From 87cf8360735e8107198dc7d29a309fefe9eb5452 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 12 May 2020 15:19:17 +0300
Subject: perf evlist: Disable 'immediate' events last

Events marked as 'immediate' are started before other events to ensure
that there is context at the start of the main tracing events. The same
is true at the end of tracing, so disable 'immediate' events after other
events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: x86@kernel.org
Link: http://lore.kernel.org/lkml/20200512121922.8997-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evlist.c | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

(limited to 'tools/perf/util/evlist.c')

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 2a9de6491700..173b4f0e0e6e 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -380,22 +380,33 @@ void evlist__disable(struct evlist *evlist)
 {
 	struct evsel *pos;
 	struct affinity affinity;
-	int cpu, i;
+	int cpu, i, imm = 0;
+	bool has_imm = false;
 
 	if (affinity__setup(&affinity) < 0)
 		return;
 
-	evlist__for_each_cpu(evlist, i, cpu) {
-		affinity__set(&affinity, cpu);
-
-		evlist__for_each_entry(evlist, pos) {
-			if (evsel__cpu_iter_skip(pos, cpu))
-				continue;
-			if (pos->disabled || !evsel__is_group_leader(pos) || !pos->core.fd)
-				continue;
-			evsel__disable_cpu(pos, pos->cpu_iter - 1);
+	/* Disable 'immediate' events last */
+	for (imm = 0; imm <= 1; imm++) {
+		evlist__for_each_cpu(evlist, i, cpu) {
+			affinity__set(&affinity, cpu);
+
+			evlist__for_each_entry(evlist, pos) {
+				if (evsel__cpu_iter_skip(pos, cpu))
+					continue;
+				if (pos->disabled || !evsel__is_group_leader(pos) || !pos->core.fd)
+					continue;
+				if (pos->immediate)
+					has_imm = true;
+				if (pos->immediate != imm)
+					continue;
+				evsel__disable_cpu(pos, pos->cpu_iter - 1);
+			}
 		}
+		if (!has_imm)
+			break;
 	}
+
 	affinity__cleanup(&affinity);
 	evlist__for_each_entry(evlist, pos) {
 		if (!evsel__is_group_leader(pos) || !pos->core.fd)
-- 
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