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 | */ |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 27 | enum perf_type_id { |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 28 | PERF_TYPE_HARDWARE = 0, |
| 29 | PERF_TYPE_SOFTWARE = 1, |
| 30 | PERF_TYPE_TRACEPOINT = 2, |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 31 | PERF_TYPE_HW_CACHE = 3, |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 32 | PERF_TYPE_RAW = 4, |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 33 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 34 | PERF_TYPE_MAX, /* non ABI */ |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 35 | }; |
| 36 | |
| 37 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 38 | * Generalized performance counter event types, used by the attr.event_id |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 39 | * parameter of the sys_perf_counter_open() syscall: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 40 | */ |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 41 | enum perf_hw_id { |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 42 | /* |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 43 | * Common hardware events, generalized by the kernel: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 44 | */ |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 45 | PERF_COUNT_CPU_CYCLES = 0, |
| 46 | PERF_COUNT_INSTRUCTIONS = 1, |
| 47 | PERF_COUNT_CACHE_REFERENCES = 2, |
| 48 | PERF_COUNT_CACHE_MISSES = 3, |
| 49 | PERF_COUNT_BRANCH_INSTRUCTIONS = 4, |
| 50 | PERF_COUNT_BRANCH_MISSES = 5, |
| 51 | PERF_COUNT_BUS_CYCLES = 6, |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 52 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 53 | PERF_HW_EVENTS_MAX, /* non ABI */ |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 54 | }; |
Ingo Molnar | 6c594c2 | 2008-12-14 12:34:15 +0100 | [diff] [blame] | 55 | |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 56 | /* |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 57 | * Generalized hardware cache counters: |
| 58 | * |
| 59 | * { L1-D, L1-I, L2, LLC, ITLB, DTLB, BPU } x |
| 60 | * { read, write, prefetch } x |
| 61 | * { accesses, misses } |
| 62 | */ |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 63 | enum perf_hw_cache_id { |
| 64 | PERF_COUNT_HW_CACHE_L1D = 0, |
| 65 | PERF_COUNT_HW_CACHE_L1I = 1, |
| 66 | PERF_COUNT_HW_CACHE_L2 = 2, |
| 67 | PERF_COUNT_HW_CACHE_DTLB = 3, |
| 68 | PERF_COUNT_HW_CACHE_ITLB = 4, |
| 69 | PERF_COUNT_HW_CACHE_BPU = 5, |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 70 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 71 | PERF_COUNT_HW_CACHE_MAX, /* non ABI */ |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 72 | }; |
| 73 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 74 | enum perf_hw_cache_op_id { |
| 75 | PERF_COUNT_HW_CACHE_OP_READ = 0, |
| 76 | PERF_COUNT_HW_CACHE_OP_WRITE = 1, |
| 77 | PERF_COUNT_HW_CACHE_OP_PREFETCH = 2, |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 78 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 79 | PERF_COUNT_HW_CACHE_OP_MAX, /* non ABI */ |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 80 | }; |
| 81 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 82 | enum perf_hw_cache_op_result_id { |
| 83 | PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0, |
| 84 | PERF_COUNT_HW_CACHE_RESULT_MISS = 1, |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 85 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 86 | PERF_COUNT_HW_CACHE_RESULT_MAX, /* non ABI */ |
Ingo Molnar | 8326f44 | 2009-06-05 20:22:46 +0200 | [diff] [blame] | 87 | }; |
| 88 | |
| 89 | /* |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 90 | * Special "software" counters provided by the kernel, even if the hardware |
| 91 | * does not support performance counters. These counters measure various |
| 92 | * physical and sw events of the kernel (and allow the profiling of them as |
| 93 | * well): |
| 94 | */ |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 95 | enum perf_sw_ids { |
Peter Zijlstra | b8e8351 | 2009-03-19 20:26:18 +0100 | [diff] [blame] | 96 | PERF_COUNT_CPU_CLOCK = 0, |
| 97 | PERF_COUNT_TASK_CLOCK = 1, |
| 98 | PERF_COUNT_PAGE_FAULTS = 2, |
| 99 | PERF_COUNT_CONTEXT_SWITCHES = 3, |
| 100 | PERF_COUNT_CPU_MIGRATIONS = 4, |
| 101 | PERF_COUNT_PAGE_FAULTS_MIN = 5, |
| 102 | PERF_COUNT_PAGE_FAULTS_MAJ = 6, |
Ingo Molnar | 6c594c2 | 2008-12-14 12:34:15 +0100 | [diff] [blame] | 103 | |
Peter Zijlstra | 1c432d8 | 2009-06-11 13:19:29 +0200 | [diff] [blame^] | 104 | PERF_SW_EVENTS_MAX, /* non ABI */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 105 | }; |
| 106 | |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 107 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 108 | * Bits that can be set in attr.sample_type to request information |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 109 | * in the overflow packets. |
| 110 | */ |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 111 | enum perf_counter_sample_format { |
| 112 | PERF_SAMPLE_IP = 1U << 0, |
| 113 | PERF_SAMPLE_TID = 1U << 1, |
| 114 | PERF_SAMPLE_TIME = 1U << 2, |
| 115 | PERF_SAMPLE_ADDR = 1U << 3, |
| 116 | PERF_SAMPLE_GROUP = 1U << 4, |
| 117 | PERF_SAMPLE_CALLCHAIN = 1U << 5, |
Peter Zijlstra | ac4bcf8 | 2009-06-05 14:44:52 +0200 | [diff] [blame] | 118 | PERF_SAMPLE_ID = 1U << 6, |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 119 | PERF_SAMPLE_CPU = 1U << 7, |
Peter Zijlstra | 689802b | 2009-06-05 15:05:43 +0200 | [diff] [blame] | 120 | PERF_SAMPLE_PERIOD = 1U << 8, |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 121 | }; |
| 122 | |
| 123 | /* |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 124 | * Bits that can be set in attr.read_format to request that |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 125 | * reads on the counter should return the indicated quantities, |
| 126 | * in increasing order of bit value, after the counter value. |
| 127 | */ |
| 128 | enum perf_counter_read_format { |
Peter Zijlstra | 8e5799b | 2009-06-02 15:08:15 +0200 | [diff] [blame] | 129 | PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0, |
| 130 | PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1, |
| 131 | PERF_FORMAT_ID = 1U << 2, |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 132 | }; |
| 133 | |
| 134 | /* |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 135 | * Hardware event to monitor via a performance monitoring counter: |
| 136 | */ |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 137 | struct perf_counter_attr { |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 138 | /* |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 139 | * Major type: hardware/software/tracepoint/etc. |
| 140 | */ |
| 141 | __u32 type; |
| 142 | __u32 __reserved_1; |
| 143 | |
| 144 | /* |
| 145 | * Type specific configuration information. |
Peter Zijlstra | f4a2deb4 | 2009-03-23 18:22:06 +0100 | [diff] [blame] | 146 | */ |
| 147 | __u64 config; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 148 | |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 149 | union { |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 150 | __u64 sample_period; |
| 151 | __u64 sample_freq; |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 152 | }; |
| 153 | |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 154 | __u64 sample_type; |
| 155 | __u64 read_format; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 156 | |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 157 | __u64 disabled : 1, /* off by default */ |
Paul Mackerras | 0475f9e | 2009-02-11 14:35:35 +1100 | [diff] [blame] | 158 | inherit : 1, /* children inherit it */ |
| 159 | pinned : 1, /* must always be on PMU */ |
| 160 | exclusive : 1, /* only group on PMU */ |
| 161 | exclude_user : 1, /* don't count user */ |
| 162 | exclude_kernel : 1, /* ditto kernel */ |
| 163 | exclude_hv : 1, /* ditto hypervisor */ |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 164 | exclude_idle : 1, /* don't count when idle */ |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 165 | mmap : 1, /* include mmap data */ |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 166 | comm : 1, /* include comm data */ |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 167 | freq : 1, /* use freq, not period */ |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 168 | |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 169 | __reserved_2 : 53; |
Paul Mackerras | 2743a5b | 2009-03-04 20:36:51 +1100 | [diff] [blame] | 170 | |
Peter Zijlstra | c457810 | 2009-04-02 11:12:01 +0200 | [diff] [blame] | 171 | __u32 wakeup_events; /* wakeup every n events */ |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 172 | __u32 __reserved_3; |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 173 | |
Peter Zijlstra | e527ea3 | 2009-05-25 14:45:25 +0200 | [diff] [blame] | 174 | __u64 __reserved_4; |
Thomas Gleixner | eab656a | 2008-12-08 19:26:59 +0100 | [diff] [blame] | 175 | }; |
| 176 | |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 177 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 178 | * Ioctls that can be done on a perf counter fd: |
| 179 | */ |
Peter Zijlstra | 08247e3 | 2009-06-02 16:46:57 +0200 | [diff] [blame] | 180 | #define PERF_COUNTER_IOC_ENABLE _IO ('$', 0) |
| 181 | #define PERF_COUNTER_IOC_DISABLE _IO ('$', 1) |
| 182 | #define PERF_COUNTER_IOC_REFRESH _IO ('$', 2) |
| 183 | #define PERF_COUNTER_IOC_RESET _IO ('$', 3) |
| 184 | #define PERF_COUNTER_IOC_PERIOD _IOW('$', 4, u64) |
Peter Zijlstra | 3df5eda | 2009-05-08 18:52:22 +0200 | [diff] [blame] | 185 | |
| 186 | enum perf_counter_ioc_flags { |
| 187 | PERF_IOC_FLAG_GROUP = 1U << 0, |
| 188 | }; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 189 | |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 190 | /* |
| 191 | * Structure of the page that can be mapped via mmap |
| 192 | */ |
| 193 | struct perf_counter_mmap_page { |
| 194 | __u32 version; /* version number of this structure */ |
| 195 | __u32 compat_version; /* lowest version this is compat with */ |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 196 | |
| 197 | /* |
| 198 | * Bits needed to read the hw counters in user-space. |
| 199 | * |
Peter Zijlstra | 92f22a3 | 2009-04-02 11:12:04 +0200 | [diff] [blame] | 200 | * u32 seq; |
| 201 | * s64 count; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 202 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 203 | * do { |
| 204 | * seq = pc->lock; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 205 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 206 | * barrier() |
| 207 | * if (pc->index) { |
| 208 | * count = pmc_read(pc->index - 1); |
| 209 | * count += pc->offset; |
| 210 | * } else |
| 211 | * goto regular_read; |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 212 | * |
Peter Zijlstra | a2e87d0 | 2009-04-06 11:44:59 +0200 | [diff] [blame] | 213 | * barrier(); |
| 214 | * } while (pc->lock != seq); |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 215 | * |
Peter Zijlstra | 92f22a3 | 2009-04-02 11:12:04 +0200 | [diff] [blame] | 216 | * NOTE: for obvious reason this only works on self-monitoring |
| 217 | * processes. |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 218 | */ |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 219 | __u32 lock; /* seqlock for synchronization */ |
| 220 | __u32 index; /* hardware counter identifier */ |
| 221 | __s64 offset; /* add to hardware counter value */ |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 222 | |
Peter Zijlstra | 38ff667 | 2009-03-30 19:07:03 +0200 | [diff] [blame] | 223 | /* |
| 224 | * Control data for the mmap() data buffer. |
| 225 | * |
| 226 | * User-space reading this value should issue an rmb(), on SMP capable |
| 227 | * platforms, after reading this value -- see perf_counter_wakeup(). |
| 228 | */ |
Peter Zijlstra | 8e3747c | 2009-06-02 16:16:02 +0200 | [diff] [blame] | 229 | __u64 data_head; /* head in the data section */ |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 230 | }; |
| 231 | |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 232 | #define PERF_EVENT_MISC_CPUMODE_MASK (3 << 0) |
| 233 | #define PERF_EVENT_MISC_CPUMODE_UNKNOWN (0 << 0) |
Peter Zijlstra | 6b6e5486 | 2009-04-08 15:01:27 +0200 | [diff] [blame] | 234 | #define PERF_EVENT_MISC_KERNEL (1 << 0) |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 235 | #define PERF_EVENT_MISC_USER (2 << 0) |
| 236 | #define PERF_EVENT_MISC_HYPERVISOR (3 << 0) |
Peter Zijlstra | 6b6e5486 | 2009-04-08 15:01:27 +0200 | [diff] [blame] | 237 | #define PERF_EVENT_MISC_OVERFLOW (1 << 2) |
Peter Zijlstra | 6fab019 | 2009-04-08 15:01:26 +0200 | [diff] [blame] | 238 | |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 239 | struct perf_event_header { |
| 240 | __u32 type; |
Peter Zijlstra | 6fab019 | 2009-04-08 15:01:26 +0200 | [diff] [blame] | 241 | __u16 misc; |
| 242 | __u16 size; |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 243 | }; |
| 244 | |
| 245 | enum perf_event_type { |
Peter Zijlstra | 5ed0041 | 2009-03-30 19:07:12 +0200 | [diff] [blame] | 246 | |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 247 | /* |
| 248 | * The MMAP events record the PROT_EXEC mappings so that we can |
| 249 | * correlate userspace IPs to code. They have the following structure: |
| 250 | * |
| 251 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 252 | * struct perf_event_header header; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 253 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 254 | * u32 pid, tid; |
| 255 | * u64 addr; |
| 256 | * u64 len; |
| 257 | * u64 pgoff; |
| 258 | * char filename[]; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 259 | * }; |
| 260 | */ |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 261 | PERF_EVENT_MMAP = 1, |
Peter Zijlstra | ea5d20c | 2009-03-25 12:30:25 +0100 | [diff] [blame] | 262 | |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 263 | /* |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 264 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 265 | * struct perf_event_header header; |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 266 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 267 | * u32 pid, tid; |
| 268 | * char comm[]; |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 269 | * }; |
| 270 | */ |
| 271 | PERF_EVENT_COMM = 3, |
| 272 | |
| 273 | /* |
Peter Zijlstra | 26b119b | 2009-05-20 12:21:20 +0200 | [diff] [blame] | 274 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 275 | * struct perf_event_header header; |
| 276 | * u64 time; |
Peter Zijlstra | 689802b | 2009-06-05 15:05:43 +0200 | [diff] [blame] | 277 | * u64 id; |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 278 | * u64 sample_period; |
Peter Zijlstra | 26b119b | 2009-05-20 12:21:20 +0200 | [diff] [blame] | 279 | * }; |
| 280 | */ |
| 281 | PERF_EVENT_PERIOD = 4, |
| 282 | |
| 283 | /* |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 284 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 285 | * struct perf_event_header header; |
| 286 | * u64 time; |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 287 | * }; |
| 288 | */ |
| 289 | PERF_EVENT_THROTTLE = 5, |
| 290 | PERF_EVENT_UNTHROTTLE = 6, |
| 291 | |
| 292 | /* |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame] | 293 | * struct { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 294 | * struct perf_event_header header; |
| 295 | * u32 pid, ppid; |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame] | 296 | * }; |
| 297 | */ |
| 298 | PERF_EVENT_FORK = 7, |
| 299 | |
| 300 | /* |
Peter Zijlstra | 6b6e5486 | 2009-04-08 15:01:27 +0200 | [diff] [blame] | 301 | * When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field |
| 302 | * will be PERF_RECORD_* |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 303 | * |
| 304 | * struct { |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 305 | * struct perf_event_header header; |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 306 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 307 | * { u64 ip; } && PERF_RECORD_IP |
| 308 | * { u32 pid, tid; } && PERF_RECORD_TID |
| 309 | * { u64 time; } && PERF_RECORD_TIME |
| 310 | * { u64 addr; } && PERF_RECORD_ADDR |
| 311 | * { u64 config; } && PERF_RECORD_CONFIG |
| 312 | * { u32 cpu, res; } && PERF_RECORD_CPU |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 313 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 314 | * { u64 nr; |
Peter Zijlstra | 8e5799b | 2009-06-02 15:08:15 +0200 | [diff] [blame] | 315 | * { u64 id, val; } cnt[nr]; } && PERF_RECORD_GROUP |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 316 | * |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 317 | * { u16 nr, |
| 318 | * hv, |
| 319 | * kernel, |
| 320 | * user; |
| 321 | * u64 ips[nr]; } && PERF_RECORD_CALLCHAIN |
Peter Zijlstra | 0c593b3 | 2009-04-06 11:45:08 +0200 | [diff] [blame] | 322 | * }; |
Peter Zijlstra | 8a057d8 | 2009-04-02 11:11:59 +0200 | [diff] [blame] | 323 | */ |
Peter Zijlstra | 5c14819 | 2009-03-25 12:30:23 +0100 | [diff] [blame] | 324 | }; |
| 325 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 326 | #ifdef __KERNEL__ |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 327 | /* |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 328 | * Kernel-internal data types and definitions: |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 329 | */ |
| 330 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 331 | #ifdef CONFIG_PERF_COUNTERS |
| 332 | # include <asm/perf_counter.h> |
| 333 | #endif |
| 334 | |
| 335 | #include <linux/list.h> |
| 336 | #include <linux/mutex.h> |
| 337 | #include <linux/rculist.h> |
| 338 | #include <linux/rcupdate.h> |
| 339 | #include <linux/spinlock.h> |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 340 | #include <linux/hrtimer.h> |
Peter Zijlstra | 3c446b3d | 2009-04-06 11:45:01 +0200 | [diff] [blame] | 341 | #include <linux/fs.h> |
Peter Zijlstra | 709e50c | 2009-06-02 14:13:15 +0200 | [diff] [blame] | 342 | #include <linux/pid_namespace.h> |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 343 | #include <asm/atomic.h> |
| 344 | |
| 345 | struct task_struct; |
| 346 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 347 | /** |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 348 | * struct hw_perf_counter - performance counter hardware details: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 349 | */ |
| 350 | struct hw_perf_counter { |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 351 | #ifdef CONFIG_PERF_COUNTERS |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 352 | union { |
| 353 | struct { /* hardware */ |
| 354 | u64 config; |
| 355 | unsigned long config_base; |
| 356 | unsigned long counter_base; |
Robert Richter | 6f00cad | 2009-04-29 12:47:17 +0200 | [diff] [blame] | 357 | int idx; |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 358 | }; |
| 359 | union { /* software */ |
| 360 | atomic64_t count; |
| 361 | struct hrtimer hrtimer; |
| 362 | }; |
| 363 | }; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 364 | atomic64_t prev_count; |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 365 | u64 sample_period; |
Peter Zijlstra | 9e350de | 2009-06-10 21:34:59 +0200 | [diff] [blame] | 366 | u64 last_period; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 367 | atomic64_t period_left; |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 368 | u64 interrupts; |
Peter Zijlstra | 6a24ed6c | 2009-06-05 18:01:29 +0200 | [diff] [blame] | 369 | |
| 370 | u64 freq_count; |
| 371 | u64 freq_interrupts; |
Peter Zijlstra | bd2b5b1 | 2009-06-10 13:40:57 +0200 | [diff] [blame] | 372 | u64 freq_stamp; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 373 | #endif |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 374 | }; |
| 375 | |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 376 | struct perf_counter; |
| 377 | |
| 378 | /** |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 379 | * struct pmu - generic performance monitoring unit |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 380 | */ |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 381 | struct pmu { |
Ingo Molnar | 95cdd2e | 2008-12-21 13:50:42 +0100 | [diff] [blame] | 382 | int (*enable) (struct perf_counter *counter); |
Ingo Molnar | 7671581 | 2008-12-17 14:20:28 +0100 | [diff] [blame] | 383 | void (*disable) (struct perf_counter *counter); |
| 384 | void (*read) (struct perf_counter *counter); |
Peter Zijlstra | a78ac32 | 2009-05-25 17:39:05 +0200 | [diff] [blame] | 385 | void (*unthrottle) (struct perf_counter *counter); |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 386 | }; |
| 387 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 388 | /** |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 389 | * enum perf_counter_active_state - the states of a counter |
| 390 | */ |
| 391 | enum perf_counter_active_state { |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 392 | PERF_COUNTER_STATE_ERROR = -2, |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 393 | PERF_COUNTER_STATE_OFF = -1, |
| 394 | PERF_COUNTER_STATE_INACTIVE = 0, |
| 395 | PERF_COUNTER_STATE_ACTIVE = 1, |
| 396 | }; |
| 397 | |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 398 | struct file; |
| 399 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 400 | struct perf_mmap_data { |
| 401 | struct rcu_head rcu_head; |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 402 | int nr_pages; /* nr of data pages */ |
Peter Zijlstra | c5078f7 | 2009-05-05 17:50:24 +0200 | [diff] [blame] | 403 | int nr_locked; /* nr pages mlocked */ |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 404 | |
Peter Zijlstra | c33a0bc | 2009-05-01 12:23:16 +0200 | [diff] [blame] | 405 | atomic_t poll; /* POLL_ for wakeups */ |
Peter Zijlstra | 8740f94 | 2009-04-08 15:01:29 +0200 | [diff] [blame] | 406 | atomic_t events; /* event limit */ |
| 407 | |
Peter Zijlstra | 8e3747c | 2009-06-02 16:16:02 +0200 | [diff] [blame] | 408 | atomic_long_t head; /* write position */ |
| 409 | atomic_long_t done_head; /* completed head */ |
| 410 | |
Peter Zijlstra | c33a0bc | 2009-05-01 12:23:16 +0200 | [diff] [blame] | 411 | atomic_t lock; /* concurrent writes */ |
| 412 | |
Peter Zijlstra | c66de4a | 2009-05-05 17:50:22 +0200 | [diff] [blame] | 413 | atomic_t wakeup; /* needs a wakeup */ |
| 414 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 415 | struct perf_counter_mmap_page *user_page; |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 416 | void *data_pages[0]; |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 417 | }; |
| 418 | |
Peter Zijlstra | 671dec5 | 2009-04-06 11:45:02 +0200 | [diff] [blame] | 419 | struct perf_pending_entry { |
| 420 | struct perf_pending_entry *next; |
| 421 | void (*func)(struct perf_pending_entry *); |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 422 | }; |
| 423 | |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 424 | /** |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 425 | * struct perf_counter - performance counter kernel representation: |
| 426 | */ |
| 427 | struct perf_counter { |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 428 | #ifdef CONFIG_PERF_COUNTERS |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 429 | struct list_head list_entry; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 430 | struct list_head event_entry; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 431 | struct list_head sibling_list; |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 432 | int nr_siblings; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 433 | struct perf_counter *group_leader; |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 434 | const struct pmu *pmu; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 435 | |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 436 | enum perf_counter_active_state state; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 437 | atomic64_t count; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 438 | |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 439 | /* |
| 440 | * These are the total time in nanoseconds that the counter |
| 441 | * has been enabled (i.e. eligible to run, and the task has |
| 442 | * been scheduled in, if this is a per-task counter) |
| 443 | * and running (scheduled onto the CPU), respectively. |
| 444 | * |
| 445 | * They are computed from tstamp_enabled, tstamp_running and |
| 446 | * tstamp_stopped when the counter is in INACTIVE or ACTIVE state. |
| 447 | */ |
| 448 | u64 total_time_enabled; |
| 449 | u64 total_time_running; |
| 450 | |
| 451 | /* |
| 452 | * These are timestamps used for computing total_time_enabled |
| 453 | * and total_time_running when the counter is in INACTIVE or |
| 454 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
| 455 | * in time. |
| 456 | * tstamp_enabled: the notional time when the counter was enabled |
| 457 | * tstamp_running: the notional time when the counter was scheduled on |
| 458 | * tstamp_stopped: in INACTIVE state, the notional time when the |
| 459 | * counter was scheduled off. |
| 460 | */ |
| 461 | u64 tstamp_enabled; |
| 462 | u64 tstamp_running; |
| 463 | u64 tstamp_stopped; |
| 464 | |
Peter Zijlstra | 0d48696 | 2009-06-02 19:22:16 +0200 | [diff] [blame] | 465 | struct perf_counter_attr attr; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 466 | struct hw_perf_counter hw; |
| 467 | |
| 468 | struct perf_counter_context *ctx; |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 469 | struct file *filp; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 470 | |
| 471 | /* |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 472 | * These accumulate total time (in nanoseconds) that children |
| 473 | * counters have been enabled and running, respectively. |
| 474 | */ |
| 475 | atomic64_t child_total_time_enabled; |
| 476 | atomic64_t child_total_time_running; |
| 477 | |
| 478 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 479 | * Protect attach/detach and child_list: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 480 | */ |
Peter Zijlstra | fccc714 | 2009-05-23 18:28:56 +0200 | [diff] [blame] | 481 | struct mutex child_mutex; |
| 482 | struct list_head child_list; |
| 483 | struct perf_counter *parent; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 484 | |
| 485 | int oncpu; |
| 486 | int cpu; |
| 487 | |
Peter Zijlstra | 082ff5a | 2009-05-23 18:29:00 +0200 | [diff] [blame] | 488 | struct list_head owner_entry; |
| 489 | struct task_struct *owner; |
| 490 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 491 | /* mmap bits */ |
| 492 | struct mutex mmap_mutex; |
| 493 | atomic_t mmap_count; |
| 494 | struct perf_mmap_data *data; |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 495 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 496 | /* poll related */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 497 | wait_queue_head_t waitq; |
Peter Zijlstra | 3c446b3d | 2009-04-06 11:45:01 +0200 | [diff] [blame] | 498 | struct fasync_struct *fasync; |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 499 | |
| 500 | /* delayed work for NMIs and such */ |
| 501 | int pending_wakeup; |
Peter Zijlstra | 4c9e254 | 2009-04-06 11:45:09 +0200 | [diff] [blame] | 502 | int pending_kill; |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 503 | int pending_disable; |
Peter Zijlstra | 671dec5 | 2009-04-06 11:45:02 +0200 | [diff] [blame] | 504 | struct perf_pending_entry pending; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 505 | |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 506 | atomic_t event_limit; |
| 507 | |
Peter Zijlstra | e077df4 | 2009-03-19 20:26:17 +0100 | [diff] [blame] | 508 | void (*destroy)(struct perf_counter *); |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 509 | struct rcu_head rcu_head; |
Peter Zijlstra | 709e50c | 2009-06-02 14:13:15 +0200 | [diff] [blame] | 510 | |
| 511 | struct pid_namespace *ns; |
Peter Zijlstra | 8e5799b | 2009-06-02 15:08:15 +0200 | [diff] [blame] | 512 | u64 id; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 513 | #endif |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 514 | }; |
| 515 | |
| 516 | /** |
| 517 | * struct perf_counter_context - counter context structure |
| 518 | * |
| 519 | * Used as a container for task counters and CPU counters as well: |
| 520 | */ |
| 521 | struct perf_counter_context { |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 522 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 523 | * Protect the states of the counters in the list, |
| 524 | * nr_active, and the list: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 525 | */ |
| 526 | spinlock_t lock; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 527 | /* |
| 528 | * Protect the list of counters. Locking either mutex or lock |
| 529 | * is sufficient to ensure the list doesn't change; to change |
| 530 | * the list you need to lock both the mutex and the spinlock. |
| 531 | */ |
| 532 | struct mutex mutex; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 533 | |
| 534 | struct list_head counter_list; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 535 | struct list_head event_list; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 536 | int nr_counters; |
| 537 | int nr_active; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 538 | int is_active; |
Paul Mackerras | a63eaf3 | 2009-05-22 14:17:31 +1000 | [diff] [blame] | 539 | atomic_t refcount; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 540 | struct task_struct *task; |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 541 | |
| 542 | /* |
Peter Zijlstra | 4af4998 | 2009-04-06 11:45:10 +0200 | [diff] [blame] | 543 | * Context clock, runs when context enabled. |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 544 | */ |
Peter Zijlstra | 4af4998 | 2009-04-06 11:45:10 +0200 | [diff] [blame] | 545 | u64 time; |
| 546 | u64 timestamp; |
Paul Mackerras | 564c2b2 | 2009-05-22 14:27:22 +1000 | [diff] [blame] | 547 | |
| 548 | /* |
| 549 | * These fields let us detect when two contexts have both |
| 550 | * been cloned (inherited) from a common ancestor. |
| 551 | */ |
| 552 | struct perf_counter_context *parent_ctx; |
Paul Mackerras | c93f766 | 2009-05-28 22:18:17 +1000 | [diff] [blame] | 553 | u64 parent_gen; |
| 554 | u64 generation; |
Paul Mackerras | 25346b93 | 2009-06-01 17:48:12 +1000 | [diff] [blame] | 555 | int pin_count; |
Paul Mackerras | c93f766 | 2009-05-28 22:18:17 +1000 | [diff] [blame] | 556 | struct rcu_head rcu_head; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 557 | }; |
| 558 | |
| 559 | /** |
| 560 | * struct perf_counter_cpu_context - per cpu counter context structure |
| 561 | */ |
| 562 | struct perf_cpu_context { |
| 563 | struct perf_counter_context ctx; |
| 564 | struct perf_counter_context *task_ctx; |
| 565 | int active_oncpu; |
| 566 | int max_pertask; |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 567 | int exclusive; |
Peter Zijlstra | 96f6d44 | 2009-03-23 18:22:07 +0100 | [diff] [blame] | 568 | |
| 569 | /* |
| 570 | * Recursion avoidance: |
| 571 | * |
| 572 | * task, softirq, irq, nmi context |
| 573 | */ |
Ingo Molnar | 22a4f65 | 2009-06-01 10:13:37 +0200 | [diff] [blame] | 574 | int recursion[4]; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 575 | }; |
| 576 | |
Robert Richter | 829b42d | 2009-04-29 12:46:59 +0200 | [diff] [blame] | 577 | #ifdef CONFIG_PERF_COUNTERS |
| 578 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 579 | /* |
| 580 | * Set by architecture code: |
| 581 | */ |
| 582 | extern int perf_max_counters; |
| 583 | |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 584 | extern const struct pmu *hw_perf_counter_init(struct perf_counter *counter); |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 585 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 586 | 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] | 587 | extern void perf_counter_task_sched_out(struct task_struct *task, |
| 588 | struct task_struct *next, int cpu); |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 589 | extern void perf_counter_task_tick(struct task_struct *task, int cpu); |
Peter Zijlstra | 6ab423e | 2009-05-25 14:45:27 +0200 | [diff] [blame] | 590 | extern int perf_counter_init_task(struct task_struct *child); |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 591 | extern void perf_counter_exit_task(struct task_struct *child); |
Peter Zijlstra | bbbee90 | 2009-05-29 14:25:58 +0200 | [diff] [blame] | 592 | extern void perf_counter_free_task(struct task_struct *task); |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 593 | extern void perf_counter_do_pending(void); |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 594 | extern void perf_counter_print_debug(void); |
Peter Zijlstra | 9e35ad3 | 2009-05-13 16:21:38 +0200 | [diff] [blame] | 595 | extern void __perf_disable(void); |
| 596 | extern bool __perf_enable(void); |
| 597 | extern void perf_disable(void); |
| 598 | extern void perf_enable(void); |
Ingo Molnar | 1d1c7dd | 2008-12-11 14:59:31 +0100 | [diff] [blame] | 599 | extern int perf_counter_task_disable(void); |
| 600 | extern int perf_counter_task_enable(void); |
Paul Mackerras | 3cbed42 | 2009-01-09 16:43:42 +1100 | [diff] [blame] | 601 | extern int hw_perf_group_sched_in(struct perf_counter *group_leader, |
| 602 | struct perf_cpu_context *cpuctx, |
| 603 | struct perf_counter_context *ctx, int cpu); |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 604 | extern void perf_counter_update_userpage(struct perf_counter *counter); |
Ingo Molnar | 5c92d12 | 2008-12-11 13:21:10 +0100 | [diff] [blame] | 605 | |
Peter Zijlstra | df1a132 | 2009-06-10 21:02:22 +0200 | [diff] [blame] | 606 | struct perf_sample_data { |
Peter Zijlstra | 9e350de | 2009-06-10 21:34:59 +0200 | [diff] [blame] | 607 | struct pt_regs *regs; |
| 608 | u64 addr; |
| 609 | u64 period; |
Peter Zijlstra | df1a132 | 2009-06-10 21:02:22 +0200 | [diff] [blame] | 610 | }; |
| 611 | |
| 612 | extern int perf_counter_overflow(struct perf_counter *counter, int nmi, |
| 613 | struct perf_sample_data *data); |
| 614 | |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 615 | /* |
| 616 | * Return 1 for a software counter, 0 for a hardware counter |
| 617 | */ |
| 618 | static inline int is_software_counter(struct perf_counter *counter) |
| 619 | { |
Ingo Molnar | a21ca2c | 2009-06-06 09:58:57 +0200 | [diff] [blame] | 620 | return (counter->attr.type != PERF_TYPE_RAW) && |
| 621 | (counter->attr.type != PERF_TYPE_HARDWARE); |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 622 | } |
| 623 | |
Peter Zijlstra | 78f13e9 | 2009-04-08 15:01:33 +0200 | [diff] [blame] | 624 | extern void perf_swcounter_event(u32, u64, int, struct pt_regs *, u64); |
Peter Zijlstra | 15dbf27 | 2009-03-13 12:21:32 +0100 | [diff] [blame] | 625 | |
Peter Zijlstra | 089dd79 | 2009-06-05 14:04:55 +0200 | [diff] [blame] | 626 | extern void __perf_counter_mmap(struct vm_area_struct *vma); |
| 627 | |
| 628 | static inline void perf_counter_mmap(struct vm_area_struct *vma) |
| 629 | { |
| 630 | if (vma->vm_flags & VM_EXEC) |
| 631 | __perf_counter_mmap(vma); |
| 632 | } |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 633 | |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 634 | extern void perf_counter_comm(struct task_struct *tsk); |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame] | 635 | extern void perf_counter_fork(struct task_struct *tsk); |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 636 | |
Paul Mackerras | 3f731ca | 2009-06-01 17:52:30 +1000 | [diff] [blame] | 637 | extern void perf_counter_task_migration(struct task_struct *task, int cpu); |
| 638 | |
Peter Zijlstra | 9c03d88 | 2009-04-06 11:45:00 +0200 | [diff] [blame] | 639 | #define MAX_STACK_DEPTH 255 |
Peter Zijlstra | 394ee07 | 2009-03-30 19:07:14 +0200 | [diff] [blame] | 640 | |
| 641 | struct perf_callchain_entry { |
Peter Zijlstra | 9c03d88 | 2009-04-06 11:45:00 +0200 | [diff] [blame] | 642 | u16 nr, hv, kernel, user; |
Peter Zijlstra | 394ee07 | 2009-03-30 19:07:14 +0200 | [diff] [blame] | 643 | u64 ip[MAX_STACK_DEPTH]; |
| 644 | }; |
| 645 | |
| 646 | extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); |
| 647 | |
Peter Zijlstra | 0764771 | 2009-06-11 11:18:36 +0200 | [diff] [blame] | 648 | extern int sysctl_perf_counter_paranoid; |
Peter Zijlstra | c5078f7 | 2009-05-05 17:50:24 +0200 | [diff] [blame] | 649 | extern int sysctl_perf_counter_mlock; |
Peter Zijlstra | df58ab2 | 2009-06-11 11:25:05 +0200 | [diff] [blame] | 650 | extern int sysctl_perf_counter_sample_rate; |
Peter Zijlstra | 1ccd154 | 2009-04-09 10:53:45 +0200 | [diff] [blame] | 651 | |
Ingo Molnar | 0d905bc | 2009-05-04 19:13:30 +0200 | [diff] [blame] | 652 | extern void perf_counter_init(void); |
| 653 | |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 654 | #ifndef perf_misc_flags |
| 655 | #define perf_misc_flags(regs) (user_mode(regs) ? PERF_EVENT_MISC_USER : \ |
| 656 | PERF_EVENT_MISC_KERNEL) |
| 657 | #define perf_instruction_pointer(regs) instruction_pointer(regs) |
| 658 | #endif |
| 659 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 660 | #else |
| 661 | static inline void |
| 662 | perf_counter_task_sched_in(struct task_struct *task, int cpu) { } |
| 663 | static inline void |
Ingo Molnar | 910431c | 2009-05-22 12:32:15 +0200 | [diff] [blame] | 664 | perf_counter_task_sched_out(struct task_struct *task, |
| 665 | struct task_struct *next, int cpu) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 666 | static inline void |
| 667 | perf_counter_task_tick(struct task_struct *task, int cpu) { } |
Ingo Molnar | d3e78ee | 2009-05-28 11:41:50 +0200 | [diff] [blame] | 668 | 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] | 669 | static inline void perf_counter_exit_task(struct task_struct *child) { } |
Peter Zijlstra | bbbee90 | 2009-05-29 14:25:58 +0200 | [diff] [blame] | 670 | static inline void perf_counter_free_task(struct task_struct *task) { } |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 671 | static inline void perf_counter_do_pending(void) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 672 | static inline void perf_counter_print_debug(void) { } |
Peter Zijlstra | 9e35ad3 | 2009-05-13 16:21:38 +0200 | [diff] [blame] | 673 | static inline void perf_disable(void) { } |
| 674 | static inline void perf_enable(void) { } |
Ingo Molnar | 1d1c7dd | 2008-12-11 14:59:31 +0100 | [diff] [blame] | 675 | static inline int perf_counter_task_disable(void) { return -EINVAL; } |
| 676 | static inline int perf_counter_task_enable(void) { return -EINVAL; } |
Peter Zijlstra | 15dbf27 | 2009-03-13 12:21:32 +0100 | [diff] [blame] | 677 | |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 678 | static inline void |
Peter Zijlstra | 78f13e9 | 2009-04-08 15:01:33 +0200 | [diff] [blame] | 679 | perf_swcounter_event(u32 event, u64 nr, int nmi, |
| 680 | struct pt_regs *regs, u64 addr) { } |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 681 | |
Peter Zijlstra | 089dd79 | 2009-06-05 14:04:55 +0200 | [diff] [blame] | 682 | static inline void perf_counter_mmap(struct vm_area_struct *vma) { } |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 683 | static inline void perf_counter_comm(struct task_struct *tsk) { } |
Peter Zijlstra | 60313eb | 2009-06-04 16:53:44 +0200 | [diff] [blame] | 684 | static inline void perf_counter_fork(struct task_struct *tsk) { } |
Ingo Molnar | 0d905bc | 2009-05-04 19:13:30 +0200 | [diff] [blame] | 685 | static inline void perf_counter_init(void) { } |
Paul Mackerras | 3f731ca | 2009-06-01 17:52:30 +1000 | [diff] [blame] | 686 | static inline void perf_counter_task_migration(struct task_struct *task, |
| 687 | int cpu) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 688 | #endif |
| 689 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 690 | #endif /* __KERNEL__ */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 691 | #endif /* _LINUX_PERF_COUNTER_H */ |