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>

3 files changed, 117 insertions, 3 deletions

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 33db26c6ca63..34da2a3975b0 100644
--- a/tools/perf/builtin-c2c.c
+++ b/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);
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 4ffff7be9299..31d6d5a7c2dc 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/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)
diff --git a/tools/perf/ui/browsers/hists.h b/tools/perf/ui/browsers/hists.h
index 39bd0f28f211..23d6acb84800 100644
--- a/tools/perf/ui/browsers/hists.h
+++ b/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,