From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/oprofile/cpu_buffer.h | 57 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 drivers/oprofile/cpu_buffer.h (limited to 'drivers/oprofile/cpu_buffer.h') diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h new file mode 100644 index 00000000000..09abb80e057 --- /dev/null +++ b/drivers/oprofile/cpu_buffer.h @@ -0,0 +1,57 @@ +/** + * @file cpu_buffer.h + * + * @remark Copyright 2002 OProfile authors + * @remark Read the file COPYING + * + * @author John Levon + */ + +#ifndef OPROFILE_CPU_BUFFER_H +#define OPROFILE_CPU_BUFFER_H + +#include +#include +#include +#include + +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 oprofile_cpu_buffer { + volatile unsigned long head_pos; + volatile unsigned long tail_pos; + unsigned long buffer_size; + struct task_struct * last_task; + int last_is_kernel; + int tracing; + struct op_sample * buffer; + unsigned long sample_received; + unsigned long sample_lost_overflow; + unsigned long backtrace_aborted; + int cpu; + struct work_struct work; +} ____cacheline_aligned; + +extern struct oprofile_cpu_buffer cpu_buffer[]; + +void cpu_buffer_reset(struct oprofile_cpu_buffer * cpu_buf); + +/* transient events for the CPU buffer -> event buffer */ +#define CPU_IS_KERNEL 1 +#define CPU_TRACE_BEGIN 2 + +#endif /* OPROFILE_CPU_BUFFER_H */ -- cgit v1.2.3