perf_counter: output objects

Provide a {type,size} header for each output entry.

This should provide extensible output, and the ability to mix multiple streams.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Orig-LKML-Reference: <20090325113316.831607932@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 48212c15b7d6..c256635377d4 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -156,6 +156,16 @@ struct perf_counter_mmap_page {
         __u32   data_head;              /* head in the data section */
 };
 
+struct perf_event_header {
+        __u32   type;
+        __u32   size;
+};
+
+enum perf_event_type {
+        PERF_EVENT_IP           = 0,
+        PERF_EVENT_GROUP        = 1,
+};
+
 #ifdef __KERNEL__
 /*
  * Kernel-internal data types and definitions:
@@ -260,6 +270,7 @@ struct perf_counter {
         struct list_head                list_entry;
         struct list_head                event_entry;
         struct list_head                sibling_list;
+        int                             nr_siblings;
         struct perf_counter             *group_leader;
         const struct hw_perf_counter_ops *hw_ops;