linux/drivers/oprofile/oprof.h
Martin Schwidefsky bc078e4eab oprofile: convert oprofile from timer_hook to hrtimer
Oprofile is currently broken on systems running with NOHZ enabled.
A maximum of 1 tick is accounted via the timer_hook if a cpu sleeps
for a longer period of time. This does bad things to the percentages
in the profiler output. To solve this problem convert oprofile to
use a restarting hrtimer instead of the timer_hook.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
2010-03-02 17:03:20 +01:00

43 lines
1 KiB
C

/**
* @file oprof.h
*
* @remark Copyright 2002 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon <levon@movementarian.org>
*/
#ifndef OPROF_H
#define OPROF_H
int oprofile_setup(void);
void oprofile_shutdown(void);
int oprofilefs_register(void);
void oprofilefs_unregister(void);
int oprofile_start(void);
void oprofile_stop(void);
struct oprofile_operations;
extern unsigned long oprofile_buffer_size;
extern unsigned long oprofile_cpu_buffer_size;
extern unsigned long oprofile_buffer_watershed;
extern unsigned long oprofile_time_slice;
extern struct oprofile_operations oprofile_ops;
extern unsigned long oprofile_started;
extern unsigned long oprofile_backtrace_depth;
struct super_block;
struct dentry;
void oprofile_create_files(struct super_block *sb, struct dentry *root);
int oprofile_timer_init(struct oprofile_operations *ops);
void oprofile_timer_exit(void);
int oprofile_set_backtrace(unsigned long depth);
int oprofile_set_timeout(unsigned long time);
#endif /* OPROF_H */