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perf hist: Use cached rbtrees

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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

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20181206191819.30182-7-dave@stgolabs.net
[ Added some missing conversions to rb_first_cached() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Davidlohr Bueso
2018-12-06 11:18:18 -08:00
committed by Arnaldo Carvalho de Melo
parent 7137ff50b6
commit 2eb3d6894a
14 changed files with 173 additions and 147 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/perf/ui/browsers/hists.c
+8 -8
View File
@@ -49,7 +49,7 @@ static int hist_browser__get_folding(struct hist_browser *browser)
struct hists *hists = browser->hists;
int unfolded_rows = 0;
for (nd = rb_first(&hists->entries);
for (nd = rb_first_cached(&hists->entries);
(nd = hists__filter_entries(nd, browser->min_pcnt)) != NULL;
nd = rb_hierarchy_next(nd)) {
struct hist_entry *he =
@@ -267,7 +267,7 @@ static int hierarchy_count_rows(struct hist_browser *hb, struct hist_entry *he,
if (he->has_no_entry)
return 1;
node = rb_first(&he->hroot_out);
node = rb_first_cached(&he->hroot_out);
while (node) {
float percent;
@@ -372,7 +372,7 @@ static void hist_entry__init_have_children(struct hist_entry *he)
he->has_children = !RB_EMPTY_ROOT(&he->sorted_chain);
callchain__init_have_children(&he->sorted_chain);
} else {
he->has_children = !RB_EMPTY_ROOT(&he->hroot_out);
he->has_children = !RB_EMPTY_ROOT(&he->hroot_out.rb_root);
}
he->init_have_children = true;
@@ -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);
tools/perf/ui/gtk/hists.c
+3 -3
View File
@@ -353,7 +353,7 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
g_object_unref(GTK_TREE_MODEL(store));
for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
for (nd = rb_first_cached(&hists->entries); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
GtkTreeIter iter;
u64 total = hists__total_period(h->hists);
@@ -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;
tools/perf/ui/stdio/hist.c
+2 -1
View File
@@ -788,7 +788,8 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
indent = hists__overhead_width(hists) + 4;
for (nd = rb_first(&hists->entries); nd; nd = __rb_hierarchy_next(nd, HMD_FORCE_CHILD)) {
for (nd = rb_first_cached(&hists->entries); nd;
nd = __rb_hierarchy_next(nd, HMD_FORCE_CHILD)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
float percent;