perf browsers: Add live mode to the hists, annotate browsers

This allows passing a timer to be run periodically, which will update
the hists tree that then gers refreshed on the screen, just like the
Live mode (symbol entries, annotation) we already have in 'perf top
--tui'.

Will be used by the new hist_entry/hists based 'top' tool.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-2r44qd8oe4sagzcgoikl8qzc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 69 insertions, 36 deletions

diff --git a/tools/perf/util/ui/browsers/hists.c b/tools/perf/util/ui/browsers/hists.c
index 5d767c622dfc..6244d19bd1f2 100644
--- a/tools/perf/util/ui/browsers/hists.c
+++ b/tools/perf/util/ui/browsers/hists.c
@@ -24,8 +24,14 @@ struct hist_browser {
 	struct hists	    *hists;
 	struct hist_entry   *he_selection;
 	struct map_symbol   *selection;
+	const struct thread *thread_filter;
+	const struct dso    *dso_filter;
 };
 
+static int hists__browser_title(struct hists *self, char *bf, size_t size,
+				const char *ev_name, const struct dso *dso,
+				const struct thread *thread);
+
 static void hist_browser__refresh_dimensions(struct hist_browser *self)
 {
 	/* 3 == +/- toggle symbol before actual hist_entry rendering */
@@ -290,9 +296,12 @@ static void hist_browser__set_folding(struct hist_browser *self, bool unfold)
 	ui_browser__reset_index(&self->b);
 }
 
-static int hist_browser__run(struct hist_browser *self, const char *title)
+static int hist_browser__run(struct hist_browser *self, const char *ev_name,
+			     void(*timer)(void *arg), void *arg, int delay_secs)
 {
 	int key;
+	int delay_msecs = delay_secs * 1000;
+	char title[160];
 	int exit_keys[] = { 'a', '?', 'h', 'C', 'd', 'D', 'E', 't',
 			    NEWT_KEY_ENTER, NEWT_KEY_RIGHT, NEWT_KEY_LEFT,
 			    NEWT_KEY_TAB, NEWT_KEY_UNTAB, 0, };
@@ -301,17 +310,30 @@ static int hist_browser__run(struct hist_browser *self, const char *title)
 	self->b.nr_entries = self->hists->nr_entries;
 
 	hist_browser__refresh_dimensions(self);
+	hists__browser_title(self->hists, title, sizeof(title), ev_name,
+			     self->dso_filter, self->thread_filter);
 
 	if (ui_browser__show(&self->b, title,
 			     "Press '?' for help on key bindings") < 0)
 		return -1;
 
+	if (timer != NULL)
+		newtFormSetTimer(self->b.form, delay_msecs);
+
 	ui_browser__add_exit_keys(&self->b, exit_keys);
 
 	while (1) {
 		key = ui_browser__run(&self->b);
 
 		switch (key) {
+		case -1:
+			/* FIXME we need to check if it was es.reason == NEWT_EXIT_TIMER */
+			timer(arg);
+			hists__browser_title(self->hists, title, sizeof(title),
+					     ev_name, self->dso_filter,
+					     self->thread_filter);
+			ui_browser__show_title(&self->b, title);
+			continue;
 		case 'D': { /* Debug */
 			static int seq;
 			struct hist_entry *h = rb_entry(self->b.top,
@@ -805,14 +827,13 @@ static int hists__browser_title(struct hists *self, char *bf, size_t size,
 
 static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 				    const char *helpline, const char *ev_name,
-				    bool left_exits)
+				    bool left_exits,
+				    void(*timer)(void *arg), void *arg,
+				    int delay_secs)
 {
 	struct hists *self = &evsel->hists;
 	struct hist_browser *browser = hist_browser__new(self);
 	struct pstack *fstack;
-	const struct thread *thread_filter = NULL;
-	const struct dso *dso_filter = NULL;
-	char msg[160];
 	int key = -1;
 
 	if (browser == NULL)
@@ -824,8 +845,6 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 
 	ui_helpline__push(helpline);
 
-	hists__browser_title(self, msg, sizeof(msg), ev_name,
-			     dso_filter, thread_filter);
 	while (1) {
 		const struct thread *thread = NULL;
 		const struct dso *dso = NULL;
@@ -834,7 +853,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 		    annotate = -2, zoom_dso = -2, zoom_thread = -2,
 		    browse_map = -2;
 
-		key = hist_browser__run(browser, msg);
+		key = hist_browser__run(browser, ev_name, timer, arg, delay_secs);
 
 		if (browser->he_selection != NULL) {
 			thread = hist_browser__selected_thread(browser);
@@ -889,9 +908,9 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 				continue;
 			}
 			top = pstack__pop(fstack);
-			if (top == &dso_filter)
+			if (top == &browser->dso_filter)
 				goto zoom_out_dso;
-			if (top == &thread_filter)
+			if (top == &browser->thread_filter)
 				goto zoom_out_thread;
 			continue;
 		}
@@ -913,14 +932,14 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel,
 
 		if (thread != NULL &&
 		    asprintf(&options[nr_options], "Zoom %s %s(%d) thread",
-			     (thread_filter ? "out of" : "into"),
+			     (browser->thread_filter ? "out of" : "into"),
 			     (thread->comm_set ? thread->comm : ""),
 			     thread->pid) > 0)
 			zoom_thread = nr_options++;
 
 		if (dso != NULL &&
 		    asprintf(&options[nr_options], "Zoom %s %s DSO",
-			     (dso_filter ? "out of" : "into"),
+			     (browser->dso_filter ? "out of" : "into"),
 			     (dso->kernel ? "the Kernel" : dso->short_name)) > 0)
 			zoom_dso = nr_options++;
 
@@ -949,45 +968,42 @@ do_annotate:
 			if (he == NULL)
 				continue;
 
-			hist_entry__tui_annotate(he, evsel->idx);
+			hist_entry__tui_annotate(he, evsel->idx,
+						 timer, arg, delay_secs);
 		} else if (choice == browse_map)
 			map__browse(browser->selection->map);
 		else if (choice == zoom_dso) {
 zoom_dso:
-			if (dso_filter) {
-				pstack__remove(fstack, &dso_filter);
+			if (browser->dso_filter) {
+				pstack__remove(fstack, &browser->dso_filter);
 zoom_out_dso:
 				ui_helpline__pop();
-				dso_filter = NULL;
+				browser->dso_filter = NULL;
 			} else {
 				if (dso == NULL)
 					continue;
 				ui_helpline__fpush("To zoom out press <- or -> + \"Zoom out of %s DSO\"",
 						   dso->kernel ? "the Kernel" : dso->short_name);
-				dso_filter = dso;
-				pstack__push(fstack, &dso_filter);
+				browser->dso_filter = dso;
+				pstack__push(fstack, &browser->dso_filter);
 			}
-			hists__filter_by_dso(self, dso_filter);
-			hists__browser_title(self, msg, sizeof(msg), ev_name,
-					     dso_filter, thread_filter);
+			hists__filter_by_dso(self, browser->dso_filter);
 			hist_browser__reset(browser);
 		} else if (choice == zoom_thread) {
 zoom_thread:
-			if (thread_filter) {
-				pstack__remove(fstack, &thread_filter);
+			if (browser->thread_filter) {
+				pstack__remove(fstack, &browser->thread_filter);
 zoom_out_thread:
 				ui_helpline__pop();
-				thread_filter = NULL;
+				browser->thread_filter = NULL;
 			} else {
 				ui_helpline__fpush("To zoom out press <- or -> + \"Zoom out of %s(%d) thread\"",
 						   thread->comm_set ? thread->comm : "",
 						   thread->pid);
-				thread_filter = thread;
-				pstack__push(fstack, &thread_filter);
+				browser->thread_filter = thread;
+				pstack__push(fstack, &browser->thread_filter);
 			}
-			hists__filter_by_thread(self, thread_filter);
-			hists__browser_title(self, msg, sizeof(msg), ev_name,
-					     dso_filter, thread_filter);
+			hists__filter_by_thread(self, browser->thread_filter);
 			hist_browser__reset(browser);
 		}
 	}
@@ -1026,9 +1042,11 @@ static void perf_evsel_menu__write(struct ui_browser *browser,
 		menu->selection = evsel;
 }
 
-static int perf_evsel_menu__run(struct perf_evsel_menu *menu, const char *help)
+static int perf_evsel_menu__run(struct perf_evsel_menu *menu, const char *help,
+				void(*timer)(void *arg), void *arg, int delay_secs)
 {
 	int exit_keys[] = { NEWT_KEY_ENTER, NEWT_KEY_RIGHT, 0, };
+	int delay_msecs = delay_secs * 1000;
 	struct perf_evlist *evlist = menu->b.priv;
 	struct perf_evsel *pos;
 	const char *ev_name, *title = "Available samples";
@@ -1038,20 +1056,29 @@ static int perf_evsel_menu__run(struct perf_evsel_menu *menu, const char *help)
 			     "ESC: exit, ENTER|->: Browse histograms") < 0)
 		return -1;
 
+	if (timer != NULL)
+		newtFormSetTimer(menu->b.form, delay_msecs);
+
 	ui_browser__add_exit_keys(&menu->b, exit_keys);
 
 	while (1) {
 		key = ui_browser__run(&menu->b);
 
 		switch (key) {
+		case -1:
+			/* FIXME we need to check if it was es.reason == NEWT_EXIT_TIMER */
+			timer(arg);
+			continue;
 		case NEWT_KEY_RIGHT:
 		case NEWT_KEY_ENTER:
 			if (!menu->selection)
 				continue;
 			pos = menu->selection;
+			perf_evlist__set_selected(evlist, pos);
 browse_hists:
 			ev_name = event_name(pos);
-			key = perf_evsel__hists_browse(pos, help, ev_name, true);
+			key = perf_evsel__hists_browse(pos, help, ev_name, true,
+						       timer, arg, delay_secs);
 			ui_browser__show_title(&menu->b, title);
 			break;
 		case NEWT_KEY_LEFT:
@@ -1091,7 +1118,9 @@ out:
 }
 
 static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
-					   const char *help)
+					   const char *help,
+					   void(*timer)(void *arg), void *arg,
+					   int delay_secs)
 {
 	struct perf_evsel *pos;
 	struct perf_evsel_menu menu = {
@@ -1121,18 +1150,22 @@ static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
 			pos->name = strdup(ev_name);
 	}
 
-	return perf_evsel_menu__run(&menu, help);
+	return perf_evsel_menu__run(&menu, help, timer, arg, delay_secs);
 }
 
-int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help)
+int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
+				  void(*timer)(void *arg), void *arg,
+				  int delay_secs)
 {
 
 	if (evlist->nr_entries == 1) {
 		struct perf_evsel *first = list_entry(evlist->entries.next,
 						      struct perf_evsel, node);
 		const char *ev_name = event_name(first);
-		return perf_evsel__hists_browse(first, help, ev_name, false);
+		return perf_evsel__hists_browse(first, help, ev_name, false,
+						timer, arg, delay_secs);
 	}
 
-	return __perf_evlist__tui_browse_hists(evlist, help);
+	return __perf_evlist__tui_browse_hists(evlist, help,
+					       timer, arg, delay_secs);
 }