perf hists browser: Zoom in/out for processor socket

Currently, users can zoom in/out for threads and dso in 'perf top' and
'perf report'.

This patch extends it for the processor sockets.

'S' is the short key to zoom into current Processor Socket.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1441377946-44429-4-git-send-email-kan.liang@intel.com
[ - Made it elide the Socket column when zooming into it,
    just like with the other zoom ops;
  - Make it use browser->pstack, to unzoom level by level;
  - Rename 'socket' variables to 'socket_id' to make it build on
    older systems where it shadows a global glibc declaration ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 54 insertions, 7 deletions

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 792dcf5..380e908 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1261,7 +1261,7 @@ static int hists__browser_title(struct hists *hists,
 	int printed;
 	const struct dso *dso = hists->dso_filter;
 	const struct thread *thread = hists->thread_filter;
-	int socket = hists->socket_filter;
+	int socket_id = hists->socket_filter;
 	unsigned long nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
 	u64 nr_events = hists->stats.total_period;
 	struct perf_evsel *evsel = hists_to_evsel(hists);
@@ -1315,9 +1315,9 @@ static int hists__browser_title(struct hists *hists,
 	if (dso)
 		printed += scnprintf(bf + printed, size - printed,
 				    ", DSO: %s", dso->short_name);
-	if (socket > -1)
+	if (socket_id > -1)
 		printed += scnprintf(bf + printed, size - printed,
-				    ", Processor Socket: %d", socket);
+				    ", Processor Socket: %d", socket_id);
 	if (!is_report_browser(hbt)) {
 		struct perf_top *top = hbt->arg;
 
@@ -1429,6 +1429,7 @@ struct popup_action {
 	struct thread 		*thread;
 	struct dso		*dso;
 	struct map_symbol 	ms;
+	int			socket;
 
 	int (*fn)(struct hist_browser *browser, struct popup_action *act);
 };
@@ -1676,6 +1677,41 @@ add_exit_opt(struct hist_browser *browser __maybe_unused,
 	return 1;
 }
 
+static int
+do_zoom_socket(struct hist_browser *browser, struct popup_action *act)
+{
+	if (browser->hists->socket_filter > -1) {
+		pstack__remove(browser->pstack, &browser->hists->socket_filter);
+		browser->hists->socket_filter = -1;
+		perf_hpp__set_elide(HISTC_SOCKET, false);
+	} else {
+		browser->hists->socket_filter = act->socket;
+		perf_hpp__set_elide(HISTC_SOCKET, true);
+		pstack__push(browser->pstack, &browser->hists->socket_filter);
+	}
+
+	hists__filter_by_socket(browser->hists);
+	hist_browser__reset(browser);
+	return 0;
+}
+
+static int
+add_socket_opt(struct hist_browser *browser, struct popup_action *act,
+	       char **optstr, int socket_id)
+{
+	if (socket_id < 0)
+		return 0;
+
+	if (asprintf(optstr, "Zoom %s Processor Socket %d",
+		     (browser->hists->socket_filter > -1) ? "out of" : "into",
+		     socket_id) < 0)
+		return 0;
+
+	act->socket = socket_id;
+	act->fn = do_zoom_socket;
+	return 1;
+}
+
 static void hist_browser__update_nr_entries(struct hist_browser *hb)
 {
 	u64 nr_entries = 0;
@@ -1729,6 +1765,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 	"E             Expand all callchains\n"				\
 	"F             Toggle percentage of filtered entries\n"		\
 	"H             Display column headers\n"			\
+	"S             Zoom into current Processor Socket\n"		\
 
 	/* help messages are sorted by lexical order of the hotkey */
 	const char report_help[] = HIST_BROWSER_HELP_COMMON
@@ -1759,7 +1796,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 		hist_browser__update_nr_entries(browser);
 	}
 
-	browser->pstack = pstack__new(2);
+	browser->pstack = pstack__new(3);
 	if (browser->pstack == NULL)
 		goto out;
 
@@ -1778,6 +1815,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 		struct thread *thread = NULL;
 		struct dso *dso = NULL;
 		int choice = 0;
+		int socked_id = -1;
 
 		nr_options = 0;
 
@@ -1786,6 +1824,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 		if (browser->he_selection != NULL) {
 			thread = hist_browser__selected_thread(browser);
 			dso = browser->selection->map ? browser->selection->map->dso : NULL;
+			socked_id = browser->he_selection->socket;
 		}
 		switch (key) {
 		case K_TAB:
@@ -1828,6 +1867,10 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 			actions->thread = thread;
 			do_zoom_thread(browser, actions);
 			continue;
+		case 'S':
+			actions->socket = socked_id;
+			do_zoom_socket(browser, actions);
+			continue;
 		case '/':
 			if (ui_browser__input_window("Symbol to show",
 					"Please enter the name of symbol you want to see",
@@ -1903,9 +1946,11 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 				 * Ditto for thread below.
 				 */
 				do_zoom_dso(browser, actions);
-			}
-			if (top == &browser->hists->thread_filter)
+			} else if (top == &browser->hists->thread_filter) {
 				do_zoom_thread(browser, actions);
+			} else if (top == &browser->hists->socket_filter) {
+				do_zoom_socket(browser, actions);
+			}
 			continue;
 		}
 		case 'q':
@@ -1973,7 +2018,9 @@ skip_annotation:
 		nr_options += add_map_opt(browser, &actions[nr_options],
 					  &options[nr_options],
 					  browser->selection->map);
-
+		nr_options += add_socket_opt(browser, &actions[nr_options],
+					     &options[nr_options],
+					     socked_id);
 		/* perf script support */
 		if (browser->he_selection) {
 			nr_options += add_script_opt(browser,