58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/**
|
|
* @file cpu_buffer.h
|
|
*
|
|
* @remark Copyright 2002 OProfile authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author John Levon <levon@movementarian.org>
|
|
*/
|
|
|
|
#ifndef OPROFILE_CPU_BUFFER_H
|
|
#define OPROFILE_CPU_BUFFER_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/cache.h>
|
|
|
|
struct task_struct;
|
|
|
|
int alloc_cpu_buffers(void);
|
|
void free_cpu_buffers(void);
|
|
|
|
void start_cpu_work(void);
|
|
void end_cpu_work(void);
|
|
|
|
/* CPU buffer is composed of such entries (which are
|
|
* also used for context switch notes)
|
|
*/
|
|
struct op_sample {
|
|
unsigned long eip;
|
|
unsigned long event;
|
|
};
|
|
|
|
struct oprofile_cpu_buffer {
|
|
volatile unsigned long head_pos;
|
|
volatile unsigned long tail_pos;
|
|
unsigned long buffer_size;
|
|
struct task_struct * last_task;
|
|
int last_is_kernel;
|
|
int tracing;
|
|
struct op_sample * buffer;
|
|
unsigned long sample_received;
|
|
unsigned long sample_lost_overflow;
|
|
unsigned long backtrace_aborted;
|
|
int cpu;
|
|
struct work_struct work;
|
|
} ____cacheline_aligned;
|
|
|
|
extern struct oprofile_cpu_buffer cpu_buffer[];
|
|
|
|
void cpu_buffer_reset(struct oprofile_cpu_buffer * cpu_buf);
|
|
|
|
/* transient events for the CPU buffer -> event buffer */
|
|
#define CPU_IS_KERNEL 1
|
|
#define CPU_TRACE_BEGIN 2
|
|
|
|
#endif /* OPROFILE_CPU_BUFFER_H */
|