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