Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Performance counters: |
| 3 | * |
| 4 | * Copyright(C) 2008, Thomas Gleixner <tglx@linutronix.de> |
| 5 | * Copyright(C) 2008, Red Hat, Inc., Ingo Molnar |
| 6 | * |
| 7 | * Data type definitions, declarations, prototypes. |
| 8 | * |
| 9 | * Started by: Thomas Gleixner and Ingo Molnar |
| 10 | * |
| 11 | * For licencing details see kernel-base/COPYING |
| 12 | */ |
| 13 | #ifndef _LINUX_PERF_COUNTER_H |
| 14 | #define _LINUX_PERF_COUNTER_H |
| 15 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 16 | #include <linux/types.h> |
| 17 | #include <linux/ioctl.h> |
Paul Mackerras | 9aaa131 | 2009-03-21 15:31:47 +1100 | [diff] [blame] | 18 | #include <asm/byteorder.h> |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 19 | |
| 20 | /* |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 21 | * User-space ABI bits: |
| 22 | */ |
| 23 | |
| 24 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 25 | * attr.type |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 26 | */ |
| 27 | enum perf_event_types { |
| 28 | PERF_TYPE_HARDWARE = 0, |
| 29 | PERF_TYPE_SOFTWARE = 1, |
| 30 | PERF_TYPE_TRACEPOINT = 2, |
| 31 | |
| 32 | /* |
| 33 | * available TYPE space, raw is the max value. |
| 34 | */ |
| 35 | |
| 36 | PERF_TYPE_RAW = 128, |
| 37 | }; |
| 38 | |
| 39 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 40 | * Generalized performance counter event types, used by the attr.event_id |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 41 | * parameter of the sys_perf_counter_open() syscall: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 42 | */ |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 43 | enum attr_ids { |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 44 | /* |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 45 | * Common hardware events, generalized by the kernel: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 46 | */ |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 47 | PERF_COUNT_CPU_CYCLES = 0, |
| 48 | PERF_COUNT_INSTRUCTIONS = 1, |
| 49 | PERF_COUNT_CACHE_REFERENCES = 2, |
| 50 | PERF_COUNT_CACHE_MISSES = 3, |
| 51 | PERF_COUNT_BRANCH_INSTRUCTIONS = 4, |
| 52 | PERF_COUNT_BRANCH_MISSES = 5, |
| 53 | PERF_COUNT_BUS_CYCLES = 6, |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 54 | |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 55 | PERF_HW_EVENTS_MAX = 7, |
| 56 | }; |
Ingo Molnar | 6c594c2 | 2008-12-14 12:34:15 +0100 | [diff] [blame] | 57 | |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 58 | /* |
| 59 | * Special "software" counters provided by the kernel, even if the hardware |
| 60 | * does not support performance counters. These counters measure various |
| 61 | * physical and sw events of the kernel (and allow the profiling of them as |
| 62 | * well): |
| 63 | */ |
| 64 | enum sw_event_ids { |
| 65 | PERF_COUNT_CPU_CLOCK = 0, |
| 66 | PERF_COUNT_TASK_CLOCK = 1, |
| 67 | PERF_COUNT_PAGE_FAULTS = 2, |
| 68 | PERF_COUNT_CONTEXT_SWITCHES = 3, |
| 69 | PERF_COUNT_CPU_MIGRATIONS = 4, |
| 70 | PERF_COUNT_PAGE_FAULTS_MIN = 5, |
| 71 | PERF_COUNT_PAGE_FAULTS_MAJ = 6, |
Ingo Molnar | 6c594c2 | 2008-12-14 12:34:15 +0100 | [diff] [blame] | 72 | |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 73 | PERF_SW_EVENTS_MAX = 7, |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 74 | }; |
| 75 | |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 76 | #define __PERF_COUNTER_MASK(name) \ |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 77 | (((1ULL << PERF_COUNTER_##name##_BITS) - 1) << \ |
| 78 | PERF_COUNTER_##name##_SHIFT) |
| 79 | |
| 80 | #define PERF_COUNTER_RAW_BITS 1 |
| 81 | #define PERF_COUNTER_RAW_SHIFT 63 |
| 82 | #define PERF_COUNTER_RAW_MASK __PERF_COUNTER_MASK(RAW) |
| 83 | |
| 84 | #define PERF_COUNTER_CONFIG_BITS 63 |
| 85 | #define PERF_COUNTER_CONFIG_SHIFT 0 |
| 86 | #define PERF_COUNTER_CONFIG_MASK __PERF_COUNTER_MASK(CONFIG) |
| 87 | |
| 88 | #define PERF_COUNTER_TYPE_BITS 7 |
| 89 | #define PERF_COUNTER_TYPE_SHIFT 56 |
| 90 | #define PERF_COUNTER_TYPE_MASK __PERF_COUNTER_MASK(TYPE) |
| 91 | |
| 92 | #define PERF_COUNTER_EVENT_BITS 56 |
| 93 | #define PERF_COUNTER_EVENT_SHIFT 0 |
| 94 | #define PERF_COUNTER_EVENT_MASK __PERF_COUNTER_MASK(EVENT) |
| 95 | |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 96 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 97 | * Bits that can be set in attr.sample_type to request information |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 98 | * in the overflow packets. |
| 99 | */ |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 100 | enum perf_counter_sample_format { |
| 101 | PERF_SAMPLE_IP = 1U << 0, |
| 102 | PERF_SAMPLE_TID = 1U << 1, |
| 103 | PERF_SAMPLE_TIME = 1U << 2, |
| 104 | PERF_SAMPLE_ADDR = 1U << 3, |
| 105 | PERF_SAMPLE_GROUP = 1U << 4, |
| 106 | PERF_SAMPLE_CALLCHAIN = 1U << 5, |
| 107 | PERF_SAMPLE_CONFIG = 1U << 6, |
| 108 | PERF_SAMPLE_CPU = 1U << 7, |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 109 | }; |
| 110 | |
| 111 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 112 | * Bits that can be set in attr.read_format to request that |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 113 | * reads on the counter should return the indicated quantities, |
| 114 | * in increasing order of bit value, after the counter value. |
| 115 | */ |
| 116 | enum perf_counter_read_format { |
Peter Zijlstra | 8e5799b | 2009-06-02 15:08:15 +0200 | [diff] [blame] | 117 | PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0, |
| 118 | PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1, |
| 119 | PERF_FORMAT_ID = 1U << 2, |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 120 | }; |
| 121 | |
| 122 | /* |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 123 | * Hardware event to monitor via a performance monitoring counter: |
| 124 | */ |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 125 | struct perf_counter_attr { |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 126 | /* |
| 127 | * The MSB of the config word signifies if the rest contains cpu |
| 128 | * specific (raw) counter configuration data, if unset, the next |
| 129 | * 7 bits are an event type and the rest of the bits are the event |
| 130 | * identifier. |
| 131 | */ |
| 132 | __u64 config; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 133 | |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 134 | union { |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 135 | __u64 sample_period; |
| 136 | __u64 sample_freq; |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 137 | }; |
| 138 | |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 139 | __u64 sample_type; |
| 140 | __u64 read_format; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 141 | |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 142 | __u64 disabled : 1, /* off by default */ |
Paul Mackerras | 0475f9e | 2009-02-11 14:35:35 +1100 | [diff] [blame] | 143 | inherit : 1, /* children inherit it */ |
| 144 | pinned : 1, /* must always be on PMU */ |
| 145 | exclusive : 1, /* only group on PMU */ |
| 146 | exclude_user : 1, /* don't count user */ |
| 147 | exclude_kernel : 1, /* ditto kernel */ |
| 148 | exclude_hv : 1, /* ditto hypervisor */ |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 149 | exclude_idle : 1, /* don't count when idle */ |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 150 | mmap : 1, /* include mmap data */ |
| 151 | munmap : 1, /* include munmap data */ |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 152 | comm : 1, /* include comm data */ |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 153 | freq : 1, /* use freq, not period */ |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 154 | |
Peter Zijlstra | 8a016db | 2009-06-02 15:27:45 +0200 | [diff] [blame] | 155 | __reserved_1 : 52; |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 156 | |
Peter Zijlstra | c457810 | 2009-04-02 11:12:01 +0200 | [diff] [blame] | 157 | __u32 wakeup_events; /* wakeup every n events */ |
Peter Zijlstra | e527ea3 | 2009-05-25 14:45:25 +0200 | [diff] [blame] | 158 | __u32 __reserved_2; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 159 | |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 160 | __u64 __reserved_3; |
Peter Zijlstra | e527ea3 | 2009-05-25 14:45:25 +0200 | [diff] [blame] | 161 | __u64 __reserved_4; |
Thomas Gleixner | eab656a | 2008-12-08 19:26:59 +0100 | [diff] [blame] | 162 | }; |
| 163 | |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 164 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 165 | * Ioctls that can be done on a perf counter fd: |
| 166 | */ |
Peter Zijlstra | 08247e3 | 2009-06-02 16:46:57 +0200 | [diff] [blame] | 167 | #define PERF_COUNTER_IOC_ENABLE _IO ('$', 0) |
| 168 | #define PERF_COUNTER_IOC_DISABLE _IO ('$', 1) |
| 169 | #define PERF_COUNTER_IOC_REFRESH _IO ('$', 2) |
| 170 | #define PERF_COUNTER_IOC_RESET _IO ('$', 3) |
| 171 | #define PERF_COUNTER_IOC_PERIOD _IOW('$', 4, u64) |
Peter Zijlstra | 3df5eda | 2009-05-08 18:52:22 +0200 | [diff] [blame] | 172 | |
| 173 | enum perf_counter_ioc_flags { |
| 174 | PERF_IOC_FLAG_GROUP = 1U << 0, |
| 175 | }; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 176 | |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 177 | /* |
| 178 | * Structure of the page that can be mapped via mmap |
| 179 | */ |
| 180 | struct perf_counter_mmap_page { |
| 181 | __u32 version; /* version number of this structure */ |
| 182 | __u32 compat_version; /* lowest version this is compat with */ |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 183 | |
| 184 | /* |
| 185 | * Bits needed to read the hw counters in user-space. |
| 186 | * |
Peter Zijlstra | 92f22a3 | 2009-04-02 11:12:04 +0200 | [diff] [blame] | 187 | * u32 seq; |
| 188 | * s64 count; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 189 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 190 | * do { |
| 191 | * seq = pc->lock; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 192 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 193 | * barrier() |
| 194 | * if (pc->index) { |
| 195 | * count = pmc_read(pc->index - 1); |
| 196 | * count += pc->offset; |
| 197 | * } else |
| 198 | * goto regular_read; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 199 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 200 | * barrier(); |
| 201 | * } while (pc->lock != seq); |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 202 | * |
Peter Zijlstra | 92f22a3 | 2009-04-02 11:12:04 +0200 | [diff] [blame] | 203 | * NOTE: for obvious reason this only works on self-monitoring |
| 204 | * processes. |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 205 | */ |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 206 | __u32 lock; /* seqlock for synchronization */ |
| 207 | __u32 index; /* hardware counter identifier */ |
| 208 | __s64 offset; /* add to hardware counter value */ |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 209 | |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 210 | /* |
| 211 | * Control data for the mmap() data buffer. |
| 212 | * |
| 213 | * User-space reading this value should issue an rmb(), on SMP capable |
| 214 | * platforms, after reading this value -- see perf_counter_wakeup(). |
| 215 | */ |
Peter Zijlstra | 8e3747c | 2009-06-02 16:16:02 +0200 | [diff] [blame] | 216 | __u64 data_head; /* head in the data section */ |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 217 | }; |
| 218 | |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 219 | #define PERF_EVENT_MISC_CPUMODE_MASK (3 << 0) |
| 220 | #define PERF_EVENT_MISC_CPUMODE_UNKNOWN (0 << 0) |
Peter Zijlstra | 6b6e5486 | 2009-04-08 15:01:27 +0200 | [diff] [blame] | 221 | #define PERF_EVENT_MISC_KERNEL (1 << 0) |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 222 | #define PERF_EVENT_MISC_USER (2 << 0) |
| 223 | #define PERF_EVENT_MISC_HYPERVISOR (3 << 0) |
Peter Zijlstra | 6b6e5486 | 2009-04-08 15:01:27 +0200 | [diff] [blame] | 224 | #define PERF_EVENT_MISC_OVERFLOW (1 << 2) |
Peter Zijlstra | 6fab019 | 2009-04-08 15:01:26 +0200 | [diff] [blame] | 225 | |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 226 | struct perf_event_header { |
| 227 | __u32 type; |
Peter Zijlstra | 6fab019 | 2009-04-08 15:01:26 +0200 | [diff] [blame] | 228 | __u16 misc; |
| 229 | __u16 size; |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 230 | }; |
| 231 | |
| 232 | enum perf_event_type { |
Peter Zijlstra | 5ed0041 | 2009-03-30 19:07:12 +0200 | [diff] [blame] | 233 | |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 234 | /* |
| 235 | * The MMAP events record the PROT_EXEC mappings so that we can |
| 236 | * correlate userspace IPs to code. They have the following structure: |
| 237 | * |
| 238 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 239 | * struct perf_event_header header; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 240 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 241 | * u32 pid, tid; |
| 242 | * u64 addr; |
| 243 | * u64 len; |
| 244 | * u64 pgoff; |
| 245 | * char filename[]; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 246 | * }; |
| 247 | */ |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 248 | PERF_EVENT_MMAP = 1, |
| 249 | PERF_EVENT_MUNMAP = 2, |
Peter Zijlstra | ea5d20c | 2009-03-25 12:30:25 +0100 | [diff] [blame] | 250 | |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 251 | /* |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 252 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 253 | * struct perf_event_header header; |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 254 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 255 | * u32 pid, tid; |
| 256 | * char comm[]; |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 257 | * }; |
| 258 | */ |
| 259 | PERF_EVENT_COMM = 3, |
| 260 | |
| 261 | /* |
Peter Zijlstra | 26b119b | 2009-05-20 12:21:20 +0200 | [diff] [blame] | 262 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 263 | * struct perf_event_header header; |
| 264 | * u64 time; |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 265 | * u64 sample_period; |
Peter Zijlstra | 26b119b | 2009-05-20 12:21:20 +0200 | [diff] [blame] | 266 | * }; |
| 267 | */ |
| 268 | PERF_EVENT_PERIOD = 4, |
| 269 | |
| 270 | /* |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 271 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 272 | * struct perf_event_header header; |
| 273 | * u64 time; |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 274 | * }; |
| 275 | */ |
| 276 | PERF_EVENT_THROTTLE = 5, |
| 277 | PERF_EVENT_UNTHROTTLE = 6, |
| 278 | |
| 279 | /* |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame^] | 280 | * struct { |
| 281 | * struct perf_event_header header; |
| 282 | * u32 pid, ppid; |
| 283 | * }; |
| 284 | */ |
| 285 | PERF_EVENT_FORK = 7, |
| 286 | |
| 287 | /* |
Peter Zijlstra | 6b6e5486 | 2009-04-08 15:01:27 +0200 | [diff] [blame] | 288 | * When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field |
| 289 | * will be PERF_RECORD_* |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 290 | * |
| 291 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 292 | * struct perf_event_header header; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 293 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 294 | * { u64 ip; } && PERF_RECORD_IP |
| 295 | * { u32 pid, tid; } && PERF_RECORD_TID |
| 296 | * { u64 time; } && PERF_RECORD_TIME |
| 297 | * { u64 addr; } && PERF_RECORD_ADDR |
| 298 | * { u64 config; } && PERF_RECORD_CONFIG |
| 299 | * { u32 cpu, res; } && PERF_RECORD_CPU |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 300 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 301 | * { u64 nr; |
Peter Zijlstra | 8e5799b | 2009-06-02 15:08:15 +0200 | [diff] [blame] | 302 | * { u64 id, val; } cnt[nr]; } && PERF_RECORD_GROUP |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 303 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 304 | * { u16 nr, |
| 305 | * hv, |
| 306 | * kernel, |
| 307 | * user; |
| 308 | * u64 ips[nr]; } && PERF_RECORD_CALLCHAIN |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 309 | * }; |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 310 | */ |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 311 | }; |
| 312 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 313 | #ifdef __KERNEL__ |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 314 | /* |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 315 | * Kernel-internal data types and definitions: |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 316 | */ |
| 317 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 318 | #ifdef CONFIG_PERF_COUNTERS |
| 319 | # include <asm/perf_counter.h> |
| 320 | #endif |
| 321 | |
| 322 | #include <linux/list.h> |
| 323 | #include <linux/mutex.h> |
| 324 | #include <linux/rculist.h> |
| 325 | #include <linux/rcupdate.h> |
| 326 | #include <linux/spinlock.h> |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 327 | #include <linux/hrtimer.h> |
Peter Zijlstra | 3c446b3d | 2009-04-06 11:45:01 +0200 | [diff] [blame] | 328 | #include <linux/fs.h> |
Peter Zijlstra | 709e50c | 2009-06-02 14:13:15 +0200 | [diff] [blame] | 329 | #include <linux/pid_namespace.h> |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 330 | #include <asm/atomic.h> |
| 331 | |
| 332 | struct task_struct; |
| 333 | |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 334 | static inline u64 perf_event_raw(struct perf_counter_attr *attr) |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 335 | { |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 336 | return attr->config & PERF_COUNTER_RAW_MASK; |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 337 | } |
| 338 | |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 339 | static inline u64 perf_event_config(struct perf_counter_attr *attr) |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 340 | { |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 341 | return attr->config & PERF_COUNTER_CONFIG_MASK; |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 342 | } |
| 343 | |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 344 | static inline u64 perf_event_type(struct perf_counter_attr *attr) |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 345 | { |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 346 | return (attr->config & PERF_COUNTER_TYPE_MASK) >> |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 347 | PERF_COUNTER_TYPE_SHIFT; |
| 348 | } |
| 349 | |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 350 | static inline u64 perf_event_id(struct perf_counter_attr *attr) |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 351 | { |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 352 | return attr->config & PERF_COUNTER_EVENT_MASK; |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 353 | } |
| 354 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 355 | /** |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 356 | * struct hw_perf_counter - performance counter hardware details: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 357 | */ |
| 358 | struct hw_perf_counter { |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 359 | #ifdef CONFIG_PERF_COUNTERS |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 360 | union { |
| 361 | struct { /* hardware */ |
| 362 | u64 config; |
| 363 | unsigned long config_base; |
| 364 | unsigned long counter_base; |
Robert Richter | 6f00cad | 2009-04-29 12:47:17 +0200 | [diff] [blame] | 365 | int idx; |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 366 | }; |
| 367 | union { /* software */ |
| 368 | atomic64_t count; |
| 369 | struct hrtimer hrtimer; |
| 370 | }; |
| 371 | }; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 372 | atomic64_t prev_count; |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 373 | u64 sample_period; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 374 | atomic64_t period_left; |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 375 | u64 interrupts; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 376 | #endif |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 377 | }; |
| 378 | |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 379 | struct perf_counter; |
| 380 | |
| 381 | /** |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 382 | * struct pmu - generic performance monitoring unit |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 383 | */ |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 384 | struct pmu { |
Ingo Molnar | 95cdd2e | 2008-12-21 13:50:42 +0100 | [diff] [blame] | 385 | int (*enable) (struct perf_counter *counter); |
Ingo Molnar | 7671581 | 2008-12-17 14:20:28 +0100 | [diff] [blame] | 386 | void (*disable) (struct perf_counter *counter); |
| 387 | void (*read) (struct perf_counter *counter); |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 388 | void (*unthrottle) (struct perf_counter *counter); |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 389 | }; |
| 390 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 391 | /** |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 392 | * enum perf_counter_active_state - the states of a counter |
| 393 | */ |
| 394 | enum perf_counter_active_state { |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 395 | PERF_COUNTER_STATE_ERROR = -2, |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 396 | PERF_COUNTER_STATE_OFF = -1, |
| 397 | PERF_COUNTER_STATE_INACTIVE = 0, |
| 398 | PERF_COUNTER_STATE_ACTIVE = 1, |
| 399 | }; |
| 400 | |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 401 | struct file; |
| 402 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 403 | struct perf_mmap_data { |
| 404 | struct rcu_head rcu_head; |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 405 | int nr_pages; /* nr of data pages */ |
Peter Zijlstra | c5078f7 | 2009-05-05 17:50:24 +0200 | [diff] [blame] | 406 | int nr_locked; /* nr pages mlocked */ |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 407 | |
Peter Zijlstra | c33a0bc | 2009-05-01 12:23:16 +0200 | [diff] [blame] | 408 | atomic_t poll; /* POLL_ for wakeups */ |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 409 | atomic_t events; /* event limit */ |
| 410 | |
Peter Zijlstra | 8e3747c | 2009-06-02 16:16:02 +0200 | [diff] [blame] | 411 | atomic_long_t head; /* write position */ |
| 412 | atomic_long_t done_head; /* completed head */ |
| 413 | |
Peter Zijlstra | c33a0bc | 2009-05-01 12:23:16 +0200 | [diff] [blame] | 414 | atomic_t lock; /* concurrent writes */ |
| 415 | |
Peter Zijlstra | c66de4a5 | 2009-05-05 17:50:22 +0200 | [diff] [blame] | 416 | atomic_t wakeup; /* needs a wakeup */ |
| 417 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 418 | struct perf_counter_mmap_page *user_page; |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 419 | void *data_pages[0]; |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 420 | }; |
| 421 | |
Peter Zijlstra | 671dec5 | 2009-04-06 11:45:02 +0200 | [diff] [blame] | 422 | struct perf_pending_entry { |
| 423 | struct perf_pending_entry *next; |
| 424 | void (*func)(struct perf_pending_entry *); |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 425 | }; |
| 426 | |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 427 | /** |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 428 | * struct perf_counter - performance counter kernel representation: |
| 429 | */ |
| 430 | struct perf_counter { |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 431 | #ifdef CONFIG_PERF_COUNTERS |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 432 | struct list_head list_entry; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 433 | struct list_head event_entry; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 434 | struct list_head sibling_list; |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 435 | int nr_siblings; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 436 | struct perf_counter *group_leader; |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 437 | const struct pmu *pmu; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 438 | |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 439 | enum perf_counter_active_state state; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 440 | atomic64_t count; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 441 | |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 442 | /* |
| 443 | * These are the total time in nanoseconds that the counter |
| 444 | * has been enabled (i.e. eligible to run, and the task has |
| 445 | * been scheduled in, if this is a per-task counter) |
| 446 | * and running (scheduled onto the CPU), respectively. |
| 447 | * |
| 448 | * They are computed from tstamp_enabled, tstamp_running and |
| 449 | * tstamp_stopped when the counter is in INACTIVE or ACTIVE state. |
| 450 | */ |
| 451 | u64 total_time_enabled; |
| 452 | u64 total_time_running; |
| 453 | |
| 454 | /* |
| 455 | * These are timestamps used for computing total_time_enabled |
| 456 | * and total_time_running when the counter is in INACTIVE or |
| 457 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
| 458 | * in time. |
| 459 | * tstamp_enabled: the notional time when the counter was enabled |
| 460 | * tstamp_running: the notional time when the counter was scheduled on |
| 461 | * tstamp_stopped: in INACTIVE state, the notional time when the |
| 462 | * counter was scheduled off. |
| 463 | */ |
| 464 | u64 tstamp_enabled; |
| 465 | u64 tstamp_running; |
| 466 | u64 tstamp_stopped; |
| 467 | |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 468 | struct perf_counter_attr attr; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 469 | struct hw_perf_counter hw; |
| 470 | |
| 471 | struct perf_counter_context *ctx; |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 472 | struct file *filp; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 473 | |
| 474 | /* |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 475 | * These accumulate total time (in nanoseconds) that children |
| 476 | * counters have been enabled and running, respectively. |
| 477 | */ |
| 478 | atomic64_t child_total_time_enabled; |
| 479 | atomic64_t child_total_time_running; |
| 480 | |
| 481 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 482 | * Protect attach/detach and child_list: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 483 | */ |
Peter Zijlstra | fccc714 | 2009-05-23 18:28:56 +0200 | [diff] [blame] | 484 | struct mutex child_mutex; |
| 485 | struct list_head child_list; |
| 486 | struct perf_counter *parent; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 487 | |
| 488 | int oncpu; |
| 489 | int cpu; |
| 490 | |
Peter Zijlstra | 082ff5a | 2009-05-23 18:29:00 +0200 | [diff] [blame] | 491 | struct list_head owner_entry; |
| 492 | struct task_struct *owner; |
| 493 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 494 | /* mmap bits */ |
| 495 | struct mutex mmap_mutex; |
| 496 | atomic_t mmap_count; |
| 497 | struct perf_mmap_data *data; |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 498 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 499 | /* poll related */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 500 | wait_queue_head_t waitq; |
Peter Zijlstra | 3c446b3d | 2009-04-06 11:45:01 +0200 | [diff] [blame] | 501 | struct fasync_struct *fasync; |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 502 | |
| 503 | /* delayed work for NMIs and such */ |
| 504 | int pending_wakeup; |
Peter Zijlstra | 4c9e254 | 2009-04-06 11:45:09 +0200 | [diff] [blame] | 505 | int pending_kill; |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 506 | int pending_disable; |
Peter Zijlstra | 671dec5 | 2009-04-06 11:45:02 +0200 | [diff] [blame] | 507 | struct perf_pending_entry pending; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 508 | |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 509 | atomic_t event_limit; |
| 510 | |
Peter Zijlstra | e077df4 | 2009-03-19 20:26:17 +0100 | [diff] [blame] | 511 | void (*destroy)(struct perf_counter *); |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 512 | struct rcu_head rcu_head; |
Peter Zijlstra | 709e50c | 2009-06-02 14:13:15 +0200 | [diff] [blame] | 513 | |
| 514 | struct pid_namespace *ns; |
Peter Zijlstra | 8e5799b | 2009-06-02 15:08:15 +0200 | [diff] [blame] | 515 | u64 id; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 516 | #endif |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 517 | }; |
| 518 | |
| 519 | /** |
| 520 | * struct perf_counter_context - counter context structure |
| 521 | * |
| 522 | * Used as a container for task counters and CPU counters as well: |
| 523 | */ |
| 524 | struct perf_counter_context { |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 525 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 526 | * Protect the states of the counters in the list, |
| 527 | * nr_active, and the list: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 528 | */ |
| 529 | spinlock_t lock; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 530 | /* |
| 531 | * Protect the list of counters. Locking either mutex or lock |
| 532 | * is sufficient to ensure the list doesn't change; to change |
| 533 | * the list you need to lock both the mutex and the spinlock. |
| 534 | */ |
| 535 | struct mutex mutex; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 536 | |
| 537 | struct list_head counter_list; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 538 | struct list_head event_list; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 539 | int nr_counters; |
| 540 | int nr_active; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 541 | int is_active; |
Paul Mackerras | a63eaf3 | 2009-05-22 14:17:31 +1000 | [diff] [blame] | 542 | atomic_t refcount; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 543 | struct task_struct *task; |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 544 | |
| 545 | /* |
Peter Zijlstra | 4af4998 | 2009-04-06 11:45:10 +0200 | [diff] [blame] | 546 | * Context clock, runs when context enabled. |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 547 | */ |
Peter Zijlstra | 4af4998 | 2009-04-06 11:45:10 +0200 | [diff] [blame] | 548 | u64 time; |
| 549 | u64 timestamp; |
Paul Mackerras | 564c2b2 | 2009-05-22 14:27:22 +1000 | [diff] [blame] | 550 | |
| 551 | /* |
| 552 | * These fields let us detect when two contexts have both |
| 553 | * been cloned (inherited) from a common ancestor. |
| 554 | */ |
| 555 | struct perf_counter_context *parent_ctx; |
Paul Mackerras | c93f766 | 2009-05-28 22:18:17 +1000 | [diff] [blame] | 556 | u64 parent_gen; |
| 557 | u64 generation; |
Paul Mackerras | 25346b93 | 2009-06-01 17:48:12 +1000 | [diff] [blame] | 558 | int pin_count; |
Paul Mackerras | c93f766 | 2009-05-28 22:18:17 +1000 | [diff] [blame] | 559 | struct rcu_head rcu_head; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 560 | }; |
| 561 | |
| 562 | /** |
| 563 | * struct perf_counter_cpu_context - per cpu counter context structure |
| 564 | */ |
| 565 | struct perf_cpu_context { |
| 566 | struct perf_counter_context ctx; |
| 567 | struct perf_counter_context *task_ctx; |
| 568 | int active_oncpu; |
| 569 | int max_pertask; |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 570 | int exclusive; |
Peter Zijlstra | 96f6d44 | 2009-03-23 18:22:07 +0100 | [diff] [blame] | 571 | |
| 572 | /* |
| 573 | * Recursion avoidance: |
| 574 | * |
| 575 | * task, softirq, irq, nmi context |
| 576 | */ |
Ingo Molnar | 22a4f65 | 2009-06-01 10:13:37 +0200 | [diff] [blame] | 577 | int recursion[4]; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 578 | }; |
| 579 | |
Robert Richter | 829b42d | 2009-04-29 12:46:59 +0200 | [diff] [blame] | 580 | #ifdef CONFIG_PERF_COUNTERS |
| 581 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 582 | /* |
| 583 | * Set by architecture code: |
| 584 | */ |
| 585 | extern int perf_max_counters; |
| 586 | |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 587 | extern const struct pmu *hw_perf_counter_init(struct perf_counter *counter); |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 588 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 589 | extern void perf_counter_task_sched_in(struct task_struct *task, int cpu); |
Paul Mackerras | 564c2b2 | 2009-05-22 14:27:22 +1000 | [diff] [blame] | 590 | extern void perf_counter_task_sched_out(struct task_struct *task, |
| 591 | struct task_struct *next, int cpu); |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 592 | extern void perf_counter_task_tick(struct task_struct *task, int cpu); |
Peter Zijlstra | 6ab423e | 2009-05-25 14:45:27 +0200 | [diff] [blame] | 593 | extern int perf_counter_init_task(struct task_struct *child); |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 594 | extern void perf_counter_exit_task(struct task_struct *child); |
Peter Zijlstra | bbbee90 | 2009-05-29 14:25:58 +0200 | [diff] [blame] | 595 | extern void perf_counter_free_task(struct task_struct *task); |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 596 | extern void perf_counter_do_pending(void); |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 597 | extern void perf_counter_print_debug(void); |
Peter Zijlstra | 9e35ad3 | 2009-05-13 16:21:38 +0200 | [diff] [blame] | 598 | extern void __perf_disable(void); |
| 599 | extern bool __perf_enable(void); |
| 600 | extern void perf_disable(void); |
| 601 | extern void perf_enable(void); |
Ingo Molnar | 1d1c7dd | 2008-12-11 14:59:31 +0100 | [diff] [blame] | 602 | extern int perf_counter_task_disable(void); |
| 603 | extern int perf_counter_task_enable(void); |
Paul Mackerras | 3cbed42 | 2009-01-09 16:43:42 +1100 | [diff] [blame] | 604 | extern int hw_perf_group_sched_in(struct perf_counter *group_leader, |
| 605 | struct perf_cpu_context *cpuctx, |
| 606 | struct perf_counter_context *ctx, int cpu); |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 607 | extern void perf_counter_update_userpage(struct perf_counter *counter); |
Ingo Molnar | 5c92d12 | 2008-12-11 13:21:10 +0100 | [diff] [blame] | 608 | |
Peter Zijlstra | f6c7d5f | 2009-04-06 11:45:04 +0200 | [diff] [blame] | 609 | extern int perf_counter_overflow(struct perf_counter *counter, |
Peter Zijlstra | 78f13e9 | 2009-04-08 15:01:33 +0200 | [diff] [blame] | 610 | int nmi, struct pt_regs *regs, u64 addr); |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 611 | /* |
| 612 | * Return 1 for a software counter, 0 for a hardware counter |
| 613 | */ |
| 614 | static inline int is_software_counter(struct perf_counter *counter) |
| 615 | { |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 616 | return !perf_event_raw(&counter->attr) && |
| 617 | perf_event_type(&counter->attr) != PERF_TYPE_HARDWARE; |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 618 | } |
| 619 | |
Peter Zijlstra | 78f13e9 | 2009-04-08 15:01:33 +0200 | [diff] [blame] | 620 | extern void perf_swcounter_event(u32, u64, int, struct pt_regs *, u64); |
Peter Zijlstra | 15dbf27 | 2009-03-13 12:21:32 +0100 | [diff] [blame] | 621 | |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 622 | extern void perf_counter_mmap(unsigned long addr, unsigned long len, |
| 623 | unsigned long pgoff, struct file *file); |
| 624 | |
| 625 | extern void perf_counter_munmap(unsigned long addr, unsigned long len, |
| 626 | unsigned long pgoff, struct file *file); |
| 627 | |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 628 | extern void perf_counter_comm(struct task_struct *tsk); |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame^] | 629 | extern void perf_counter_fork(struct task_struct *tsk); |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 630 | |
Paul Mackerras | 3f731ca | 2009-06-01 17:52:30 +1000 | [diff] [blame] | 631 | extern void perf_counter_task_migration(struct task_struct *task, int cpu); |
| 632 | |
Peter Zijlstra | 9c03d88 | 2009-04-06 11:45:00 +0200 | [diff] [blame] | 633 | #define MAX_STACK_DEPTH 255 |
Peter Zijlstra | 394ee07 | 2009-03-30 19:07:14 +0200 | [diff] [blame] | 634 | |
| 635 | struct perf_callchain_entry { |
Peter Zijlstra | 9c03d88 | 2009-04-06 11:45:00 +0200 | [diff] [blame] | 636 | u16 nr, hv, kernel, user; |
Peter Zijlstra | 394ee07 | 2009-03-30 19:07:14 +0200 | [diff] [blame] | 637 | u64 ip[MAX_STACK_DEPTH]; |
| 638 | }; |
| 639 | |
| 640 | extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); |
| 641 | |
Peter Zijlstra | 1ccd154 | 2009-04-09 10:53:45 +0200 | [diff] [blame] | 642 | extern int sysctl_perf_counter_priv; |
Peter Zijlstra | c5078f7 | 2009-05-05 17:50:24 +0200 | [diff] [blame] | 643 | extern int sysctl_perf_counter_mlock; |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 644 | extern int sysctl_perf_counter_limit; |
Peter Zijlstra | 1ccd154 | 2009-04-09 10:53:45 +0200 | [diff] [blame] | 645 | |
Ingo Molnar | 0d905bc | 2009-05-04 19:13:30 +0200 | [diff] [blame] | 646 | extern void perf_counter_init(void); |
| 647 | |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 648 | #ifndef perf_misc_flags |
| 649 | #define perf_misc_flags(regs) (user_mode(regs) ? PERF_EVENT_MISC_USER : \ |
| 650 | PERF_EVENT_MISC_KERNEL) |
| 651 | #define perf_instruction_pointer(regs) instruction_pointer(regs) |
| 652 | #endif |
| 653 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 654 | #else |
| 655 | static inline void |
| 656 | perf_counter_task_sched_in(struct task_struct *task, int cpu) { } |
| 657 | static inline void |
Ingo Molnar | 910431c | 2009-05-22 12:32:15 +0200 | [diff] [blame] | 658 | perf_counter_task_sched_out(struct task_struct *task, |
| 659 | struct task_struct *next, int cpu) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 660 | static inline void |
| 661 | perf_counter_task_tick(struct task_struct *task, int cpu) { } |
Ingo Molnar | d3e78ee | 2009-05-28 11:41:50 +0200 | [diff] [blame] | 662 | static inline int perf_counter_init_task(struct task_struct *child) { return 0; } |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 663 | static inline void perf_counter_exit_task(struct task_struct *child) { } |
Peter Zijlstra | bbbee90 | 2009-05-29 14:25:58 +0200 | [diff] [blame] | 664 | static inline void perf_counter_free_task(struct task_struct *task) { } |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 665 | static inline void perf_counter_do_pending(void) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 666 | static inline void perf_counter_print_debug(void) { } |
Peter Zijlstra | 9e35ad3 | 2009-05-13 16:21:38 +0200 | [diff] [blame] | 667 | static inline void perf_disable(void) { } |
| 668 | static inline void perf_enable(void) { } |
Ingo Molnar | 1d1c7dd | 2008-12-11 14:59:31 +0100 | [diff] [blame] | 669 | static inline int perf_counter_task_disable(void) { return -EINVAL; } |
| 670 | static inline int perf_counter_task_enable(void) { return -EINVAL; } |
Peter Zijlstra | 15dbf27 | 2009-03-13 12:21:32 +0100 | [diff] [blame] | 671 | |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 672 | static inline void |
Peter Zijlstra | 78f13e9 | 2009-04-08 15:01:33 +0200 | [diff] [blame] | 673 | perf_swcounter_event(u32 event, u64 nr, int nmi, |
| 674 | struct pt_regs *regs, u64 addr) { } |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 675 | |
| 676 | static inline void |
| 677 | perf_counter_mmap(unsigned long addr, unsigned long len, |
| 678 | unsigned long pgoff, struct file *file) { } |
| 679 | |
| 680 | static inline void |
| 681 | perf_counter_munmap(unsigned long addr, unsigned long len, |
Ingo Molnar | 0d905bc | 2009-05-04 19:13:30 +0200 | [diff] [blame] | 682 | unsigned long pgoff, struct file *file) { } |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 683 | |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 684 | static inline void perf_counter_comm(struct task_struct *tsk) { } |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame^] | 685 | static inline void perf_counter_fork(struct task_struct *tsk) { } |
Ingo Molnar | 0d905bc | 2009-05-04 19:13:30 +0200 | [diff] [blame] | 686 | static inline void perf_counter_init(void) { } |
Paul Mackerras | 3f731ca | 2009-06-01 17:52:30 +1000 | [diff] [blame] | 687 | static inline void perf_counter_task_migration(struct task_struct *task, |
| 688 | int cpu) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 689 | #endif |
| 690 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 691 | #endif /* __KERNEL__ */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 692 | #endif /* _LINUX_PERF_COUNTER_H */ |