4 * @remark Copyright 2002 OProfile authors
5 * @remark Read the file COPYING
7 * @author John Levon <levon@movementarian.org>
10 #ifndef OPROFILE_CPU_BUFFER_H
11 #define OPROFILE_CPU_BUFFER_H
13 #include <linux/types.h>
14 #include <linux/spinlock.h>
15 #include <linux/workqueue.h>
16 #include <linux/cache.h>
17 #include <linux/sched.h>
21 int alloc_cpu_buffers(void);
22 void free_cpu_buffers(void);
24 void start_cpu_work(void);
25 void end_cpu_work(void);
27 /* CPU buffer is composed of such entries (which are
28 * also used for context switch notes)
35 struct oprofile_cpu_buffer
{
36 volatile unsigned long head_pos
;
37 volatile unsigned long tail_pos
;
38 unsigned long buffer_size
;
39 struct task_struct
* last_task
;
42 struct op_sample
* buffer
;
43 unsigned long sample_received
;
44 unsigned long sample_lost_overflow
;
45 unsigned long backtrace_aborted
;
46 unsigned long sample_invalid_eip
;
48 struct delayed_work work
;
51 DECLARE_PER_CPU(struct oprofile_cpu_buffer
, cpu_buffer
);
53 void cpu_buffer_reset(struct oprofile_cpu_buffer
* cpu_buf
);
55 /* transient events for the CPU buffer -> event buffer */
56 #define CPU_IS_KERNEL 1
57 #define CPU_TRACE_BEGIN 2
59 #endif /* OPROFILE_CPU_BUFFER_H */
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