cregit-Linux how code gets into the kernel

Release 4.15 include/linux/perf_event.h

Directory: include/linux
/*
 * Performance events:
 *
 *    Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
 *    Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar
 *    Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra
 *
 * Data type definitions, declarations, prototypes.
 *
 *    Started by: Thomas Gleixner and Ingo Molnar
 *
 * For licencing details see kernel-base/COPYING
 */
#ifndef _LINUX_PERF_EVENT_H

#define _LINUX_PERF_EVENT_H

#include <uapi/linux/perf_event.h>
#include <uapi/linux/bpf_perf_event.h>

/*
 * Kernel-internal data types and definitions:
 */

#ifdef CONFIG_PERF_EVENTS
# include <asm/perf_event.h>
# include <asm/local64.h>
#endif


struct perf_guest_info_callbacks {
	
int				(*is_in_guest)(void);
	
int				(*is_user_mode)(void);
	
unsigned long			(*get_guest_ip)(void);
};

#ifdef CONFIG_HAVE_HW_BREAKPOINT
#include <asm/hw_breakpoint.h>
#endif

#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/spinlock.h>
#include <linux/hrtimer.h>
#include <linux/fs.h>
#include <linux/pid_namespace.h>
#include <linux/workqueue.h>
#include <linux/ftrace.h>
#include <linux/cpu.h>
#include <linux/irq_work.h>
#include <linux/static_key.h>
#include <linux/jump_label_ratelimit.h>
#include <linux/atomic.h>
#include <linux/sysfs.h>
#include <linux/perf_regs.h>
#include <linux/workqueue.h>
#include <linux/cgroup.h>
#include <asm/local.h>


struct perf_callchain_entry {
	
__u64				nr;
	
__u64				ip[0]; /* /proc/sys/kernel/perf_event_max_stack */
};


struct perf_callchain_entry_ctx {
	
struct perf_callchain_entry *entry;
	
u32			    max_stack;
	
u32			    nr;
	
short			    contexts;
	
bool			    contexts_maxed;
};


typedef unsigned long (*perf_copy_f)(void *dst, const void *src,
				     unsigned long off, unsigned long len);


struct perf_raw_frag {
	union {
		
struct perf_raw_frag	*next;
		
unsigned long		pad;
	};
	
perf_copy_f			copy;
	
void				*data;
	
u32				size;

} __packed;


struct perf_raw_record {
	
struct perf_raw_frag		frag;
	
u32				size;
};

/*
 * branch stack layout:
 *  nr: number of taken branches stored in entries[]
 *
 * Note that nr can vary from sample to sample
 * branches (to, from) are stored from most recent
 * to least recent, i.e., entries[0] contains the most
 * recent branch.
 */

struct perf_branch_stack {
	
__u64				nr;
	
struct perf_branch_entry	entries[0];
};

struct task_struct;

/*
 * extra PMU register associated with an event
 */

struct hw_perf_event_extra {
	
u64		config;	/* register value */
	
unsigned int	reg;	/* register address or index */
	
int		alloc;	/* extra register already allocated */
	
int		idx;	/* index in shared_regs->regs[] */
};

/**
 * struct hw_perf_event - performance event hardware details:
 */

struct hw_perf_event {
#ifdef CONFIG_PERF_EVENTS
	union {
		struct { /* hardware */
			
u64		config;
			
u64		last_tag;
			
unsigned long	config_base;
			
unsigned long	event_base;
			
int		event_base_rdpmc;
			
int		idx;
			
int		last_cpu;
			
int		flags;

			
struct hw_perf_event_extra extra_reg;
			
struct hw_perf_event_extra branch_reg;
		};
		struct { /* software */
			
struct hrtimer	hrtimer;
		};
		struct { /* tracepoint */
			/* for tp_event->class */
			
struct list_head	tp_list;
		};
		struct { /* amd_power */
			
u64	pwr_acc;
			
u64	ptsc;
		};
#ifdef CONFIG_HAVE_HW_BREAKPOINT
		struct { /* breakpoint */
			/*
                         * Crufty hack to avoid the chicken and egg
                         * problem hw_breakpoint has with context
                         * creation and event initalization.
                         */
			
struct arch_hw_breakpoint	info;
			
struct list_head		bp_list;
		};
#endif
		struct { /* amd_iommu */
			
u8	iommu_bank;
			
u8	iommu_cntr;
			
u16	padding;
			
u64	conf;
			
u64	conf1;
		};
	};
	/*
         * If the event is a per task event, this will point to the task in
         * question. See the comment in perf_event_alloc().
         */
	
struct task_struct		*target;

	/*
         * PMU would store hardware filter configuration
         * here.
         */
	
void				*addr_filters;

	/* Last sync'ed generation of filters */
	
unsigned long			addr_filters_gen;

/*
 * hw_perf_event::state flags; used to track the PERF_EF_* state.
 */

#define PERF_HES_STOPPED	0x01 /* the counter is stopped */

#define PERF_HES_UPTODATE	0x02 /* event->count up-to-date */

#define PERF_HES_ARCH		0x04

	
int				state;

	/*
         * The last observed hardware counter value, updated with a
         * local64_cmpxchg() such that pmu::read() can be called nested.
         */
	
local64_t			prev_count;

	/*
         * The period to start the next sample with.
         */
	
u64				sample_period;

	/*
         * The period we started this sample with.
         */
	
u64				last_period;

	/*
         * However much is left of the current period; note that this is
         * a full 64bit value and allows for generation of periods longer
         * than hardware might allow.
         */
	
local64_t			period_left;

	/*
         * State for throttling the event, see __perf_event_overflow() and
         * perf_adjust_freq_unthr_context().
         */
	
u64                             interrupts_seq;
	
u64				interrupts;

	/*
         * State for freq target events, see __perf_event_overflow() and
         * perf_adjust_freq_unthr_context().
         */
	
u64				freq_time_stamp;
	
u64				freq_count_stamp;
#endif
};

struct perf_event;

/*
 * Common implementation detail of pmu::{start,commit,cancel}_txn
 */

#define PERF_PMU_TXN_ADD  0x1		
/* txn to add/schedule event on PMU */

#define PERF_PMU_TXN_READ 0x2		
/* txn to read event group from PMU */

/**
 * pmu::capabilities flags
 */

#define PERF_PMU_CAP_NO_INTERRUPT		0x01

#define PERF_PMU_CAP_NO_NMI			0x02

#define PERF_PMU_CAP_AUX_NO_SG			0x04

#define PERF_PMU_CAP_AUX_SW_DOUBLEBUF		0x08

#define PERF_PMU_CAP_EXCLUSIVE			0x10

#define PERF_PMU_CAP_ITRACE			0x20

#define PERF_PMU_CAP_HETEROGENEOUS_CPUS		0x40

/**
 * struct pmu - generic performance monitoring unit
 */

struct pmu {
	
struct list_head		entry;

	
struct module			*module;
	
struct device			*dev;
	
const struct attribute_group	**attr_groups;
	
const char			*name;
	
int				type;

	/*
         * various common per-pmu feature flags
         */
	
int				capabilities;

	
int * __percpu			pmu_disable_count;
	
struct perf_cpu_context * __percpu pmu_cpu_context;
	
atomic_t			exclusive_cnt; /* < 0: cpu; > 0: tsk */
	
int				task_ctx_nr;
	
int				hrtimer_interval_ms;

	/* number of address filters this PMU can do */
	
unsigned int			nr_addr_filters;

	/*
         * Fully disable/enable this PMU, can be used to protect from the PMI
         * as well as for lazy/batch writing of the MSRs.
         */
	
void (*pmu_enable)		(struct pmu *pmu); /* optional */
	
void (*pmu_disable)		(struct pmu *pmu); /* optional */

	/*
         * Try and initialize the event for this PMU.
         *
         * Returns:
         *  -ENOENT     -- @event is not for this PMU
         *
         *  -ENODEV     -- @event is for this PMU but PMU not present
         *  -EBUSY      -- @event is for this PMU but PMU temporarily unavailable
         *  -EINVAL     -- @event is for this PMU but @event is not valid
         *  -EOPNOTSUPP -- @event is for this PMU, @event is valid, but not supported
         *  -EACCESS    -- @event is for this PMU, @event is valid, but no privilidges
         *
         *  0           -- @event is for this PMU and valid
         *
         * Other error return values are allowed.
         */
	
int (*event_init)		(struct perf_event *event);

	/*
         * Notification that the event was mapped or unmapped.  Called
         * in the context of the mapping task.
         */
	
void (*event_mapped)		(struct perf_event *event, struct mm_struct *mm); /* optional */
	
void (*event_unmapped)		(struct perf_event *event, struct mm_struct *mm); /* optional */

	/*
         * Flags for ->add()/->del()/ ->start()/->stop(). There are
         * matching hw_perf_event::state flags.
         */

#define PERF_EF_START	0x01		/* start the counter when adding    */

#define PERF_EF_RELOAD	0x02		/* reload the counter when starting */

#define PERF_EF_UPDATE	0x04		/* update the counter when stopping */

	/*
         * Adds/Removes a counter to/from the PMU, can be done inside a
         * transaction, see the ->*_txn() methods.
         *
         * The add/del callbacks will reserve all hardware resources required
         * to service the event, this includes any counter constraint
         * scheduling etc.
         *
         * Called with IRQs disabled and the PMU disabled on the CPU the event
         * is on.
         *
         * ->add() called without PERF_EF_START should result in the same state
         *  as ->add() followed by ->stop().
         *
         * ->del() must always PERF_EF_UPDATE stop an event. If it calls
         *  ->stop() that must deal with already being stopped without
         *  PERF_EF_UPDATE.
         */
	
int  (*add)			(struct perf_event *event, int flags);
	
void (*del)			(struct perf_event *event, int flags);

	/*
         * Starts/Stops a counter present on the PMU.
         *
         * The PMI handler should stop the counter when perf_event_overflow()
         * returns !0. ->start() will be used to continue.
         *
         * Also used to change the sample period.
         *
         * Called with IRQs disabled and the PMU disabled on the CPU the event
         * is on -- will be called from NMI context with the PMU generates
         * NMIs.
         *
         * ->stop() with PERF_EF_UPDATE will read the counter and update
         *  period/count values like ->read() would.
         *
         * ->start() with PERF_EF_RELOAD will reprogram the the counter
         *  value, must be preceded by a ->stop() with PERF_EF_UPDATE.
         */
	
void (*start)			(struct perf_event *event, int flags);
	
void (*stop)			(struct perf_event *event, int flags);

	/*
         * Updates the counter value of the event.
         *
         * For sampling capable PMUs this will also update the software period
         * hw_perf_event::period_left field.
         */
	
void (*read)			(struct perf_event *event);

	/*
         * Group events scheduling is treated as a transaction, add
         * group events as a whole and perform one schedulability test.
         * If the test fails, roll back the whole group
         *
         * Start the transaction, after this ->add() doesn't need to
         * do schedulability tests.
         *
         * Optional.
         */
	
void (*start_txn)		(struct pmu *pmu, unsigned int txn_flags);
	/*
         * If ->start_txn() disabled the ->add() schedulability test
         * then ->commit_txn() is required to perform one. On success
         * the transaction is closed. On error the transaction is kept
         * open until ->cancel_txn() is called.
         *
         * Optional.
         */
	
int  (*commit_txn)		(struct pmu *pmu);
	/*
         * Will cancel the transaction, assumes ->del() is called
         * for each successful ->add() during the transaction.
         *
         * Optional.
         */
	
void (*cancel_txn)		(struct pmu *pmu);

	/*
         * Will return the value for perf_event_mmap_page::index for this event,
         * if no implementation is provided it will default to: event->hw.idx + 1.
         */
	
int (*event_idx)		(struct perf_event *event); /*optional */

	/*
         * context-switches callback
         */
	
void (*sched_task)		(struct perf_event_context *ctx,
					bool sched_in);
	/*
         * PMU specific data size
         */
	
size_t				task_ctx_size;


	/*
         * Set up pmu-private data structures for an AUX area
         */
	
void *(*setup_aux)		(int cpu, void **pages,
					 int nr_pages, bool overwrite);
					/* optional */

	/*
         * Free pmu-private AUX data structures
         */
	
void (*free_aux)		(void *aux); /* optional */

	/*
         * Validate address range filters: make sure the HW supports the
         * requested configuration and number of filters; return 0 if the
         * supplied filters are valid, -errno otherwise.
         *
         * Runs in the context of the ioctl()ing process and is not serialized
         * with the rest of the PMU callbacks.
         */
	
int (*addr_filters_validate)	(struct list_head *filters);
					/* optional */

	/*
         * Synchronize address range filter configuration:
         * translate hw-agnostic filters into hardware configuration in
         * event::hw::addr_filters.
         *
         * Runs as a part of filter sync sequence that is done in ->start()
         * callback by calling perf_event_addr_filters_sync().
         *
         * May (and should) traverse event::addr_filters::list, for which its
         * caller provides necessary serialization.
         */
	
void (*addr_filters_sync)	(struct perf_event *event);
					/* optional */

	/*
         * Filter events for PMU-specific reasons.
         */
	
int (*filter_match)		(struct perf_event *event); /* optional */
};

/**
 * struct perf_addr_filter - address range filter definition
 * @entry:      event's filter list linkage
 * @inode:      object file's inode for file-based filters
 * @offset:     filter range offset
 * @size:       filter range size
 * @range:      1: range, 0: address
 * @filter:     1: filter/start, 0: stop
 *
 * This is a hardware-agnostic filter configuration as specified by the user.
 */

struct perf_addr_filter {
	
struct list_head	entry;
	
struct inode		*inode;
	
unsigned long		offset;
	
unsigned long		size;
	
unsigned int		range	: 1,
				
filter	: 1;
};

/**
 * struct perf_addr_filters_head - container for address range filters
 * @list:       list of filters for this event
 * @lock:       spinlock that serializes accesses to the @list and event's
 *              (and its children's) filter generations.
 * @nr_file_filters:    number of file-based filters
 *
 * A child event will use parent's @list (and therefore @lock), so they are
 * bundled together; see perf_event_addr_filters().
 */

struct perf_addr_filters_head {
	
struct list_head	list;
	
raw_spinlock_t		lock;
	
unsigned int		nr_file_filters;
};

/**
 * enum perf_event_state - the states of a event
 */

enum perf_event_state {
	
PERF_EVENT_STATE_DEAD		= -4,
	
PERF_EVENT_STATE_EXIT		= -3,
	
PERF_EVENT_STATE_ERROR		= -2,
	
PERF_EVENT_STATE_OFF		= -1,
	
PERF_EVENT_STATE_INACTIVE	=  0,
	
PERF_EVENT_STATE_ACTIVE		=  1,
};

struct file;
struct perf_sample_data;


typedef void (*perf_overflow_handler_t)(struct perf_event *,
					struct perf_sample_data *,
					struct pt_regs *regs);

/*
 * Event capabilities. For event_caps and groups caps.
 *
 * PERF_EV_CAP_SOFTWARE: Is a software event.
 * PERF_EV_CAP_READ_ACTIVE_PKG: A CPU event (or cgroup event) that can be read
 * from any CPU in the package where it is active.
 */

#define PERF_EV_CAP_SOFTWARE		BIT(0)

#define PERF_EV_CAP_READ_ACTIVE_PKG	BIT(1)


#define SWEVENT_HLIST_BITS		8

#define SWEVENT_HLIST_SIZE		(1 << SWEVENT_HLIST_BITS)


struct swevent_hlist {
	
struct hlist_head		heads[SWEVENT_HLIST_SIZE];
	
struct rcu_head			rcu_head;
};


#define PERF_ATTACH_CONTEXT	0x01

#define PERF_ATTACH_GROUP	0x02

#define PERF_ATTACH_TASK	0x04

#define PERF_ATTACH_TASK_DATA	0x08

#define PERF_ATTACH_ITRACE	0x10

struct perf_cgroup;
struct ring_buffer;


struct pmu_event_list {
	
raw_spinlock_t		lock;
	
struct list_head	list;
};

/**
 * struct perf_event - performance event kernel representation:
 */

struct perf_event {
#ifdef CONFIG_PERF_EVENTS
	/*
         * entry onto perf_event_context::event_list;
         *   modifications require ctx->lock
         *   RCU safe iterations.
         */
	
struct list_head		event_entry;

	/*
         * XXX: group_entry and sibling_list should be mutually exclusive;
         * either you're a sibling on a group, or you're the group leader.
         * Rework the code to always use the same list element.
         *
         * Locked for modification by both ctx->mutex and ctx->lock; holding
         * either sufficies for read.
         */
	
struct list_head		group_entry;
	
struct list_head		sibling_list;

	/*
         * We need storage to track the entries in perf_pmu_migrate_context; we
         * cannot use the event_entry because of RCU and we want to keep the
         * group in tact which avoids us using the other two entries.
         */
	
struct list_head		migrate_entry;

	
struct hlist_node		hlist_entry;
	
struct list_head		active_entry;
	
int				nr_siblings;

	/* Not serialized. Only written during event initialization. */
	
int				event_caps;
	/* The cumulative AND of all event_caps for events in this group. */
	
int				group_caps;

	
struct perf_event		*group_leader;
	
struct pmu			*pmu;
	
void				*pmu_private;

	
enum perf_event_state		state;
	
unsigned int			attach_state;
	
local64_t			count;
	
atomic64_t			child_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.
         */
	
u64				total_time_enabled;
	
u64				total_time_running;
	
u64				tstamp;

	/*
         * timestamp shadows the actual context timing but it can
         * be safely used in NMI interrupt context. It reflects the
         * context time as it was when the event was last scheduled in.
         *
         * ctx_time already accounts for ctx->timestamp. Therefore to
         * compute ctx_time for a sample, simply add perf_clock().
         */
	
u64				shadow_ctx_time;

	
struct perf_event_attr		attr;
	
u16				header_size;
	
u16				id_header_size;
	
u16				read_size;
	
struct hw_perf_event		hw;

	
struct perf_event_context	*ctx;
	
atomic_long_t			refcount;

	/*
         * 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 ring_buffer		*rb;
	
struct list_head		rb_entry;
	
unsigned long			rcu_batches;
	
int				rcu_pending;

	/* 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 irq_work			pending;

	
atomic_t			event_limit;

	/* address range filters */
	
struct perf_addr_filters_head	addr_filters;
	/* vma address array for file-based filders */
	
unsigned long			*addr_filters_offs;
	
unsigned long			addr_filters_gen;

	
void (*destroy)(struct perf_event *);
	
struct rcu_head			rcu_head;

	
struct pid_namespace		*ns;
	
u64				id;

	
u64				(*clock)(void);
	
perf_overflow_handler_t		overflow_handler;
	
void				*overflow_handler_context;
#ifdef CONFIG_BPF_SYSCALL
	
perf_overflow_handler_t		orig_overflow_handler;
	
struct bpf_prog			*prog;
#endif

#ifdef CONFIG_EVENT_TRACING
	
struct trace_event_call		*tp_event;
	
struct event_filter		*filter;
#ifdef CONFIG_FUNCTION_TRACER
	
struct ftrace_ops               ftrace_ops;
#endif
#endif

#ifdef CONFIG_CGROUP_PERF
	
struct perf_cgroup		*cgrp; /* cgroup event is attach to */
#endif

	
struct list_head		sb_list;
#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 {
	
struct pmu			*pmu;
	/*
         * 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		active_ctx_list;
	
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;
	
int				nr_freq;
	
int				rotate_disable;
	
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;
#ifdef CONFIG_CGROUP_PERF
	
int				nr_cgroups;	 /* cgroup evts */
#endif
	
void				*task_ctx_data; /* pmu specific data */
	
struct rcu_head			rcu_head;
};

/*
 * Number of contexts where an event can trigger:
 *      task, softirq, hardirq, nmi.
 */

#define PERF_NR_CONTEXTS	4

/**
 * 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				exclusive;

	
raw_spinlock_t			hrtimer_lock;
	
struct hrtimer			hrtimer;
	
ktime_t				hrtimer_interval;
	
unsigned int			hrtimer_active;

#ifdef CONFIG_CGROUP_PERF
	
struct perf_cgroup		*cgrp;
	
struct list_head		cgrp_cpuctx_entry;
#endif

	
struct list_head		sched_cb_entry;
	
int				sched_cb_usage;

	
int				online;
};


struct perf_output_handle {
	
struct perf_event		*event;
	
struct ring_buffer		*rb;
	
unsigned long			wakeup;
	
unsigned long			size;
	
u64				aux_flags;
	union {
		
void			*addr;
		
unsigned long		head;
	};
	
int				page;
};


struct bpf_perf_event_data_kern {
	
bpf_user_pt_regs_t *regs;
	
struct perf_sample_data *data;
	
struct perf_event *event;
};

#ifdef CONFIG_CGROUP_PERF

/*
 * perf_cgroup_info keeps track of time_enabled for a cgroup.
 * This is a per-cpu dynamically allocated data structure.
 */

struct perf_cgroup_info {
	
u64				time;
	
u64				timestamp;
};


struct perf_cgroup {
	
struct cgroup_subsys_state	css;
	
struct perf_cgroup_info	__percpu *info;
};

/*
 * Must ensure cgroup is pinned (css_get) before calling
 * this function. In other words, we cannot call this function
 * if there is no cgroup event for the current CPU context.
 */


static inline struct perf_cgroup *

perf_cgroup_from_task(struct task_struct *task, struct perf_event_context *ctx)
{
	return container_of(task_css_check(task, perf_event_cgrp_id,
					   ctx ? lockdep_is_held(&ctx->lock)
					       : true),
			    struct perf_cgroup, css);
}

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#endif /* CONFIG_CGROUP_PERF */

#ifdef CONFIG_PERF_EVENTS

extern void *perf_aux_output_begin(struct perf_output_handle *handle,
				   struct perf_event *event);
extern void perf_aux_output_end(struct perf_output_handle *handle,
				unsigned long size);
extern int perf_aux_output_skip(struct perf_output_handle *handle,
				unsigned long size);
extern void *perf_get_aux(struct perf_output_handle *handle);
extern void perf_aux_output_flag(struct perf_output_handle *handle, u64 flags);
extern void perf_event_itrace_started(struct perf_event *event);

extern int perf_pmu_register(struct pmu *pmu, const char *name, int type);
extern void perf_pmu_unregister(struct pmu *pmu);

extern int perf_num_counters(void);
extern const char *perf_pmu_name(void);
extern void __perf_event_task_sched_in(struct task_struct *prev,
				       struct task_struct *task);
extern void __perf_event_task_sched_out(struct task_struct *prev,
					struct task_struct *next);
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 perf_event_delayed_put(struct task_struct *task);
extern struct file *perf_event_get(unsigned int fd);
extern const struct perf_event_attr *perf_event_attrs(struct perf_event *event);
extern void perf_event_print_debug(void);
extern void perf_pmu_disable(struct pmu *pmu);
extern void perf_pmu_enable(struct pmu *pmu);
extern void perf_sched_cb_dec(struct pmu *pmu);
extern void perf_sched_cb_inc(struct pmu *pmu);
extern int perf_event_task_disable(void);
extern int perf_event_task_enable(void);
extern int perf_event_refresh(struct perf_event *event, int refresh);
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,
				struct task_struct *task,
				perf_overflow_handler_t callback,
				void *context);
extern void perf_pmu_migrate_context(struct pmu *pmu,
				int src_cpu, int dst_cpu);
int perf_event_read_local(struct perf_event *event, u64 *value,
			  u64 *enabled, u64 *running);
extern u64 perf_event_read_value(struct perf_event *event,
				 u64 *enabled, u64 *running);



struct perf_sample_data {
	/*
         * Fields set by perf_sample_data_init(), group so as to
         * minimize the cachelines touched.
         */
	
u64				addr;
	
struct perf_raw_record		*raw;
	
struct perf_branch_stack	*br_stack;
	
u64				period;
	
u64				weight;
	
u64				txn;
	
union  perf_mem_data_src	data_src;

	/*
         * The other fields, optionally {set,used} by
         * perf_{prepare,output}_sample().
         */
	
u64				type;
	
u64				ip;
	struct {
		
u32	pid;
		
u32	tid;
	
}				tid_entry;
	
u64				time;
	
u64				id;
	
u64				stream_id;
	struct {
		
u32	cpu;
		
u32	reserved;
	
}				cpu_entry;
	
struct perf_callchain_entry	*callchain;

	/*
         * regs_user may point to task_pt_regs or to regs_user_copy, depending
         * on arch details.
         */
	
struct perf_regs		regs_user;
	
struct pt_regs			regs_user_copy;

	
struct perf_regs		regs_intr;
	
u64				stack_user_size;

	
u64				phys_addr;

} ____cacheline_aligned;

/* default value for data source */

#define PERF_MEM_NA (PERF_MEM_S(OP, NA)   |\
                    PERF_MEM_S(LVL, NA)   |\
                    PERF_MEM_S(SNOOP, NA) |\
                    PERF_MEM_S(LOCK, NA)  |\
                    PERF_MEM_S(TLB, NA))




static inline void perf_sample_data_init(struct perf_sample_data *data,
					 u64 addr, u64 period)
{
	/* remaining struct members initialized in perf_prepare_sample() */
	data->addr = addr;
	data->raw  = NULL;
	data->br_stack = NULL;
	data->period = period;
	data->weight = 0;
	data->data_src.val = PERF_MEM_NA;
	data->txn = 0;
}


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Peter Zijlstra2742.86%112.50%


Stéphane Eranian1422.22%337.50%


Robert Richter1015.87%112.50%


Andi Kleen1015.87%225.00%


Jiri Olsa23.17%112.50%


Total63100.00%8100.00%



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,
				 struct perf_sample_data *data,
				 struct pt_regs *regs);

extern void perf_event_output_forward(struct perf_event *event,
				     struct perf_sample_data *data,
				     struct pt_regs *regs);
extern void perf_event_output_backward(struct perf_event *event,
				       struct perf_sample_data *data,
				       struct pt_regs *regs);
extern void perf_event_output(struct perf_event *event,
			      struct perf_sample_data *data,
			      struct pt_regs *regs);



static inline bool

is_default_overflow_handler(struct perf_event *event)
{
	if (likely(event->overflow_handler == perf_event_output_forward))
		return true;
	if (unlikely(event->overflow_handler == perf_event_output_backward))
		return true;
	return false;
}


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Total43100.00%2100.00%



extern void
perf_event_header__init_id(struct perf_event_header *header,
			   struct perf_sample_data *data,
			   struct perf_event *event);
extern void
perf_event__output_id_sample(struct perf_event *event,
			     struct perf_output_handle *handle,
			     struct perf_sample_data *sample);

extern void
perf_log_lost_samples(struct perf_event *event, u64 lost);




static inline bool is_sampling_event(struct perf_event *event)
{
	return event->attr.sample_period != 0;
}


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Total21100.00%1100.00%



/*
 * Return 1 for a software event, 0 for a hardware event
 */



static inline int is_software_event(struct perf_event *event)
{
	return event->event_caps & PERF_EV_CAP_SOFTWARE;
}


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Ingo Molnar421.05%120.00%


David Carrillo-Cisneros315.79%120.00%


Peter Zijlstra210.53%240.00%


Total19100.00%5100.00%



extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];

extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64);
extern void __perf_sw_event(u32, u64, struct pt_regs *, u64);

#ifndef perf_arch_fetch_caller_regs



static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }

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Nobuhiro Iwamatsu16.67%125.00%


Peter Zijlstra16.67%125.00%


Total15100.00%4100.00%



#endif

/*
 * Take a snapshot of the regs. Skip ip and frame pointer to
 * the nth caller. We only need a few of the regs:
 * - ip for PERF_SAMPLE_IP
 * - cs for user_mode() tests
 * - bp for callchains
 * - eflags, for future purposes, just in case
 */



static inline void perf_fetch_caller_regs(struct pt_regs *regs)
{
	perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
}


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static __always_inline void

perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)
{
	if (static_key_false(&perf_swevent_enabled[event_id]))
		__perf_sw_event(event_id, nr, regs, addr);
}


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Peter Zijlstra1330.23%240.00%


Jason Baron36.98%120.00%


Ingo Molnar12.33%120.00%


Total43100.00%5100.00%



DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]);

/*
 * 'Special' version for the scheduler, it hard assumes no recursion,
 * which is guaranteed by us not actually scheduling inside other swevents
 * because those disable preemption.
 */


static __always_inline void

perf_sw_event_sched(u32 event_id, u64 nr, u64 addr)
{
	if (static_key_false(&perf_swevent_enabled[event_id])) {
		struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);

		perf_fetch_caller_regs(regs);
		___perf_sw_event(event_id, nr, regs, addr);
	}
}


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Frédéric Weisbecker2033.90%133.33%


Jason Baron23.39%133.33%


Total59100.00%3100.00%



extern struct static_key_false perf_sched_events;



static __always_inline bool

perf_sw_migrate_enabled(void)
{
	if (static_key_false(&perf_swevent_enabled[PERF_COUNT_SW_CPU_MIGRATIONS]))
		return true;
	return false;
}


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static inline void perf_event_task_migrate(struct task_struct *task)
{
	if (perf_sw_migrate_enabled())
		task->sched_migrated = 1;
}


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static inline void perf_event_task_sched_in(struct task_struct *prev,
					    struct task_struct *task)
{
	if (static_branch_unlikely(&perf_sched_events))
		__perf_event_task_sched_in(prev, task);

	if (perf_sw_migrate_enabled() && task->sched_migrated) {
		struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);

		perf_fetch_caller_regs(regs);
		___perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, regs, 0);
		task->sched_migrated = 0;
	}
}


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Peter Zijlstra5873.42%360.00%


Jiri Olsa1620.25%120.00%


Stéphane Eranian56.33%120.00%


Total79100.00%5100.00%






static inline void perf_event_task_sched_out(struct task_struct *prev,
					     struct task_struct *next)
{
	perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0);

	if (static_branch_unlikely(&perf_sched_events))
		__perf_event_task_sched_out(prev, next);
}


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Jiri Olsa1843.90%120.00%


Peter Zijlstra1536.59%360.00%


Stéphane Eranian819.51%120.00%


Total41100.00%5100.00%



extern void perf_event_mmap(struct vm_area_struct *vma);
extern struct perf_guest_info_callbacks *perf_guest_cbs;
extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);

extern void perf_event_exec(void);
extern void perf_event_comm(struct task_struct *tsk, bool exec);
extern void perf_event_namespaces(struct task_struct *tsk);
extern void perf_event_fork(struct task_struct *tsk);

/* Callchains */
DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);

extern void perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
extern void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
extern struct perf_callchain_entry *
get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
		   u32 max_stack, bool crosstask, bool add_mark);
extern int get_callchain_buffers(int max_stack);
extern void put_callchain_buffers(void);

extern int sysctl_perf_event_max_stack;
extern int sysctl_perf_event_max_contexts_per_stack;




static inline int perf_callchain_store_context(struct perf_callchain_entry_ctx *ctx, u64 ip)
{
	if (ctx->contexts < sysctl_perf_event_max_contexts_per_stack) {
		struct perf_callchain_entry *entry = ctx->entry;
		entry->ip[entry->nr++] = ip;
		++ctx->contexts;
		return 0;
	} else {
		ctx->contexts_maxed = true;
		return -1; /* no more room, stop walking the stack */
	}
}


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static inline int perf_callchain_store(struct perf_callchain_entry_ctx *ctx, u64 ip)
{
	if (ctx->nr < ctx->max_stack && !ctx->contexts_maxed) {
		struct perf_callchain_entry *entry = ctx->entry;
		entry->ip[entry->nr++] = ip;
		++ctx->nr;
		return 0;
	} else {
		return -1; /* no more room, stop walking the stack */
	}
}


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Frédéric Weisbecker3043.48%120.00%


Arnaldo Carvalho de Melo2536.23%360.00%


Alexei Starovoitov1420.29%120.00%


Total69100.00%5100.00%



extern int sysctl_perf_event_paranoid;
extern int sysctl_perf_event_mlock;
extern int sysctl_perf_event_sample_rate;
extern int sysctl_perf_cpu_time_max_percent;

extern void perf_sample_event_took(u64 sample_len_ns);

extern int perf_proc_update_handler(struct ctl_table *table, int write,
		void __user *buffer, size_t *lenp,
		loff_t *ppos);
extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
		void __user *buffer, size_t *lenp,
		loff_t *ppos);

int perf_event_max_stack_handler(struct ctl_table *table, int write,
				 void __user *buffer, size_t *lenp, loff_t *ppos);




static inline bool perf_paranoid_tracepoint_raw(void)
{
	return sysctl_perf_event_paranoid > -1;
}


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static inline bool perf_paranoid_cpu(void)
{
	return sysctl_perf_event_paranoid > 0;
}


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static inline bool perf_paranoid_kernel(void)
{
	return sysctl_perf_event_paranoid > 1;
}


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Total14100.00%1100.00%



extern void perf_event_init(void);
extern void perf_tp_event(u16 event_type, u64 count, void *record,
			  int entry_size, struct pt_regs *regs,
			  struct hlist_head *head, int rctx,
			  struct task_struct *task);
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
#ifndef perf_arch_bpf_user_pt_regs

# define perf_arch_bpf_user_pt_regs(regs) regs
#endif




static inline bool has_branch_stack(struct perf_event *event)
{
	return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK;
}


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static inline bool needs_branch_stack(struct perf_event *event)
{
	return event->attr.branch_sample_type != 0;
}


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Total21100.00%1100.00%






static inline bool has_aux(struct perf_event *event)
{
	return event->pmu->setup_aux;
}


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Peter Zijlstra19100.00%1100.00%


Total19100.00%1100.00%






static inline bool is_write_backward(struct perf_event *event)
{
	return !!event->attr.write_backward;
}


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static inline bool has_addr_filter(struct perf_event *event)
{
	return event->pmu->nr_addr_filters;
}


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Total19100.00%1100.00%



/*
 * An inherited event uses parent's filters
 */


static inline struct perf_addr_filters_head *

perf_event_addr_filters(struct perf_event *event)
{
	struct perf_addr_filters_head *ifh = &event->addr_filters;

	if (event->parent)
		ifh = &event->parent->addr_filters;

	return ifh;
}


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Total42100.00%1100.00%



extern void perf_event_addr_filters_sync(struct perf_event *event);

extern int perf_output_begin(struct perf_output_handle *handle,
			     struct perf_event *event, unsigned int size);
extern int perf_output_begin_forward(struct perf_output_handle *handle,
				    struct perf_event *event,
				    unsigned int size);
extern int perf_output_begin_backward(struct perf_output_handle *handle,
				      struct perf_event *event,
				      unsigned int size);

extern void perf_output_end(struct perf_output_handle *handle);
extern unsigned int perf_output_copy(struct perf_output_handle *handle,
			     const void *buf, unsigned int len);
extern unsigned int perf_output_skip(struct perf_output_handle *handle,
				     unsigned int len);
extern int perf_swevent_get_recursion_context(void);
extern void perf_swevent_put_recursion_context(int rctx);
extern u64 perf_swevent_set_period(struct perf_event *event);
extern void perf_event_enable(struct perf_event *event);
extern void perf_event_disable(struct perf_event *event);
extern void perf_event_disable_local(struct perf_event *event);
extern void perf_event_disable_inatomic(struct perf_event *event);
extern void perf_event_task_tick(void);
extern int perf_event_account_interrupt(struct perf_event *event);
#else /* !CONFIG_PERF_EVENTS: */


static inline void *

perf_aux_output_begin(struct perf_output_handle *handle,
		      struct perf_event *event)				{ return NULL; }

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Thomas Gleixner314.29%150.00%


Total21100.00%2100.00%





static inline void

perf_aux_output_end(struct perf_output_handle *handle, unsigned long size)
									{ }

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static inline int

perf_aux_output_skip(struct perf_output_handle *handle,
		     unsigned long size)				{ return -EINVAL; }

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static inline void *

perf_get_aux(struct perf_output_handle *handle)				{ return NULL; }

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static inline void

perf_event_task_migrate(struct task_struct *task)			{ }

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Peter Zijlstra872.73%150.00%


Alexander Shishkin327.27%150.00%


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static inline void

perf_event_task_sched_in(struct task_struct *prev,
			 struct task_struct *task)			{ }

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Peter Zijlstra318.75%125.00%


Jiri Olsa16.25%125.00%


Total16100.00%4100.00%





static inline void

perf_event_task_sched_out(struct task_struct *prev,
			  struct task_struct *next)			{ }

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static inline int perf_event_init_task(struct task_struct *child)	{ return 0; }

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Ingo Molnar853.33%360.00%


Thomas Gleixner640.00%120.00%


Peter Zijlstra16.67%120.00%


Total15100.00%5100.00%






static inline void perf_event_exit_task(struct task_struct *child)	{ }

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Thomas Gleixner218.18%133.33%


Total11100.00%3100.00%






static inline void perf_event_free_task(struct task_struct *task)	{ }

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Peter Zijlstra1090.91%150.00%


Ingo Molnar19.09%150.00%


Total11100.00%2100.00%






static inline void perf_event_delayed_put(struct task_struct *task)	{ }

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Thomas Gleixner654.55%150.00%


Peter Zijlstra545.45%150.00%


Total11100.00%2100.00%






static inline struct file *perf_event_get(unsigned int fd)	{ return ERR_PTR(-EINVAL); }

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Alexei Starovoitov15.00%150.00%


Total20100.00%2100.00%






static inline const struct perf_event_attr *perf_event_attrs(struct perf_event *event)
{
	return ERR_PTR(-EINVAL);
}

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Total22100.00%1100.00%






static inline int perf_event_read_local(struct perf_event *event, u64 *value,
					u64 *enabled, u64 *running)
{
	return -EINVAL;
}

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Yonghong Song828.57%133.33%


Alexei Starovoitov517.86%133.33%


Total28100.00%3100.00%






static inline void perf_event_print_debug(void)				{ }

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Thomas Gleixner562.50%133.33%


Peter Zijlstra225.00%133.33%


Ingo Molnar112.50%133.33%


Total8100.00%3100.00%






static inline int perf_event_task_disable(void)				{ return -EINVAL; }

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Total13100.00%2100.00%






static inline int perf_event_task_enable(void)				{ return -EINVAL; }

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Total13100.00%2100.00%






static inline int perf_event_refresh(struct perf_event *event, int refresh)
{
	return -EINVAL;
}


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Total19100.00%1100.00%





static inline void

perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)	{ }

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Peter Zijlstra1890.00%375.00%


Ingo Molnar210.00%125.00%


Total20100.00%4100.00%





static inline void

perf_sw_event_sched(u32 event_id, u64 nr, u64 addr)			{ }

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Frédéric Weisbecker320.00%150.00%


Total15100.00%2100.00%





static inline void

perf_bp_event(struct perf_event *event, void *data)			{ }


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Peter Zijlstra320.00%150.00%


Total15100.00%2100.00%






static inline int perf_register_guest_info_callbacks
(struct perf_guest_info_callbacks *callbacks)				{ return 0; }

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static inline int perf_unregister_guest_info_callbacks
(struct perf_guest_info_callbacks *callbacks)				{ return 0; }


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Yanmin Zhang15100.00%2100.00%


Total15100.00%2100.00%






static inline void perf_event_mmap(struct vm_area_struct *vma)		{ }

Contributors
PersonTokensPropCommitsCommitProp
Peter Zijlstra1090.91%266.67%


Ingo Molnar19.09%133.33%


Total11100.00%3100.00%






static inline void perf_event_exec(void)				{ }

Contributors
PersonTokensPropCommitsCommitProp
Peter Zijlstra8100.00%1100.00%


Total8100.00%1100.00%






static inline void perf_event_comm(struct task_struct *tsk, bool exec)	{ }

Contributors
PersonTokensPropCommitsCommitProp
Peter Zijlstra1071.43%133.33%


Adrian Hunter321.43%133.33%


Ingo Molnar17.14%133.33%


Total14100.00%3100.00%






static inline void perf_event_namespaces(struct task_struct *tsk)	{ }

Contributors
PersonTokensPropCommitsCommitProp
Hari Bathini11100.00%1100.00%


Total11100.00%1100.00%






static inline void perf_event_fork(struct task_struct *tsk)		{ }

Contributors
PersonTokensPropCommitsCommitProp
Peter Zijlstra1090.91%150.00%


Ingo Molnar19.09%150.00%


Total11100.00%2100.00%






static inline void perf_event_init(void)				{ }

Contributors
PersonTokensPropCommitsCommitProp
Ingo Molnar8100.00%2100.00%


Total8100.00%2100.00%






static inline int  perf_swevent_get_recursion_context(void)		{ return -1; }

Contributors
PersonTokensPropCommitsCommitProp
Frédéric Weisbecker1184.62%150.00%


Peter Zijlstra215.38%150.00%


Total13100.00%2100.00%






static inline void perf_swevent_put_recursion_context(int rctx)		{ }

Contributors
PersonTokensPropCommitsCommitProp
Frédéric Weisbecker777.78%150.00%


Peter Zijlstra222.22%150.00%


Total9100.00%2100.00%






static inline u64 perf_swevent_set_period(struct perf_event *event)	{ return 0; }

Contributors
PersonTokensPropCommitsCommitProp
Jiri Olsa15100.00%1100.00%


Total15100.00%1100.00%






static inline void perf_event_enable(struct perf_event *event)		{ }

Contributors
PersonTokensPropCommitsCommitProp
Frédéric Weisbecker11100.00%1100.00%


Total11100.00%1100.00%






static inline void perf_event_disable(struct perf_event *event)		{ }

Contributors
PersonTokensPropCommitsCommitProp
Frédéric Weisbecker11100.00%1100.00%


Total11100.00%1100.00%






static inline int __perf_event_disable(void *info)			{ return -1; }

Contributors
PersonTokensPropCommitsCommitProp
K.Prasad15100.00%1100.00%


Total15100.00%1100.00%






static inline void perf_event_task_tick(void)				{ }

Contributors
PersonTokensPropCommitsCommitProp
Peter Zijlstra8100.00%1100.00%


Total8100.00%1100.00%






static inline int perf_event_release_kernel(struct perf_event *event)	{ return 0; }

Contributors
PersonTokensPropCommitsCommitProp
Xia Kaixu15100.00%1100.00%


Total15100.00%1100.00%



#endif

#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
extern void perf_restore_debug_store(void);
#else



static inline void perf_restore_debug_store(void)			{ }

Contributors
PersonTokensPropCommitsCommitProp
Stéphane Eranian8100.00%1100.00%


Total8100.00%1100.00%



#endif




static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag)
{
	return frag->pad < sizeof(u64);
}


Contributors
PersonTokensPropCommitsCommitProp
Daniel Borkmann23100.00%1100.00%


Total23100.00%1100.00%




#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))


struct perf_pmu_events_attr {
	
struct device_attribute attr;
	
u64 id;
	
const char *event_str;
};


struct perf_pmu_events_ht_attr {
	
struct device_attribute			attr;
	
u64					id;
	
const char				*event_str_ht;
	
const char				*event_str_noht;
};

ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
			      char *page);


#define PMU_EVENT_ATTR(_name, _var, _id, _show)				\
static struct perf_pmu_events_attr _var = {                             \
        .attr = __ATTR(_name, 0444, _show, NULL),                       \
        .id   =  _id,                                                   \
};


#define PMU_EVENT_ATTR_STRING(_name, _var, _str)			    \
static struct perf_pmu_events_attr _var = {                                 \
        .attr           = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \
        .id             = 0,                                                \
        .event_str      = _str,                                             \
};


#define PMU_FORMAT_ATTR(_name, _format)					\
static ssize_t                                                          \
_name##_show(struct device *dev,                                        \
                               struct device_attribute *attr,           \
                               char *page)                              \
{                                                                       \
        BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE);                     \
        return sprintf(page, _format "\n");                             \
}                                                                       \
                                                                        \
static struct device_attribute format_attr_##_name = __ATTR_RO(_name)

/* Performance counter hotplug functions */
#ifdef CONFIG_PERF_EVENTS
int perf_event_init_cpu(unsigned int cpu);
int perf_event_exit_cpu(unsigned int cpu);
#else

#define perf_event_init_cpu	NULL

#define perf_event_exit_cpu	NULL
#endif

#endif /* _LINUX_PERF_EVENT_H */

Overall Contributors
PersonTokensPropCommitsCommitProp
Peter Zijlstra110324.64%10034.72%


Frédéric Weisbecker3658.15%206.94%


Alexander Shishkin3497.80%82.78%


Ingo Molnar2756.14%175.90%


Stéphane Eranian2014.49%196.60%


Thomas Gleixner1974.40%82.78%


Jiri Olsa1683.75%113.82%


Arnaldo Carvalho de Melo1663.71%82.78%


Zheng Yan1503.35%62.08%


Markus Metzger1453.24%10.35%


Wang Nan1423.17%20.69%


Paul Mackerras1242.77%134.51%


Xia Kaixu1042.32%10.35%


Alexei Starovoitov942.10%62.08%


Yanmin Zhang891.99%20.69%


Matt Fleming841.88%41.39%


Daniel Borkmann811.81%20.69%


Sukadev Bhattiprolu430.96%31.04%


Avi Kivity400.89%20.69%


Dave Hansen380.85%10.35%


Arjan van de Ven350.78%10.35%


Andi Kleen340.76%41.39%


Lin Ming320.71%10.35%


David Carrillo-Cisneros320.71%41.39%


Kan Liang320.71%31.04%


Cody P Schafer300.67%20.69%


Andrew Lutomirski300.67%20.69%


Mark Rutland220.49%31.04%


Jason Baron220.49%20.69%


Yonghong Song210.47%10.35%


Franck Bui-Huu210.47%10.35%


Hari Bathini210.47%10.35%


K.Prasad200.45%10.35%


Suravee Suthikulpanit200.45%10.35%


Robert Richter170.38%31.04%


Will Deacon160.36%10.35%


Hendrik Brueckner160.36%10.35%


Li Zefan130.29%31.04%


Vince Weaver120.27%20.69%


Oleg Nesterov110.25%10.35%


David Rientjes110.25%10.35%


Huang Rui90.20%10.35%


Arnd Bergmann80.18%10.35%


Adrian Hunter60.13%10.35%


Andrey Vagin50.11%10.35%


Matt Helsley40.09%10.35%


Richard Kennedy40.09%10.35%


Andrew Jones30.07%10.35%


Al Viro20.04%10.35%


Mischa Jonker20.04%10.35%


Soeren Sandmann Pedersen20.04%10.35%


Steven Rostedt10.02%10.35%


David Howells10.02%10.35%


Arun Sharma10.02%10.35%


Nobuhiro Iwamatsu10.02%10.35%


Eric B Munson10.02%10.35%


Total4476100.00%288100.00%


Directory: include/linux



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