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authorFrederic Weisbecker <fweisbec@gmail.com>2011-05-19 19:55:04 +0200
committerIngo Molnar <mingo@elte.hu>2011-06-09 12:57:54 +0200
commit76369139ceb955deefc509e6e12ce9d6ce50ccab (patch)
tree5ba2732188d2fecd4fd49b93f73e51e17fb69082 /include/linux/perf_event.h
parentb58f6b0dd3d677338b9065388cc2cc942b86338e (diff)
perf: Split up buffer handling from core code
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>
Diffstat (limited to 'include/linux/perf_event.h')
-rw-r--r--include/linux/perf_event.h33
1 files changed, 4 insertions, 29 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 3412684ce5d5..779f6ed54d52 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -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;