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perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track events

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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>
This commit is contained in:
Peter Zijlstra
2010-05-19 14:02:22 +02:00
committed by Ingo Molnar
parent b7e2ecef92
commit 1c024eca51
7 changed files with 148 additions and 129 deletions
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6
include/linux/perf_event.h
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@ -727,6 +727,7 @@ struct perf_event {
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 @@ static inline bool perf_paranoid_kernel(void)
}
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