blob: 09abb80e05701afaa3c15ede0996ab8bda316915 [file] [log] [blame]
* @file cpu_buffer.h
* @remark Copyright 2002 OProfile authors
* @remark Read the file COPYING
* @author John Levon <>
#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