linux-kernel - [tip:perf/core] perf tools: Fix buildid processing

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Date:	Thu, 20 Aug 2015 03:00:26 -0700
From:	tip-bot for Adrian Hunter <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	mingo@...nel.org, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	adrian.hunter@...el.com, jolsa@...nel.org, hpa@...or.com,
	torvalds@...ux-foundation.org, acme@...hat.com
Subject: [tip:perf/core] perf tools: Fix buildid processing

Commit-ID:  cca8482c0651cea97aade58cc22109ce9fffbfa2
Gitweb:     http://git.kernel.org/tip/cca8482c0651cea97aade58cc22109ce9fffbfa2
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Wed, 19 Aug 2015 17:29:21 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 19 Aug 2015 14:15:26 -0300

perf tools: Fix buildid processing

After recording, 'perf record' post-processes the data to determine
which buildids are needed.

That processing must process the data in time order, if possible,
because otherwise dependent events, like forks and mmaps, will not make
sense.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Tested-by: Jiri Olsa <jolsa@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Link: http://lkml.kernel.org/r/1439994561-27436-4-git-send-email-adrian.hunter@intel.com
[ Moved the sample_id_add to after trying to open the events, use pr_warning ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-record.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index de165a1..20b56eb 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -521,6 +521,15 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 		goto out_child;
 	}
 
+	/*
+	 * Normally perf_session__new would do this, but it doesn't have the
+	 * evlist.
+	 */
+	if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) {
+		pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n");
+		rec->tool.ordered_events = false;
+	}
+
 	if (!rec->evlist->nr_groups)
 		perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
 
@@ -965,9 +974,11 @@ static struct record record = {
 	.tool = {
 		.sample		= process_sample_event,
 		.fork		= perf_event__process_fork,
+		.exit		= perf_event__process_exit,
 		.comm		= perf_event__process_comm,
 		.mmap		= perf_event__process_mmap,
 		.mmap2		= perf_event__process_mmap2,
+		.ordered_events	= true,
 	},
 };
 
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