a0d76247e0
This patch is a rework of the hwsampler oprofile implementation that has been applied recently. Now there are less non-architectural changes. The only changes are: * introduction of oprofile_add_ext_hw_sample(), and * removal of section attributes of oprofile_timer_init/_exit(). To setup hwsampler for oprofile we need to modify start()/stop() callbacks and additional hwsampler control files in oprofilefs. We do not reinitialize the timer or hwsampler mode by restarting calling init/exit() anymore, instead hwsampler_running is used to switch the mode directly in oprofile_hwsampler_start/_stop(). For locking reasons there is also hwsampler_file that reflects the value in oprofilefs. The overall diffstat of the oprofile s390 hwsampler implemenation shows the low impact to non-architectural code: arch/Kconfig | 3 + arch/s390/Kconfig | 1 + arch/s390/oprofile/Makefile | 2 +- arch/s390/oprofile/hwsampler.c | 1256 ++++++++++++++++++++++++++++++++++ arch/s390/oprofile/hwsampler.h | 113 +++ arch/s390/oprofile/hwsampler_files.c | 162 +++++ arch/s390/oprofile/init.c | 6 +- drivers/oprofile/cpu_buffer.c | 24 +- drivers/oprofile/timer_int.c | 4 +- include/linux/oprofile.h | 7 + 10 files changed, 1567 insertions(+), 11 deletions(-) Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
44 lines
1.0 KiB
C
44 lines
1.0 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_ulong(unsigned long *addr, unsigned long val);
|
|
int oprofile_set_timeout(unsigned long time);
|
|
|
|
#endif /* OPROF_H */
|