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Thomas Gleixner0793a612008-12-04 20:12:29 +01001/*
Ingo Molnar57c0c152009-09-21 12:20:38 +02002 * Performance events:
Thomas Gleixner0793a612008-12-04 20:12:29 +01003 *
Ingo Molnara3084442009-06-11 14:44:26 +02004 * 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 Gleixner0793a612008-12-04 20:12:29 +01007 *
Ingo Molnar57c0c152009-09-21 12:20:38 +02008 * Data type definitions, declarations, prototypes.
Thomas Gleixner0793a612008-12-04 20:12:29 +01009 *
Ingo Molnara3084442009-06-11 14:44:26 +020010 * Started by: Thomas Gleixner and Ingo Molnar
Thomas Gleixner0793a612008-12-04 20:12:29 +010011 *
Ingo Molnar57c0c152009-09-21 12:20:38 +020012 * For licencing details see kernel-base/COPYING
Thomas Gleixner0793a612008-12-04 20:12:29 +010013 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +020014#ifndef _LINUX_PERF_EVENT_H
15#define _LINUX_PERF_EVENT_H
Thomas Gleixner0793a612008-12-04 20:12:29 +010016
Paul Mackerrasf3dfd262009-02-26 22:43:46 +110017#include <linux/types.h>
18#include <linux/ioctl.h>
Paul Mackerras9aaa1312009-03-21 15:31:47 +110019#include <asm/byteorder.h>
Thomas Gleixner0793a612008-12-04 20:12:29 +010020
21/*
Ingo Molnar9f66a382008-12-10 12:33:23 +010022 * User-space ABI bits:
23 */
24
25/*
Peter Zijlstra0d486962009-06-02 19:22:16 +020026 * attr.type
Peter Zijlstrab8e83512009-03-19 20:26:18 +010027 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020028enum perf_type_id {
Ingo Molnara3084442009-06-11 14:44:26 +020029 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 Zijlstrab8e83512009-03-19 20:26:18 +010034
Ingo Molnara3084442009-06-11 14:44:26 +020035 PERF_TYPE_MAX, /* non-ABI */
Peter Zijlstrab8e83512009-03-19 20:26:18 +010036};
37
38/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020039 * Generalized performance event event_id types, used by the
40 * attr.event_id parameter of the sys_perf_event_open()
Ingo Molnara3084442009-06-11 14:44:26 +020041 * syscall:
Thomas Gleixner0793a612008-12-04 20:12:29 +010042 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020043enum perf_hw_id {
Thomas Gleixner0793a612008-12-04 20:12:29 +010044 /*
Ingo Molnar9f66a382008-12-10 12:33:23 +010045 * Common hardware events, generalized by the kernel:
Thomas Gleixner0793a612008-12-04 20:12:29 +010046 */
Peter Zijlstraf4dbfa82009-06-11 14:06:28 +020047 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 Molnar9f66a382008-12-10 12:33:23 +010054
Ingo Molnara3084442009-06-11 14:44:26 +020055 PERF_COUNT_HW_MAX, /* non-ABI */
Peter Zijlstrab8e83512009-03-19 20:26:18 +010056};
Ingo Molnar6c594c22008-12-14 12:34:15 +010057
Peter Zijlstrab8e83512009-03-19 20:26:18 +010058/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020059 * Generalized hardware cache events:
Ingo Molnar8326f442009-06-05 20:22:46 +020060 *
Peter Zijlstra8be6e8f2009-06-11 14:19:11 +020061 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
Ingo Molnar8326f442009-06-05 20:22:46 +020062 * { read, write, prefetch } x
63 * { accesses, misses }
64 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020065enum perf_hw_cache_id {
Ingo Molnara3084442009-06-11 14:44:26 +020066 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 Molnar8326f442009-06-05 20:22:46 +020072
Ingo Molnara3084442009-06-11 14:44:26 +020073 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020074};
75
Peter Zijlstra1c432d82009-06-11 13:19:29 +020076enum perf_hw_cache_op_id {
Ingo Molnara3084442009-06-11 14:44:26 +020077 PERF_COUNT_HW_CACHE_OP_READ = 0,
78 PERF_COUNT_HW_CACHE_OP_WRITE = 1,
79 PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
Ingo Molnar8326f442009-06-05 20:22:46 +020080
Ingo Molnara3084442009-06-11 14:44:26 +020081 PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020082};
83
Peter Zijlstra1c432d82009-06-11 13:19:29 +020084enum perf_hw_cache_op_result_id {
85 PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
86 PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
Ingo Molnar8326f442009-06-05 20:22:46 +020087
Ingo Molnara3084442009-06-11 14:44:26 +020088 PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020089};
90
91/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020092 * Special "software" events provided by the kernel, even if the hardware
93 * does not support performance events. These events measure various
Peter Zijlstrab8e83512009-03-19 20:26:18 +010094 * physical and sw events of the kernel (and allow the profiling of them as
95 * well):
96 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020097enum perf_sw_ids {
Ingo Molnara3084442009-06-11 14:44:26 +020098 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 Molnar6c594c22008-12-14 12:34:15 +0100105
Ingo Molnara3084442009-06-11 14:44:26 +0200106 PERF_COUNT_SW_MAX, /* non-ABI */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100107};
108
Ingo Molnar9f66a382008-12-10 12:33:23 +0100109/*
Peter Zijlstra0d486962009-06-02 19:22:16 +0200110 * Bits that can be set in attr.sample_type to request information
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200111 * in the overflow packets.
112 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200113enum perf_event_sample_format {
Ingo Molnara3084442009-06-11 14:44:26 +0200114 PERF_SAMPLE_IP = 1U << 0,
115 PERF_SAMPLE_TID = 1U << 1,
116 PERF_SAMPLE_TIME = 1U << 2,
117 PERF_SAMPLE_ADDR = 1U << 3,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200118 PERF_SAMPLE_READ = 1U << 4,
Ingo Molnara3084442009-06-11 14:44:26 +0200119 PERF_SAMPLE_CALLCHAIN = 1U << 5,
120 PERF_SAMPLE_ID = 1U << 6,
121 PERF_SAMPLE_CPU = 1U << 7,
122 PERF_SAMPLE_PERIOD = 1U << 8,
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200123 PERF_SAMPLE_STREAM_ID = 1U << 9,
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200124 PERF_SAMPLE_RAW = 1U << 10,
Peter Zijlstra974802e2009-06-12 12:46:55 +0200125
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200126 PERF_SAMPLE_MAX = 1U << 11, /* non-ABI */
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200127};
128
129/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200130 * The format of the data returned by read() on a perf event fd,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200131 * as specified by attr.read_format:
132 *
133 * struct read_format {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200134 * { u64 value;
135 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
136 * { u64 time_running; } && PERF_FORMAT_RUNNING
137 * { u64 id; } && PERF_FORMAT_ID
138 * } && !PERF_FORMAT_GROUP
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200139 *
Ingo Molnar57c0c152009-09-21 12:20:38 +0200140 * { u64 nr;
141 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
142 * { u64 time_running; } && PERF_FORMAT_RUNNING
143 * { u64 value;
144 * { u64 id; } && PERF_FORMAT_ID
145 * } cntr[nr];
146 * } && PERF_FORMAT_GROUP
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200147 * };
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100148 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200149enum perf_event_read_format {
Ingo Molnara3084442009-06-11 14:44:26 +0200150 PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0,
151 PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1,
152 PERF_FORMAT_ID = 1U << 2,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200153 PERF_FORMAT_GROUP = 1U << 3,
Peter Zijlstra974802e2009-06-12 12:46:55 +0200154
Ingo Molnar57c0c152009-09-21 12:20:38 +0200155 PERF_FORMAT_MAX = 1U << 4, /* non-ABI */
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100156};
157
Peter Zijlstra974802e2009-06-12 12:46:55 +0200158#define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */
159
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100160/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200161 * Hardware event_id to monitor via a performance monitoring event:
Ingo Molnar9f66a382008-12-10 12:33:23 +0100162 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200163struct perf_event_attr {
Peter Zijlstra974802e2009-06-12 12:46:55 +0200164
Peter Zijlstraf4a2deb42009-03-23 18:22:06 +0100165 /*
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200166 * Major type: hardware/software/tracepoint/etc.
167 */
168 __u32 type;
Peter Zijlstra974802e2009-06-12 12:46:55 +0200169
170 /*
171 * Size of the attr structure, for fwd/bwd compat.
172 */
173 __u32 size;
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200174
175 /*
176 * Type specific configuration information.
Peter Zijlstraf4a2deb42009-03-23 18:22:06 +0100177 */
178 __u64 config;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100179
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200180 union {
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200181 __u64 sample_period;
182 __u64 sample_freq;
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200183 };
184
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200185 __u64 sample_type;
186 __u64 read_format;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100187
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100188 __u64 disabled : 1, /* off by default */
Paul Mackerras0475f9e2009-02-11 14:35:35 +1100189 inherit : 1, /* children inherit it */
190 pinned : 1, /* must always be on PMU */
191 exclusive : 1, /* only group on PMU */
192 exclude_user : 1, /* don't count user */
193 exclude_kernel : 1, /* ditto kernel */
194 exclude_hv : 1, /* ditto hypervisor */
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100195 exclude_idle : 1, /* don't count when idle */
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200196 mmap : 1, /* include mmap data */
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200197 comm : 1, /* include comm data */
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200198 freq : 1, /* use freq, not period */
Peter Zijlstrabfbd3382009-06-24 21:11:59 +0200199 inherit_stat : 1, /* per task counts */
Paul Mackerras57e79862009-06-30 16:07:19 +1000200 enable_on_exec : 1, /* next exec enables */
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200201 task : 1, /* trace fork/exit */
Peter Zijlstra2667de82009-09-17 19:01:10 +0200202 watermark : 1, /* wakeup_watermark */
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100203
Peter Zijlstra2667de82009-09-17 19:01:10 +0200204 __reserved_1 : 49;
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100205
Peter Zijlstra2667de82009-09-17 19:01:10 +0200206 union {
207 __u32 wakeup_events; /* wakeup every n events */
208 __u32 wakeup_watermark; /* bytes before wakeup */
209 };
Peter Zijlstra974802e2009-06-12 12:46:55 +0200210 __u32 __reserved_2;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100211
Peter Zijlstra974802e2009-06-12 12:46:55 +0200212 __u64 __reserved_3;
Thomas Gleixnereab656a2008-12-08 19:26:59 +0100213};
214
Ingo Molnar9f66a382008-12-10 12:33:23 +0100215/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200216 * Ioctls that can be done on a perf event fd:
Paul Mackerrasd859e292009-01-17 18:10:22 +1100217 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200218#define PERF_EVENT_IOC_ENABLE _IO ('$', 0)
Ingo Molnar57c0c152009-09-21 12:20:38 +0200219#define PERF_EVENT_IOC_DISABLE _IO ('$', 1)
220#define PERF_EVENT_IOC_REFRESH _IO ('$', 2)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200221#define PERF_EVENT_IOC_RESET _IO ('$', 3)
222#define PERF_EVENT_IOC_PERIOD _IOW('$', 4, u64)
223#define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
Peter Zijlstra3df5eda2009-05-08 18:52:22 +0200224
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200225enum perf_event_ioc_flags {
Peter Zijlstra3df5eda2009-05-08 18:52:22 +0200226 PERF_IOC_FLAG_GROUP = 1U << 0,
227};
Paul Mackerrasd859e292009-01-17 18:10:22 +1100228
Paul Mackerras37d81822009-03-23 18:22:08 +0100229/*
230 * Structure of the page that can be mapped via mmap
231 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200232struct perf_event_mmap_page {
Paul Mackerras37d81822009-03-23 18:22:08 +0100233 __u32 version; /* version number of this structure */
234 __u32 compat_version; /* lowest version this is compat with */
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200235
236 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200237 * Bits needed to read the hw events in user-space.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200238 *
Peter Zijlstra92f22a32009-04-02 11:12:04 +0200239 * u32 seq;
240 * s64 count;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200241 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200242 * do {
243 * seq = pc->lock;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200244 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200245 * barrier()
246 * if (pc->index) {
247 * count = pmc_read(pc->index - 1);
248 * count += pc->offset;
249 * } else
250 * goto regular_read;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200251 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200252 * barrier();
253 * } while (pc->lock != seq);
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200254 *
Peter Zijlstra92f22a32009-04-02 11:12:04 +0200255 * NOTE: for obvious reason this only works on self-monitoring
256 * processes.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200257 */
Paul Mackerras37d81822009-03-23 18:22:08 +0100258 __u32 lock; /* seqlock for synchronization */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200259 __u32 index; /* hardware event identifier */
260 __s64 offset; /* add to hardware event value */
261 __u64 time_enabled; /* time event active */
262 __u64 time_running; /* time event on cpu */
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100263
Peter Zijlstra41f95332009-06-23 17:55:18 +0200264 /*
265 * Hole for extension of the self monitor capabilities
266 */
267
Peter Zijlstra7f8b4e42009-06-22 14:34:35 +0200268 __u64 __reserved[123]; /* align to 1k */
Peter Zijlstra41f95332009-06-23 17:55:18 +0200269
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200270 /*
271 * Control data for the mmap() data buffer.
272 *
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100273 * User-space reading the @data_head value should issue an rmb(), on
274 * SMP capable platforms, after reading this value -- see
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200275 * perf_event_wakeup().
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100276 *
277 * When the mapping is PROT_WRITE the @data_tail value should be
278 * written by userspace to reflect the last read data. In this case
279 * the kernel will not over-write unread data.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200280 */
Peter Zijlstra8e3747c2009-06-02 16:16:02 +0200281 __u64 data_head; /* head in the data section */
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100282 __u64 data_tail; /* user-space written tail */
Paul Mackerras37d81822009-03-23 18:22:08 +0100283};
284
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200285#define PERF_RECORD_MISC_CPUMODE_MASK (3 << 0)
286#define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
287#define PERF_RECORD_MISC_KERNEL (1 << 0)
288#define PERF_RECORD_MISC_USER (2 << 0)
289#define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
Peter Zijlstra6fab0192009-04-08 15:01:26 +0200290
Peter Zijlstra5c148192009-03-25 12:30:23 +0100291struct perf_event_header {
292 __u32 type;
Peter Zijlstra6fab0192009-04-08 15:01:26 +0200293 __u16 misc;
294 __u16 size;
Peter Zijlstra5c148192009-03-25 12:30:23 +0100295};
296
297enum perf_event_type {
Peter Zijlstra5ed00412009-03-30 19:07:12 +0200298
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200299 /*
300 * The MMAP events record the PROT_EXEC mappings so that we can
301 * correlate userspace IPs to code. They have the following structure:
302 *
303 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200304 * struct perf_event_header header;
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200305 *
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200306 * u32 pid, tid;
307 * u64 addr;
308 * u64 len;
309 * u64 pgoff;
310 * char filename[];
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200311 * };
312 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200313 PERF_RECORD_MMAP = 1,
Peter Zijlstraea5d20c2009-03-25 12:30:25 +0100314
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200315 /*
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200316 * struct {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200317 * struct perf_event_header header;
318 * u64 id;
319 * u64 lost;
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100320 * };
321 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200322 PERF_RECORD_LOST = 2,
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100323
324 /*
325 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200326 * struct perf_event_header header;
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200327 *
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200328 * u32 pid, tid;
329 * char comm[];
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200330 * };
331 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200332 PERF_RECORD_COMM = 3,
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200333
334 /*
Peter Zijlstra26b119b2009-05-20 12:21:20 +0200335 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200336 * struct perf_event_header header;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200337 * u32 pid, ppid;
338 * u32 tid, ptid;
Arjan van de Ven393b2ad2009-09-12 07:52:47 +0200339 * u64 time;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200340 * };
341 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200342 PERF_RECORD_EXIT = 4,
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200343
344 /*
345 * struct {
346 * struct perf_event_header header;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200347 * u64 time;
Peter Zijlstra689802b2009-06-05 15:05:43 +0200348 * u64 id;
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200349 * u64 stream_id;
Peter Zijlstraa78ac322009-05-25 17:39:05 +0200350 * };
351 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200352 PERF_RECORD_THROTTLE = 5,
353 PERF_RECORD_UNTHROTTLE = 6,
Peter Zijlstraa78ac322009-05-25 17:39:05 +0200354
355 /*
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200356 * struct {
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200357 * struct perf_event_header header;
358 * u32 pid, ppid;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200359 * u32 tid, ptid;
Anton Blancharda6f10a22009-09-22 22:34:24 +1000360 * u64 time;
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200361 * };
362 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200363 PERF_RECORD_FORK = 7,
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200364
365 /*
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200366 * struct {
367 * struct perf_event_header header;
368 * u32 pid, tid;
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200369 *
370 * struct read_format values;
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200371 * };
372 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200373 PERF_RECORD_READ = 8,
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200374
375 /*
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200376 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200377 * struct perf_event_header header;
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200378 *
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100379 * { u64 ip; } && PERF_SAMPLE_IP
380 * { u32 pid, tid; } && PERF_SAMPLE_TID
381 * { u64 time; } && PERF_SAMPLE_TIME
382 * { u64 addr; } && PERF_SAMPLE_ADDR
Peter Zijlstrae6e18ec2009-06-25 11:27:12 +0200383 * { u64 id; } && PERF_SAMPLE_ID
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200384 * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100385 * { u32 cpu, res; } && PERF_SAMPLE_CPU
Ingo Molnar57c0c152009-09-21 12:20:38 +0200386 * { u64 period; } && PERF_SAMPLE_PERIOD
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200387 *
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200388 * { struct read_format values; } && PERF_SAMPLE_READ
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200389 *
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200390 * { u64 nr,
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100391 * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200392 *
Ingo Molnar57c0c152009-09-21 12:20:38 +0200393 * #
394 * # The RAW record below is opaque data wrt the ABI
395 * #
396 * # That is, the ABI doesn't make any promises wrt to
397 * # the stability of its content, it may vary depending
398 * # on event, hardware, kernel version and phase of
399 * # the moon.
400 * #
401 * # In other words, PERF_SAMPLE_RAW contents are not an ABI.
402 * #
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200403 *
Peter Zijlstraa0445602009-08-10 11:16:52 +0200404 * { u32 size;
405 * char data[size];}&& PERF_SAMPLE_RAW
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200406 * };
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200407 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200408 PERF_RECORD_SAMPLE = 9,
Peter Zijlstrae6e18ec2009-06-25 11:27:12 +0200409
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200410 PERF_RECORD_MAX, /* non-ABI */
Peter Zijlstra5c148192009-03-25 12:30:23 +0100411};
412
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200413enum perf_callchain_context {
414 PERF_CONTEXT_HV = (__u64)-32,
415 PERF_CONTEXT_KERNEL = (__u64)-128,
416 PERF_CONTEXT_USER = (__u64)-512,
Ingo Molnar75220602009-06-18 08:00:17 +0200417
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200418 PERF_CONTEXT_GUEST = (__u64)-2048,
419 PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176,
420 PERF_CONTEXT_GUEST_USER = (__u64)-2560,
421
422 PERF_CONTEXT_MAX = (__u64)-4095,
Ingo Molnar75220602009-06-18 08:00:17 +0200423};
424
Peter Zijlstraa4be7c22009-08-19 11:18:27 +0200425#define PERF_FLAG_FD_NO_GROUP (1U << 0)
426#define PERF_FLAG_FD_OUTPUT (1U << 1)
427
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100428#ifdef __KERNEL__
Paul Mackerrasd859e292009-01-17 18:10:22 +1100429/*
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100430 * Kernel-internal data types and definitions:
Ingo Molnar9f66a382008-12-10 12:33:23 +0100431 */
432
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200433#ifdef CONFIG_PERF_EVENTS
434# include <asm/perf_event.h>
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100435#endif
436
437#include <linux/list.h>
438#include <linux/mutex.h>
439#include <linux/rculist.h>
440#include <linux/rcupdate.h>
441#include <linux/spinlock.h>
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100442#include <linux/hrtimer.h>
Peter Zijlstra3c446b3d2009-04-06 11:45:01 +0200443#include <linux/fs.h>
Peter Zijlstra709e50c2009-06-02 14:13:15 +0200444#include <linux/pid_namespace.h>
Peter Zijlstra906010b2009-09-21 16:08:49 +0200445#include <linux/workqueue.h>
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100446#include <asm/atomic.h>
447
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200448#define PERF_MAX_STACK_DEPTH 255
449
450struct perf_callchain_entry {
451 __u64 nr;
452 __u64 ip[PERF_MAX_STACK_DEPTH];
453};
454
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200455struct perf_raw_record {
456 u32 size;
457 void *data;
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200458};
459
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100460struct task_struct;
461
Thomas Gleixner0793a612008-12-04 20:12:29 +0100462/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200463 * struct hw_perf_event - performance event hardware details:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100464 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200465struct hw_perf_event {
466#ifdef CONFIG_PERF_EVENTS
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100467 union {
468 struct { /* hardware */
Ingo Molnara3084442009-06-11 14:44:26 +0200469 u64 config;
470 unsigned long config_base;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200471 unsigned long event_base;
Ingo Molnara3084442009-06-11 14:44:26 +0200472 int idx;
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100473 };
Soeren Sandmann721a6692009-09-15 14:33:08 +0200474 struct { /* software */
475 s64 remaining;
Ingo Molnara3084442009-06-11 14:44:26 +0200476 struct hrtimer hrtimer;
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100477 };
478 };
Ingo Molnaree060942008-12-13 09:00:03 +0100479 atomic64_t prev_count;
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200480 u64 sample_period;
Peter Zijlstra9e350de2009-06-10 21:34:59 +0200481 u64 last_period;
Ingo Molnaree060942008-12-13 09:00:03 +0100482 atomic64_t period_left;
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200483 u64 interrupts;
Peter Zijlstra6a24ed6c2009-06-05 18:01:29 +0200484
485 u64 freq_count;
486 u64 freq_interrupts;
Peter Zijlstrabd2b5b12009-06-10 13:40:57 +0200487 u64 freq_stamp;
Ingo Molnaree060942008-12-13 09:00:03 +0100488#endif
Thomas Gleixner0793a612008-12-04 20:12:29 +0100489};
490
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200491struct perf_event;
Ingo Molnar621a01e2008-12-11 12:46:46 +0100492
493/**
Robert Richter4aeb0b42009-04-29 12:47:03 +0200494 * struct pmu - generic performance monitoring unit
Ingo Molnar621a01e2008-12-11 12:46:46 +0100495 */
Robert Richter4aeb0b42009-04-29 12:47:03 +0200496struct pmu {
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200497 int (*enable) (struct perf_event *event);
498 void (*disable) (struct perf_event *event);
499 void (*read) (struct perf_event *event);
500 void (*unthrottle) (struct perf_event *event);
Ingo Molnar621a01e2008-12-11 12:46:46 +0100501};
502
Thomas Gleixner0793a612008-12-04 20:12:29 +0100503/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200504 * enum perf_event_active_state - the states of a event
Ingo Molnar6a930702008-12-11 15:17:03 +0100505 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200506enum perf_event_active_state {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200507 PERF_EVENT_STATE_ERROR = -2,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200508 PERF_EVENT_STATE_OFF = -1,
509 PERF_EVENT_STATE_INACTIVE = 0,
Ingo Molnar57c0c152009-09-21 12:20:38 +0200510 PERF_EVENT_STATE_ACTIVE = 1,
Ingo Molnar6a930702008-12-11 15:17:03 +0100511};
512
Ingo Molnar9b51f662008-12-12 13:49:45 +0100513struct file;
514
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100515struct perf_mmap_data {
516 struct rcu_head rcu_head;
Peter Zijlstra906010b2009-09-21 16:08:49 +0200517#ifdef CONFIG_PERF_USE_VMALLOC
518 struct work_struct work;
519#endif
520 int data_order;
Peter Zijlstra8740f942009-04-08 15:01:29 +0200521 int nr_pages; /* nr of data pages */
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100522 int writable; /* are we writable */
Peter Zijlstrac5078f72009-05-05 17:50:24 +0200523 int nr_locked; /* nr pages mlocked */
Peter Zijlstra8740f942009-04-08 15:01:29 +0200524
Peter Zijlstrac33a0bc2009-05-01 12:23:16 +0200525 atomic_t poll; /* POLL_ for wakeups */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200526 atomic_t events; /* event_id limit */
Peter Zijlstra8740f942009-04-08 15:01:29 +0200527
Peter Zijlstra8e3747c2009-06-02 16:16:02 +0200528 atomic_long_t head; /* write position */
529 atomic_long_t done_head; /* completed head */
530
Peter Zijlstrac33a0bc2009-05-01 12:23:16 +0200531 atomic_t lock; /* concurrent writes */
Peter Zijlstrac66de4a52009-05-05 17:50:22 +0200532 atomic_t wakeup; /* needs a wakeup */
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100533 atomic_t lost; /* nr records lost */
Peter Zijlstrac66de4a52009-05-05 17:50:22 +0200534
Peter Zijlstra2667de82009-09-17 19:01:10 +0200535 long watermark; /* wakeup watermark */
536
Ingo Molnar57c0c152009-09-21 12:20:38 +0200537 struct perf_event_mmap_page *user_page;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200538 void *data_pages[0];
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100539};
540
Peter Zijlstra671dec52009-04-06 11:45:02 +0200541struct perf_pending_entry {
542 struct perf_pending_entry *next;
543 void (*func)(struct perf_pending_entry *);
Peter Zijlstra925d5192009-03-30 19:07:02 +0200544};
545
Ingo Molnar6a930702008-12-11 15:17:03 +0100546/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200547 * struct perf_event - performance event kernel representation:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100548 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200549struct perf_event {
550#ifdef CONFIG_PERF_EVENTS
Ingo Molnar65abc862009-09-21 10:18:27 +0200551 struct list_head group_entry;
Peter Zijlstra592903c2009-03-13 12:21:36 +0100552 struct list_head event_entry;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100553 struct list_head sibling_list;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200554 int nr_siblings;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200555 struct perf_event *group_leader;
556 struct perf_event *output;
Robert Richter4aeb0b42009-04-29 12:47:03 +0200557 const struct pmu *pmu;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100558
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200559 enum perf_event_active_state state;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100560 atomic64_t count;
Ingo Molnaree060942008-12-13 09:00:03 +0100561
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100562 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200563 * These are the total time in nanoseconds that the event
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100564 * has been enabled (i.e. eligible to run, and the task has
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200565 * been scheduled in, if this is a per-task event)
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100566 * and running (scheduled onto the CPU), respectively.
567 *
568 * They are computed from tstamp_enabled, tstamp_running and
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200569 * tstamp_stopped when the event is in INACTIVE or ACTIVE state.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100570 */
571 u64 total_time_enabled;
572 u64 total_time_running;
573
574 /*
575 * These are timestamps used for computing total_time_enabled
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200576 * and total_time_running when the event is in INACTIVE or
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100577 * ACTIVE state, measured in nanoseconds from an arbitrary point
578 * in time.
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200579 * tstamp_enabled: the notional time when the event was enabled
580 * tstamp_running: the notional time when the event was scheduled on
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100581 * tstamp_stopped: in INACTIVE state, the notional time when the
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200582 * event was scheduled off.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100583 */
584 u64 tstamp_enabled;
585 u64 tstamp_running;
586 u64 tstamp_stopped;
587
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200588 struct perf_event_attr attr;
589 struct hw_perf_event hw;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100590
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200591 struct perf_event_context *ctx;
Ingo Molnar9b51f662008-12-12 13:49:45 +0100592 struct file *filp;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100593
594 /*
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100595 * These accumulate total time (in nanoseconds) that children
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200596 * events have been enabled and running, respectively.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100597 */
598 atomic64_t child_total_time_enabled;
599 atomic64_t child_total_time_running;
600
601 /*
Paul Mackerrasd859e292009-01-17 18:10:22 +1100602 * Protect attach/detach and child_list:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100603 */
Peter Zijlstrafccc7142009-05-23 18:28:56 +0200604 struct mutex child_mutex;
605 struct list_head child_list;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200606 struct perf_event *parent;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100607
608 int oncpu;
609 int cpu;
610
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200611 struct list_head owner_entry;
612 struct task_struct *owner;
613
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100614 /* mmap bits */
615 struct mutex mmap_mutex;
616 atomic_t mmap_count;
617 struct perf_mmap_data *data;
Paul Mackerras37d81822009-03-23 18:22:08 +0100618
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100619 /* poll related */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100620 wait_queue_head_t waitq;
Peter Zijlstra3c446b3d2009-04-06 11:45:01 +0200621 struct fasync_struct *fasync;
Peter Zijlstra79f14642009-04-06 11:45:07 +0200622
623 /* delayed work for NMIs and such */
624 int pending_wakeup;
Peter Zijlstra4c9e2542009-04-06 11:45:09 +0200625 int pending_kill;
Peter Zijlstra79f14642009-04-06 11:45:07 +0200626 int pending_disable;
Peter Zijlstra671dec52009-04-06 11:45:02 +0200627 struct perf_pending_entry pending;
Peter Zijlstra592903c2009-03-13 12:21:36 +0100628
Peter Zijlstra79f14642009-04-06 11:45:07 +0200629 atomic_t event_limit;
630
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200631 void (*destroy)(struct perf_event *);
Peter Zijlstra592903c2009-03-13 12:21:36 +0100632 struct rcu_head rcu_head;
Peter Zijlstra709e50c2009-06-02 14:13:15 +0200633
634 struct pid_namespace *ns;
Peter Zijlstra8e5799b2009-06-02 15:08:15 +0200635 u64 id;
Ingo Molnaree060942008-12-13 09:00:03 +0100636#endif
Thomas Gleixner0793a612008-12-04 20:12:29 +0100637};
638
639/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200640 * struct perf_event_context - event context structure
Thomas Gleixner0793a612008-12-04 20:12:29 +0100641 *
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200642 * Used as a container for task events and CPU events as well:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100643 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200644struct perf_event_context {
Thomas Gleixner0793a612008-12-04 20:12:29 +0100645 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200646 * Protect the states of the events in the list,
Paul Mackerrasd859e292009-01-17 18:10:22 +1100647 * nr_active, and the list:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100648 */
Ingo Molnara3084442009-06-11 14:44:26 +0200649 spinlock_t lock;
Paul Mackerrasd859e292009-01-17 18:10:22 +1100650 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200651 * Protect the list of events. Locking either mutex or lock
Paul Mackerrasd859e292009-01-17 18:10:22 +1100652 * is sufficient to ensure the list doesn't change; to change
653 * the list you need to lock both the mutex and the spinlock.
654 */
Ingo Molnara3084442009-06-11 14:44:26 +0200655 struct mutex mutex;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100656
Ingo Molnar65abc862009-09-21 10:18:27 +0200657 struct list_head group_list;
Ingo Molnara3084442009-06-11 14:44:26 +0200658 struct list_head event_list;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200659 int nr_events;
Ingo Molnara3084442009-06-11 14:44:26 +0200660 int nr_active;
661 int is_active;
Peter Zijlstrabfbd3382009-06-24 21:11:59 +0200662 int nr_stat;
Ingo Molnara3084442009-06-11 14:44:26 +0200663 atomic_t refcount;
664 struct task_struct *task;
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100665
666 /*
Peter Zijlstra4af49982009-04-06 11:45:10 +0200667 * Context clock, runs when context enabled.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100668 */
Ingo Molnara3084442009-06-11 14:44:26 +0200669 u64 time;
670 u64 timestamp;
Paul Mackerras564c2b22009-05-22 14:27:22 +1000671
672 /*
673 * These fields let us detect when two contexts have both
674 * been cloned (inherited) from a common ancestor.
675 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200676 struct perf_event_context *parent_ctx;
Ingo Molnara3084442009-06-11 14:44:26 +0200677 u64 parent_gen;
678 u64 generation;
679 int pin_count;
680 struct rcu_head rcu_head;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100681};
682
683/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200684 * struct perf_event_cpu_context - per cpu event context structure
Thomas Gleixner0793a612008-12-04 20:12:29 +0100685 */
686struct perf_cpu_context {
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200687 struct perf_event_context ctx;
688 struct perf_event_context *task_ctx;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100689 int active_oncpu;
690 int max_pertask;
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100691 int exclusive;
Peter Zijlstra96f6d442009-03-23 18:22:07 +0100692
693 /*
694 * Recursion avoidance:
695 *
696 * task, softirq, irq, nmi context
697 */
Ingo Molnar22a4f652009-06-01 10:13:37 +0200698 int recursion[4];
Thomas Gleixner0793a612008-12-04 20:12:29 +0100699};
700
Markus Metzger5622f292009-09-15 13:00:23 +0200701struct perf_output_handle {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200702 struct perf_event *event;
703 struct perf_mmap_data *data;
704 unsigned long head;
705 unsigned long offset;
706 int nmi;
707 int sample;
708 int locked;
709 unsigned long flags;
Markus Metzger5622f292009-09-15 13:00:23 +0200710};
711
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200712#ifdef CONFIG_PERF_EVENTS
Robert Richter829b42d2009-04-29 12:46:59 +0200713
Thomas Gleixner0793a612008-12-04 20:12:29 +0100714/*
715 * Set by architecture code:
716 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200717extern int perf_max_events;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100718
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200719extern const struct pmu *hw_perf_event_init(struct perf_event *event);
Ingo Molnar621a01e2008-12-11 12:46:46 +0100720
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200721extern void perf_event_task_sched_in(struct task_struct *task, int cpu);
722extern void perf_event_task_sched_out(struct task_struct *task,
Paul Mackerras564c2b22009-05-22 14:27:22 +1000723 struct task_struct *next, int cpu);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200724extern void perf_event_task_tick(struct task_struct *task, int cpu);
725extern int perf_event_init_task(struct task_struct *child);
726extern void perf_event_exit_task(struct task_struct *child);
727extern void perf_event_free_task(struct task_struct *task);
728extern void set_perf_event_pending(void);
729extern void perf_event_do_pending(void);
730extern void perf_event_print_debug(void);
Peter Zijlstra9e35ad32009-05-13 16:21:38 +0200731extern void __perf_disable(void);
732extern bool __perf_enable(void);
733extern void perf_disable(void);
734extern void perf_enable(void);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200735extern int perf_event_task_disable(void);
736extern int perf_event_task_enable(void);
737extern int hw_perf_group_sched_in(struct perf_event *group_leader,
Paul Mackerras3cbed422009-01-09 16:43:42 +1100738 struct perf_cpu_context *cpuctx,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200739 struct perf_event_context *ctx, int cpu);
740extern void perf_event_update_userpage(struct perf_event *event);
Ingo Molnar5c92d122008-12-11 13:21:10 +0100741
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200742struct perf_sample_data {
Markus Metzger5622f292009-09-15 13:00:23 +0200743 u64 type;
744
745 u64 ip;
746 struct {
747 u32 pid;
748 u32 tid;
749 } tid_entry;
750 u64 time;
Ingo Molnara3084442009-06-11 14:44:26 +0200751 u64 addr;
Markus Metzger5622f292009-09-15 13:00:23 +0200752 u64 id;
753 u64 stream_id;
754 struct {
755 u32 cpu;
756 u32 reserved;
757 } cpu_entry;
Ingo Molnara3084442009-06-11 14:44:26 +0200758 u64 period;
Markus Metzger5622f292009-09-15 13:00:23 +0200759 struct perf_callchain_entry *callchain;
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200760 struct perf_raw_record *raw;
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200761};
762
Markus Metzger5622f292009-09-15 13:00:23 +0200763extern void perf_output_sample(struct perf_output_handle *handle,
764 struct perf_event_header *header,
765 struct perf_sample_data *data,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200766 struct perf_event *event);
Markus Metzger5622f292009-09-15 13:00:23 +0200767extern void perf_prepare_sample(struct perf_event_header *header,
768 struct perf_sample_data *data,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200769 struct perf_event *event,
Markus Metzger5622f292009-09-15 13:00:23 +0200770 struct pt_regs *regs);
771
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200772extern int perf_event_overflow(struct perf_event *event, int nmi,
Markus Metzger5622f292009-09-15 13:00:23 +0200773 struct perf_sample_data *data,
774 struct pt_regs *regs);
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200775
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100776/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200777 * Return 1 for a software event, 0 for a hardware event
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100778 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200779static inline int is_software_event(struct perf_event *event)
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100780{
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200781 return (event->attr.type != PERF_TYPE_RAW) &&
782 (event->attr.type != PERF_TYPE_HARDWARE) &&
783 (event->attr.type != PERF_TYPE_HW_CACHE);
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100784}
785
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200786extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200787
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200788extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200789
790static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200791perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200792{
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200793 if (atomic_read(&perf_swevent_enabled[event_id]))
794 __perf_sw_event(event_id, nr, nmi, regs, addr);
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200795}
Peter Zijlstra15dbf272009-03-13 12:21:32 +0100796
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200797extern void __perf_event_mmap(struct vm_area_struct *vma);
Peter Zijlstra089dd792009-06-05 14:04:55 +0200798
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200799static inline void perf_event_mmap(struct vm_area_struct *vma)
Peter Zijlstra089dd792009-06-05 14:04:55 +0200800{
801 if (vma->vm_flags & VM_EXEC)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200802 __perf_event_mmap(vma);
Peter Zijlstra089dd792009-06-05 14:04:55 +0200803}
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200804
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200805extern void perf_event_comm(struct task_struct *tsk);
806extern void perf_event_fork(struct task_struct *tsk);
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200807
Peter Zijlstra394ee072009-03-30 19:07:14 +0200808extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
809
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200810extern int sysctl_perf_event_paranoid;
811extern int sysctl_perf_event_mlock;
812extern int sysctl_perf_event_sample_rate;
Peter Zijlstra1ccd1542009-04-09 10:53:45 +0200813
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200814extern void perf_event_init(void);
815extern void perf_tp_event(int event_id, u64 addr, u64 count,
Jason Baronf4b5ffc2009-08-10 16:53:02 -0400816 void *record, int entry_size);
Ingo Molnar0d905bc2009-05-04 19:13:30 +0200817
Paul Mackerras9d23a902009-05-14 21:48:08 +1000818#ifndef perf_misc_flags
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200819#define perf_misc_flags(regs) (user_mode(regs) ? PERF_RECORD_MISC_USER : \
820 PERF_RECORD_MISC_KERNEL)
Paul Mackerras9d23a902009-05-14 21:48:08 +1000821#define perf_instruction_pointer(regs) instruction_pointer(regs)
822#endif
823
Markus Metzger5622f292009-09-15 13:00:23 +0200824extern int perf_output_begin(struct perf_output_handle *handle,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200825 struct perf_event *event, unsigned int size,
Markus Metzger5622f292009-09-15 13:00:23 +0200826 int nmi, int sample);
827extern void perf_output_end(struct perf_output_handle *handle);
828extern void perf_output_copy(struct perf_output_handle *handle,
829 const void *buf, unsigned int len);
Thomas Gleixner0793a612008-12-04 20:12:29 +0100830#else
831static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200832perf_event_task_sched_in(struct task_struct *task, int cpu) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +0100833static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200834perf_event_task_sched_out(struct task_struct *task,
Ingo Molnar910431c2009-05-22 12:32:15 +0200835 struct task_struct *next, int cpu) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +0100836static inline void
Ingo Molnar57c0c152009-09-21 12:20:38 +0200837perf_event_task_tick(struct task_struct *task, int cpu) { }
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200838static inline int perf_event_init_task(struct task_struct *child) { return 0; }
839static inline void perf_event_exit_task(struct task_struct *child) { }
840static inline void perf_event_free_task(struct task_struct *task) { }
Ingo Molnar57c0c152009-09-21 12:20:38 +0200841static inline void perf_event_do_pending(void) { }
842static inline void perf_event_print_debug(void) { }
Peter Zijlstra9e35ad32009-05-13 16:21:38 +0200843static inline void perf_disable(void) { }
844static inline void perf_enable(void) { }
Ingo Molnar57c0c152009-09-21 12:20:38 +0200845static inline int perf_event_task_disable(void) { return -EINVAL; }
846static inline int perf_event_task_enable(void) { return -EINVAL; }
Peter Zijlstra15dbf272009-03-13 12:21:32 +0100847
Peter Zijlstra925d5192009-03-30 19:07:02 +0200848static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200849perf_sw_event(u32 event_id, u64 nr, int nmi,
Peter Zijlstra78f13e92009-04-08 15:01:33 +0200850 struct pt_regs *regs, u64 addr) { }
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200851
Ingo Molnar57c0c152009-09-21 12:20:38 +0200852static inline void perf_event_mmap(struct vm_area_struct *vma) { }
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200853static inline void perf_event_comm(struct task_struct *tsk) { }
854static inline void perf_event_fork(struct task_struct *tsk) { }
855static inline void perf_event_init(void) { }
Markus Metzger5622f292009-09-15 13:00:23 +0200856
Thomas Gleixner0793a612008-12-04 20:12:29 +0100857#endif
858
Markus Metzger5622f292009-09-15 13:00:23 +0200859#define perf_output_put(handle, x) \
860 perf_output_copy((handle), &(x), sizeof(x))
861
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100862#endif /* __KERNEL__ */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200863#endif /* _LINUX_PERF_EVENT_H */