mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 04:16:46 +07:00
8cb76d99d7
We plan to display the callchains depending on some user-configurable parameters. To gather the callchains stats from the recorded stream in a fast way, this patch introduces an ad hoc radix tree adapted for callchains and also a rbtree to sort these callchains once we have gathered every events from the stream. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1246026481-8314-2-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
#ifndef _PERF_PERF_H
|
|
#define _PERF_PERF_H
|
|
|
|
#if defined(__x86_64__) || defined(__i386__)
|
|
#include "../../arch/x86/include/asm/unistd.h"
|
|
#define rmb() asm volatile("lfence" ::: "memory")
|
|
#define cpu_relax() asm volatile("rep; nop" ::: "memory");
|
|
#endif
|
|
|
|
#ifdef __powerpc__
|
|
#include "../../arch/powerpc/include/asm/unistd.h"
|
|
#define rmb() asm volatile ("sync" ::: "memory")
|
|
#define cpu_relax() asm volatile ("" ::: "memory");
|
|
#endif
|
|
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include "../../include/linux/perf_counter.h"
|
|
#include "util/types.h"
|
|
|
|
/*
|
|
* prctl(PR_TASK_PERF_COUNTERS_DISABLE) will (cheaply) disable all
|
|
* counters in the current task.
|
|
*/
|
|
#define PR_TASK_PERF_COUNTERS_DISABLE 31
|
|
#define PR_TASK_PERF_COUNTERS_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_counter_open(struct perf_counter_attr *attr,
|
|
pid_t pid, int cpu, int group_fd,
|
|
unsigned long flags)
|
|
{
|
|
attr->size = sizeof(*attr);
|
|
return syscall(__NR_perf_counter_open, attr, pid, cpu,
|
|
group_fd, flags);
|
|
}
|
|
|
|
#define MAX_COUNTERS 256
|
|
#define MAX_NR_CPUS 256
|
|
|
|
struct ip_callchain {
|
|
u64 nr;
|
|
u64 ips[0];
|
|
};
|
|
|
|
#endif
|