| /** |
| * @file cpu_buffer.h |
| * |
| * @remark Copyright 2002 OProfile authors |
| * @remark Read the file COPYING |
| * |
| * @author John Levon <levon@movementarian.org> |
| */ |
| |
| #ifndef OPROFILE_CPU_BUFFER_H |
| #define OPROFILE_CPU_BUFFER_H |
| |
| #include <linux/types.h> |
| #include <linux/spinlock.h> |
| #include <linux/workqueue.h> |
| #include <linux/cache.h> |
| #include <linux/sched.h> |
| #include <linux/ring_buffer.h> |
| |
| struct task_struct; |
| |
| int alloc_cpu_buffers(void); |
| void free_cpu_buffers(void); |
| |
| void start_cpu_work(void); |
| void end_cpu_work(void); |
| |
| /* CPU buffer is composed of such entries (which are |
| * also used for context switch notes) |
| */ |
| struct op_sample { |
| unsigned long eip; |
| unsigned long event; |
| }; |
| |
| struct op_entry { |
| struct ring_buffer_event *event; |
| struct op_sample *sample; |
| unsigned long irq_flags; |
| }; |
| |
| struct oprofile_cpu_buffer { |
| unsigned long buffer_size; |
| struct task_struct *last_task; |
| int last_is_kernel; |
| int tracing; |
| unsigned long sample_received; |
| unsigned long sample_lost_overflow; |
| unsigned long backtrace_aborted; |
| unsigned long sample_invalid_eip; |
| int cpu; |
| struct delayed_work work; |
| }; |
| |
| DECLARE_PER_CPU(struct oprofile_cpu_buffer, cpu_buffer); |
| |
| /* |
| * Resets the cpu buffer to a sane state. |
| * |
| * reset these to invalid values; the next sample collected will |
| * populate the buffer with proper values to initialize the buffer |
| */ |
| static inline void op_cpu_buffer_reset(int cpu) |
| { |
| struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu); |
| |
| cpu_buf->last_is_kernel = -1; |
| cpu_buf->last_task = NULL; |
| } |
| |
| int op_cpu_buffer_write_entry(struct op_entry *entry); |
| int op_cpu_buffer_write_commit(struct op_entry *entry); |
| struct op_sample *op_cpu_buffer_read_entry(int cpu); |
| unsigned long op_cpu_buffer_entries(int cpu); |
| |
| /* transient events for the CPU buffer -> event buffer */ |
| #define CPU_IS_KERNEL 1 |
| #define CPU_TRACE_BEGIN 2 |
| #define IBS_FETCH_BEGIN 3 |
| #define IBS_OP_BEGIN 4 |
| |
| #endif /* OPROFILE_CPU_BUFFER_H */ |