Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

Infrastructure fixes and changes:

  * Fix off-by-one bugs in map->end handling (Stephane Eranian)

  * Fix off-by-one bug in maps__find(), also related to map->end handling (Namhyung Kim)

  * Make struct symbol->end be the first addr after the symbol range, to make it
    match the convention used for struct map->end. (Arnaldo Carvalho de Melo)

  * Fix perf_evlist__add_pollfd() error handling in 'perf kvm stat live' (Jiri Olsa)

  * Fix python test build by moving callchain_param to an object linked into the
    python binding (Jiri Olsa)

  * Do not include a struct hists per perf_evsel, untangling the histogram code
    from perf_evsel, to pave the way for exporting a minimalistic
    tools/lib/api/perf/ library usable by tools/perf and initially by the rasd
    daemon being developed by Borislav Petkov, Robert Richter and Jean Pihet.
    (Arnaldo Carvalho de Melo)

  * Make perf_evlist__open(evlist, NULL, NULL), i.e. without cpu and thread
    maps mean syswide monitoring, reducing the boilerplate for tools that
    only want system wide mode. (Arnaldo Carvalho de Melo)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 7eb7107731ec..5699e7e2a790 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -190,6 +190,32 @@ enum perf_user_event_type { /* above any possible kernel type */
 	PERF_RECORD_HEADER_MAX
 };
 
+/*
+ * The kernel collects the number of events it couldn't send in a stretch and
+ * when possible sends this number in a PERF_RECORD_LOST event. The number of
+ * such "chunks" of lost events is stored in .nr_events[PERF_EVENT_LOST] while
+ * total_lost tells exactly how many events the kernel in fact lost, i.e. it is
+ * the sum of all struct lost_event.lost fields reported.
+ *
+ * The total_period is needed because by default auto-freq is used, so
+ * multipling nr_events[PERF_EVENT_SAMPLE] by a frequency isn't possible to get
+ * the total number of low level events, it is necessary to to sum all struct
+ * sample_event.period and stash the result in total_period.
+ */
+struct events_stats {
+	u64 total_period;
+	u64 total_non_filtered_period;
+	u64 total_lost;
+	u64 total_invalid_chains;
+	u32 nr_events[PERF_RECORD_HEADER_MAX];
+	u32 nr_non_filtered_samples;
+	u32 nr_lost_warned;
+	u32 nr_unknown_events;
+	u32 nr_invalid_chains;
+	u32 nr_unknown_id;
+	u32 nr_unprocessable_samples;
+};
+
 struct attr_event {
 	struct perf_event_header header;
 	struct perf_event_attr attr;