perf report: Add --percent-limit option
The --percent-limit option is for not showing small overhead entries in
the output. Maybe we want to set a certain default value like 0.1.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1368497347-9628-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 7d5f4f3..66dab74 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -210,6 +210,10 @@
Demangle symbol names to human readable form. It's enabled by default,
disable with --no-demangle.
+--percent-limit::
+ Do not show entries which have an overhead under that percent.
+ (Default: 0).
+
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-annotate[1]
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index cabbea5..a9d63c1 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -457,7 +457,7 @@
hists__output_resort(new);
}
- hists__fprintf(new, true, 0, 0, stdout);
+ hists__fprintf(new, true, 0, 0, 0, stdout);
}
static int __cmd_diff(void)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 0f0cf24..0a4979b 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -52,6 +52,7 @@
symbol_filter_t annotate_init;
const char *cpu_list;
const char *symbol_filter_str;
+ float min_percent;
DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
};
@@ -456,7 +457,7 @@
continue;
hists__fprintf_nr_sample_events(rep, hists, evname, stdout);
- hists__fprintf(hists, true, 0, 0, stdout);
+ hists__fprintf(hists, true, 0, 0, rep->min_percent, stdout);
fprintf(stdout, "\n\n");
}
@@ -575,8 +576,8 @@
if (use_browser > 0) {
if (use_browser == 1) {
ret = perf_evlist__tui_browse_hists(session->evlist,
- help,
- NULL,
+ help, NULL,
+ rep->min_percent,
&session->header.env);
/*
* Usually "ret" is the last pressed key, and we only
@@ -587,7 +588,7 @@
} else if (use_browser == 2) {
perf_evlist__gtk_browse_hists(session->evlist, help,
- NULL);
+ NULL, rep->min_percent);
}
} else
perf_evlist__tty_browse_hists(session->evlist, rep, help);
@@ -698,6 +699,16 @@
return 0;
}
+static int
+parse_percent_limit(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ struct perf_report *rep = opt->value;
+
+ rep->min_percent = strtof(str, NULL);
+ return 0;
+}
+
int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct perf_session *session;
@@ -807,6 +818,8 @@
OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
"Disable symbol demangling"),
OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),
+ OPT_CALLBACK(0, "percent-limit", &report, "percent",
+ "Don't show entries under that percent", parse_percent_limit),
OPT_END()
};
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index c2c9734..19fe25f 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -296,7 +296,7 @@
top->print_entries - printed);
putchar('\n');
hists__fprintf(&top->sym_evsel->hists, false,
- top->print_entries - printed, win_width, stdout);
+ top->print_entries - printed, win_width, 0, stdout);
}
static void prompt_integer(int *target, const char *msg)
@@ -580,7 +580,7 @@
list_for_each_entry(pos, &top->evlist->entries, node)
pos->hists.uid_filter_str = top->record_opts.target.uid_str;
- perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
+ perf_evlist__tui_browse_hists(top->evlist, help, &hbt, 0,
&top->session->header.env);
done = 1;
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index a4268ca..9dfde61 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -25,6 +25,8 @@
struct map_symbol *selection;
int print_seq;
bool show_dso;
+ float min_pcnt;
+ u64 nr_pcnt_entries;
};
extern void hist_browser__init_hpp(void);
@@ -317,6 +319,8 @@
browser->b.entries = &browser->hists->entries;
browser->b.nr_entries = browser->hists->nr_entries;
+ if (browser->min_pcnt)
+ browser->b.nr_entries = browser->nr_pcnt_entries;
hist_browser__refresh_dimensions(browser);
hists__browser_title(browser->hists, title, sizeof(title), ev_name);
@@ -795,10 +799,15 @@
for (nd = browser->top; nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+ float percent = h->stat.period * 100.0 /
+ hb->hists->stats.total_period;
if (h->filtered)
continue;
+ if (percent < hb->min_pcnt)
+ continue;
+
row += hist_browser__show_entry(hb, h, row);
if (row == browser->height)
break;
@@ -807,10 +816,18 @@
return row;
}
-static struct rb_node *hists__filter_entries(struct rb_node *nd)
+static struct rb_node *hists__filter_entries(struct rb_node *nd,
+ struct hists *hists,
+ float min_pcnt)
{
while (nd != NULL) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+ float percent = h->stat.period * 100.0 /
+ hists->stats.total_period;
+
+ if (percent < min_pcnt)
+ return NULL;
+
if (!h->filtered)
return nd;
@@ -820,11 +837,16 @@
return NULL;
}
-static struct rb_node *hists__filter_prev_entries(struct rb_node *nd)
+static struct rb_node *hists__filter_prev_entries(struct rb_node *nd,
+ struct hists *hists,
+ float min_pcnt)
{
while (nd != NULL) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
- if (!h->filtered)
+ float percent = h->stat.period * 100.0 /
+ hists->stats.total_period;
+
+ if (!h->filtered && percent >= min_pcnt)
return nd;
nd = rb_prev(nd);
@@ -839,6 +861,9 @@
struct hist_entry *h;
struct rb_node *nd;
bool first = true;
+ struct hist_browser *hb;
+
+ hb = container_of(browser, struct hist_browser, b);
if (browser->nr_entries == 0)
return;
@@ -847,13 +872,15 @@
switch (whence) {
case SEEK_SET:
- nd = hists__filter_entries(rb_first(browser->entries));
+ nd = hists__filter_entries(rb_first(browser->entries),
+ hb->hists, hb->min_pcnt);
break;
case SEEK_CUR:
nd = browser->top;
goto do_offset;
case SEEK_END:
- nd = hists__filter_prev_entries(rb_last(browser->entries));
+ nd = hists__filter_prev_entries(rb_last(browser->entries),
+ hb->hists, hb->min_pcnt);
first = false;
break;
default:
@@ -896,7 +923,8 @@
break;
}
}
- nd = hists__filter_entries(rb_next(nd));
+ nd = hists__filter_entries(rb_next(nd), hb->hists,
+ hb->min_pcnt);
if (nd == NULL)
break;
--offset;
@@ -929,7 +957,8 @@
}
}
- nd = hists__filter_prev_entries(rb_prev(nd));
+ nd = hists__filter_prev_entries(rb_prev(nd), hb->hists,
+ hb->min_pcnt);
if (nd == NULL)
break;
++offset;
@@ -1098,14 +1127,17 @@
static int hist_browser__fprintf(struct hist_browser *browser, FILE *fp)
{
- struct rb_node *nd = hists__filter_entries(rb_first(browser->b.entries));
+ struct rb_node *nd = hists__filter_entries(rb_first(browser->b.entries),
+ browser->hists,
+ browser->min_pcnt);
int printed = 0;
while (nd) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
printed += hist_browser__fprintf_entry(browser, h, fp);
- nd = hists__filter_entries(rb_next(nd));
+ nd = hists__filter_entries(rb_next(nd), browser->hists,
+ browser->min_pcnt);
}
return printed;
@@ -1324,11 +1356,25 @@
return ret;
}
+static void hist_browser__update_pcnt_entries(struct hist_browser *hb)
+{
+ u64 nr_entries = 0;
+ struct rb_node *nd = rb_first(&hb->hists->entries);
+
+ while (nd) {
+ nr_entries++;
+ nd = hists__filter_entries(rb_next(nd), hb->hists,
+ hb->min_pcnt);
+ }
+
+ hb->nr_pcnt_entries = nr_entries;
+}
static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
const char *helpline, const char *ev_name,
bool left_exits,
struct hist_browser_timer *hbt,
+ float min_pcnt,
struct perf_session_env *env)
{
struct hists *hists = &evsel->hists;
@@ -1345,6 +1391,11 @@
if (browser == NULL)
return -1;
+ if (min_pcnt) {
+ browser->min_pcnt = min_pcnt;
+ hist_browser__update_pcnt_entries(browser);
+ }
+
fstack = pstack__new(2);
if (fstack == NULL)
goto out;
@@ -1684,6 +1735,7 @@
struct ui_browser b;
struct perf_evsel *selection;
bool lost_events, lost_events_warned;
+ float min_pcnt;
struct perf_session_env *env;
};
@@ -1777,6 +1829,7 @@
ev_name = perf_evsel__name(pos);
key = perf_evsel__hists_browse(pos, nr_events, help,
ev_name, true, hbt,
+ menu->min_pcnt,
menu->env);
ui_browser__show_title(&menu->b, title);
switch (key) {
@@ -1838,6 +1891,7 @@
static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
int nr_entries, const char *help,
struct hist_browser_timer *hbt,
+ float min_pcnt,
struct perf_session_env *env)
{
struct perf_evsel *pos;
@@ -1851,6 +1905,7 @@
.nr_entries = nr_entries,
.priv = evlist,
},
+ .min_pcnt = min_pcnt,
.env = env,
};
@@ -1869,6 +1924,7 @@
int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
struct hist_browser_timer *hbt,
+ float min_pcnt,
struct perf_session_env *env)
{
int nr_entries = evlist->nr_entries;
@@ -1880,7 +1936,8 @@
const char *ev_name = perf_evsel__name(first);
return perf_evsel__hists_browse(first, nr_entries, help,
- ev_name, false, hbt, env);
+ ev_name, false, hbt, min_pcnt,
+ env);
}
if (symbol_conf.event_group) {
@@ -1896,5 +1953,5 @@
}
return __perf_evlist__tui_browse_hists(evlist, nr_entries, help,
- hbt, env);
+ hbt, min_pcnt, env);
}
diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
index 6f259b3..9708dd5 100644
--- a/tools/perf/ui/gtk/hists.c
+++ b/tools/perf/ui/gtk/hists.c
@@ -124,7 +124,8 @@
perf_gtk__hpp_color_overhead_guest_us;
}
-static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
+static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
+ float min_pcnt)
{
struct perf_hpp_fmt *fmt;
GType col_types[MAX_COLUMNS];
@@ -189,10 +190,15 @@
for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
GtkTreeIter iter;
+ float percent = h->stat.period * 100.0 /
+ hists->stats.total_period;
if (h->filtered)
continue;
+ if (percent < min_pcnt)
+ continue;
+
gtk_list_store_append(store, &iter);
col_idx = 0;
@@ -222,7 +228,8 @@
int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist,
const char *help,
- struct hist_browser_timer *hbt __maybe_unused)
+ struct hist_browser_timer *hbt __maybe_unused,
+ float min_pcnt)
{
struct perf_evsel *pos;
GtkWidget *vbox;
@@ -286,7 +293,7 @@
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
- perf_gtk__show_hists(scrolled_window, hists);
+ perf_gtk__show_hists(scrolled_window, hists, min_pcnt);
tab_label = gtk_label_new(evname);
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index ff1f60c..ae7a754 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -334,7 +334,7 @@
}
size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
- int max_cols, FILE *fp)
+ int max_cols, float min_pcnt, FILE *fp)
{
struct perf_hpp_fmt *fmt;
struct sort_entry *se;
@@ -440,10 +440,15 @@
print_entries:
for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+ float percent = h->stat.period * 100.0 /
+ hists->stats.total_period;
if (h->filtered)
continue;
+ if (percent < min_pcnt)
+ continue;
+
ret += hist_entry__fprintf(h, max_cols, hists, fp);
if (max_rows && ++nr_rows >= max_rows)
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index bd81d79..2d3790f 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -115,7 +115,7 @@
size_t events_stats__fprintf(struct events_stats *stats, FILE *fp);
size_t hists__fprintf(struct hists *self, bool show_header, int max_rows,
- int max_cols, FILE *fp);
+ int max_cols, float min_pcnt, FILE *fp);
int hist_entry__inc_addr_samples(struct hist_entry *self, int evidx, u64 addr);
int hist_entry__annotate(struct hist_entry *self, size_t privsize);
@@ -195,6 +195,7 @@
int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
struct hist_browser_timer *hbt,
+ float min_pcnt,
struct perf_session_env *env);
int script_browse(const char *script_opt);
#else
@@ -202,6 +203,7 @@
int perf_evlist__tui_browse_hists(struct perf_evlist *evlist __maybe_unused,
const char *help __maybe_unused,
struct hist_browser_timer *hbt __maybe_unused,
+ float min_pcnt __maybe_unused,
struct perf_session_env *env __maybe_unused)
{
return 0;
@@ -229,12 +231,14 @@
#ifdef GTK2_SUPPORT
int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist, const char *help,
- struct hist_browser_timer *hbt __maybe_unused);
+ struct hist_browser_timer *hbt __maybe_unused,
+ float min_pcnt);
#else
static inline
int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist __maybe_unused,
const char *help __maybe_unused,
- struct hist_browser_timer *hbt __maybe_unused)
+ struct hist_browser_timer *hbt __maybe_unused,
+ float min_pcnt __maybe_unused)
{
return 0;
}
