mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-29 23:24:11 +08:00
05484298cb
perf record has a new option -W that enables weightened sampling.
Add sorting support in top/report for the average weight per sample and the
total weight sum. This allows to both compare relative cost per event
and the total cost over the measurement period.
Add the necessary glue to perf report, record and the library.
v2: Merge with new hist refactoring.
v3: Fix manpage. Remove value check.
Rename global_weight to weight and weight to local_weight.
v4: Readd sort keys to manpage
v5: Move weight to end
v6: Move weight to template
v7: Rename weight key.
Original patch from Andi modified by Stephane Eranian <eranian@google.com>
to include ONLY the weight supporting code and apply to pristine 3.8.0-rc4.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1359040242-8269-6-git-send-email-eranian@google.com
[ committer note: changed to cope with fc5871ed and the hists_link perf test entry ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
234 lines
5.1 KiB
C
234 lines
5.1 KiB
C
#ifndef _PERF_PERF_H
|
|
#define _PERF_PERF_H
|
|
|
|
#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__
|
|
#include "../../arch/powerpc/include/uapi/asm/unistd.h"
|
|
#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
|
|
|
|
#ifdef __arc__
|
|
#define rmb() asm volatile("" ::: "memory")
|
|
#define cpu_relax() rmb()
|
|
#define CPUINFO_PROC "Processor"
|
|
#endif
|
|
|
|
#ifdef __metag__
|
|
#define rmb() asm volatile("" ::: "memory")
|
|
#define cpu_relax() asm volatile("" ::: "memory")
|
|
#define CPUINFO_PROC "CPU"
|
|
#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>
|
|
|
|
/*
|
|
* 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; })
|
|
|
|
extern bool test_attr__enabled;
|
|
void test_attr__init(void);
|
|
void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
|
|
int fd, int group_fd, unsigned long flags);
|
|
|
|
static inline int
|
|
sys_perf_event_open(struct perf_event_attr *attr,
|
|
pid_t pid, int cpu, int group_fd,
|
|
unsigned long flags)
|
|
{
|
|
int fd;
|
|
|
|
fd = syscall(__NR_perf_event_open, attr, pid, cpu,
|
|
group_fd, flags);
|
|
|
|
if (unlikely(test_attr__enabled))
|
|
test_attr__open(attr, pid, cpu, fd, group_fd, flags);
|
|
|
|
return fd;
|
|
}
|
|
|
|
#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 const char *input_name;
|
|
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_weight;
|
|
bool sample_time;
|
|
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
|