perf c2c report: Add main TUI browser

Add the main cachelines TUI browser. It allows to navigate through
cachelines and display their details and callchains (implemented in the
following patches).
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-pk632k4h1uwc5t0lqc7k61zg@git.kernel.org
Link: http://lkml.kernel.org/r/20161021001706.GB23970@krava
[ Handle file with no entries, fixing segfault reported by Kim Phillips ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-c2c.c

@@ -14,6 +14,7 @@
 #include "data.h"
 #include "sort.h"
 #include <asm/bug.h>
+#include "ui/browsers/hists.h"
 
 struct c2c_hists {
 	struct hists		hists;
@@ -53,6 +54,7 @@ struct perf_c2c {
 	int			 node_info;
 
 	bool			 show_src;
+	bool			 use_stdio;
 };
 
 static struct perf_c2c c2c;
@@ -657,6 +659,10 @@ percent_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 	c2c_he = container_of(he, struct c2c_hist_entry, he);
 	per = get_percent(c2c_he);
 
+#ifdef HAVE_SLANG_SUPPORT
+	if (use_browser)
+		return __hpp__slsmg_color_printf(hpp, "%*.2f%%", width - 1, per);
+#endif
 	return hpp_color_scnprintf(hpp, "%*.2f%%", width - 1, per);
 }
 
@@ -1077,6 +1083,8 @@ static struct c2c_dimension dim_dcacheline = {
 	.width		= 18,
 };
 
+static struct c2c_header header_offset_tui = HEADER_LOW("Off");
+
 static struct c2c_dimension dim_offset = {
 	.header		= HEADER_BOTH("Data address", "Offset"),
 	.name		= "offset",
@@ -1803,6 +1811,100 @@ static void perf_c2c__hists_fprintf(FILE *out)
 	print_pareto(out);
 }
 
+#ifdef HAVE_SLANG_SUPPORT
+static void c2c_browser__update_nr_entries(struct hist_browser *hb)
+{
+	u64 nr_entries = 0;
+	struct rb_node *nd = rb_first(&hb->hists->entries);
+
+	while (nd) {
+		struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
+
+		if (!he->filtered)
+			nr_entries++;
+
+		nd = rb_next(nd);
+	}
+
+	hb->nr_non_filtered_entries = nr_entries;
+}
+
+static int perf_c2c_browser__title(struct hist_browser *browser,
+				   char *bf, size_t size)
+{
+	scnprintf(bf, size,
+		  "Shared Data Cache Line Table "
+		  "(%lu entries)", browser->nr_non_filtered_entries);
+	return 0;
+}
+
+static struct hist_browser*
+perf_c2c_browser__new(struct hists *hists)
+{
+	struct hist_browser *browser = hist_browser__new(hists);
+
+	if (browser) {
+		browser->title = perf_c2c_browser__title;
+		browser->c2c_filter = true;
+	}
+
+	return browser;
+}
+
+static int perf_c2c__hists_browse(struct hists *hists)
+{
+	struct hist_browser *browser;
+	int key = -1;
+
+	browser = perf_c2c_browser__new(hists);
+	if (browser == NULL)
+		return -1;
+
+	/* reset abort key so that it can get Ctrl-C as a key */
+	SLang_reset_tty();
+	SLang_init_tty(0, 0, 0);
+
+	c2c_browser__update_nr_entries(browser);
+
+	while (1) {
+		key = hist_browser__run(browser, "help");
+
+		switch (key) {
+		case 'q':
+			goto out;
+		default:
+			break;
+		}
+	}
+
+out:
+	hist_browser__delete(browser);
+	return 0;
+}
+
+static void perf_c2c_display(void)
+{
+	if (c2c.use_stdio)
+		perf_c2c__hists_fprintf(stdout);
+	else
+		perf_c2c__hists_browse(&c2c.hists.hists);
+}
+#else
+static void perf_c2c_display(void)
+{
+	use_browser = 0;
+	perf_c2c__hists_fprintf(stdout);
+}
+#endif /* HAVE_SLANG_SUPPORT */
+
+static void ui_quirks(void)
+{
+	if (!c2c.use_stdio) {
+		dim_offset.width  = 5;
+		dim_offset.header = header_offset_tui;
+	}
+}
+
 static int perf_c2c__report(int argc, const char **argv)
 {
 	struct perf_session *session;
@@ -1819,6 +1921,9 @@ static int perf_c2c__report(int argc, const char **argv)
 		   "the input file to process"),
 	OPT_INCR('N', "node-info", &c2c.node_info,
 		 "show extra node info in report (repeat for more info)"),
+#ifdef HAVE_SLANG_SUPPORT
+	OPT_BOOLEAN(0, "stdio", &c2c.use_stdio, "Use the stdio interface"),
+#endif
 	OPT_END()
 	};
 	int err = 0;
@@ -1828,6 +1933,13 @@ static int perf_c2c__report(int argc, const char **argv)
 	if (argc)
 		usage_with_options(report_c2c_usage, c2c_options);
 
+	if (c2c.use_stdio)
+		use_browser = 0;
+	else
+		use_browser = 1;
+
+	setup_browser(false);
+
 	if (!input_name || !strlen(input_name))
 		input_name = "perf.data";
 
@@ -1886,8 +1998,9 @@ static int perf_c2c__report(int argc, const char **argv)
 
 	ui_progress__finish();
 
-	use_browser = 0;
-	perf_c2c__hists_fprintf(stdout);
+	ui_quirks();
+
+	perf_c2c_display();
 
 out_session:
 	perf_session__delete(session);

tools/perf/ui/browsers/hists.c

@@ -30,7 +30,7 @@ static struct rb_node *hists__filter_entries(struct rb_node *nd,
 
 static bool hist_browser__has_filter(struct hist_browser *hb)
 {
-	return hists__has_filter(hb->hists) || hb->min_pcnt || symbol_conf.has_filter;
+	return hists__has_filter(hb->hists) || hb->min_pcnt || symbol_conf.has_filter || hb->c2c_filter;
 }
 
 static int hist_browser__get_folding(struct hist_browser *browser)

tools/perf/ui/browsers/hists.h

@@ -18,6 +18,7 @@ struct hist_browser {
 	u64		     nr_non_filtered_entries;
 	u64		     nr_hierarchy_entries;
 	u64		     nr_callchain_rows;
+	bool		     c2c_filter;
 
 	/* Get title string. */
 	int                  (*title)(struct hist_browser *browser,