Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /** |
| 2 | * @file cpu_buffer.h |
| 3 | * |
| 4 | * @remark Copyright 2002 OProfile authors |
| 5 | * @remark Read the file COPYING |
| 6 | * |
| 7 | * @author John Levon <levon@movementarian.org> |
| 8 | */ |
| 9 | |
| 10 | #ifndef OPROFILE_CPU_BUFFER_H |
| 11 | #define OPROFILE_CPU_BUFFER_H |
| 12 | |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/spinlock.h> |
| 15 | #include <linux/workqueue.h> |
| 16 | #include <linux/cache.h> |
Mike Travis | 608dfdd | 2008-04-28 02:14:15 -0700 | [diff] [blame] | 17 | #include <linux/sched.h> |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame^] | 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | struct task_struct; |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame^] | 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | int alloc_cpu_buffers(void); |
| 22 | void free_cpu_buffers(void); |
| 23 | |
| 24 | void start_cpu_work(void); |
| 25 | void end_cpu_work(void); |
| 26 | |
| 27 | /* CPU buffer is composed of such entries (which are |
| 28 | * also used for context switch notes) |
| 29 | */ |
| 30 | struct op_sample { |
| 31 | unsigned long eip; |
| 32 | unsigned long event; |
| 33 | }; |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame^] | 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | struct oprofile_cpu_buffer { |
| 36 | volatile unsigned long head_pos; |
| 37 | volatile unsigned long tail_pos; |
| 38 | unsigned long buffer_size; |
Robert Richter | 25ad291 | 2008-09-05 17:12:36 +0200 | [diff] [blame] | 39 | struct task_struct *last_task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | int last_is_kernel; |
| 41 | int tracing; |
Robert Richter | 25ad291 | 2008-09-05 17:12:36 +0200 | [diff] [blame] | 42 | struct op_sample *buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | unsigned long sample_received; |
| 44 | unsigned long sample_lost_overflow; |
| 45 | unsigned long backtrace_aborted; |
Philippe Elie | df9d177 | 2007-11-14 16:58:48 -0800 | [diff] [blame] | 46 | unsigned long sample_invalid_eip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | int cpu; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 48 | struct delayed_work work; |
Eric Dumazet | 8b8b498 | 2008-05-14 16:05:31 -0700 | [diff] [blame] | 49 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Mike Travis | 608dfdd | 2008-04-28 02:14:15 -0700 | [diff] [blame] | 51 | DECLARE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Robert Richter | 25ad291 | 2008-09-05 17:12:36 +0200 | [diff] [blame] | 53 | void cpu_buffer_reset(struct oprofile_cpu_buffer *cpu_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
| 55 | /* transient events for the CPU buffer -> event buffer */ |
| 56 | #define CPU_IS_KERNEL 1 |
| 57 | #define CPU_TRACE_BEGIN 2 |
Barry Kasindorf | 345c257 | 2008-07-22 21:08:54 +0200 | [diff] [blame] | 58 | #define IBS_FETCH_BEGIN 3 |
| 59 | #define IBS_OP_BEGIN 4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | #endif /* OPROFILE_CPU_BUFFER_H */ |