perf top: Add --percent-limit option (fa5df943) · Commits · 戴 / test

tools/perf/Documentation/perf-top.txt

+4 −0

Original line number	Diff line number	Diff line
		@@ -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
		--------------------------

tools/perf/builtin-top.c

+15 −2

Original line number	Diff line number	Diff line
		@@ -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[] = {

tools/perf/ui/browsers/hists.c

+14 −2

Original line number	Diff line number	Diff line
		@@ -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,

tools/perf/util/top.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -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);

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