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