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authorArnaldo Carvalho de Melo <acme@redhat.com>2011-10-13 08:01:33 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-10-13 08:01:33 -0300
commitdf71d95f86ec7310722f96b6902699f3fe30b439 (patch)
tree39bb03df54fc25cb8032a65f8386585813f50a57
parent900e14a8f5a49e987790b93c7906989b22075f1b (diff)
perf hists: Don't free decayed entries if in the annotation browser
Just let it there till the user exits the annotation browser. 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-nmaxuzreqhm5k10t2co5sk9a@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/hist.c10
-rw-r--r--tools/perf/util/sort.h1
-rw-r--r--tools/perf/util/ui/browsers/hists.c6
3 files changed, 14 insertions, 3 deletions
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 50c8fece168..9b9d12bbdc1 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -100,6 +100,8 @@ static void hist_entry__decay(struct hist_entry *he)
static bool hists__decay_entry(struct hists *hists, struct hist_entry *he)
{
+ if (he->period == 0)
+ return true;
hists->stats.total_period -= he->period;
hist_entry__decay(he);
hists->stats.total_period += he->period;
@@ -114,8 +116,12 @@ void hists__decay_entries(struct hists *hists)
while (next) {
n = rb_entry(next, struct hist_entry, rb_node);
next = rb_next(&n->rb_node);
-
- if (hists__decay_entry(hists, n)) {
+ /*
+ * We may be annotating this, for instance, so keep it here in
+ * 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) {
rb_erase(&n->rb_node, &hists->entries);
if (sort__need_collapse)
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 03851e30172..3f67ae39575 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -64,6 +64,7 @@ struct hist_entry {
bool init_have_children;
char level;
+ bool used;
u8 filtered;
struct symbol *parent;
union {
diff --git a/tools/perf/util/ui/browsers/hists.c b/tools/perf/util/ui/browsers/hists.c
index 9ece8435353..fdc3c90696d 100644
--- a/tools/perf/util/ui/browsers/hists.c
+++ b/tools/perf/util/ui/browsers/hists.c
@@ -976,9 +976,13 @@ do_annotate:
he = hist_browser__selected_entry(browser);
if (he == NULL)
continue;
-
+ /*
+ * Don't let this be freed, say, by hists__decay_entry.
+ */
+ he->used = true;
hist_entry__tui_annotate(he, evsel->idx, nr_events,
timer, arg, delay_secs);
+ he->used = false;
ui_browser__update_nr_entries(&browser->b, browser->hists->nr_entries);
} else if (choice == browse_map)
map__browse(browser->selection->map);