Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Performance counters: |
| 3 | * |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 4 | * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de> |
| 5 | * Copyright (C) 2008-2009, Red Hat, Inc., Ingo Molnar |
| 6 | * Copyright (C) 2008-2009, Red Hat, Inc., Peter Zijlstra |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 7 | * |
| 8 | * Data type definitions, declarations, prototypes. |
| 9 | * |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 10 | * Started by: Thomas Gleixner and Ingo Molnar |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 11 | * |
| 12 | * For licencing details see kernel-base/COPYING |
| 13 | */ |
| 14 | #ifndef _LINUX_PERF_COUNTER_H |
| 15 | #define _LINUX_PERF_COUNTER_H |
| 16 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 17 | #include <linux/types.h> |
| 18 | #include <linux/ioctl.h> |
Paul Mackerras | 9aaa131 | 2009-03-21 15:31:47 +1100 | [diff] [blame] | 19 | #include <asm/byteorder.h> |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 20 | |
| 21 | /* |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 22 | * User-space ABI bits: |
| 23 | */ |
| 24 | |
| 25 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 26 | * attr.type |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 27 | */ |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame] | 28 | enum perf_type_id { |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 29 | PERF_TYPE_HARDWARE = 0, |
| 30 | PERF_TYPE_SOFTWARE = 1, |
| 31 | PERF_TYPE_TRACEPOINT = 2, |
| 32 | PERF_TYPE_HW_CACHE = 3, |
| 33 | PERF_TYPE_RAW = 4, |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 34 | |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 35 | PERF_TYPE_MAX, /* non-ABI */ |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 36 | }; |
| 37 | |
| 38 | /* |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 39 | * Generalized performance counter event types, used by the |
| 40 | * attr.event_id parameter of the sys_perf_counter_open() |
| 41 | * syscall: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 42 | */ |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame] | 43 | enum perf_hw_id { |
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 | f4dbfa8 | 2009-06-11 14:06:28 +0200 | [diff] [blame] | 47 | PERF_COUNT_HW_CPU_CYCLES = 0, |
| 48 | PERF_COUNT_HW_INSTRUCTIONS = 1, |
| 49 | PERF_COUNT_HW_CACHE_REFERENCES = 2, |
| 50 | PERF_COUNT_HW_CACHE_MISSES = 3, |
| 51 | PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4, |
| 52 | PERF_COUNT_HW_BRANCH_MISSES = 5, |
| 53 | PERF_COUNT_HW_BUS_CYCLES = 6, |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 54 | |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 55 | PERF_COUNT_HW_MAX, /* non-ABI */ |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 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 | /* |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 59 | * Generalized hardware cache counters: |
| 60 | * |
Peter Zijlstra | 8be6e8f | 2009-06-11 14:19:11 +0200 | [diff] [blame] | 61 | * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 62 | * { read, write, prefetch } x |
| 63 | * { accesses, misses } |
| 64 | */ |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame] | 65 | enum perf_hw_cache_id { |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 66 | PERF_COUNT_HW_CACHE_L1D = 0, |
| 67 | PERF_COUNT_HW_CACHE_L1I = 1, |
| 68 | PERF_COUNT_HW_CACHE_LL = 2, |
| 69 | PERF_COUNT_HW_CACHE_DTLB = 3, |
| 70 | PERF_COUNT_HW_CACHE_ITLB = 4, |
| 71 | PERF_COUNT_HW_CACHE_BPU = 5, |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 72 | |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 73 | PERF_COUNT_HW_CACHE_MAX, /* non-ABI */ |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 74 | }; |
| 75 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame] | 76 | enum perf_hw_cache_op_id { |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 77 | PERF_COUNT_HW_CACHE_OP_READ = 0, |
| 78 | PERF_COUNT_HW_CACHE_OP_WRITE = 1, |
| 79 | PERF_COUNT_HW_CACHE_OP_PREFETCH = 2, |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 80 | |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 81 | PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */ |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 82 | }; |
| 83 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame] | 84 | enum perf_hw_cache_op_result_id { |
| 85 | PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0, |
| 86 | PERF_COUNT_HW_CACHE_RESULT_MISS = 1, |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 87 | |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 88 | PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */ |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 89 | }; |
| 90 | |
| 91 | /* |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 92 | * Special "software" counters provided by the kernel, even if the hardware |
| 93 | * does not support performance counters. These counters measure various |
| 94 | * physical and sw events of the kernel (and allow the profiling of them as |
| 95 | * well): |
| 96 | */ |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame] | 97 | enum perf_sw_ids { |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 98 | PERF_COUNT_SW_CPU_CLOCK = 0, |
| 99 | PERF_COUNT_SW_TASK_CLOCK = 1, |
| 100 | PERF_COUNT_SW_PAGE_FAULTS = 2, |
| 101 | PERF_COUNT_SW_CONTEXT_SWITCHES = 3, |
| 102 | PERF_COUNT_SW_CPU_MIGRATIONS = 4, |
| 103 | PERF_COUNT_SW_PAGE_FAULTS_MIN = 5, |
| 104 | PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6, |
Ingo Molnar | 6c594c2 | 2008-12-14 12:34:15 +0100 | [diff] [blame] | 105 | |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 106 | PERF_COUNT_SW_MAX, /* non-ABI */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 107 | }; |
| 108 | |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 109 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 110 | * Bits that can be set in attr.sample_type to request information |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 111 | * in the overflow packets. |
| 112 | */ |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 113 | enum perf_counter_sample_format { |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 114 | PERF_SAMPLE_IP = 1U << 0, |
| 115 | PERF_SAMPLE_TID = 1U << 1, |
| 116 | PERF_SAMPLE_TIME = 1U << 2, |
| 117 | PERF_SAMPLE_ADDR = 1U << 3, |
| 118 | PERF_SAMPLE_GROUP = 1U << 4, |
| 119 | PERF_SAMPLE_CALLCHAIN = 1U << 5, |
| 120 | PERF_SAMPLE_ID = 1U << 6, |
| 121 | PERF_SAMPLE_CPU = 1U << 7, |
| 122 | PERF_SAMPLE_PERIOD = 1U << 8, |
Peter Zijlstra | 974802e | 2009-06-12 12:46:55 +0200 | [diff] [blame] | 123 | |
| 124 | PERF_SAMPLE_MAX = 1U << 9, /* non-ABI */ |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 125 | }; |
| 126 | |
| 127 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 128 | * Bits that can be set in attr.read_format to request that |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 129 | * reads on the counter should return the indicated quantities, |
| 130 | * in increasing order of bit value, after the counter value. |
| 131 | */ |
| 132 | enum perf_counter_read_format { |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 133 | PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0, |
| 134 | PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1, |
| 135 | PERF_FORMAT_ID = 1U << 2, |
Peter Zijlstra | 974802e | 2009-06-12 12:46:55 +0200 | [diff] [blame] | 136 | |
| 137 | PERF_FORMAT_MAX = 1U << 3, /* non-ABI */ |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 138 | }; |
| 139 | |
Peter Zijlstra | 974802e | 2009-06-12 12:46:55 +0200 | [diff] [blame] | 140 | #define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */ |
| 141 | |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 142 | /* |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 143 | * Hardware event to monitor via a performance monitoring counter: |
| 144 | */ |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 145 | struct perf_counter_attr { |
Peter Zijlstra | 974802e | 2009-06-12 12:46:55 +0200 | [diff] [blame] | 146 | |
Peter Zijlstra | f4a2deb | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 147 | /* |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 148 | * Major type: hardware/software/tracepoint/etc. |
| 149 | */ |
| 150 | __u32 type; |
Peter Zijlstra | 974802e | 2009-06-12 12:46:55 +0200 | [diff] [blame] | 151 | |
| 152 | /* |
| 153 | * Size of the attr structure, for fwd/bwd compat. |
| 154 | */ |
| 155 | __u32 size; |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 156 | |
| 157 | /* |
| 158 | * Type specific configuration information. |
Peter Zijlstra | f4a2deb | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 159 | */ |
| 160 | __u64 config; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 161 | |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 162 | union { |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 163 | __u64 sample_period; |
| 164 | __u64 sample_freq; |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 165 | }; |
| 166 | |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 167 | __u64 sample_type; |
| 168 | __u64 read_format; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 169 | |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 170 | __u64 disabled : 1, /* off by default */ |
Paul Mackerras | 0475f9e | 2009-02-11 14:35:35 +1100 | [diff] [blame] | 171 | inherit : 1, /* children inherit it */ |
| 172 | pinned : 1, /* must always be on PMU */ |
| 173 | exclusive : 1, /* only group on PMU */ |
| 174 | exclude_user : 1, /* don't count user */ |
| 175 | exclude_kernel : 1, /* ditto kernel */ |
| 176 | exclude_hv : 1, /* ditto hypervisor */ |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 177 | exclude_idle : 1, /* don't count when idle */ |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 178 | mmap : 1, /* include mmap data */ |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 179 | comm : 1, /* include comm data */ |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 180 | freq : 1, /* use freq, not period */ |
Peter Zijlstra | bfbd338 | 2009-06-24 21:11:59 +0200 | [diff] [blame] | 181 | inherit_stat : 1, /* per task counts */ |
Paul Mackerras | 57e7986 | 2009-06-30 16:07:19 +1000 | [diff] [blame] | 182 | enable_on_exec : 1, /* next exec enables */ |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 183 | |
Paul Mackerras | 57e7986 | 2009-06-30 16:07:19 +1000 | [diff] [blame] | 184 | __reserved_1 : 51; |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 185 | |
Peter Zijlstra | c457810 | 2009-04-02 11:12:01 +0200 | [diff] [blame] | 186 | __u32 wakeup_events; /* wakeup every n events */ |
Peter Zijlstra | 974802e | 2009-06-12 12:46:55 +0200 | [diff] [blame] | 187 | __u32 __reserved_2; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 188 | |
Peter Zijlstra | 974802e | 2009-06-12 12:46:55 +0200 | [diff] [blame] | 189 | __u64 __reserved_3; |
Thomas Gleixner | eab656a | 2008-12-08 19:26:59 +0100 | [diff] [blame] | 190 | }; |
| 191 | |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 192 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 193 | * Ioctls that can be done on a perf counter fd: |
| 194 | */ |
Peter Zijlstra | 08247e3 | 2009-06-02 16:46:57 +0200 | [diff] [blame] | 195 | #define PERF_COUNTER_IOC_ENABLE _IO ('$', 0) |
| 196 | #define PERF_COUNTER_IOC_DISABLE _IO ('$', 1) |
| 197 | #define PERF_COUNTER_IOC_REFRESH _IO ('$', 2) |
| 198 | #define PERF_COUNTER_IOC_RESET _IO ('$', 3) |
| 199 | #define PERF_COUNTER_IOC_PERIOD _IOW('$', 4, u64) |
Peter Zijlstra | 3df5eda | 2009-05-08 18:52:22 +0200 | [diff] [blame] | 200 | |
| 201 | enum perf_counter_ioc_flags { |
| 202 | PERF_IOC_FLAG_GROUP = 1U << 0, |
| 203 | }; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 204 | |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 205 | /* |
| 206 | * Structure of the page that can be mapped via mmap |
| 207 | */ |
| 208 | struct perf_counter_mmap_page { |
| 209 | __u32 version; /* version number of this structure */ |
| 210 | __u32 compat_version; /* lowest version this is compat with */ |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 211 | |
| 212 | /* |
| 213 | * Bits needed to read the hw counters in user-space. |
| 214 | * |
Peter Zijlstra | 92f22a3 | 2009-04-02 11:12:04 +0200 | [diff] [blame] | 215 | * u32 seq; |
| 216 | * s64 count; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 217 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 218 | * do { |
| 219 | * seq = pc->lock; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 220 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 221 | * barrier() |
| 222 | * if (pc->index) { |
| 223 | * count = pmc_read(pc->index - 1); |
| 224 | * count += pc->offset; |
| 225 | * } else |
| 226 | * goto regular_read; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 227 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 228 | * barrier(); |
| 229 | * } while (pc->lock != seq); |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 230 | * |
Peter Zijlstra | 92f22a3 | 2009-04-02 11:12:04 +0200 | [diff] [blame] | 231 | * NOTE: for obvious reason this only works on self-monitoring |
| 232 | * processes. |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 233 | */ |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 234 | __u32 lock; /* seqlock for synchronization */ |
| 235 | __u32 index; /* hardware counter identifier */ |
| 236 | __s64 offset; /* add to hardware counter value */ |
Peter Zijlstra | 7f8b4e4 | 2009-06-22 14:34:35 +0200 | [diff] [blame] | 237 | __u64 time_enabled; /* time counter active */ |
| 238 | __u64 time_running; /* time counter on cpu */ |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 239 | |
Peter Zijlstra | 41f9533 | 2009-06-23 17:55:18 +0200 | [diff] [blame] | 240 | /* |
| 241 | * Hole for extension of the self monitor capabilities |
| 242 | */ |
| 243 | |
Peter Zijlstra | 7f8b4e4 | 2009-06-22 14:34:35 +0200 | [diff] [blame] | 244 | __u64 __reserved[123]; /* align to 1k */ |
Peter Zijlstra | 41f9533 | 2009-06-23 17:55:18 +0200 | [diff] [blame] | 245 | |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 246 | /* |
| 247 | * Control data for the mmap() data buffer. |
| 248 | * |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 249 | * User-space reading the @data_head value should issue an rmb(), on |
| 250 | * SMP capable platforms, after reading this value -- see |
| 251 | * perf_counter_wakeup(). |
| 252 | * |
| 253 | * When the mapping is PROT_WRITE the @data_tail value should be |
| 254 | * written by userspace to reflect the last read data. In this case |
| 255 | * the kernel will not over-write unread data. |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 256 | */ |
Peter Zijlstra | 8e3747c | 2009-06-02 16:16:02 +0200 | [diff] [blame] | 257 | __u64 data_head; /* head in the data section */ |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 258 | __u64 data_tail; /* user-space written tail */ |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 259 | }; |
| 260 | |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 261 | #define PERF_EVENT_MISC_CPUMODE_MASK (3 << 0) |
| 262 | #define PERF_EVENT_MISC_CPUMODE_UNKNOWN (0 << 0) |
| 263 | #define PERF_EVENT_MISC_KERNEL (1 << 0) |
| 264 | #define PERF_EVENT_MISC_USER (2 << 0) |
| 265 | #define PERF_EVENT_MISC_HYPERVISOR (3 << 0) |
Peter Zijlstra | 6fab019 | 2009-04-08 15:01:26 +0200 | [diff] [blame] | 266 | |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 267 | struct perf_event_header { |
| 268 | __u32 type; |
Peter Zijlstra | 6fab019 | 2009-04-08 15:01:26 +0200 | [diff] [blame] | 269 | __u16 misc; |
| 270 | __u16 size; |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 271 | }; |
| 272 | |
| 273 | enum perf_event_type { |
Peter Zijlstra | 5ed0041 | 2009-03-30 19:07:12 +0200 | [diff] [blame] | 274 | |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 275 | /* |
| 276 | * The MMAP events record the PROT_EXEC mappings so that we can |
| 277 | * correlate userspace IPs to code. They have the following structure: |
| 278 | * |
| 279 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 280 | * struct perf_event_header header; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 281 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 282 | * u32 pid, tid; |
| 283 | * u64 addr; |
| 284 | * u64 len; |
| 285 | * u64 pgoff; |
| 286 | * char filename[]; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 287 | * }; |
| 288 | */ |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 289 | PERF_EVENT_MMAP = 1, |
Peter Zijlstra | ea5d20c | 2009-03-25 12:30:25 +0100 | [diff] [blame] | 290 | |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 291 | /* |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 292 | * struct { |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 293 | * struct perf_event_header header; |
| 294 | * u64 id; |
| 295 | * u64 lost; |
| 296 | * }; |
| 297 | */ |
| 298 | PERF_EVENT_LOST = 2, |
| 299 | |
| 300 | /* |
| 301 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 302 | * struct perf_event_header header; |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 303 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 304 | * u32 pid, tid; |
| 305 | * char comm[]; |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 306 | * }; |
| 307 | */ |
| 308 | PERF_EVENT_COMM = 3, |
| 309 | |
| 310 | /* |
Peter Zijlstra | 26b119b | 2009-05-20 12:21:20 +0200 | [diff] [blame] | 311 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 312 | * struct perf_event_header header; |
| 313 | * u64 time; |
Peter Zijlstra | 689802b | 2009-06-05 15:05:43 +0200 | [diff] [blame] | 314 | * u64 id; |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 315 | * u64 sample_period; |
Peter Zijlstra | 26b119b | 2009-05-20 12:21:20 +0200 | [diff] [blame] | 316 | * }; |
| 317 | */ |
| 318 | PERF_EVENT_PERIOD = 4, |
| 319 | |
| 320 | /* |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 321 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 322 | * struct perf_event_header header; |
| 323 | * u64 time; |
Peter Zijlstra | cca3f45 | 2009-06-11 14:57:55 +0200 | [diff] [blame] | 324 | * u64 id; |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 325 | * }; |
| 326 | */ |
| 327 | PERF_EVENT_THROTTLE = 5, |
| 328 | PERF_EVENT_UNTHROTTLE = 6, |
| 329 | |
| 330 | /* |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame] | 331 | * struct { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 332 | * struct perf_event_header header; |
| 333 | * u32 pid, ppid; |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame] | 334 | * }; |
| 335 | */ |
| 336 | PERF_EVENT_FORK = 7, |
| 337 | |
| 338 | /* |
Peter Zijlstra | 38b200d | 2009-06-23 20:13:11 +0200 | [diff] [blame] | 339 | * struct { |
| 340 | * struct perf_event_header header; |
| 341 | * u32 pid, tid; |
| 342 | * u64 value; |
| 343 | * { u64 time_enabled; } && PERF_FORMAT_ENABLED |
| 344 | * { u64 time_running; } && PERF_FORMAT_RUNNING |
| 345 | * { u64 parent_id; } && PERF_FORMAT_ID |
| 346 | * }; |
| 347 | */ |
| 348 | PERF_EVENT_READ = 8, |
| 349 | |
| 350 | /* |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 351 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 352 | * struct perf_event_header header; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 353 | * |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 354 | * { u64 ip; } && PERF_SAMPLE_IP |
| 355 | * { u32 pid, tid; } && PERF_SAMPLE_TID |
| 356 | * { u64 time; } && PERF_SAMPLE_TIME |
| 357 | * { u64 addr; } && PERF_SAMPLE_ADDR |
Peter Zijlstra | e6e18ec | 2009-06-25 11:27:12 +0200 | [diff] [blame] | 358 | * { u64 id; } && PERF_SAMPLE_ID |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 359 | * { u32 cpu, res; } && PERF_SAMPLE_CPU |
Peter Zijlstra | e6e18ec | 2009-06-25 11:27:12 +0200 | [diff] [blame] | 360 | * { u64 period; } && PERF_SAMPLE_PERIOD |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 361 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 362 | * { u64 nr; |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 363 | * { u64 id, val; } cnt[nr]; } && PERF_SAMPLE_GROUP |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 364 | * |
Peter Zijlstra | f9188e0 | 2009-06-18 22:20:52 +0200 | [diff] [blame] | 365 | * { u64 nr, |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 366 | * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 367 | * }; |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 368 | */ |
Peter Zijlstra | e6e18ec | 2009-06-25 11:27:12 +0200 | [diff] [blame] | 369 | PERF_EVENT_SAMPLE = 9, |
| 370 | |
| 371 | PERF_EVENT_MAX, /* non-ABI */ |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 372 | }; |
| 373 | |
Peter Zijlstra | f9188e0 | 2009-06-18 22:20:52 +0200 | [diff] [blame] | 374 | enum perf_callchain_context { |
| 375 | PERF_CONTEXT_HV = (__u64)-32, |
| 376 | PERF_CONTEXT_KERNEL = (__u64)-128, |
| 377 | PERF_CONTEXT_USER = (__u64)-512, |
Ingo Molnar | 7522060 | 2009-06-18 08:00:17 +0200 | [diff] [blame] | 378 | |
Peter Zijlstra | f9188e0 | 2009-06-18 22:20:52 +0200 | [diff] [blame] | 379 | PERF_CONTEXT_GUEST = (__u64)-2048, |
| 380 | PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176, |
| 381 | PERF_CONTEXT_GUEST_USER = (__u64)-2560, |
| 382 | |
| 383 | PERF_CONTEXT_MAX = (__u64)-4095, |
Ingo Molnar | 7522060 | 2009-06-18 08:00:17 +0200 | [diff] [blame] | 384 | }; |
| 385 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 386 | #ifdef __KERNEL__ |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 387 | /* |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 388 | * Kernel-internal data types and definitions: |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 389 | */ |
| 390 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 391 | #ifdef CONFIG_PERF_COUNTERS |
| 392 | # include <asm/perf_counter.h> |
| 393 | #endif |
| 394 | |
| 395 | #include <linux/list.h> |
| 396 | #include <linux/mutex.h> |
| 397 | #include <linux/rculist.h> |
| 398 | #include <linux/rcupdate.h> |
| 399 | #include <linux/spinlock.h> |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 400 | #include <linux/hrtimer.h> |
Peter Zijlstra | 3c446b3 | 2009-04-06 11:45:01 +0200 | [diff] [blame] | 401 | #include <linux/fs.h> |
Peter Zijlstra | 709e50c | 2009-06-02 14:13:15 +0200 | [diff] [blame] | 402 | #include <linux/pid_namespace.h> |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 403 | #include <asm/atomic.h> |
| 404 | |
Peter Zijlstra | f9188e0 | 2009-06-18 22:20:52 +0200 | [diff] [blame] | 405 | #define PERF_MAX_STACK_DEPTH 255 |
| 406 | |
| 407 | struct perf_callchain_entry { |
| 408 | __u64 nr; |
| 409 | __u64 ip[PERF_MAX_STACK_DEPTH]; |
| 410 | }; |
| 411 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 412 | struct task_struct; |
| 413 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 414 | /** |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 415 | * struct hw_perf_counter - performance counter hardware details: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 416 | */ |
| 417 | struct hw_perf_counter { |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 418 | #ifdef CONFIG_PERF_COUNTERS |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 419 | union { |
| 420 | struct { /* hardware */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 421 | u64 config; |
| 422 | unsigned long config_base; |
| 423 | unsigned long counter_base; |
| 424 | int idx; |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 425 | }; |
| 426 | union { /* software */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 427 | atomic64_t count; |
| 428 | struct hrtimer hrtimer; |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 429 | }; |
| 430 | }; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 431 | atomic64_t prev_count; |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 432 | u64 sample_period; |
Peter Zijlstra | 9e350de | 2009-06-10 21:34:59 +0200 | [diff] [blame] | 433 | u64 last_period; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 434 | atomic64_t period_left; |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 435 | u64 interrupts; |
Peter Zijlstra | 6a24ed6c | 2009-06-05 18:01:29 +0200 | [diff] [blame] | 436 | |
| 437 | u64 freq_count; |
| 438 | u64 freq_interrupts; |
Peter Zijlstra | bd2b5b1 | 2009-06-10 13:40:57 +0200 | [diff] [blame] | 439 | u64 freq_stamp; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 440 | #endif |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 441 | }; |
| 442 | |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 443 | struct perf_counter; |
| 444 | |
| 445 | /** |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 446 | * struct pmu - generic performance monitoring unit |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 447 | */ |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 448 | struct pmu { |
Ingo Molnar | 95cdd2e | 2008-12-21 13:50:42 +0100 | [diff] [blame] | 449 | int (*enable) (struct perf_counter *counter); |
Ingo Molnar | 7671581 | 2008-12-17 14:20:28 +0100 | [diff] [blame] | 450 | void (*disable) (struct perf_counter *counter); |
| 451 | void (*read) (struct perf_counter *counter); |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 452 | void (*unthrottle) (struct perf_counter *counter); |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 453 | }; |
| 454 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 455 | /** |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 456 | * enum perf_counter_active_state - the states of a counter |
| 457 | */ |
| 458 | enum perf_counter_active_state { |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 459 | PERF_COUNTER_STATE_ERROR = -2, |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 460 | PERF_COUNTER_STATE_OFF = -1, |
| 461 | PERF_COUNTER_STATE_INACTIVE = 0, |
| 462 | PERF_COUNTER_STATE_ACTIVE = 1, |
| 463 | }; |
| 464 | |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 465 | struct file; |
| 466 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 467 | struct perf_mmap_data { |
| 468 | struct rcu_head rcu_head; |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 469 | int nr_pages; /* nr of data pages */ |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 470 | int writable; /* are we writable */ |
Peter Zijlstra | c5078f7 | 2009-05-05 17:50:24 +0200 | [diff] [blame] | 471 | int nr_locked; /* nr pages mlocked */ |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 472 | |
Peter Zijlstra | c33a0bc | 2009-05-01 12:23:16 +0200 | [diff] [blame] | 473 | atomic_t poll; /* POLL_ for wakeups */ |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 474 | atomic_t events; /* event limit */ |
| 475 | |
Peter Zijlstra | 8e3747c | 2009-06-02 16:16:02 +0200 | [diff] [blame] | 476 | atomic_long_t head; /* write position */ |
| 477 | atomic_long_t done_head; /* completed head */ |
| 478 | |
Peter Zijlstra | c33a0bc | 2009-05-01 12:23:16 +0200 | [diff] [blame] | 479 | atomic_t lock; /* concurrent writes */ |
Peter Zijlstra | c66de4a | 2009-05-05 17:50:22 +0200 | [diff] [blame] | 480 | atomic_t wakeup; /* needs a wakeup */ |
Peter Zijlstra | 43a21ea | 2009-03-25 19:39:37 +0100 | [diff] [blame] | 481 | atomic_t lost; /* nr records lost */ |
Peter Zijlstra | c66de4a | 2009-05-05 17:50:22 +0200 | [diff] [blame] | 482 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 483 | struct perf_counter_mmap_page *user_page; |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 484 | void *data_pages[0]; |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 485 | }; |
| 486 | |
Peter Zijlstra | 671dec5 | 2009-04-06 11:45:02 +0200 | [diff] [blame] | 487 | struct perf_pending_entry { |
| 488 | struct perf_pending_entry *next; |
| 489 | void (*func)(struct perf_pending_entry *); |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 490 | }; |
| 491 | |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 492 | /** |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 493 | * struct perf_counter - performance counter kernel representation: |
| 494 | */ |
| 495 | struct perf_counter { |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 496 | #ifdef CONFIG_PERF_COUNTERS |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 497 | struct list_head list_entry; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 498 | struct list_head event_entry; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 499 | struct list_head sibling_list; |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 500 | int nr_siblings; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 501 | struct perf_counter *group_leader; |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 502 | const struct pmu *pmu; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 503 | |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 504 | enum perf_counter_active_state state; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 505 | atomic64_t count; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 506 | |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 507 | /* |
| 508 | * These are the total time in nanoseconds that the counter |
| 509 | * has been enabled (i.e. eligible to run, and the task has |
| 510 | * been scheduled in, if this is a per-task counter) |
| 511 | * and running (scheduled onto the CPU), respectively. |
| 512 | * |
| 513 | * They are computed from tstamp_enabled, tstamp_running and |
| 514 | * tstamp_stopped when the counter is in INACTIVE or ACTIVE state. |
| 515 | */ |
| 516 | u64 total_time_enabled; |
| 517 | u64 total_time_running; |
| 518 | |
| 519 | /* |
| 520 | * These are timestamps used for computing total_time_enabled |
| 521 | * and total_time_running when the counter is in INACTIVE or |
| 522 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
| 523 | * in time. |
| 524 | * tstamp_enabled: the notional time when the counter was enabled |
| 525 | * tstamp_running: the notional time when the counter was scheduled on |
| 526 | * tstamp_stopped: in INACTIVE state, the notional time when the |
| 527 | * counter was scheduled off. |
| 528 | */ |
| 529 | u64 tstamp_enabled; |
| 530 | u64 tstamp_running; |
| 531 | u64 tstamp_stopped; |
| 532 | |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 533 | struct perf_counter_attr attr; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 534 | struct hw_perf_counter hw; |
| 535 | |
| 536 | struct perf_counter_context *ctx; |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 537 | struct file *filp; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 538 | |
| 539 | /* |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 540 | * These accumulate total time (in nanoseconds) that children |
| 541 | * counters have been enabled and running, respectively. |
| 542 | */ |
| 543 | atomic64_t child_total_time_enabled; |
| 544 | atomic64_t child_total_time_running; |
| 545 | |
| 546 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 547 | * Protect attach/detach and child_list: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 548 | */ |
Peter Zijlstra | fccc714 | 2009-05-23 18:28:56 +0200 | [diff] [blame] | 549 | struct mutex child_mutex; |
| 550 | struct list_head child_list; |
| 551 | struct perf_counter *parent; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 552 | |
| 553 | int oncpu; |
| 554 | int cpu; |
| 555 | |
Peter Zijlstra | 082ff5a | 2009-05-23 18:29:00 +0200 | [diff] [blame] | 556 | struct list_head owner_entry; |
| 557 | struct task_struct *owner; |
| 558 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 559 | /* mmap bits */ |
| 560 | struct mutex mmap_mutex; |
| 561 | atomic_t mmap_count; |
| 562 | struct perf_mmap_data *data; |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 563 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 564 | /* poll related */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 565 | wait_queue_head_t waitq; |
Peter Zijlstra | 3c446b3 | 2009-04-06 11:45:01 +0200 | [diff] [blame] | 566 | struct fasync_struct *fasync; |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 567 | |
| 568 | /* delayed work for NMIs and such */ |
| 569 | int pending_wakeup; |
Peter Zijlstra | 4c9e254 | 2009-04-06 11:45:09 +0200 | [diff] [blame] | 570 | int pending_kill; |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 571 | int pending_disable; |
Peter Zijlstra | 671dec5 | 2009-04-06 11:45:02 +0200 | [diff] [blame] | 572 | struct perf_pending_entry pending; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 573 | |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 574 | atomic_t event_limit; |
| 575 | |
Peter Zijlstra | e077df4 | 2009-03-19 20:26:17 +0100 | [diff] [blame] | 576 | void (*destroy)(struct perf_counter *); |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 577 | struct rcu_head rcu_head; |
Peter Zijlstra | 709e50c | 2009-06-02 14:13:15 +0200 | [diff] [blame] | 578 | |
| 579 | struct pid_namespace *ns; |
Peter Zijlstra | 8e5799b | 2009-06-02 15:08:15 +0200 | [diff] [blame] | 580 | u64 id; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 581 | #endif |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 582 | }; |
| 583 | |
| 584 | /** |
| 585 | * struct perf_counter_context - counter context structure |
| 586 | * |
| 587 | * Used as a container for task counters and CPU counters as well: |
| 588 | */ |
| 589 | struct perf_counter_context { |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 590 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 591 | * Protect the states of the counters in the list, |
| 592 | * nr_active, and the list: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 593 | */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 594 | spinlock_t lock; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 595 | /* |
| 596 | * Protect the list of counters. Locking either mutex or lock |
| 597 | * is sufficient to ensure the list doesn't change; to change |
| 598 | * the list you need to lock both the mutex and the spinlock. |
| 599 | */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 600 | struct mutex mutex; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 601 | |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 602 | struct list_head counter_list; |
| 603 | struct list_head event_list; |
| 604 | int nr_counters; |
| 605 | int nr_active; |
| 606 | int is_active; |
Peter Zijlstra | bfbd338 | 2009-06-24 21:11:59 +0200 | [diff] [blame] | 607 | int nr_stat; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 608 | atomic_t refcount; |
| 609 | struct task_struct *task; |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 610 | |
| 611 | /* |
Peter Zijlstra | 4af4998 | 2009-04-06 11:45:10 +0200 | [diff] [blame] | 612 | * Context clock, runs when context enabled. |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 613 | */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 614 | u64 time; |
| 615 | u64 timestamp; |
Paul Mackerras | 564c2b2 | 2009-05-22 14:27:22 +1000 | [diff] [blame] | 616 | |
| 617 | /* |
| 618 | * These fields let us detect when two contexts have both |
| 619 | * been cloned (inherited) from a common ancestor. |
| 620 | */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 621 | struct perf_counter_context *parent_ctx; |
| 622 | u64 parent_gen; |
| 623 | u64 generation; |
| 624 | int pin_count; |
| 625 | struct rcu_head rcu_head; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 626 | }; |
| 627 | |
| 628 | /** |
| 629 | * struct perf_counter_cpu_context - per cpu counter context structure |
| 630 | */ |
| 631 | struct perf_cpu_context { |
| 632 | struct perf_counter_context ctx; |
| 633 | struct perf_counter_context *task_ctx; |
| 634 | int active_oncpu; |
| 635 | int max_pertask; |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 636 | int exclusive; |
Peter Zijlstra | 96f6d44 | 2009-03-23 18:22:07 +0100 | [diff] [blame] | 637 | |
| 638 | /* |
| 639 | * Recursion avoidance: |
| 640 | * |
| 641 | * task, softirq, irq, nmi context |
| 642 | */ |
Ingo Molnar | 22a4f65 | 2009-06-01 10:13:37 +0200 | [diff] [blame] | 643 | int recursion[4]; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 644 | }; |
| 645 | |
Robert Richter | 829b42d | 2009-04-29 12:46:59 +0200 | [diff] [blame] | 646 | #ifdef CONFIG_PERF_COUNTERS |
| 647 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 648 | /* |
| 649 | * Set by architecture code: |
| 650 | */ |
| 651 | extern int perf_max_counters; |
| 652 | |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 653 | extern const struct pmu *hw_perf_counter_init(struct perf_counter *counter); |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 654 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 655 | 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] | 656 | extern void perf_counter_task_sched_out(struct task_struct *task, |
| 657 | struct task_struct *next, int cpu); |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 658 | extern void perf_counter_task_tick(struct task_struct *task, int cpu); |
Peter Zijlstra | 6ab423e | 2009-05-25 14:45:27 +0200 | [diff] [blame] | 659 | extern int perf_counter_init_task(struct task_struct *child); |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 660 | extern void perf_counter_exit_task(struct task_struct *child); |
Peter Zijlstra | bbbee90 | 2009-05-29 14:25:58 +0200 | [diff] [blame] | 661 | extern void perf_counter_free_task(struct task_struct *task); |
Paul Mackerras | 9974458 | 2009-06-15 21:45:16 +1000 | [diff] [blame] | 662 | extern void set_perf_counter_pending(void); |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 663 | extern void perf_counter_do_pending(void); |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 664 | extern void perf_counter_print_debug(void); |
Peter Zijlstra | 9e35ad3 | 2009-05-13 16:21:38 +0200 | [diff] [blame] | 665 | extern void __perf_disable(void); |
| 666 | extern bool __perf_enable(void); |
| 667 | extern void perf_disable(void); |
| 668 | extern void perf_enable(void); |
Ingo Molnar | 1d1c7dd | 2008-12-11 14:59:31 +0100 | [diff] [blame] | 669 | extern int perf_counter_task_disable(void); |
| 670 | extern int perf_counter_task_enable(void); |
Paul Mackerras | 3cbed42 | 2009-01-09 16:43:42 +1100 | [diff] [blame] | 671 | extern int hw_perf_group_sched_in(struct perf_counter *group_leader, |
| 672 | struct perf_cpu_context *cpuctx, |
| 673 | struct perf_counter_context *ctx, int cpu); |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 674 | extern void perf_counter_update_userpage(struct perf_counter *counter); |
Ingo Molnar | 5c92d12 | 2008-12-11 13:21:10 +0100 | [diff] [blame] | 675 | |
Peter Zijlstra | df1a132 | 2009-06-10 21:02:22 +0200 | [diff] [blame] | 676 | struct perf_sample_data { |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 677 | struct pt_regs *regs; |
| 678 | u64 addr; |
| 679 | u64 period; |
Peter Zijlstra | df1a132 | 2009-06-10 21:02:22 +0200 | [diff] [blame] | 680 | }; |
| 681 | |
| 682 | extern int perf_counter_overflow(struct perf_counter *counter, int nmi, |
| 683 | struct perf_sample_data *data); |
| 684 | |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 685 | /* |
| 686 | * Return 1 for a software counter, 0 for a hardware counter |
| 687 | */ |
| 688 | static inline int is_software_counter(struct perf_counter *counter) |
| 689 | { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 690 | return (counter->attr.type != PERF_TYPE_RAW) && |
Peter Zijlstra | f1a3c97 | 2009-06-11 17:56:09 +0200 | [diff] [blame] | 691 | (counter->attr.type != PERF_TYPE_HARDWARE) && |
| 692 | (counter->attr.type != PERF_TYPE_HW_CACHE); |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 693 | } |
| 694 | |
Peter Zijlstra | f29ac75 | 2009-06-19 18:27:26 +0200 | [diff] [blame] | 695 | extern atomic_t perf_swcounter_enabled[PERF_COUNT_SW_MAX]; |
| 696 | |
| 697 | extern void __perf_swcounter_event(u32, u64, int, struct pt_regs *, u64); |
| 698 | |
| 699 | static inline void |
| 700 | perf_swcounter_event(u32 event, u64 nr, int nmi, struct pt_regs *regs, u64 addr) |
| 701 | { |
| 702 | if (atomic_read(&perf_swcounter_enabled[event])) |
| 703 | __perf_swcounter_event(event, nr, nmi, regs, addr); |
| 704 | } |
Peter Zijlstra | 15dbf27 | 2009-03-13 12:21:32 +0100 | [diff] [blame] | 705 | |
Peter Zijlstra | 089dd79 | 2009-06-05 14:04:55 +0200 | [diff] [blame] | 706 | extern void __perf_counter_mmap(struct vm_area_struct *vma); |
| 707 | |
| 708 | static inline void perf_counter_mmap(struct vm_area_struct *vma) |
| 709 | { |
| 710 | if (vma->vm_flags & VM_EXEC) |
| 711 | __perf_counter_mmap(vma); |
| 712 | } |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 713 | |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 714 | extern void perf_counter_comm(struct task_struct *tsk); |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame] | 715 | extern void perf_counter_fork(struct task_struct *tsk); |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 716 | |
Peter Zijlstra | 394ee07 | 2009-03-30 19:07:14 +0200 | [diff] [blame] | 717 | extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); |
| 718 | |
Peter Zijlstra | 0764771 | 2009-06-11 11:18:36 +0200 | [diff] [blame] | 719 | extern int sysctl_perf_counter_paranoid; |
Peter Zijlstra | c5078f7 | 2009-05-05 17:50:24 +0200 | [diff] [blame] | 720 | extern int sysctl_perf_counter_mlock; |
Peter Zijlstra | df58ab2 | 2009-06-11 11:25:05 +0200 | [diff] [blame] | 721 | extern int sysctl_perf_counter_sample_rate; |
Peter Zijlstra | 1ccd154 | 2009-04-09 10:53:45 +0200 | [diff] [blame] | 722 | |
Ingo Molnar | 0d905bc | 2009-05-04 19:13:30 +0200 | [diff] [blame] | 723 | extern void perf_counter_init(void); |
| 724 | |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 725 | #ifndef perf_misc_flags |
| 726 | #define perf_misc_flags(regs) (user_mode(regs) ? PERF_EVENT_MISC_USER : \ |
| 727 | PERF_EVENT_MISC_KERNEL) |
| 728 | #define perf_instruction_pointer(regs) instruction_pointer(regs) |
| 729 | #endif |
| 730 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 731 | #else |
| 732 | static inline void |
| 733 | perf_counter_task_sched_in(struct task_struct *task, int cpu) { } |
| 734 | static inline void |
Ingo Molnar | 910431c | 2009-05-22 12:32:15 +0200 | [diff] [blame] | 735 | perf_counter_task_sched_out(struct task_struct *task, |
| 736 | struct task_struct *next, int cpu) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 737 | static inline void |
| 738 | perf_counter_task_tick(struct task_struct *task, int cpu) { } |
Ingo Molnar | d3e78ee | 2009-05-28 11:41:50 +0200 | [diff] [blame] | 739 | 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] | 740 | static inline void perf_counter_exit_task(struct task_struct *child) { } |
Peter Zijlstra | bbbee90 | 2009-05-29 14:25:58 +0200 | [diff] [blame] | 741 | static inline void perf_counter_free_task(struct task_struct *task) { } |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 742 | static inline void perf_counter_do_pending(void) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 743 | static inline void perf_counter_print_debug(void) { } |
Peter Zijlstra | 9e35ad3 | 2009-05-13 16:21:38 +0200 | [diff] [blame] | 744 | static inline void perf_disable(void) { } |
| 745 | static inline void perf_enable(void) { } |
Ingo Molnar | 1d1c7dd | 2008-12-11 14:59:31 +0100 | [diff] [blame] | 746 | static inline int perf_counter_task_disable(void) { return -EINVAL; } |
| 747 | static inline int perf_counter_task_enable(void) { return -EINVAL; } |
Peter Zijlstra | 15dbf27 | 2009-03-13 12:21:32 +0100 | [diff] [blame] | 748 | |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 749 | static inline void |
Peter Zijlstra | 78f13e9 | 2009-04-08 15:01:33 +0200 | [diff] [blame] | 750 | perf_swcounter_event(u32 event, u64 nr, int nmi, |
| 751 | struct pt_regs *regs, u64 addr) { } |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 752 | |
Peter Zijlstra | 089dd79 | 2009-06-05 14:04:55 +0200 | [diff] [blame] | 753 | static inline void perf_counter_mmap(struct vm_area_struct *vma) { } |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 754 | static inline void perf_counter_comm(struct task_struct *tsk) { } |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame] | 755 | static inline void perf_counter_fork(struct task_struct *tsk) { } |
Ingo Molnar | 0d905bc | 2009-05-04 19:13:30 +0200 | [diff] [blame] | 756 | static inline void perf_counter_init(void) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 757 | #endif |
| 758 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 759 | #endif /* __KERNEL__ */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 760 | #endif /* _LINUX_PERF_COUNTER_H */ |