![Ingo Molnar](/assets/img/avatar_default.png)
Merge reason: We want to queue up a dependent patch. Also update to later -rc's. Signed-off-by: Ingo Molnar <mingo@elte.hu>
918 lines
23 KiB
C
918 lines
23 KiB
C
/*
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* Performance events:
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*
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* Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
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* Copyright (C) 2008-2009, Red Hat, Inc., Ingo Molnar
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* Copyright (C) 2008-2009, Red Hat, Inc., Peter Zijlstra
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*
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* Data type definitions, declarations, prototypes.
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*
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* Started by: Thomas Gleixner and Ingo Molnar
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*
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* For licencing details see kernel-base/COPYING
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*/
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#ifndef _LINUX_PERF_EVENT_H
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#define _LINUX_PERF_EVENT_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <asm/byteorder.h>
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/*
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* User-space ABI bits:
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*/
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/*
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* attr.type
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*/
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enum perf_type_id {
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PERF_TYPE_HARDWARE = 0,
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PERF_TYPE_SOFTWARE = 1,
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PERF_TYPE_TRACEPOINT = 2,
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PERF_TYPE_HW_CACHE = 3,
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PERF_TYPE_RAW = 4,
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PERF_TYPE_BREAKPOINT = 5,
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PERF_TYPE_MAX, /* non-ABI */
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};
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/*
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* Generalized performance event event_id types, used by the
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* attr.event_id parameter of the sys_perf_event_open()
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* syscall:
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*/
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enum perf_hw_id {
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/*
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* Common hardware events, generalized by the kernel:
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*/
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PERF_COUNT_HW_CPU_CYCLES = 0,
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PERF_COUNT_HW_INSTRUCTIONS = 1,
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PERF_COUNT_HW_CACHE_REFERENCES = 2,
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PERF_COUNT_HW_CACHE_MISSES = 3,
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PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
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PERF_COUNT_HW_BRANCH_MISSES = 5,
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PERF_COUNT_HW_BUS_CYCLES = 6,
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PERF_COUNT_HW_MAX, /* non-ABI */
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};
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/*
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* Generalized hardware cache events:
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*
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* { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
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* { read, write, prefetch } x
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* { accesses, misses }
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*/
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enum perf_hw_cache_id {
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PERF_COUNT_HW_CACHE_L1D = 0,
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PERF_COUNT_HW_CACHE_L1I = 1,
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PERF_COUNT_HW_CACHE_LL = 2,
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PERF_COUNT_HW_CACHE_DTLB = 3,
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PERF_COUNT_HW_CACHE_ITLB = 4,
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PERF_COUNT_HW_CACHE_BPU = 5,
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PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
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};
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enum perf_hw_cache_op_id {
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PERF_COUNT_HW_CACHE_OP_READ = 0,
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PERF_COUNT_HW_CACHE_OP_WRITE = 1,
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PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
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PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
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};
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enum perf_hw_cache_op_result_id {
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PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
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PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
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PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
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};
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/*
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* Special "software" events provided by the kernel, even if the hardware
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* does not support performance events. These events measure various
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* physical and sw events of the kernel (and allow the profiling of them as
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* well):
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*/
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enum perf_sw_ids {
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PERF_COUNT_SW_CPU_CLOCK = 0,
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PERF_COUNT_SW_TASK_CLOCK = 1,
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PERF_COUNT_SW_PAGE_FAULTS = 2,
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PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
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PERF_COUNT_SW_CPU_MIGRATIONS = 4,
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PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
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PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
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PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
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PERF_COUNT_SW_EMULATION_FAULTS = 8,
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PERF_COUNT_SW_MAX, /* non-ABI */
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};
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/*
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* Bits that can be set in attr.sample_type to request information
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* in the overflow packets.
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*/
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enum perf_event_sample_format {
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PERF_SAMPLE_IP = 1U << 0,
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PERF_SAMPLE_TID = 1U << 1,
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PERF_SAMPLE_TIME = 1U << 2,
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PERF_SAMPLE_ADDR = 1U << 3,
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PERF_SAMPLE_READ = 1U << 4,
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PERF_SAMPLE_CALLCHAIN = 1U << 5,
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PERF_SAMPLE_ID = 1U << 6,
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PERF_SAMPLE_CPU = 1U << 7,
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PERF_SAMPLE_PERIOD = 1U << 8,
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PERF_SAMPLE_STREAM_ID = 1U << 9,
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PERF_SAMPLE_RAW = 1U << 10,
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PERF_SAMPLE_MAX = 1U << 11, /* non-ABI */
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};
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/*
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* The format of the data returned by read() on a perf event fd,
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* as specified by attr.read_format:
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*
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* struct read_format {
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* { u64 value;
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* { u64 time_enabled; } && PERF_FORMAT_ENABLED
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* { u64 time_running; } && PERF_FORMAT_RUNNING
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* { u64 id; } && PERF_FORMAT_ID
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* } && !PERF_FORMAT_GROUP
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*
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* { u64 nr;
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* { u64 time_enabled; } && PERF_FORMAT_ENABLED
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* { u64 time_running; } && PERF_FORMAT_RUNNING
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* { u64 value;
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* { u64 id; } && PERF_FORMAT_ID
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* } cntr[nr];
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* } && PERF_FORMAT_GROUP
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* };
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*/
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enum perf_event_read_format {
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PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0,
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PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1,
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PERF_FORMAT_ID = 1U << 2,
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PERF_FORMAT_GROUP = 1U << 3,
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PERF_FORMAT_MAX = 1U << 4, /* non-ABI */
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};
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#define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */
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/*
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* Hardware event_id to monitor via a performance monitoring event:
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*/
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struct perf_event_attr {
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/*
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* Major type: hardware/software/tracepoint/etc.
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*/
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__u32 type;
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/*
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* Size of the attr structure, for fwd/bwd compat.
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*/
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__u32 size;
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/*
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* Type specific configuration information.
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*/
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__u64 config;
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union {
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__u64 sample_period;
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__u64 sample_freq;
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};
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__u64 sample_type;
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__u64 read_format;
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__u64 disabled : 1, /* off by default */
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inherit : 1, /* children inherit it */
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pinned : 1, /* must always be on PMU */
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exclusive : 1, /* only group on PMU */
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exclude_user : 1, /* don't count user */
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exclude_kernel : 1, /* ditto kernel */
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exclude_hv : 1, /* ditto hypervisor */
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exclude_idle : 1, /* don't count when idle */
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mmap : 1, /* include mmap data */
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comm : 1, /* include comm data */
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freq : 1, /* use freq, not period */
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inherit_stat : 1, /* per task counts */
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enable_on_exec : 1, /* next exec enables */
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task : 1, /* trace fork/exit */
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watermark : 1, /* wakeup_watermark */
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__reserved_1 : 49;
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union {
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__u32 wakeup_events; /* wakeup every n events */
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__u32 wakeup_watermark; /* bytes before wakeup */
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};
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__u32 __reserved_2;
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__u64 bp_addr;
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__u32 bp_type;
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__u32 bp_len;
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};
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/*
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* Ioctls that can be done on a perf event fd:
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*/
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#define PERF_EVENT_IOC_ENABLE _IO ('$', 0)
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#define PERF_EVENT_IOC_DISABLE _IO ('$', 1)
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#define PERF_EVENT_IOC_REFRESH _IO ('$', 2)
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#define PERF_EVENT_IOC_RESET _IO ('$', 3)
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#define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64)
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#define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
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#define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *)
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enum perf_event_ioc_flags {
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PERF_IOC_FLAG_GROUP = 1U << 0,
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};
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/*
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* Structure of the page that can be mapped via mmap
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*/
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struct perf_event_mmap_page {
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__u32 version; /* version number of this structure */
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__u32 compat_version; /* lowest version this is compat with */
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/*
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* Bits needed to read the hw events in user-space.
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*
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* u32 seq;
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* s64 count;
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*
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* do {
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* seq = pc->lock;
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*
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* barrier()
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* if (pc->index) {
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* count = pmc_read(pc->index - 1);
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* count += pc->offset;
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* } else
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* goto regular_read;
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*
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* barrier();
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* } while (pc->lock != seq);
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*
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* NOTE: for obvious reason this only works on self-monitoring
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* processes.
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*/
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__u32 lock; /* seqlock for synchronization */
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__u32 index; /* hardware event identifier */
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__s64 offset; /* add to hardware event value */
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__u64 time_enabled; /* time event active */
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__u64 time_running; /* time event on cpu */
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/*
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* Hole for extension of the self monitor capabilities
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*/
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__u64 __reserved[123]; /* align to 1k */
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/*
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* Control data for the mmap() data buffer.
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*
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* User-space reading the @data_head value should issue an rmb(), on
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* SMP capable platforms, after reading this value -- see
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* perf_event_wakeup().
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*
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* When the mapping is PROT_WRITE the @data_tail value should be
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* written by userspace to reflect the last read data. In this case
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* the kernel will not over-write unread data.
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*/
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__u64 data_head; /* head in the data section */
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__u64 data_tail; /* user-space written tail */
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};
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#define PERF_RECORD_MISC_CPUMODE_MASK (3 << 0)
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#define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
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#define PERF_RECORD_MISC_KERNEL (1 << 0)
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#define PERF_RECORD_MISC_USER (2 << 0)
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#define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
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struct perf_event_header {
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__u32 type;
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__u16 misc;
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__u16 size;
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};
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enum perf_event_type {
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/*
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* The MMAP events record the PROT_EXEC mappings so that we can
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* correlate userspace IPs to code. They have the following structure:
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*
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* struct {
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* struct perf_event_header header;
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*
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* u32 pid, tid;
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* u64 addr;
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* u64 len;
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* u64 pgoff;
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* char filename[];
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* };
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*/
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PERF_RECORD_MMAP = 1,
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/*
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* struct {
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* struct perf_event_header header;
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* u64 id;
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* u64 lost;
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* };
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*/
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PERF_RECORD_LOST = 2,
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/*
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* struct {
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* struct perf_event_header header;
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*
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* u32 pid, tid;
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* char comm[];
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* };
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*/
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PERF_RECORD_COMM = 3,
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/*
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* struct {
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* struct perf_event_header header;
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* u32 pid, ppid;
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* u32 tid, ptid;
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* u64 time;
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* };
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*/
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PERF_RECORD_EXIT = 4,
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/*
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* struct {
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* struct perf_event_header header;
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* u64 time;
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* u64 id;
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* u64 stream_id;
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* };
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*/
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PERF_RECORD_THROTTLE = 5,
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PERF_RECORD_UNTHROTTLE = 6,
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/*
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* struct {
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* struct perf_event_header header;
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* u32 pid, ppid;
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* u32 tid, ptid;
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* u64 time;
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* };
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*/
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PERF_RECORD_FORK = 7,
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/*
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* struct {
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* struct perf_event_header header;
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* u32 pid, tid;
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*
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* struct read_format values;
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* };
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*/
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PERF_RECORD_READ = 8,
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/*
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* struct {
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* struct perf_event_header header;
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*
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* { u64 ip; } && PERF_SAMPLE_IP
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* { u32 pid, tid; } && PERF_SAMPLE_TID
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* { u64 time; } && PERF_SAMPLE_TIME
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* { u64 addr; } && PERF_SAMPLE_ADDR
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* { u64 id; } && PERF_SAMPLE_ID
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* { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
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* { u32 cpu, res; } && PERF_SAMPLE_CPU
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* { u64 period; } && PERF_SAMPLE_PERIOD
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*
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* { struct read_format values; } && PERF_SAMPLE_READ
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*
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* { u64 nr,
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* u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
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*
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* #
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* # The RAW record below is opaque data wrt the ABI
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* #
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* # That is, the ABI doesn't make any promises wrt to
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* # the stability of its content, it may vary depending
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* # on event, hardware, kernel version and phase of
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* # the moon.
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* #
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* # In other words, PERF_SAMPLE_RAW contents are not an ABI.
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* #
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*
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* { u32 size;
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* char data[size];}&& PERF_SAMPLE_RAW
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* };
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*/
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PERF_RECORD_SAMPLE = 9,
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PERF_RECORD_MAX, /* non-ABI */
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};
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enum perf_callchain_context {
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PERF_CONTEXT_HV = (__u64)-32,
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PERF_CONTEXT_KERNEL = (__u64)-128,
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PERF_CONTEXT_USER = (__u64)-512,
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PERF_CONTEXT_GUEST = (__u64)-2048,
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PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176,
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PERF_CONTEXT_GUEST_USER = (__u64)-2560,
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PERF_CONTEXT_MAX = (__u64)-4095,
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};
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#define PERF_FLAG_FD_NO_GROUP (1U << 0)
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#define PERF_FLAG_FD_OUTPUT (1U << 1)
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#ifdef __KERNEL__
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/*
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* Kernel-internal data types and definitions:
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*/
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#ifdef CONFIG_PERF_EVENTS
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# include <asm/perf_event.h>
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#endif
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#ifdef CONFIG_HAVE_HW_BREAKPOINT
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#include <asm/hw_breakpoint.h>
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#endif
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/rculist.h>
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#include <linux/rcupdate.h>
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#include <linux/spinlock.h>
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#include <linux/hrtimer.h>
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#include <linux/fs.h>
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#include <linux/pid_namespace.h>
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#include <linux/workqueue.h>
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#include <asm/atomic.h>
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#define PERF_MAX_STACK_DEPTH 255
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struct perf_callchain_entry {
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__u64 nr;
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__u64 ip[PERF_MAX_STACK_DEPTH];
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};
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struct perf_raw_record {
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u32 size;
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void *data;
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};
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struct task_struct;
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/**
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* struct hw_perf_event - performance event hardware details:
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*/
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struct hw_perf_event {
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#ifdef CONFIG_PERF_EVENTS
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union {
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struct { /* hardware */
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u64 config;
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unsigned long config_base;
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unsigned long event_base;
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int idx;
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};
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struct { /* software */
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s64 remaining;
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struct hrtimer hrtimer;
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};
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#ifdef CONFIG_HAVE_HW_BREAKPOINT
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union { /* breakpoint */
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struct arch_hw_breakpoint info;
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};
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#endif
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};
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atomic64_t prev_count;
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u64 sample_period;
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u64 last_period;
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atomic64_t period_left;
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u64 interrupts;
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u64 freq_time_stamp;
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u64 freq_count_stamp;
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#endif
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};
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struct perf_event;
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/**
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* struct pmu - generic performance monitoring unit
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*/
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struct pmu {
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int (*enable) (struct perf_event *event);
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void (*disable) (struct perf_event *event);
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void (*read) (struct perf_event *event);
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void (*unthrottle) (struct perf_event *event);
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};
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/**
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* enum perf_event_active_state - the states of a event
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*/
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enum perf_event_active_state {
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PERF_EVENT_STATE_ERROR = -2,
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PERF_EVENT_STATE_OFF = -1,
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PERF_EVENT_STATE_INACTIVE = 0,
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PERF_EVENT_STATE_ACTIVE = 1,
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};
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struct file;
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struct perf_mmap_data {
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struct rcu_head rcu_head;
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#ifdef CONFIG_PERF_USE_VMALLOC
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struct work_struct work;
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#endif
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int data_order;
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int nr_pages; /* nr of data pages */
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int writable; /* are we writable */
|
|
int nr_locked; /* nr pages mlocked */
|
|
|
|
atomic_t poll; /* POLL_ for wakeups */
|
|
atomic_t events; /* event_id limit */
|
|
|
|
atomic_long_t head; /* write position */
|
|
atomic_long_t done_head; /* completed head */
|
|
|
|
atomic_t lock; /* concurrent writes */
|
|
atomic_t wakeup; /* needs a wakeup */
|
|
atomic_t lost; /* nr records lost */
|
|
|
|
long watermark; /* wakeup watermark */
|
|
|
|
struct perf_event_mmap_page *user_page;
|
|
void *data_pages[0];
|
|
};
|
|
|
|
struct perf_pending_entry {
|
|
struct perf_pending_entry *next;
|
|
void (*func)(struct perf_pending_entry *);
|
|
};
|
|
|
|
struct perf_sample_data;
|
|
|
|
typedef void (*perf_overflow_handler_t)(struct perf_event *, int,
|
|
struct perf_sample_data *,
|
|
struct pt_regs *regs);
|
|
|
|
enum perf_group_flag {
|
|
PERF_GROUP_SOFTWARE = 0x1,
|
|
};
|
|
|
|
/**
|
|
* struct perf_event - performance event kernel representation:
|
|
*/
|
|
struct perf_event {
|
|
#ifdef CONFIG_PERF_EVENTS
|
|
struct list_head group_entry;
|
|
struct list_head event_entry;
|
|
struct list_head sibling_list;
|
|
int nr_siblings;
|
|
int group_flags;
|
|
struct perf_event *group_leader;
|
|
struct perf_event *output;
|
|
const struct pmu *pmu;
|
|
|
|
enum perf_event_active_state state;
|
|
atomic64_t count;
|
|
|
|
/*
|
|
* These are the total time in nanoseconds that the event
|
|
* has been enabled (i.e. eligible to run, and the task has
|
|
* been scheduled in, if this is a per-task event)
|
|
* and running (scheduled onto the CPU), respectively.
|
|
*
|
|
* They are computed from tstamp_enabled, tstamp_running and
|
|
* tstamp_stopped when the event is in INACTIVE or ACTIVE state.
|
|
*/
|
|
u64 total_time_enabled;
|
|
u64 total_time_running;
|
|
|
|
/*
|
|
* These are timestamps used for computing total_time_enabled
|
|
* and total_time_running when the event is in INACTIVE or
|
|
* ACTIVE state, measured in nanoseconds from an arbitrary point
|
|
* in time.
|
|
* tstamp_enabled: the notional time when the event was enabled
|
|
* tstamp_running: the notional time when the event was scheduled on
|
|
* tstamp_stopped: in INACTIVE state, the notional time when the
|
|
* event was scheduled off.
|
|
*/
|
|
u64 tstamp_enabled;
|
|
u64 tstamp_running;
|
|
u64 tstamp_stopped;
|
|
|
|
struct perf_event_attr attr;
|
|
struct hw_perf_event hw;
|
|
|
|
struct perf_event_context *ctx;
|
|
struct file *filp;
|
|
|
|
/*
|
|
* These accumulate total time (in nanoseconds) that children
|
|
* events have been enabled and running, respectively.
|
|
*/
|
|
atomic64_t child_total_time_enabled;
|
|
atomic64_t child_total_time_running;
|
|
|
|
/*
|
|
* Protect attach/detach and child_list:
|
|
*/
|
|
struct mutex child_mutex;
|
|
struct list_head child_list;
|
|
struct perf_event *parent;
|
|
|
|
int oncpu;
|
|
int cpu;
|
|
|
|
struct list_head owner_entry;
|
|
struct task_struct *owner;
|
|
|
|
/* mmap bits */
|
|
struct mutex mmap_mutex;
|
|
atomic_t mmap_count;
|
|
struct perf_mmap_data *data;
|
|
|
|
/* poll related */
|
|
wait_queue_head_t waitq;
|
|
struct fasync_struct *fasync;
|
|
|
|
/* delayed work for NMIs and such */
|
|
int pending_wakeup;
|
|
int pending_kill;
|
|
int pending_disable;
|
|
struct perf_pending_entry pending;
|
|
|
|
atomic_t event_limit;
|
|
|
|
void (*destroy)(struct perf_event *);
|
|
struct rcu_head rcu_head;
|
|
|
|
struct pid_namespace *ns;
|
|
u64 id;
|
|
|
|
perf_overflow_handler_t overflow_handler;
|
|
|
|
#ifdef CONFIG_EVENT_TRACING
|
|
struct event_filter *filter;
|
|
#endif
|
|
|
|
#endif /* CONFIG_PERF_EVENTS */
|
|
};
|
|
|
|
/**
|
|
* struct perf_event_context - event context structure
|
|
*
|
|
* Used as a container for task events and CPU events as well:
|
|
*/
|
|
struct perf_event_context {
|
|
/*
|
|
* Protect the states of the events in the list,
|
|
* nr_active, and the list:
|
|
*/
|
|
raw_spinlock_t lock;
|
|
/*
|
|
* Protect the list of events. Locking either mutex or lock
|
|
* is sufficient to ensure the list doesn't change; to change
|
|
* the list you need to lock both the mutex and the spinlock.
|
|
*/
|
|
struct mutex mutex;
|
|
|
|
struct list_head pinned_groups;
|
|
struct list_head flexible_groups;
|
|
struct list_head event_list;
|
|
int nr_events;
|
|
int nr_active;
|
|
int is_active;
|
|
int nr_stat;
|
|
atomic_t refcount;
|
|
struct task_struct *task;
|
|
|
|
/*
|
|
* Context clock, runs when context enabled.
|
|
*/
|
|
u64 time;
|
|
u64 timestamp;
|
|
|
|
/*
|
|
* These fields let us detect when two contexts have both
|
|
* been cloned (inherited) from a common ancestor.
|
|
*/
|
|
struct perf_event_context *parent_ctx;
|
|
u64 parent_gen;
|
|
u64 generation;
|
|
int pin_count;
|
|
struct rcu_head rcu_head;
|
|
};
|
|
|
|
/**
|
|
* struct perf_event_cpu_context - per cpu event context structure
|
|
*/
|
|
struct perf_cpu_context {
|
|
struct perf_event_context ctx;
|
|
struct perf_event_context *task_ctx;
|
|
int active_oncpu;
|
|
int max_pertask;
|
|
int exclusive;
|
|
|
|
/*
|
|
* Recursion avoidance:
|
|
*
|
|
* task, softirq, irq, nmi context
|
|
*/
|
|
int recursion[4];
|
|
};
|
|
|
|
struct perf_output_handle {
|
|
struct perf_event *event;
|
|
struct perf_mmap_data *data;
|
|
unsigned long head;
|
|
unsigned long offset;
|
|
int nmi;
|
|
int sample;
|
|
int locked;
|
|
};
|
|
|
|
#ifdef CONFIG_PERF_EVENTS
|
|
|
|
/*
|
|
* Set by architecture code:
|
|
*/
|
|
extern int perf_max_events;
|
|
|
|
extern const struct pmu *hw_perf_event_init(struct perf_event *event);
|
|
|
|
extern void perf_event_task_sched_in(struct task_struct *task);
|
|
extern void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
|
|
extern void perf_event_task_tick(struct task_struct *task);
|
|
extern int perf_event_init_task(struct task_struct *child);
|
|
extern void perf_event_exit_task(struct task_struct *child);
|
|
extern void perf_event_free_task(struct task_struct *task);
|
|
extern void set_perf_event_pending(void);
|
|
extern void perf_event_do_pending(void);
|
|
extern void perf_event_print_debug(void);
|
|
extern void __perf_disable(void);
|
|
extern bool __perf_enable(void);
|
|
extern void perf_disable(void);
|
|
extern void perf_enable(void);
|
|
extern int perf_event_task_disable(void);
|
|
extern int perf_event_task_enable(void);
|
|
extern int hw_perf_group_sched_in(struct perf_event *group_leader,
|
|
struct perf_cpu_context *cpuctx,
|
|
struct perf_event_context *ctx, int cpu);
|
|
extern void perf_event_update_userpage(struct perf_event *event);
|
|
extern int perf_event_release_kernel(struct perf_event *event);
|
|
extern struct perf_event *
|
|
perf_event_create_kernel_counter(struct perf_event_attr *attr,
|
|
int cpu,
|
|
pid_t pid,
|
|
perf_overflow_handler_t callback);
|
|
extern u64 perf_event_read_value(struct perf_event *event,
|
|
u64 *enabled, u64 *running);
|
|
|
|
struct perf_sample_data {
|
|
u64 type;
|
|
|
|
u64 ip;
|
|
struct {
|
|
u32 pid;
|
|
u32 tid;
|
|
} tid_entry;
|
|
u64 time;
|
|
u64 addr;
|
|
u64 id;
|
|
u64 stream_id;
|
|
struct {
|
|
u32 cpu;
|
|
u32 reserved;
|
|
} cpu_entry;
|
|
u64 period;
|
|
struct perf_callchain_entry *callchain;
|
|
struct perf_raw_record *raw;
|
|
};
|
|
|
|
extern void perf_output_sample(struct perf_output_handle *handle,
|
|
struct perf_event_header *header,
|
|
struct perf_sample_data *data,
|
|
struct perf_event *event);
|
|
extern void perf_prepare_sample(struct perf_event_header *header,
|
|
struct perf_sample_data *data,
|
|
struct perf_event *event,
|
|
struct pt_regs *regs);
|
|
|
|
extern int perf_event_overflow(struct perf_event *event, int nmi,
|
|
struct perf_sample_data *data,
|
|
struct pt_regs *regs);
|
|
|
|
/*
|
|
* Return 1 for a software event, 0 for a hardware event
|
|
*/
|
|
static inline int is_software_event(struct perf_event *event)
|
|
{
|
|
switch (event->attr.type) {
|
|
case PERF_TYPE_SOFTWARE:
|
|
case PERF_TYPE_TRACEPOINT:
|
|
/* for now the breakpoint stuff also works as software event */
|
|
case PERF_TYPE_BREAKPOINT:
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
|
|
|
|
extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
|
|
|
|
static inline void
|
|
perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
|
|
{
|
|
if (atomic_read(&perf_swevent_enabled[event_id]))
|
|
__perf_sw_event(event_id, nr, nmi, regs, addr);
|
|
}
|
|
|
|
extern void __perf_event_mmap(struct vm_area_struct *vma);
|
|
|
|
static inline void perf_event_mmap(struct vm_area_struct *vma)
|
|
{
|
|
if (vma->vm_flags & VM_EXEC)
|
|
__perf_event_mmap(vma);
|
|
}
|
|
|
|
extern void perf_event_comm(struct task_struct *tsk);
|
|
extern void perf_event_fork(struct task_struct *tsk);
|
|
|
|
extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
|
|
|
|
extern int sysctl_perf_event_paranoid;
|
|
extern int sysctl_perf_event_mlock;
|
|
extern int sysctl_perf_event_sample_rate;
|
|
|
|
extern void perf_event_init(void);
|
|
extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record, int entry_size);
|
|
extern void perf_bp_event(struct perf_event *event, void *data);
|
|
|
|
#ifndef perf_misc_flags
|
|
#define perf_misc_flags(regs) (user_mode(regs) ? PERF_RECORD_MISC_USER : \
|
|
PERF_RECORD_MISC_KERNEL)
|
|
#define perf_instruction_pointer(regs) instruction_pointer(regs)
|
|
#endif
|
|
|
|
extern int perf_output_begin(struct perf_output_handle *handle,
|
|
struct perf_event *event, unsigned int size,
|
|
int nmi, int sample);
|
|
extern void perf_output_end(struct perf_output_handle *handle);
|
|
extern void perf_output_copy(struct perf_output_handle *handle,
|
|
const void *buf, unsigned int len);
|
|
extern int perf_swevent_get_recursion_context(void);
|
|
extern void perf_swevent_put_recursion_context(int rctx);
|
|
extern void perf_event_enable(struct perf_event *event);
|
|
extern void perf_event_disable(struct perf_event *event);
|
|
#else
|
|
static inline void
|
|
perf_event_task_sched_in(struct task_struct *task) { }
|
|
static inline void
|
|
perf_event_task_sched_out(struct task_struct *task,
|
|
struct task_struct *next) { }
|
|
static inline void
|
|
perf_event_task_tick(struct task_struct *task) { }
|
|
static inline int perf_event_init_task(struct task_struct *child) { return 0; }
|
|
static inline void perf_event_exit_task(struct task_struct *child) { }
|
|
static inline void perf_event_free_task(struct task_struct *task) { }
|
|
static inline void perf_event_do_pending(void) { }
|
|
static inline void perf_event_print_debug(void) { }
|
|
static inline void perf_disable(void) { }
|
|
static inline void perf_enable(void) { }
|
|
static inline int perf_event_task_disable(void) { return -EINVAL; }
|
|
static inline int perf_event_task_enable(void) { return -EINVAL; }
|
|
|
|
static inline void
|
|
perf_sw_event(u32 event_id, u64 nr, int nmi,
|
|
struct pt_regs *regs, u64 addr) { }
|
|
static inline void
|
|
perf_bp_event(struct perf_event *event, void *data) { }
|
|
|
|
static inline void perf_event_mmap(struct vm_area_struct *vma) { }
|
|
static inline void perf_event_comm(struct task_struct *tsk) { }
|
|
static inline void perf_event_fork(struct task_struct *tsk) { }
|
|
static inline void perf_event_init(void) { }
|
|
static inline int perf_swevent_get_recursion_context(void) { return -1; }
|
|
static inline void perf_swevent_put_recursion_context(int rctx) { }
|
|
static inline void perf_event_enable(struct perf_event *event) { }
|
|
static inline void perf_event_disable(struct perf_event *event) { }
|
|
#endif
|
|
|
|
#define perf_output_put(handle, x) \
|
|
perf_output_copy((handle), &(x), sizeof(x))
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _LINUX_PERF_EVENT_H */
|