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Commit | Line | Data |
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0793a61d TG |
1 | /* |
2 | * Performance counters: | |
3 | * | |
a308444c IM |
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 | |
0793a61d TG |
7 | * |
8 | * Data type definitions, declarations, prototypes. | |
9 | * | |
a308444c | 10 | * Started by: Thomas Gleixner and Ingo Molnar |
0793a61d TG |
11 | * |
12 | * For licencing details see kernel-base/COPYING | |
13 | */ | |
14 | #ifndef _LINUX_PERF_COUNTER_H | |
15 | #define _LINUX_PERF_COUNTER_H | |
16 | ||
f3dfd265 PM |
17 | #include <linux/types.h> |
18 | #include <linux/ioctl.h> | |
9aaa131a | 19 | #include <asm/byteorder.h> |
0793a61d TG |
20 | |
21 | /* | |
9f66a381 IM |
22 | * User-space ABI bits: |
23 | */ | |
24 | ||
25 | /* | |
0d48696f | 26 | * attr.type |
0793a61d | 27 | */ |
1c432d89 | 28 | enum perf_type_id { |
a308444c IM |
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, | |
b8e83514 | 34 | |
a308444c | 35 | PERF_TYPE_MAX, /* non-ABI */ |
b8e83514 | 36 | }; |
6c594c21 | 37 | |
b8e83514 | 38 | /* |
a308444c IM |
39 | * Generalized performance counter event types, used by the |
40 | * attr.event_id parameter of the sys_perf_counter_open() | |
41 | * syscall: | |
b8e83514 | 42 | */ |
1c432d89 | 43 | enum perf_hw_id { |
9f66a381 | 44 | /* |
b8e83514 | 45 | * Common hardware events, generalized by the kernel: |
9f66a381 | 46 | */ |
f4dbfa8f PZ |
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, | |
54 | ||
a308444c | 55 | PERF_COUNT_HW_MAX, /* non-ABI */ |
b8e83514 | 56 | }; |
e077df4f | 57 | |
8326f44d IM |
58 | /* |
59 | * Generalized hardware cache counters: | |
60 | * | |
8be6e8f3 | 61 | * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x |
8326f44d IM |
62 | * { read, write, prefetch } x |
63 | * { accesses, misses } | |
64 | */ | |
1c432d89 | 65 | enum perf_hw_cache_id { |
a308444c IM |
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, | |
72 | ||
73 | PERF_COUNT_HW_CACHE_MAX, /* non-ABI */ | |
8326f44d IM |
74 | }; |
75 | ||
1c432d89 | 76 | enum perf_hw_cache_op_id { |
a308444c IM |
77 | PERF_COUNT_HW_CACHE_OP_READ = 0, |
78 | PERF_COUNT_HW_CACHE_OP_WRITE = 1, | |
79 | PERF_COUNT_HW_CACHE_OP_PREFETCH = 2, | |
8326f44d | 80 | |
a308444c | 81 | PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */ |
8326f44d IM |
82 | }; |
83 | ||
1c432d89 PZ |
84 | enum perf_hw_cache_op_result_id { |
85 | PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0, | |
86 | PERF_COUNT_HW_CACHE_RESULT_MISS = 1, | |
8326f44d | 87 | |
a308444c | 88 | PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */ |
8326f44d IM |
89 | }; |
90 | ||
b8e83514 PZ |
91 | /* |
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 | */ | |
1c432d89 | 97 | enum perf_sw_ids { |
a308444c IM |
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, | |
105 | ||
106 | PERF_COUNT_SW_MAX, /* non-ABI */ | |
0793a61d TG |
107 | }; |
108 | ||
8a057d84 | 109 | /* |
0d48696f | 110 | * Bits that can be set in attr.sample_type to request information |
8a057d84 PZ |
111 | * in the overflow packets. |
112 | */ | |
b23f3325 | 113 | enum perf_counter_sample_format { |
a308444c IM |
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, | |
974802ea PZ |
123 | |
124 | PERF_SAMPLE_MAX = 1U << 9, /* non-ABI */ | |
8a057d84 PZ |
125 | }; |
126 | ||
53cfbf59 | 127 | /* |
0d48696f | 128 | * Bits that can be set in attr.read_format to request that |
53cfbf59 PM |
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 { | |
a308444c IM |
133 | PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0, |
134 | PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1, | |
135 | PERF_FORMAT_ID = 1U << 2, | |
974802ea PZ |
136 | |
137 | PERF_FORMAT_MAX = 1U << 3, /* non-ABI */ | |
53cfbf59 PM |
138 | }; |
139 | ||
974802ea PZ |
140 | #define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */ |
141 | ||
9f66a381 IM |
142 | /* |
143 | * Hardware event to monitor via a performance monitoring counter: | |
144 | */ | |
0d48696f | 145 | struct perf_counter_attr { |
974802ea | 146 | |
f4a2deb4 | 147 | /* |
a21ca2ca IM |
148 | * Major type: hardware/software/tracepoint/etc. |
149 | */ | |
150 | __u32 type; | |
974802ea PZ |
151 | |
152 | /* | |
153 | * Size of the attr structure, for fwd/bwd compat. | |
154 | */ | |
155 | __u32 size; | |
a21ca2ca IM |
156 | |
157 | /* | |
158 | * Type specific configuration information. | |
f4a2deb4 PZ |
159 | */ |
160 | __u64 config; | |
9f66a381 | 161 | |
60db5e09 | 162 | union { |
b23f3325 PZ |
163 | __u64 sample_period; |
164 | __u64 sample_freq; | |
60db5e09 PZ |
165 | }; |
166 | ||
b23f3325 PZ |
167 | __u64 sample_type; |
168 | __u64 read_format; | |
9f66a381 | 169 | |
2743a5b0 | 170 | __u64 disabled : 1, /* off by default */ |
0475f9ea PM |
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 */ | |
2743a5b0 | 177 | exclude_idle : 1, /* don't count when idle */ |
0a4a9391 | 178 | mmap : 1, /* include mmap data */ |
8d1b2d93 | 179 | comm : 1, /* include comm data */ |
60db5e09 | 180 | freq : 1, /* use freq, not period */ |
0475f9ea | 181 | |
974802ea | 182 | __reserved_1 : 53; |
2743a5b0 | 183 | |
c457810a | 184 | __u32 wakeup_events; /* wakeup every n events */ |
974802ea | 185 | __u32 __reserved_2; |
9f66a381 | 186 | |
974802ea | 187 | __u64 __reserved_3; |
eab656ae TG |
188 | }; |
189 | ||
d859e29f PM |
190 | /* |
191 | * Ioctls that can be done on a perf counter fd: | |
192 | */ | |
08247e31 PZ |
193 | #define PERF_COUNTER_IOC_ENABLE _IO ('$', 0) |
194 | #define PERF_COUNTER_IOC_DISABLE _IO ('$', 1) | |
195 | #define PERF_COUNTER_IOC_REFRESH _IO ('$', 2) | |
196 | #define PERF_COUNTER_IOC_RESET _IO ('$', 3) | |
197 | #define PERF_COUNTER_IOC_PERIOD _IOW('$', 4, u64) | |
3df5edad PZ |
198 | |
199 | enum perf_counter_ioc_flags { | |
200 | PERF_IOC_FLAG_GROUP = 1U << 0, | |
201 | }; | |
d859e29f | 202 | |
37d81828 PM |
203 | /* |
204 | * Structure of the page that can be mapped via mmap | |
205 | */ | |
206 | struct perf_counter_mmap_page { | |
207 | __u32 version; /* version number of this structure */ | |
208 | __u32 compat_version; /* lowest version this is compat with */ | |
38ff667b PZ |
209 | |
210 | /* | |
211 | * Bits needed to read the hw counters in user-space. | |
212 | * | |
92f22a38 PZ |
213 | * u32 seq; |
214 | * s64 count; | |
38ff667b | 215 | * |
a2e87d06 PZ |
216 | * do { |
217 | * seq = pc->lock; | |
38ff667b | 218 | * |
a2e87d06 PZ |
219 | * barrier() |
220 | * if (pc->index) { | |
221 | * count = pmc_read(pc->index - 1); | |
222 | * count += pc->offset; | |
223 | * } else | |
224 | * goto regular_read; | |
38ff667b | 225 | * |
a2e87d06 PZ |
226 | * barrier(); |
227 | * } while (pc->lock != seq); | |
38ff667b | 228 | * |
92f22a38 PZ |
229 | * NOTE: for obvious reason this only works on self-monitoring |
230 | * processes. | |
38ff667b | 231 | */ |
37d81828 PM |
232 | __u32 lock; /* seqlock for synchronization */ |
233 | __u32 index; /* hardware counter identifier */ | |
234 | __s64 offset; /* add to hardware counter value */ | |
7f8b4e4e PZ |
235 | __u64 time_enabled; /* time counter active */ |
236 | __u64 time_running; /* time counter on cpu */ | |
7b732a75 | 237 | |
41f95331 PZ |
238 | /* |
239 | * Hole for extension of the self monitor capabilities | |
240 | */ | |
241 | ||
7f8b4e4e | 242 | __u64 __reserved[123]; /* align to 1k */ |
41f95331 | 243 | |
38ff667b PZ |
244 | /* |
245 | * Control data for the mmap() data buffer. | |
246 | * | |
43a21ea8 PZ |
247 | * User-space reading the @data_head value should issue an rmb(), on |
248 | * SMP capable platforms, after reading this value -- see | |
249 | * perf_counter_wakeup(). | |
250 | * | |
251 | * When the mapping is PROT_WRITE the @data_tail value should be | |
252 | * written by userspace to reflect the last read data. In this case | |
253 | * the kernel will not over-write unread data. | |
38ff667b | 254 | */ |
8e3747c1 | 255 | __u64 data_head; /* head in the data section */ |
43a21ea8 | 256 | __u64 data_tail; /* user-space written tail */ |
37d81828 PM |
257 | }; |
258 | ||
a308444c IM |
259 | #define PERF_EVENT_MISC_CPUMODE_MASK (3 << 0) |
260 | #define PERF_EVENT_MISC_CPUMODE_UNKNOWN (0 << 0) | |
261 | #define PERF_EVENT_MISC_KERNEL (1 << 0) | |
262 | #define PERF_EVENT_MISC_USER (2 << 0) | |
263 | #define PERF_EVENT_MISC_HYPERVISOR (3 << 0) | |
264 | #define PERF_EVENT_MISC_OVERFLOW (1 << 2) | |
6fab0192 | 265 | |
5c148194 PZ |
266 | struct perf_event_header { |
267 | __u32 type; | |
6fab0192 PZ |
268 | __u16 misc; |
269 | __u16 size; | |
5c148194 PZ |
270 | }; |
271 | ||
272 | enum perf_event_type { | |
5ed00415 | 273 | |
0c593b34 PZ |
274 | /* |
275 | * The MMAP events record the PROT_EXEC mappings so that we can | |
276 | * correlate userspace IPs to code. They have the following structure: | |
277 | * | |
278 | * struct { | |
0127c3ea | 279 | * struct perf_event_header header; |
0c593b34 | 280 | * |
0127c3ea IM |
281 | * u32 pid, tid; |
282 | * u64 addr; | |
283 | * u64 len; | |
284 | * u64 pgoff; | |
285 | * char filename[]; | |
0c593b34 PZ |
286 | * }; |
287 | */ | |
8a057d84 | 288 | PERF_EVENT_MMAP = 1, |
0a4a9391 | 289 | |
43a21ea8 PZ |
290 | /* |
291 | * struct { | |
292 | * struct perf_event_header header; | |
293 | * u64 id; | |
294 | * u64 lost; | |
295 | * }; | |
296 | */ | |
297 | PERF_EVENT_LOST = 2, | |
298 | ||
8d1b2d93 PZ |
299 | /* |
300 | * struct { | |
0127c3ea | 301 | * struct perf_event_header header; |
8d1b2d93 | 302 | * |
0127c3ea IM |
303 | * u32 pid, tid; |
304 | * char comm[]; | |
8d1b2d93 PZ |
305 | * }; |
306 | */ | |
307 | PERF_EVENT_COMM = 3, | |
308 | ||
26b119bc PZ |
309 | /* |
310 | * struct { | |
0127c3ea IM |
311 | * struct perf_event_header header; |
312 | * u64 time; | |
689802b2 | 313 | * u64 id; |
b23f3325 | 314 | * u64 sample_period; |
26b119bc PZ |
315 | * }; |
316 | */ | |
317 | PERF_EVENT_PERIOD = 4, | |
318 | ||
a78ac325 PZ |
319 | /* |
320 | * struct { | |
0127c3ea IM |
321 | * struct perf_event_header header; |
322 | * u64 time; | |
cca3f454 | 323 | * u64 id; |
a78ac325 PZ |
324 | * }; |
325 | */ | |
326 | PERF_EVENT_THROTTLE = 5, | |
327 | PERF_EVENT_UNTHROTTLE = 6, | |
328 | ||
60313ebe PZ |
329 | /* |
330 | * struct { | |
a21ca2ca IM |
331 | * struct perf_event_header header; |
332 | * u32 pid, ppid; | |
60313ebe PZ |
333 | * }; |
334 | */ | |
335 | PERF_EVENT_FORK = 7, | |
336 | ||
8a057d84 | 337 | /* |
6b6e5486 | 338 | * When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field |
43a21ea8 | 339 | * will be PERF_SAMPLE_* |
0c593b34 PZ |
340 | * |
341 | * struct { | |
0127c3ea | 342 | * struct perf_event_header header; |
0c593b34 | 343 | * |
43a21ea8 PZ |
344 | * { u64 ip; } && PERF_SAMPLE_IP |
345 | * { u32 pid, tid; } && PERF_SAMPLE_TID | |
346 | * { u64 time; } && PERF_SAMPLE_TIME | |
347 | * { u64 addr; } && PERF_SAMPLE_ADDR | |
348 | * { u64 config; } && PERF_SAMPLE_CONFIG | |
349 | * { u32 cpu, res; } && PERF_SAMPLE_CPU | |
0c593b34 | 350 | * |
0127c3ea | 351 | * { u64 nr; |
43a21ea8 | 352 | * { u64 id, val; } cnt[nr]; } && PERF_SAMPLE_GROUP |
0c593b34 | 353 | * |
f9188e02 | 354 | * { u64 nr, |
43a21ea8 | 355 | * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN |
0c593b34 | 356 | * }; |
8a057d84 | 357 | */ |
5c148194 PZ |
358 | }; |
359 | ||
f9188e02 PZ |
360 | enum perf_callchain_context { |
361 | PERF_CONTEXT_HV = (__u64)-32, | |
362 | PERF_CONTEXT_KERNEL = (__u64)-128, | |
363 | PERF_CONTEXT_USER = (__u64)-512, | |
7522060c | 364 | |
f9188e02 PZ |
365 | PERF_CONTEXT_GUEST = (__u64)-2048, |
366 | PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176, | |
367 | PERF_CONTEXT_GUEST_USER = (__u64)-2560, | |
368 | ||
369 | PERF_CONTEXT_MAX = (__u64)-4095, | |
7522060c IM |
370 | }; |
371 | ||
f3dfd265 | 372 | #ifdef __KERNEL__ |
9f66a381 | 373 | /* |
f3dfd265 | 374 | * Kernel-internal data types and definitions: |
9f66a381 IM |
375 | */ |
376 | ||
f3dfd265 PM |
377 | #ifdef CONFIG_PERF_COUNTERS |
378 | # include <asm/perf_counter.h> | |
379 | #endif | |
380 | ||
381 | #include <linux/list.h> | |
382 | #include <linux/mutex.h> | |
383 | #include <linux/rculist.h> | |
384 | #include <linux/rcupdate.h> | |
385 | #include <linux/spinlock.h> | |
d6d020e9 | 386 | #include <linux/hrtimer.h> |
3c446b3d | 387 | #include <linux/fs.h> |
709e50cf | 388 | #include <linux/pid_namespace.h> |
f3dfd265 PM |
389 | #include <asm/atomic.h> |
390 | ||
f9188e02 PZ |
391 | #define PERF_MAX_STACK_DEPTH 255 |
392 | ||
393 | struct perf_callchain_entry { | |
394 | __u64 nr; | |
395 | __u64 ip[PERF_MAX_STACK_DEPTH]; | |
396 | }; | |
397 | ||
f3dfd265 PM |
398 | struct task_struct; |
399 | ||
0793a61d | 400 | /** |
9f66a381 | 401 | * struct hw_perf_counter - performance counter hardware details: |
0793a61d TG |
402 | */ |
403 | struct hw_perf_counter { | |
ee06094f | 404 | #ifdef CONFIG_PERF_COUNTERS |
d6d020e9 PZ |
405 | union { |
406 | struct { /* hardware */ | |
a308444c IM |
407 | u64 config; |
408 | unsigned long config_base; | |
409 | unsigned long counter_base; | |
410 | int idx; | |
d6d020e9 PZ |
411 | }; |
412 | union { /* software */ | |
a308444c IM |
413 | atomic64_t count; |
414 | struct hrtimer hrtimer; | |
d6d020e9 PZ |
415 | }; |
416 | }; | |
ee06094f | 417 | atomic64_t prev_count; |
b23f3325 | 418 | u64 sample_period; |
9e350de3 | 419 | u64 last_period; |
ee06094f | 420 | atomic64_t period_left; |
60db5e09 | 421 | u64 interrupts; |
6a24ed6c PZ |
422 | |
423 | u64 freq_count; | |
424 | u64 freq_interrupts; | |
bd2b5b12 | 425 | u64 freq_stamp; |
ee06094f | 426 | #endif |
0793a61d TG |
427 | }; |
428 | ||
621a01ea IM |
429 | struct perf_counter; |
430 | ||
431 | /** | |
4aeb0b42 | 432 | * struct pmu - generic performance monitoring unit |
621a01ea | 433 | */ |
4aeb0b42 | 434 | struct pmu { |
95cdd2e7 | 435 | int (*enable) (struct perf_counter *counter); |
7671581f IM |
436 | void (*disable) (struct perf_counter *counter); |
437 | void (*read) (struct perf_counter *counter); | |
a78ac325 | 438 | void (*unthrottle) (struct perf_counter *counter); |
621a01ea IM |
439 | }; |
440 | ||
6a930700 IM |
441 | /** |
442 | * enum perf_counter_active_state - the states of a counter | |
443 | */ | |
444 | enum perf_counter_active_state { | |
3b6f9e5c | 445 | PERF_COUNTER_STATE_ERROR = -2, |
6a930700 IM |
446 | PERF_COUNTER_STATE_OFF = -1, |
447 | PERF_COUNTER_STATE_INACTIVE = 0, | |
448 | PERF_COUNTER_STATE_ACTIVE = 1, | |
449 | }; | |
450 | ||
9b51f66d IM |
451 | struct file; |
452 | ||
7b732a75 PZ |
453 | struct perf_mmap_data { |
454 | struct rcu_head rcu_head; | |
8740f941 | 455 | int nr_pages; /* nr of data pages */ |
43a21ea8 | 456 | int writable; /* are we writable */ |
c5078f78 | 457 | int nr_locked; /* nr pages mlocked */ |
8740f941 | 458 | |
c33a0bc4 | 459 | atomic_t poll; /* POLL_ for wakeups */ |
8740f941 PZ |
460 | atomic_t events; /* event limit */ |
461 | ||
8e3747c1 PZ |
462 | atomic_long_t head; /* write position */ |
463 | atomic_long_t done_head; /* completed head */ | |
464 | ||
c33a0bc4 | 465 | atomic_t lock; /* concurrent writes */ |
c66de4a5 | 466 | atomic_t wakeup; /* needs a wakeup */ |
43a21ea8 | 467 | atomic_t lost; /* nr records lost */ |
c66de4a5 | 468 | |
7b732a75 | 469 | struct perf_counter_mmap_page *user_page; |
0127c3ea | 470 | void *data_pages[0]; |
7b732a75 PZ |
471 | }; |
472 | ||
671dec5d PZ |
473 | struct perf_pending_entry { |
474 | struct perf_pending_entry *next; | |
475 | void (*func)(struct perf_pending_entry *); | |
925d519a PZ |
476 | }; |
477 | ||
0793a61d TG |
478 | /** |
479 | * struct perf_counter - performance counter kernel representation: | |
480 | */ | |
481 | struct perf_counter { | |
ee06094f | 482 | #ifdef CONFIG_PERF_COUNTERS |
04289bb9 | 483 | struct list_head list_entry; |
592903cd | 484 | struct list_head event_entry; |
04289bb9 | 485 | struct list_head sibling_list; |
0127c3ea | 486 | int nr_siblings; |
04289bb9 | 487 | struct perf_counter *group_leader; |
4aeb0b42 | 488 | const struct pmu *pmu; |
04289bb9 | 489 | |
6a930700 | 490 | enum perf_counter_active_state state; |
0793a61d | 491 | atomic64_t count; |
ee06094f | 492 | |
53cfbf59 PM |
493 | /* |
494 | * These are the total time in nanoseconds that the counter | |
495 | * has been enabled (i.e. eligible to run, and the task has | |
496 | * been scheduled in, if this is a per-task counter) | |
497 | * and running (scheduled onto the CPU), respectively. | |
498 | * | |
499 | * They are computed from tstamp_enabled, tstamp_running and | |
500 | * tstamp_stopped when the counter is in INACTIVE or ACTIVE state. | |
501 | */ | |
502 | u64 total_time_enabled; | |
503 | u64 total_time_running; | |
504 | ||
505 | /* | |
506 | * These are timestamps used for computing total_time_enabled | |
507 | * and total_time_running when the counter is in INACTIVE or | |
508 | * ACTIVE state, measured in nanoseconds from an arbitrary point | |
509 | * in time. | |
510 | * tstamp_enabled: the notional time when the counter was enabled | |
511 | * tstamp_running: the notional time when the counter was scheduled on | |
512 | * tstamp_stopped: in INACTIVE state, the notional time when the | |
513 | * counter was scheduled off. | |
514 | */ | |
515 | u64 tstamp_enabled; | |
516 | u64 tstamp_running; | |
517 | u64 tstamp_stopped; | |
518 | ||
0d48696f | 519 | struct perf_counter_attr attr; |
0793a61d TG |
520 | struct hw_perf_counter hw; |
521 | ||
522 | struct perf_counter_context *ctx; | |
9b51f66d | 523 | struct file *filp; |
0793a61d | 524 | |
53cfbf59 PM |
525 | /* |
526 | * These accumulate total time (in nanoseconds) that children | |
527 | * counters have been enabled and running, respectively. | |
528 | */ | |
529 | atomic64_t child_total_time_enabled; | |
530 | atomic64_t child_total_time_running; | |
531 | ||
0793a61d | 532 | /* |
d859e29f | 533 | * Protect attach/detach and child_list: |
0793a61d | 534 | */ |
fccc714b PZ |
535 | struct mutex child_mutex; |
536 | struct list_head child_list; | |
537 | struct perf_counter *parent; | |
0793a61d TG |
538 | |
539 | int oncpu; | |
540 | int cpu; | |
541 | ||
082ff5a2 PZ |
542 | struct list_head owner_entry; |
543 | struct task_struct *owner; | |
544 | ||
7b732a75 PZ |
545 | /* mmap bits */ |
546 | struct mutex mmap_mutex; | |
547 | atomic_t mmap_count; | |
548 | struct perf_mmap_data *data; | |
37d81828 | 549 | |
7b732a75 | 550 | /* poll related */ |
0793a61d | 551 | wait_queue_head_t waitq; |
3c446b3d | 552 | struct fasync_struct *fasync; |
79f14641 PZ |
553 | |
554 | /* delayed work for NMIs and such */ | |
555 | int pending_wakeup; | |
4c9e2542 | 556 | int pending_kill; |
79f14641 | 557 | int pending_disable; |
671dec5d | 558 | struct perf_pending_entry pending; |
592903cd | 559 | |
79f14641 PZ |
560 | atomic_t event_limit; |
561 | ||
e077df4f | 562 | void (*destroy)(struct perf_counter *); |
592903cd | 563 | struct rcu_head rcu_head; |
709e50cf PZ |
564 | |
565 | struct pid_namespace *ns; | |
8e5799b1 | 566 | u64 id; |
ee06094f | 567 | #endif |
0793a61d TG |
568 | }; |
569 | ||
570 | /** | |
571 | * struct perf_counter_context - counter context structure | |
572 | * | |
573 | * Used as a container for task counters and CPU counters as well: | |
574 | */ | |
575 | struct perf_counter_context { | |
0793a61d | 576 | /* |
d859e29f PM |
577 | * Protect the states of the counters in the list, |
578 | * nr_active, and the list: | |
0793a61d | 579 | */ |
a308444c | 580 | spinlock_t lock; |
d859e29f PM |
581 | /* |
582 | * Protect the list of counters. Locking either mutex or lock | |
583 | * is sufficient to ensure the list doesn't change; to change | |
584 | * the list you need to lock both the mutex and the spinlock. | |
585 | */ | |
a308444c | 586 | struct mutex mutex; |
04289bb9 | 587 | |
a308444c IM |
588 | struct list_head counter_list; |
589 | struct list_head event_list; | |
590 | int nr_counters; | |
591 | int nr_active; | |
592 | int is_active; | |
593 | atomic_t refcount; | |
594 | struct task_struct *task; | |
53cfbf59 PM |
595 | |
596 | /* | |
4af4998b | 597 | * Context clock, runs when context enabled. |
53cfbf59 | 598 | */ |
a308444c IM |
599 | u64 time; |
600 | u64 timestamp; | |
564c2b21 PM |
601 | |
602 | /* | |
603 | * These fields let us detect when two contexts have both | |
604 | * been cloned (inherited) from a common ancestor. | |
605 | */ | |
a308444c IM |
606 | struct perf_counter_context *parent_ctx; |
607 | u64 parent_gen; | |
608 | u64 generation; | |
609 | int pin_count; | |
610 | struct rcu_head rcu_head; | |
0793a61d TG |
611 | }; |
612 | ||
613 | /** | |
614 | * struct perf_counter_cpu_context - per cpu counter context structure | |
615 | */ | |
616 | struct perf_cpu_context { | |
617 | struct perf_counter_context ctx; | |
618 | struct perf_counter_context *task_ctx; | |
619 | int active_oncpu; | |
620 | int max_pertask; | |
3b6f9e5c | 621 | int exclusive; |
96f6d444 PZ |
622 | |
623 | /* | |
624 | * Recursion avoidance: | |
625 | * | |
626 | * task, softirq, irq, nmi context | |
627 | */ | |
22a4f650 | 628 | int recursion[4]; |
0793a61d TG |
629 | }; |
630 | ||
829b42dd RR |
631 | #ifdef CONFIG_PERF_COUNTERS |
632 | ||
0793a61d TG |
633 | /* |
634 | * Set by architecture code: | |
635 | */ | |
636 | extern int perf_max_counters; | |
637 | ||
4aeb0b42 | 638 | extern const struct pmu *hw_perf_counter_init(struct perf_counter *counter); |
621a01ea | 639 | |
0793a61d | 640 | extern void perf_counter_task_sched_in(struct task_struct *task, int cpu); |
564c2b21 PM |
641 | extern void perf_counter_task_sched_out(struct task_struct *task, |
642 | struct task_struct *next, int cpu); | |
0793a61d | 643 | extern void perf_counter_task_tick(struct task_struct *task, int cpu); |
6ab423e0 | 644 | extern int perf_counter_init_task(struct task_struct *child); |
9b51f66d | 645 | extern void perf_counter_exit_task(struct task_struct *child); |
bbbee908 | 646 | extern void perf_counter_free_task(struct task_struct *task); |
9974458e | 647 | extern void set_perf_counter_pending(void); |
925d519a | 648 | extern void perf_counter_do_pending(void); |
0793a61d | 649 | extern void perf_counter_print_debug(void); |
9e35ad38 PZ |
650 | extern void __perf_disable(void); |
651 | extern bool __perf_enable(void); | |
652 | extern void perf_disable(void); | |
653 | extern void perf_enable(void); | |
1d1c7ddb IM |
654 | extern int perf_counter_task_disable(void); |
655 | extern int perf_counter_task_enable(void); | |
3cbed429 PM |
656 | extern int hw_perf_group_sched_in(struct perf_counter *group_leader, |
657 | struct perf_cpu_context *cpuctx, | |
658 | struct perf_counter_context *ctx, int cpu); | |
37d81828 | 659 | extern void perf_counter_update_userpage(struct perf_counter *counter); |
5c92d124 | 660 | |
df1a132b | 661 | struct perf_sample_data { |
a308444c IM |
662 | struct pt_regs *regs; |
663 | u64 addr; | |
664 | u64 period; | |
df1a132b PZ |
665 | }; |
666 | ||
667 | extern int perf_counter_overflow(struct perf_counter *counter, int nmi, | |
668 | struct perf_sample_data *data); | |
669 | ||
3b6f9e5c PM |
670 | /* |
671 | * Return 1 for a software counter, 0 for a hardware counter | |
672 | */ | |
673 | static inline int is_software_counter(struct perf_counter *counter) | |
674 | { | |
a21ca2ca | 675 | return (counter->attr.type != PERF_TYPE_RAW) && |
f1a3c979 PZ |
676 | (counter->attr.type != PERF_TYPE_HARDWARE) && |
677 | (counter->attr.type != PERF_TYPE_HW_CACHE); | |
3b6f9e5c PM |
678 | } |
679 | ||
f29ac756 PZ |
680 | extern atomic_t perf_swcounter_enabled[PERF_COUNT_SW_MAX]; |
681 | ||
682 | extern void __perf_swcounter_event(u32, u64, int, struct pt_regs *, u64); | |
683 | ||
684 | static inline void | |
685 | perf_swcounter_event(u32 event, u64 nr, int nmi, struct pt_regs *regs, u64 addr) | |
686 | { | |
687 | if (atomic_read(&perf_swcounter_enabled[event])) | |
688 | __perf_swcounter_event(event, nr, nmi, regs, addr); | |
689 | } | |
15dbf27c | 690 | |
089dd79d PZ |
691 | extern void __perf_counter_mmap(struct vm_area_struct *vma); |
692 | ||
693 | static inline void perf_counter_mmap(struct vm_area_struct *vma) | |
694 | { | |
695 | if (vma->vm_flags & VM_EXEC) | |
696 | __perf_counter_mmap(vma); | |
697 | } | |
0a4a9391 | 698 | |
8d1b2d93 | 699 | extern void perf_counter_comm(struct task_struct *tsk); |
60313ebe | 700 | extern void perf_counter_fork(struct task_struct *tsk); |
8d1b2d93 | 701 | |
394ee076 PZ |
702 | extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); |
703 | ||
0764771d | 704 | extern int sysctl_perf_counter_paranoid; |
c5078f78 | 705 | extern int sysctl_perf_counter_mlock; |
df58ab24 | 706 | extern int sysctl_perf_counter_sample_rate; |
1ccd1549 | 707 | |
0d905bca IM |
708 | extern void perf_counter_init(void); |
709 | ||
9d23a90a PM |
710 | #ifndef perf_misc_flags |
711 | #define perf_misc_flags(regs) (user_mode(regs) ? PERF_EVENT_MISC_USER : \ | |
712 | PERF_EVENT_MISC_KERNEL) | |
713 | #define perf_instruction_pointer(regs) instruction_pointer(regs) | |
714 | #endif | |
715 | ||
0793a61d TG |
716 | #else |
717 | static inline void | |
718 | perf_counter_task_sched_in(struct task_struct *task, int cpu) { } | |
719 | static inline void | |
910431c7 IM |
720 | perf_counter_task_sched_out(struct task_struct *task, |
721 | struct task_struct *next, int cpu) { } | |
0793a61d TG |
722 | static inline void |
723 | perf_counter_task_tick(struct task_struct *task, int cpu) { } | |
d3e78ee3 | 724 | static inline int perf_counter_init_task(struct task_struct *child) { return 0; } |
9b51f66d | 725 | static inline void perf_counter_exit_task(struct task_struct *child) { } |
bbbee908 | 726 | static inline void perf_counter_free_task(struct task_struct *task) { } |
925d519a | 727 | static inline void perf_counter_do_pending(void) { } |
0793a61d | 728 | static inline void perf_counter_print_debug(void) { } |
9e35ad38 PZ |
729 | static inline void perf_disable(void) { } |
730 | static inline void perf_enable(void) { } | |
1d1c7ddb IM |
731 | static inline int perf_counter_task_disable(void) { return -EINVAL; } |
732 | static inline int perf_counter_task_enable(void) { return -EINVAL; } | |
15dbf27c | 733 | |
925d519a | 734 | static inline void |
78f13e95 PZ |
735 | perf_swcounter_event(u32 event, u64 nr, int nmi, |
736 | struct pt_regs *regs, u64 addr) { } | |
0a4a9391 | 737 | |
089dd79d | 738 | static inline void perf_counter_mmap(struct vm_area_struct *vma) { } |
8d1b2d93 | 739 | static inline void perf_counter_comm(struct task_struct *tsk) { } |
60313ebe | 740 | static inline void perf_counter_fork(struct task_struct *tsk) { } |
0d905bca | 741 | static inline void perf_counter_init(void) { } |
0793a61d TG |
742 | #endif |
743 | ||
f3dfd265 | 744 | #endif /* __KERNEL__ */ |
0793a61d | 745 | #endif /* _LINUX_PERF_COUNTER_H */ |