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perf/ftrace: Optimize perf/tracepoint interaction for single events

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When we've got but a single event per tracepoint
there is no reason to try and multiplex it so don't.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-05-18 18:08:32 +02:00 • committed by Ingo Molnar
commit 4f41c013f5
7 changed files with 31 additions and 18 deletions
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2
include/linux/perf_event.h
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@ -994,7 +994,7 @@ 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);
int entry_size, struct pt_regs *regs, void *event);
extern void perf_bp_event(struct perf_event *event, void *data);
#ifndef perf_misc_flags