perf top: Honour --hide_{user,kernel}_symbols and the 'U' hotkey

The new decay routine (__hists__decay_entries) wasn't being passed the
toggles, fix it.
Reported-by: NMike Galbraith <efault@gmx.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-hg6m0mi1colket982oq9hhly@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-top.c

@@ -304,7 +304,9 @@ static void print_sym_table(void)
 
 	hists__collapse_resort_threaded(&top.sym_evsel->hists);
 	hists__output_resort_threaded(&top.sym_evsel->hists);
-	hists__decay_entries_threaded(&top.sym_evsel->hists);
+	hists__decay_entries_threaded(&top.sym_evsel->hists,
+				      top.hide_user_symbols,
+				      top.hide_kernel_symbols);
 	hists__output_recalc_col_len(&top.sym_evsel->hists, winsize.ws_row - 3);
 	putchar('\n');
 	hists__fprintf(&top.sym_evsel->hists, NULL, false, false,
@@ -555,7 +557,9 @@ static void perf_top__sort_new_samples(void *arg)
 
 	hists__collapse_resort_threaded(&t->sym_evsel->hists);
 	hists__output_resort_threaded(&t->sym_evsel->hists);
-	hists__decay_entries_threaded(&t->sym_evsel->hists);
+	hists__decay_entries_threaded(&t->sym_evsel->hists,
+				      top.hide_user_symbols,
+				      top.hide_kernel_symbols);
 	hists__output_recalc_col_len(&t->sym_evsel->hists, winsize.ws_row - 3);
 }
 

tools/perf/util/hist.c

@@ -108,7 +108,8 @@ static bool hists__decay_entry(struct hists *hists, struct hist_entry *he)
 	return he->period == 0;
 }
 
-static void __hists__decay_entries(struct hists *hists, bool threaded)
+static void __hists__decay_entries(struct hists *hists, bool zap_user,
+				   bool zap_kernel, bool threaded)
 {
 	struct rb_node *next = rb_first(&hists->entries);
 	struct hist_entry *n;
@@ -121,7 +122,10 @@ static void __hists__decay_entries(struct hists *hists, bool threaded)
 		 * case some it gets new samples, we'll eventually free it when
 		 * the user stops browsing and it agains gets fully decayed.
 		 */
-		if (hists__decay_entry(hists, n) && !n->used) {
+		if (((zap_user && n->level == '.') ||
+		     (zap_kernel && n->level != '.') ||
+		     hists__decay_entry(hists, n)) &&
+		    !n->used) {
 			rb_erase(&n->rb_node, &hists->entries);
 
 			if (sort__need_collapse || threaded)
@@ -133,14 +137,15 @@ static void __hists__decay_entries(struct hists *hists, bool threaded)
 	}
 }
 
-void hists__decay_entries(struct hists *hists)
+void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel)
 {
-	return __hists__decay_entries(hists, false);
+	return __hists__decay_entries(hists, zap_user, zap_kernel, false);
 }
 
-void hists__decay_entries_threaded(struct hists *hists)
+void hists__decay_entries_threaded(struct hists *hists,
+				   bool zap_user, bool zap_kernel)
 {
-	return __hists__decay_entries(hists, true);
+	return __hists__decay_entries(hists, zap_user, zap_kernel, true);
 }
 
 /*

tools/perf/util/hist.h

@@ -78,8 +78,9 @@ void hists__output_resort_threaded(struct hists *hists);
 void hists__collapse_resort(struct hists *self);
 void hists__collapse_resort_threaded(struct hists *hists);
 
-void hists__decay_entries(struct hists *hists);
-void hists__decay_entries_threaded(struct hists *hists);
+void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel);
+void hists__decay_entries_threaded(struct hists *hists, bool zap_user,
+				   bool zap_kernel);
 void hists__output_recalc_col_len(struct hists *hists, int max_rows);
 
 void hists__inc_nr_events(struct hists *self, u32 type);