From: Namhyung Kim <namhyung....@lge.com>
The --percent-limit option is for not showing small overheaded entries
in the output.
Cc: Andi Kleen <a...@firstfloor.org>
Acked-by: Pekka Enberg <penb...@kernel.org>
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
tools/perf/Documentation/perf-top.txt | 4 ++++
tools/perf/builtin-top.c | 17 +++++++++++++++--
tools/perf/ui/browsers/hists.c | 16 ++++++++++++++--
tools/perf/util/top.h | 1 +
4 files changed, 34 insertions(+), 4 deletions(-)
diff --git a/tools/perf/Documentation/perf-top.txt
b/tools/perf/Documentation/perf-top.txt
index 9f1a2fe54757..7fdd1909e376 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -155,6 +155,10 @@ Default is to monitor all CPUS.
Default: fractal,0.5,callee.
+--percent-limit::
+ Do not show entries which have an overhead under that percent.
+ (Default: 0).
+
INTERACTIVE PROMPTING KEYS
--------------------------
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 19fe25f6e4f0..f036af9b6f09 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -296,7 +296,8 @@ static void perf_top__print_sym_table(struct perf_top *top)
top->print_entries - printed);
putchar('\n');
hists__fprintf(&top->sym_evsel->hists, false,
- top->print_entries - printed, win_width, 0, stdout);
+ top->print_entries - printed, win_width,
+ top->min_percent, stdout);
}
static void prompt_integer(int *target, const char *msg)
@@ -580,7 +581,7 @@ static void *display_thread_tui(void *arg)
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, 0,
+ perf_evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,
&top->session->header.env);
done = 1;
@@ -1021,6 +1022,16 @@ parse_callchain_opt(const struct option *opt, const char
*arg, int unset)
return record_parse_callchain_opt(opt, arg, unset);
}
+static int
+parse_percent_limit(const struct option *opt, const char *arg,
+ int unset __maybe_unused)
+{
+ struct perf_top *top = opt->value;
+
+ top->min_percent = strtof(arg, NULL);
+ return 0;
+}
+
int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
{
int status;
@@ -1106,6 +1117,8 @@ int cmd_top(int argc, const char **argv, const char
*prefix __maybe_unused)
OPT_STRING('M', "disassembler-style", &disassembler_style,
"disassembler style",
"Specify disassembler style (e.g. -M intel for intel
syntax)"),
OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
+ OPT_CALLBACK(0, "percent-limit", &top, "percent",
+ "Don't show entries under that percent",
parse_percent_limit),
OPT_END()
};
const char * const top_usage[] = {
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 9dfde61505cc..fc0bd3843d34 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -310,6 +310,8 @@ static void ui_browser__warn_lost_events(struct ui_browser
*browser)
"Or reduce the sampling frequency.");
}
+static void hist_browser__update_pcnt_entries(struct hist_browser *hb);
+
static int hist_browser__run(struct hist_browser *browser, const char *ev_name,
struct hist_browser_timer *hbt)
{
@@ -333,9 +335,18 @@ static int hist_browser__run(struct hist_browser *browser,
const char *ev_name,
key = ui_browser__run(&browser->b, delay_secs);
switch (key) {
- case K_TIMER:
+ case K_TIMER: {
+ u64 nr_entries;
hbt->timer(hbt->arg);
- ui_browser__update_nr_entries(&browser->b,
browser->hists->nr_entries);
+
+ if (browser->min_pcnt) {
+ hist_browser__update_pcnt_entries(browser);
+ nr_entries = browser->nr_pcnt_entries;
+ } else {
+ nr_entries = browser->hists->nr_entries;
+ }
+
+ ui_browser__update_nr_entries(&browser->b, nr_entries);
if (browser->hists->stats.nr_lost_warned !=
browser->hists->stats.nr_events[PERF_RECORD_LOST]) {
@@ -347,6 +358,7 @@ static int hist_browser__run(struct hist_browser *browser,
const char *ev_name,
hists__browser_title(browser->hists, title,
sizeof(title), ev_name);
ui_browser__show_title(&browser->b, title);
continue;
+ }
case 'D': { /* Debug */
static int seq;
struct hist_entry *h = rb_entry(browser->b.top,
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index f0a862539ba9..df46be93d902 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -36,6 +36,7 @@ struct perf_top {
int realtime_prio;
int sym_pcnt_filter;
const char *sym_filter;
+ float min_percent;
};
size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size);
--
1.7.11.7
--
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