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review.evervolv.com / android_kernel_htc_msm8960 / bcbcb37cdb67d8100acfa66df40c4d636c28c4d1 / . / Documentation / perf_counter / perfcounters.h
blob: 32e24b9154ab69ab2a16a219bad2c4b117151457 [file] [log] [blame]
Wu Fengguangcea92ce2009-03-20 10:08:02 +0800[diff] [blame]1/*
2 * Ioctls that can be done on a perf counter fd:
3 */
4#define PERF_COUNTER_IOC_ENABLE _IO('$', 0)
5#define PERF_COUNTER_IOC_DISABLE _IO('$', 1)
6
7/*
8 * prctl(PR_TASK_PERF_COUNTERS_DISABLE) will (cheaply) disable all
9 * counters in the current task.
10 */
11#define PR_TASK_PERF_COUNTERS_DISABLE 31
12#define PR_TASK_PERF_COUNTERS_ENABLE 32
13
Wu Fengguangcea92ce2009-03-20 10:08:02 +0800[diff] [blame]14#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
15
Wu Fengguangf49012f2009-03-20 10:08:03 +0800[diff] [blame]16#define rdclock() \
17({ \
18 struct timespec ts; \
19 \
20 clock_gettime(CLOCK_MONOTONIC, &ts); \
21 ts.tv_sec * 1000000000ULL + ts.tv_nsec; \
22})
23
Wu Fengguangcea92ce2009-03-20 10:08:02 +0800[diff] [blame]24/*
25 * Pick up some kernel type conventions:
26 */
27#define __user
28#define asmlinkage
29
30typedef unsigned int __u32;
31typedef unsigned long long __u64;
32typedef long long __s64;
33
34/*
35 * User-space ABI bits:
36 */
37
38/*
39 * Generalized performance counter event types, used by the hw_event.type
40 * parameter of the sys_perf_counter_open() syscall:
41 */
42enum hw_event_types {
43 /*
44 * Common hardware events, generalized by the kernel:
45 */
46 PERF_COUNT_CPU_CYCLES = 0,
47 PERF_COUNT_INSTRUCTIONS = 1,
48 PERF_COUNT_CACHE_REFERENCES = 2,
49 PERF_COUNT_CACHE_MISSES = 3,
50 PERF_COUNT_BRANCH_INSTRUCTIONS = 4,
51 PERF_COUNT_BRANCH_MISSES = 5,
52 PERF_COUNT_BUS_CYCLES = 6,
53
54 PERF_HW_EVENTS_MAX = 7,
55
56 /*
57 * Special "software" counters provided by the kernel, even if
58 * the hardware does not support performance counters. These
59 * counters measure various physical and sw events of the
60 * kernel (and allow the profiling of them as well):
61 */
62 PERF_COUNT_CPU_CLOCK = -1,
63 PERF_COUNT_TASK_CLOCK = -2,
64 PERF_COUNT_PAGE_FAULTS = -3,
65 PERF_COUNT_CONTEXT_SWITCHES = -4,
66 PERF_COUNT_CPU_MIGRATIONS = -5,
67
68 PERF_SW_EVENTS_MIN = -6,
69};
70
71/*
72 * IRQ-notification data record type:
73 */
74enum perf_counter_record_type {
75 PERF_RECORD_SIMPLE = 0,
76 PERF_RECORD_IRQ = 1,
77 PERF_RECORD_GROUP = 2,
78};
79
80/*
81 * Hardware event to monitor via a performance monitoring counter:
82 */
83struct perf_counter_hw_event {
84 __s64 type;
85
86 __u64 irq_period;
87 __u64 record_type;
88 __u64 read_format;
89
90 __u64 disabled : 1, /* off by default */
91 nmi : 1, /* NMI sampling */
92 raw : 1, /* raw event type */
93 inherit : 1, /* children inherit it */
94 pinned : 1, /* must always be on PMU */
95 exclusive : 1, /* only group on PMU */
96 exclude_user : 1, /* don't count user */
97 exclude_kernel : 1, /* ditto kernel */
98 exclude_hv : 1, /* ditto hypervisor */
99 exclude_idle : 1, /* don't count when idle */
100
101 __reserved_1 : 54;
102
103 __u32 extra_config_len;
104 __u32 __reserved_4;
105
106 __u64 __reserved_2;
107 __u64 __reserved_3;
108};
109
Wu Fengguangf7524bd2009-03-20 10:08:06 +0800[diff] [blame]110
Wu Fengguangcea92ce2009-03-20 10:08:02 +0800[diff] [blame]111#ifdef __x86_64__
112# define __NR_perf_counter_open 295
113#endif
114
115#ifdef __i386__
116# define __NR_perf_counter_open 333
117#endif
118
119#ifdef __powerpc__
120#define __NR_perf_counter_open 319
121#endif
122
123asmlinkage int sys_perf_counter_open(
124
125 struct perf_counter_hw_event *hw_event_uptr __user,
126 pid_t pid,
127 int cpu,
128 int group_fd,
129 unsigned long flags)
130{
131 int ret;
132
133 ret = syscall(
134 __NR_perf_counter_open, hw_event_uptr, pid, cpu, group_fd, flags);
135#if defined(__x86_64__) || defined(__i386__)
136 if (ret < 0 && ret > -4096) {
137 errno = -ret;
138 ret = -1;
139 }
140#endif
141 return ret;
142}