us(struct timespec start, struct timespec end);
60
61 #define print_overflow_err(mes, ov) \
62 { \
63 fprintf(stderr, gettext("Measure took %u seconds, but registers could " \
64 "overflow at %u seconds, results " \
65 "could be inaccurate\n"), mes, ov); \
66 }
67
68
69 /* Taken over from x86info project sources -> return 0 on success */
70 #include <sched.h>
71 #include <sys/types.h>
72 #include <unistd.h>
bind_cpu(int cpu)73 static inline int bind_cpu(int cpu)
74 {
75 cpu_set_t set;
76
77 if (sched_getaffinity(getpid(), sizeof(set), &set) == 0) {
78 CPU_ZERO(&set);
79 CPU_SET(cpu, &set);
80 return sched_setaffinity(getpid(), sizeof(set), &set);
81 }
82 return 1;
83 }
84
85 #endif /* __CPUIDLE_INFO_HW__ */
86