perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track events
Avoid the swevent hash-table by using per-tracepoint
hlists.
Also, avoid conditionals on the fast path by ordering
with probe unregister so that we should never get on
the callback path without the data being there.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <20100521090710.473188012@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index fe50347..7cd7b35 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -727,6 +727,7 @@
perf_overflow_handler_t overflow_handler;
#ifdef CONFIG_EVENT_TRACING
+ struct ftrace_event_call *tp_event;
struct event_filter *filter;
#endif
@@ -992,8 +993,9 @@
}
extern void perf_event_init(void);
-extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
- int entry_size, struct pt_regs *regs, void *event);
+extern void perf_tp_event(u64 addr, u64 count, void *record,
+ int entry_size, struct pt_regs *regs,
+ struct hlist_head *head);
extern void perf_bp_event(struct perf_event *event, void *data);
#ifndef perf_misc_flags