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82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/**
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* @file cpu_buffer.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 OPROFILE_CPU_BUFFER_H
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#define OPROFILE_CPU_BUFFER_H
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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#include <linux/cache.h>
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#include <linux/sched.h>
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#include <linux/ring_buffer.h>
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struct task_struct;
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int alloc_cpu_buffers(void);
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void free_cpu_buffers(void);
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void start_cpu_work(void);
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void end_cpu_work(void);
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/* CPU buffer is composed of such entries (which are
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* also used for context switch notes)
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*/
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struct op_sample {
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unsigned long eip;
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unsigned long event;
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};
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struct op_entry {
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struct ring_buffer_event *event;
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struct op_sample *sample;
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unsigned long irq_flags;
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};
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struct oprofile_cpu_buffer {
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unsigned long buffer_size;
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struct task_struct *last_task;
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int last_is_kernel;
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int tracing;
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unsigned long sample_received;
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unsigned long sample_lost_overflow;
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unsigned long backtrace_aborted;
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unsigned long sample_invalid_eip;
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int cpu;
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struct delayed_work work;
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};
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DECLARE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer);
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/*
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* Resets the cpu buffer to a sane state.
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*
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* reset these to invalid values; the next sample collected will
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* populate the buffer with proper values to initialize the buffer
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*/
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static inline void op_cpu_buffer_reset(int cpu)
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{
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struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu);
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cpu_buf->last_is_kernel = -1;
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cpu_buf->last_task = NULL;
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}
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int op_cpu_buffer_write_entry(struct op_entry *entry);
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int op_cpu_buffer_write_commit(struct op_entry *entry);
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struct op_sample *op_cpu_buffer_read_entry(int cpu);
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unsigned long op_cpu_buffer_entries(int cpu);
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/* transient events for the CPU buffer -> event buffer */
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#define CPU_IS_KERNEL 1
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#define CPU_TRACE_BEGIN 2
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#define IBS_FETCH_BEGIN 3
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#define IBS_OP_BEGIN 4
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#endif /* OPROFILE_CPU_BUFFER_H */
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