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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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bc078e4eab
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>
44 lines
1.0 KiB
C
44 lines
1.0 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_backtrace(unsigned long depth);
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int oprofile_set_timeout(unsigned long time);
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#endif /* OPROF_H */
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