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
19 /* CSTATE_NAME_LEN is limited by header field width defined
20 * in cpupower-monitor.c. Header field width is defined to be
21 * sum of percent width and two spaces for padding.
22 */
23 #ifdef __powerpc__
24 #define CSTATE_NAME_LEN 7
25 #else
26 #define CSTATE_NAME_LEN 5
27 #endif
28 #define CSTATE_DESC_LEN 60
29
30 int cpu_count;
31
32 /* Hard to define the right names ...: */
33 enum power_range_e {
34 RANGE_THREAD, /* Lowest in topology hierarcy, AMD: core, Intel: thread
35 kernel sysfs: cpu */
36 RANGE_CORE, /* AMD: unit, Intel: core, kernel_sysfs: core_id */
37 RANGE_PACKAGE, /* Package, processor socket */
38 RANGE_MACHINE, /* Machine, platform wide */
39 RANGE_MAX };
40
41 typedef struct cstate {
42 int id;
43 enum power_range_e range;
44 char name[CSTATE_NAME_LEN];
45 char desc[CSTATE_DESC_LEN];
46
47 /* either provide a percentage or a general count */
48 int (*get_count_percent)(unsigned int self_id, double *percent,
49 unsigned int cpu);
50 int (*get_count)(unsigned int self_id, unsigned long long *count,
51 unsigned int cpu);
52 } cstate_t;
53
54 struct cpuidle_monitor {
55 /* Name must not contain whitespaces */
56 char name[MONITOR_NAME_LEN];
57 int name_len;
58 int hw_states_num;
59 cstate_t *hw_states;
60 int (*start) (void);
61 int (*stop) (void);
62 struct cpuidle_monitor* (*do_register) (void);
63 void (*unregister)(void);
64 unsigned int overflow_s;
65 int needs_root;
66 };
67
68 extern long long timespec_diff_us(struct timespec start, struct timespec end);
69
70 #define print_overflow_err(mes, ov) \
71 { \
72 fprintf(stderr, gettext("Measure took %u seconds, but registers could " \
73 "overflow at %u seconds, results " \
74 "could be inaccurate\n"), mes, ov); \
75 }
76
77
78 /* Taken over from x86info project sources -> return 0 on success */
79 #include <sched.h>
80 #include <sys/types.h>
81 #include <unistd.h>
bind_cpu(int cpu)82 static inline int bind_cpu(int cpu)
83 {
84 cpu_set_t set;
85
86 if (sched_getaffinity(getpid(), sizeof(set), &set) == 0) {
87 CPU_ZERO(&set);
88 CPU_SET(cpu, &set);
89 return sched_setaffinity(getpid(), sizeof(set), &set);
90 }
91 return 1;
92 }
93
94 #endif /* __CPUIDLE_INFO_HW__ */
95
