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perf: Split up buffer handling from core code

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And create the internal perf events header.

v2: Keep an internal inlined perf_output_copy()

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Stephane Eranian <eranian@google.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1305827704-5607-1-git-send-email-fweisbec@gmail.com
[ v3: use clearer 'ring_buffer' and 'rb' naming ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2011-05-19 19:55:04 +02:00 • committed by Ingo Molnar
parent b58f6b0dd3
commit 76369139ce
5 changed files with 572 additions and 527 deletions
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33
include/linux/perf_event.h
View file

@ -680,33 +680,6 @@ enum perf_event_active_state {
};
struct file;
#define PERF_BUFFER_WRITABLE 0x01
struct perf_buffer {
atomic_t refcount;
struct rcu_head rcu_head;
#ifdef CONFIG_PERF_USE_VMALLOC
struct work_struct work;
int page_order; /* allocation order */
#endif
int nr_pages; /* nr of data pages */
int writable; /* are we writable */
atomic_t poll; /* POLL_ for wakeups */
local_t head; /* write position */
local_t nest; /* nested writers */
local_t events; /* event limit */
local_t wakeup; /* wakeup stamp */
local_t lost; /* nr records lost */
long watermark; /* wakeup watermark */
struct perf_event_mmap_page *user_page;
void *data_pages[0];
};
struct perf_sample_data;
typedef void (*perf_overflow_handler_t)(struct perf_event *, int,
@ -745,6 +718,8 @@ struct perf_cgroup {
};
#endif
struct ring_buffer;
/**
* struct perf_event - performance event kernel representation:
*/
@ -834,7 +809,7 @@ struct perf_event {
atomic_t mmap_count;
int mmap_locked;
struct user_struct *mmap_user;
struct perf_buffer *buffer;
struct ring_buffer *rb;
/* poll related */
wait_queue_head_t waitq;
@ -945,7 +920,7 @@ struct perf_cpu_context {
struct perf_output_handle {
struct perf_event *event;
struct perf_buffer *buffer;
struct ring_buffer *rb;
unsigned long wakeup;
unsigned long size;
void *addr;