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From: Andi Kleen <andi@firstfloor.org>
To: acme@kernel.org
Cc: linux-kernel@vger.kernel.org, jolsa@kernel.org,
	eranian@google.com, kan.liang@linux.intel.com,
	peterz@infradead.org, Andi Kleen <ak@linux.intel.com>
Subject: [PATCH v2 5/9] perf evsel: Add iterator to iterate over events ordered by CPU
Date: Sun, 20 Oct 2019 10:51:58 -0700	[thread overview]
Message-ID: <20191020175202.32456-6-andi@firstfloor.org> (raw)
In-Reply-To: <20191020175202.32456-1-andi@firstfloor.org>

From: Andi Kleen <ak@linux.intel.com>

Add some common code that is needed to iterate over all events
in CPU order. Used in followon patches

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 tools/perf/util/evlist.c | 33 +++++++++++++++++++++++++++++++++
 tools/perf/util/evlist.h |  4 ++++
 tools/perf/util/evsel.h  |  1 +
 3 files changed, 38 insertions(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 21b77efa802c..27b4b958eddd 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -341,6 +341,39 @@ static int perf_evlist__nr_threads(struct evlist *evlist,
 		return perf_thread_map__nr(evlist->core.threads);
 }
 
+struct perf_cpu_map *evlist__cpu_iter_start(struct evlist *evlist)
+{
+	struct perf_cpu_map *cpus;
+	struct evsel *pos;
+
+	/*
+	 * evlist->cpus is not necessarily a superset of all the
+	 * event's cpus, so compute our own super set. This
+	 * assume that there is a super set
+	 */
+	cpus = evlist->core.cpus;
+	evlist__for_each_entry(evlist, pos) {
+		pos->cpu_index = 0;
+		if (pos->core.cpus->nr > cpus->nr)
+			cpus = pos->core.cpus;
+	}
+	return cpus;
+}
+
+bool evlist__cpu_iter_skip(struct evsel *ev, int cpu)
+{
+	if (ev->cpu_index >= ev->core.cpus->nr)
+		return true;
+	if (cpu >= 0 && ev->core.cpus->map[ev->cpu_index] != cpu)
+		return true;
+	return false;
+}
+
+void evlist__cpu_iter_next(struct evsel *ev)
+{
+	ev->cpu_index++;
+}
+
 void evlist__disable(struct evlist *evlist)
 {
 	struct evsel *pos;
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 13051409fd22..c1deb8ebdcea 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -336,6 +336,10 @@ void perf_evlist__to_front(struct evlist *evlist,
 void perf_evlist__set_tracking_event(struct evlist *evlist,
 				     struct evsel *tracking_evsel);
 
+struct perf_cpu_map *evlist__cpu_iter_start(struct evlist *evlist);
+bool evlist__cpu_iter_skip(struct evsel *ev, int cpu);
+void evlist__cpu_iter_next(struct evsel *ev);
+
 struct evsel *
 perf_evlist__find_evsel_by_str(struct evlist *evlist, const char *str);
 
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index ddc5ee6f6592..cf90019ae744 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -95,6 +95,7 @@ struct evsel {
 	bool			collect_stat;
 	bool			weak_group;
 	bool			percore;
+	int			cpu_index;
 	const char		*pmu_name;
 	struct {
 		perf_evsel__sb_cb_t	*cb;
-- 
2.21.0


  parent reply	other threads:[~2019-10-20 17:52 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-20 17:51 Optimize perf stat for large number of events/cpus v2 Andi Kleen
2019-10-20 17:51 ` [PATCH v2 1/9] perf evsel: Always preserve errno while cleaning up perf_event_open failures Andi Kleen
2019-10-22  8:01   ` Jiri Olsa
2019-11-12 11:18   ` [tip: perf/core] " tip-bot2 for Andi Kleen
2019-10-20 17:51 ` [PATCH v2 2/9] perf evsel: Avoid close(-1) Andi Kleen
2019-10-22  8:01   ` Jiri Olsa
2019-11-12 11:18   ` [tip: perf/core] " tip-bot2 for Andi Kleen
2019-10-20 17:51 ` [PATCH v2 3/9] perf pmu: Use file system cache to optimize sysfs access Andi Kleen
2019-10-23  9:47   ` Jiri Olsa
2019-10-20 17:51 ` [PATCH v2 4/9] perf affinity: Add infrastructure to save/restore affinity Andi Kleen
2019-10-23  9:59   ` Jiri Olsa
2019-10-23 13:02     ` Andi Kleen
2019-10-23 14:30       ` Jiri Olsa
2019-10-23 14:52         ` Andi Kleen
2019-10-23 16:16           ` Alexey Budankov
2019-10-23 17:19             ` Andi Kleen
2019-10-23 18:08               ` Alexey Budankov
2019-10-23 22:37                 ` Andi Kleen
2019-10-24  8:46                   ` Alexey Budankov
2019-10-20 17:51 ` Andi Kleen [this message]
2019-10-20 17:51 ` [PATCH v2 6/9] perf stat: Use affinity for closing file descriptors Andi Kleen
2019-10-20 17:52 ` [PATCH v2 7/9] perf stat: Use affinity for opening events Andi Kleen
2019-10-20 17:52 ` [PATCH v2 8/9] perf stat: Use affinity for reading Andi Kleen
2019-10-20 17:52 ` [PATCH v2 9/9] perf stat: Use affinity for enabling/disabling events Andi Kleen
2019-10-23 10:30   ` Jiri Olsa
2019-10-23 13:07     ` Andi Kleen
2019-10-22  8:02 ` Optimize perf stat for large number of events/cpus v2 Jiri Olsa
2019-10-22 14:11   ` Arnaldo Carvalho de Melo

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