linux-kernel - [tip:perf/core] perf intel-pt: Move branch filter logic

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Message-ID: <tip-385e33063fb963f5cccb0a37fe539319b6481fa5@git.kernel.org>
Date:	Tue, 29 Sep 2015 01:45:35 -0700
From:	tip-bot for Adrian Hunter <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, adrian.hunter@...el.com, mingo@...nel.org,
	acme@...hat.com, linux-kernel@...r.kernel.org, tglx@...utronix.de,
	jolsa@...hat.com
Subject: [tip:perf/core] perf intel-pt: Move branch filter logic

Commit-ID:  385e33063fb963f5cccb0a37fe539319b6481fa5
Gitweb:     http://git.kernel.org/tip/385e33063fb963f5cccb0a37fe539319b6481fa5
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Fri, 25 Sep 2015 16:15:44 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 28 Sep 2015 16:58:27 -0300

perf intel-pt: Move branch filter logic

intel_pt_synth_branch_sample() skips synthesizing if the branch does not
match the branch filter.  That logic was sitting in the middle of the
function but is more efficiently placed at the start of the function, so
move it.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-14-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/intel-pt.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index c8bb5ca..2c01e72 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -891,6 +891,9 @@ static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq)
 	union perf_event *event = ptq->event_buf;
 	struct perf_sample sample = { .ip = 0, };
 
+	if (pt->branches_filter && !(pt->branches_filter & ptq->flags))
+		return 0;
+
 	event->sample.header.type = PERF_RECORD_SAMPLE;
 	event->sample.header.misc = PERF_RECORD_MISC_USER;
 	event->sample.header.size = sizeof(struct perf_event_header);
@@ -909,9 +912,6 @@ static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq)
 	sample.flags = ptq->flags;
 	sample.insn_len = ptq->insn_len;
 
-	if (pt->branches_filter && !(pt->branches_filter & ptq->flags))
-		return 0;
-
 	if (pt->synth_opts.inject) {
 		ret = intel_pt_inject_event(event, &sample,
 					    pt->branches_sample_type,
--
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