buffer_sync.c File Reference

#include <linux/mm.h>
#include <linux/workqueue.h>
#include <linux/notifier.h>
#include <linux/dcookies.h>
#include <linux/profile.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/oprofile.h>
#include <linux/sched.h>
#include <linux/gfp.h>
#include "oprofile_stats.h"
#include "event_buffer.h"
#include "cpu_buffer.h"
#include "buffer_sync.h"

Go to the source code of this file.

Enumerations
enum	sync_buffer_state { sb_bt_ignore = -2, sb_buffer_start, sb_bt_start, sb_sample_start }

Functions
int	sync_start (void)
void	sync_stop (void)
void	sync_buffer (int cpu)
void	oprofile_put_buff (unsigned long *buf, unsigned int start, unsigned int stop, unsigned int max)

Detailed Description

Remarks

Copyright 2002-2009 OProfile authors

Read the file COPYING

Author

John Levon levon.nosp@m.@mov.nosp@m.ement.nosp@m.aria.nosp@m.n.org

Barry Kasindorf

Robert Richter rober.nosp@m.t.ri.nosp@m.chter.nosp@m.@amd.nosp@m..com

This is the core of the buffer management. Each CPU buffer is processed and entered into the global event buffer. Such processing is necessary in several circumstances, mentioned below.

The processing does the job of converting the transitory EIP value into a persistent dentry/offset value that the profiler can record at its leisure.

See fs/dcookies.c for a description of the dentry/offset objects.

Definition in file buffer_sync.c.

Enumeration Type Documentation

enum sync_buffer_state

Enumerator:

sb_bt_ignore
sb_buffer_start
sb_bt_start
sb_sample_start

Definition at line 476 of file buffer_sync.c.

Function Documentation

void oprofile_put_buff	(	unsigned long *	buf,
		unsigned int	start,
		unsigned int	stop,
		unsigned int	max
	)

Add the contents of a circular buffer to the event buffer.

Definition at line 570 of file buffer_sync.c.

void sync_buffer

(

int

cpu

)

Definition at line 489 of file buffer_sync.c.

int sync_start

(

void

)

Definition at line 151 of file buffer_sync.c.

void sync_stop

(

void

)

Definition at line 188 of file buffer_sync.c.