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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/oprofile/cpu_buffer.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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!
Diffstat (limited to 'drivers/oprofile/cpu_buffer.h')
-rw-r--r-- | drivers/oprofile/cpu_buffer.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h new file mode 100644 index 0000000..09abb80 --- /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 <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> + +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 */ |