perf lock contention: Update total/bad stats for hidden entries

When -E option is used, it only prints the given number of entries but
the event stat at the end should have the numbers for entire entries.

Likewise, -S option will hide entries that don't have the named
function in the callstack.  Also update event stat for them.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20230406210611.1622492-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-lock.c

@@ -1726,6 +1726,17 @@ static void print_contention_result(struct lock_contention *con)
 			break;
 	}
 
+	if (print_nr_entries) {
+		/* update the total/bad stats */
+		while ((st = pop_from_result())) {
+			total += use_bpf ? st->nr_contended : 1;
+			if (st->broken)
+				bad++;
+		}
+	}
+	/* some entries are collected but hidden by the callstack filter */
+	total += con->nr_filtered;
+
 	if (use_bpf)
 		print_bpf_events(total, &con->fails);
 	else

tools/perf/util/bpf_lock_contention.c

@@ -299,8 +299,10 @@ int lock_contention_read(struct lock_contention *con)
 		if (con->save_callstack) {
 			bpf_map_lookup_elem(stack, &key.stack_id, stack_trace);
 
-			if (!match_callstack_filter(machine, stack_trace))
+			if (!match_callstack_filter(machine, stack_trace)) {
+				con->nr_filtered += data.count;
 				goto next;
+			}
 		}
 
 		switch (con->aggr_mode) {

tools/perf/util/lock-contention.h

@@ -141,6 +141,7 @@ struct lock_contention {
 	int stack_skip;
 	int aggr_mode;
 	int owner;
+	int nr_filtered;
 	bool save_callstack;
 };