perf.h

Go to the documentation of this file.

#ifndef _PERF_PERF_H
#define _PERF_PERF_H

struct winsize;

void get_term_dimensions(struct winsize *ws);

#include <asm/unistd.h>

#if defined(__i386__)
#define rmb()       asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
#define cpu_relax() asm volatile("rep; nop" ::: "memory");
#define CPUINFO_PROC    "model name"
#ifndef __NR_perf_event_open
# define __NR_perf_event_open 336
#endif
#endif

#if defined(__x86_64__)
#define rmb()       asm volatile("lfence" ::: "memory")
#define cpu_relax() asm volatile("rep; nop" ::: "memory");
#define CPUINFO_PROC    "model name"
#ifndef __NR_perf_event_open
# define __NR_perf_event_open 298
#endif
#endif

#ifdef __powerpc__
#define rmb()       asm volatile ("sync" ::: "memory")
#define cpu_relax() asm volatile ("" ::: "memory");
#define CPUINFO_PROC    "cpu"
#endif

#ifdef __s390__
#define rmb()       asm volatile("bcr 15,0" ::: "memory")
#define cpu_relax() asm volatile("" ::: "memory");
#endif

#ifdef __sh__
#if defined(__SH4A__) || defined(__SH5__)
# define rmb()      asm volatile("synco" ::: "memory")
#else
# define rmb()      asm volatile("" ::: "memory")
#endif
#define cpu_relax() asm volatile("" ::: "memory")
#define CPUINFO_PROC    "cpu type"
#endif

#ifdef __hppa__
#define rmb()       asm volatile("" ::: "memory")
#define cpu_relax() asm volatile("" ::: "memory");
#define CPUINFO_PROC    "cpu"
#endif

#ifdef __sparc__
#define rmb()       asm volatile("":::"memory")
#define cpu_relax() asm volatile("":::"memory")
#define CPUINFO_PROC    "cpu"
#endif

#ifdef __alpha__
#define rmb()       asm volatile("mb" ::: "memory")
#define cpu_relax() asm volatile("" ::: "memory")
#define CPUINFO_PROC    "cpu model"
#endif

#ifdef __ia64__
#define rmb()       asm volatile ("mf" ::: "memory")
#define cpu_relax() asm volatile ("hint @pause" ::: "memory")
#define CPUINFO_PROC    "model name"
#endif

#ifdef __arm__
/*
 * Use the __kuser_memory_barrier helper in the CPU helper page. See
 * arch/arm/kernel/entry-armv.S in the kernel source for details.
 */
#define rmb()       ((void(*)(void))0xffff0fa0)()
#define cpu_relax() asm volatile("":::"memory")
#define CPUINFO_PROC    "Processor"
#endif

#ifdef __aarch64__
#define rmb()       asm volatile("dmb ld" ::: "memory")
#define cpu_relax() asm volatile("yield" ::: "memory")
#endif

#ifdef __mips__
#define rmb()       asm volatile(                   \
                ".set   mips2\n\t"          \
                "sync\n\t"              \
                ".set   mips0"              \
                : /* no output */           \
                : /* no input */            \
                : "memory")
#define cpu_relax() asm volatile("" ::: "memory")
#define CPUINFO_PROC    "cpu model"
#endif

#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/syscall.h>

#include <linux/perf_event.h>
#include "util/types.h"
#include <stdbool.h>

struct perf_mmap {
    void            *base;
    int         mask;
    unsigned int        prev;
};

static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
{
    struct perf_event_mmap_page *pc = mm->base;
    int head = pc->data_head;
    rmb();
    return head;
}

static inline void perf_mmap__write_tail(struct perf_mmap *md,
                     unsigned long tail)
{
    struct perf_event_mmap_page *pc = md->base;

    /*
     * ensure all reads are done before we write the tail out.
     */
    /* mb(); */
    pc->data_tail = tail;
}

/*
 * prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all
 * counters in the current task.
 */
#define PR_TASK_PERF_EVENTS_DISABLE   31
#define PR_TASK_PERF_EVENTS_ENABLE    32

#ifndef NSEC_PER_SEC
# define NSEC_PER_SEC           1000000000ULL
#endif

static inline unsigned long long rdclock(void)
{
    struct timespec ts;

    clock_gettime(CLOCK_MONOTONIC, &ts);
    return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
}

/*
 * Pick up some kernel type conventions:
 */
#define __user
#define asmlinkage

#define unlikely(x) __builtin_expect(!!(x), 0)
#define min(x, y) ({                \
    typeof(x) _min1 = (x);          \
    typeof(y) _min2 = (y);          \
    (void) (&_min1 == &_min2);      \
    _min1 < _min2 ? _min1 : _min2; })

static inline int
sys_perf_event_open(struct perf_event_attr *attr,
              pid_t pid, int cpu, int group_fd,
              unsigned long flags)
{
    return syscall(__NR_perf_event_open, attr, pid, cpu,
               group_fd, flags);
}

#define MAX_COUNTERS            256
#define MAX_NR_CPUS         256

struct ip_callchain {
    u64 nr;
    u64 ips[0];
};

struct branch_flags {
    u64 mispred:1;
    u64 predicted:1;
    u64 reserved:62;
};

struct branch_entry {
    u64             from;
    u64             to;
    struct branch_flags flags;
};

struct branch_stack {
    u64             nr;
    struct branch_entry entries[0];
};

extern bool perf_host, perf_guest;
extern const char perf_version_string[];

void pthread__unblock_sigwinch(void);

#include "util/target.h"

enum perf_call_graph_mode {
    CALLCHAIN_NONE,
    CALLCHAIN_FP,
    CALLCHAIN_DWARF
};

struct perf_record_opts {
    struct perf_target target;
    int      call_graph;
    bool         group;
    bool         inherit_stat;
    bool         no_delay;
    bool         no_inherit;
    bool         no_samples;
    bool         pipe_output;
    bool         raw_samples;
    bool         sample_address;
    bool         sample_time;
    bool         sample_id_all_missing;
    bool         exclude_guest_missing;
    bool         period;
    unsigned int freq;
    unsigned int mmap_pages;
    unsigned int user_freq;
    u64          branch_stack;
    u64      default_interval;
    u64      user_interval;
    u16      stack_dump_size;
};

#endif