Em Thu, Dec 06, 2018 at 11:18:18AM -0800, Davidlohr Bueso escreveu:
> At the cost of an extra pointer, we can avoid the O(logN) cost
> of finding the first element in the tree (smallest node), which
> is something heavily required for histograms. Specifically, the
> following are converted to rb_root_cached, and users accordingly:
>
> hist::entries_in_array
> hist::entries_in
> hist::entries
> hist::entries_collapsed
> hist_entry::hroot_in
> hist_entry::hroot_out
CC /tmp/build/perf/util/hist.o
ui/browsers/hists.c: In function ‘hierarchy_set_folding’:
ui/browsers/hists.c:511:21: error: passing argument 1 of ‘rb_first’ from
incompatible pointer type [-Werror=incompatible-pointer-types]
for (nd = rb_first(&he->hroot_out); nd; nd = rb_next(nd)) {
^~~~~~~~~~~~~~
In file included from ui/browsers/hists.c:8:
/home/acme/git/perf/tools/include/linux/rbtree.h:83:24: note: expected ‘const
struct rb_root *’ but argument is of type ‘struct rb_root_cached *’
extern struct rb_node *rb_first(const struct rb_root *);
^~~~~~~~
ui/browsers/hists.c: In function ‘__hist_browser__set_folding’:
ui/browsers/hists.c:569:16: error: passing argument 1 of ‘rb_first’ from
incompatible pointer type [-Werror=incompatible-pointer-types]
nd = rb_first(&browser->hists->entries);
^~~~~~~~~~~~~~~~~~~~~~~~
So I added this on top, please check:
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index f8913723a99a..85790a4d1842 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -508,7 +508,7 @@ static int hierarchy_set_folding(struct hist_browser *hb,
struct hist_entry *he,
struct hist_entry *child;
int n = 0;
- for (nd = rb_first(&he->hroot_out); nd; nd = rb_next(nd)) {
+ for (nd = rb_first_cached(&he->hroot_out); nd; nd = rb_next(nd)) {
child = rb_entry(nd, struct hist_entry, rb_node);
percent = hist_entry__get_percent_limit(child);
if (!child->filtered && percent >= hb->min_pcnt)
@@ -566,7 +566,7 @@ __hist_browser__set_folding(struct hist_browser *browser,
bool unfold)
struct rb_node *nd;
struct hist_entry *he;
- nd = rb_first(&browser->hists->entries);
+ nd = rb_first_cached(&browser->hists->entries);
while (nd) {
he = rb_entry(nd, struct hist_entry, rb_node);
@@ -1738,7 +1738,7 @@ static void ui_browser__hists_init_top(struct ui_browser
*browser)
struct hist_browser *hb;
hb = container_of(browser, struct hist_browser, b);
- browser->top = rb_first(&hb->hists->entries);
+ browser->top = rb_first_cached(&hb->hists->entries);
}
}
@@ -2649,7 +2649,7 @@ add_socket_opt(struct hist_browser *browser, struct
popup_action *act,
static void hist_browser__update_nr_entries(struct hist_browser *hb)
{
u64 nr_entries = 0;
- struct rb_node *nd = rb_first(&hb->hists->entries);
+ struct rb_node *nd = rb_first_cached(&hb->hists->entries);
if (hb->min_pcnt == 0 && !symbol_conf.report_hierarchy) {
hb->nr_non_filtered_entries =
hb->hists->nr_non_filtered_entries;
@@ -2669,7 +2669,7 @@ static void hist_browser__update_percent_limit(struct
hist_browser *hb,
double percent)
{
struct hist_entry *he;
- struct rb_node *nd = rb_first(&hb->hists->entries);
+ struct rb_node *nd = rb_first_cached(&hb->hists->entries);
u64 total = hists__total_period(hb->hists);
u64 min_callchain_hits = total * (percent / 100);
diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
index dfab3deef028..74414ccd8c84 100644
--- a/tools/perf/ui/gtk/hists.c
+++ b/tools/perf/ui/gtk/hists.c
@@ -401,7 +401,7 @@ static void perf_gtk__show_hists(GtkWidget *window, struct
hists *hists,
}
static void perf_gtk__add_hierarchy_entries(struct hists *hists,
- struct rb_root *root,
+ struct rb_root_cached *root,
GtkTreeStore *store,
GtkTreeIter *parent,
struct perf_hpp *hpp,
@@ -415,7 +415,7 @@ static void perf_gtk__add_hierarchy_entries(struct hists
*hists,
u64 total = hists__total_period(hists);
int size;
- for (node = rb_first(root); node; node = rb_next(node)) {
+ for (node = rb_first_cached(root); node; node = rb_next(node)) {
GtkTreeIter iter;
float percent;
char *bf;
@@ -578,7 +578,7 @@ static void perf_gtk__show_hierarchy(GtkWidget *window,
struct hists *hists,
gtk_tree_view_set_model(GTK_TREE_VIEW(view), GTK_TREE_MODEL(store));
g_object_unref(GTK_TREE_MODEL(store));
- perf_gtk__add_hierarchy_entries(hists, &hists->entries.rb_root, store,
+ perf_gtk__add_hierarchy_entries(hists, &hists->entries, store,
NULL, &hpp, min_pcnt);
gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(view), TRUE);
