diff options
| author | Peter Zijlstra | 2009-11-20 22:19:43 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2009-11-21 14:11:35 +0100 |
| commit | 453f19eea7dbad837425e9b07d84568d14898794 (patch) | |
| tree | 3b1d757a72512b5ab566649b9eda59e032734993 | |
| parent | ef6ae724253429ac70d81e65d052f6a346d330bd (diff) | |
perf: Allow for custom overflow handlers
in-kernel perf users might wish to have custom actions on the
sample interrupt.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20091120212508.222339539@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/perf_event.h | 6 | ||||
| -rw-r--r-- | kernel/perf_event.c | 8 |
2 files changed, 13 insertions, 1 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index b5cdac0de370..a430ac3074af 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -567,6 +567,8 @@ struct perf_pending_entry { typedef void (*perf_callback_t)(struct perf_event *, void *); +struct perf_sample_data; + /** * struct perf_event - performance event kernel representation: */ @@ -658,6 +660,10 @@ struct perf_event { struct pid_namespace *ns; u64 id; + void (*overflow_handler)(struct perf_event *event, + int nmi, struct perf_sample_data *data, + struct pt_regs *regs); + #ifdef CONFIG_EVENT_PROFILE struct event_filter *filter; #endif diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 3852e2656bb0..1dfb6cc4fdea 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -3710,7 +3710,11 @@ static int __perf_event_overflow(struct perf_event *event, int nmi, perf_event_disable(event); } - perf_event_output(event, nmi, data, regs); + if (event->overflow_handler) + event->overflow_handler(event, nmi, data, regs); + else + perf_event_output(event, nmi, data, regs); + return ret; } @@ -4836,6 +4840,8 @@ inherit_event(struct perf_event *parent_event, if (parent_event->attr.freq) child_event->hw.sample_period = parent_event->hw.sample_period; + child_event->overflow_handler = parent_event->overflow_handler; + /* * Link it up in the child's context: */ |