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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2010-09-17 11:28:50 +0200
committerIngo Molnar <mingo@elte.hu>2010-09-17 12:48:48 +0200
commite9d2b064149ff7ef4acbc65a1b9374ac8b218d3e (patch)
tree6ce885c6052a6e05046b9937376107e4bcf378fe /include
parent917bdd1c9b7b0f4c22f2504c2f0c1074c8ab9df7 (diff)
perf: Undo the per cpu-context timer stuff
Revert the timer per cpu-context timers because of unfortunate nohz interaction. Fixing that would have been somewhat ugly, so go back to driving things from the regular tick. Provide a jiffies interval feature for people who want slower rotations. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <20100917093009.519845633@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/perf_event.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 165287fd2cc4..61b1e2d760fd 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -870,8 +870,8 @@ struct perf_cpu_context {
struct perf_event_context *task_ctx;
int active_oncpu;
int exclusive;
- u64 timer_interval;
- struct hrtimer timer;
+ struct list_head rotation_list;
+ int jiffies_interval;
};
struct perf_output_handle {
@@ -1065,6 +1065,7 @@ extern int perf_swevent_get_recursion_context(void);
extern void perf_swevent_put_recursion_context(int rctx);
extern void perf_event_enable(struct perf_event *event);
extern void perf_event_disable(struct perf_event *event);
+extern void perf_event_task_tick(void);
#else
static inline void
perf_event_task_sched_in(struct task_struct *task) { }
@@ -1099,6 +1100,7 @@ static inline int perf_swevent_get_recursion_context(void) { return -1; }
static inline void perf_swevent_put_recursion_context(int rctx) { }
static inline void perf_event_enable(struct perf_event *event) { }
static inline void perf_event_disable(struct perf_event *event) { }
+static inline void perf_event_task_tick(void) { }
#endif
#define perf_output_put(handle, x) \