perf annotate browser: More clearly separate columns

The first column (columns in the near future) are for the per line event
overhead(s), that only appear when they are not zero.

To clearly separate it, add back a solid vertical line, with just one
colour, not influenced by the per line overheads.

Then have the addr/offset column, then optionally the dynamic
(static in the future) jump->target arrows, if 'j' enables it.

Then the instructions.

Requested-by: Peter Zijlstra <peterz@infradead.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
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-r415t4sps0oyr9y8kd9j7clz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/browser.c

@@ -611,7 +611,7 @@ void ui_browser__write_graph(struct ui_browser *browser __used, int graph)
 
 static void __ui_browser__line_arrow_up(struct ui_browser *browser,
 					unsigned int column,
-					u64 start, u64 end, int start_width)
+					u64 start, u64 end)
 {
 	unsigned int row, end_row;
 
@@ -622,7 +622,7 @@ static void __ui_browser__line_arrow_up(struct ui_browser *browser,
 		ui_browser__gotorc(browser, row, column);
 		SLsmg_write_char(SLSMG_LLCORN_CHAR);
 		ui_browser__gotorc(browser, row, column + 1);
-		SLsmg_draw_hline(start_width);
+		SLsmg_draw_hline(2);
 
 		if (row-- == 0)
 			goto out;
@@ -651,7 +651,7 @@ out:
 
 static void __ui_browser__line_arrow_down(struct ui_browser *browser,
 					  unsigned int column,
-					  u64 start, u64 end, int start_width)
+					  u64 start, u64 end)
 {
 	unsigned int row, end_row;
 
@@ -662,7 +662,7 @@ static void __ui_browser__line_arrow_down(struct ui_browser *browser,
 		ui_browser__gotorc(browser, row, column);
 		SLsmg_write_char(SLSMG_ULCORN_CHAR);
 		ui_browser__gotorc(browser, row, column + 1);
-		SLsmg_draw_hline(start_width);
+		SLsmg_draw_hline(2);
 
 		if (row++ == 0)
 			goto out;
@@ -690,12 +690,12 @@ out:
 }
 
 void __ui_browser__line_arrow(struct ui_browser *browser, unsigned int column,
-			      u64 start, u64 end, int start_width)
+			      u64 start, u64 end)
 {
 	if (start > end)
-		__ui_browser__line_arrow_up(browser, column, start, end, start_width);
+		__ui_browser__line_arrow_up(browser, column, start, end);
 	else
-		__ui_browser__line_arrow_down(browser, column, start, end, start_width);
+		__ui_browser__line_arrow_down(browser, column, start, end);
 }
 
 void ui_browser__init(void)

tools/perf/ui/browser.h

@@ -39,7 +39,7 @@ void ui_browser__reset_index(struct ui_browser *self);
 void ui_browser__gotorc(struct ui_browser *self, int y, int x);
 void ui_browser__write_graph(struct ui_browser *browser, int graph);
 void __ui_browser__line_arrow(struct ui_browser *browser, unsigned int column,
-			      u64 start, u64 end, int start_width);
+			      u64 start, u64 end);
 void __ui_browser__show_title(struct ui_browser *browser, const char *title);
 void ui_browser__show_title(struct ui_browser *browser, const char *title);
 int ui_browser__show(struct ui_browser *self, const char *title,

tools/perf/ui/browsers/annotate.c

@@ -32,7 +32,9 @@ struct annotate_browser {
 	bool		    use_offset;
 	bool		    jump_arrows;
 	bool		    searching_backwards;
-	u8		    offset_width;
+	u8		    addr_width;
+	u8		    min_addr_width;
+	u8		    max_addr_width;
 	char		    search_bf[128];
 };
 
@@ -62,7 +64,8 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
 	bool change_color = (!ab->hide_src_code &&
 			     (!current_entry || (self->use_navkeypressed &&
 					         !self->navkeypressed)));
-	int width = self->width;
+	int width = self->width, printed;
+	char bf[256];
 
 	if (dl->offset != -1 && bdl->percent != 0.0) {
 		ui_browser__set_percent_color(self, bdl->percent, current_entry);
@@ -83,25 +86,27 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
 
 	if (!*dl->line)
 		slsmg_write_nstring(" ", width - 7);
-	else if (dl->offset == -1)
-		slsmg_write_nstring(dl->line, width - 7);
-	else {
-		char bf[256];
+	else if (dl->offset == -1) {
+		printed = scnprintf(bf, sizeof(bf), "%*s  ",
+				    ab->addr_width, " ");
+		slsmg_write_nstring(bf, printed);
+		slsmg_write_nstring(dl->line, width - printed - 6);
+	} else {
 		u64 addr = dl->offset;
-		int printed, color = -1;
+		int color = -1;
 
 		if (!ab->use_offset)
 			addr += ab->start;
 
 		if (!ab->use_offset) {
-			printed = scnprintf(bf, sizeof(bf), "  %" PRIx64 ":", addr);
+			printed = scnprintf(bf, sizeof(bf), "%" PRIx64 ": ", addr);
 		} else {
 			if (bdl->jump_target) {
-				printed = scnprintf(bf, sizeof(bf), "  %*" PRIx64 ":",
-						    ab->offset_width, addr);
+				printed = scnprintf(bf, sizeof(bf), "%*" PRIx64 ": ",
+						    ab->addr_width, addr);
 			} else {
-				printed = scnprintf(bf, sizeof(bf), "  %*s ",
-						    ab->offset_width, " ");
+				printed = scnprintf(bf, sizeof(bf), "%*s  ",
+						    ab->addr_width, " ");
 			}
 		}
 
@@ -137,7 +142,7 @@ static void annotate_browser__write(struct ui_browser *self, void *entry, int ro
 			scnprintf(bf, sizeof(bf), "%-6.6s %s", dl->name, dl->ops.raw);
 		}
 
-		slsmg_write_nstring(bf, width - 9 - printed);
+		slsmg_write_nstring(bf, width - 10 - printed);
 	}
 
 	if (current_entry)
@@ -149,7 +154,7 @@ static void annotate_browser__draw_current_jump(struct ui_browser *browser)
 	struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
 	struct disasm_line *cursor = ab->selection, *target;
 	struct browser_disasm_line *btarget, *bcursor;
-	unsigned int from, to, start_width = 2;
+	unsigned int from, to;
 
 	if (!cursor->ins || !ins__is_jump(cursor->ins) ||
 	    !disasm_line__has_offset(cursor))
@@ -171,11 +176,7 @@ static void annotate_browser__draw_current_jump(struct ui_browser *browser)
 	}
 
 	ui_browser__set_color(browser, HE_COLORSET_CODE);
-
-	if (!bcursor->jump_target)
-		start_width += ab->offset_width + 1;
-
-	__ui_browser__line_arrow(browser, 7, from, to, start_width);
+	__ui_browser__line_arrow(browser, 9 + ab->addr_width, from, to);
 }
 
 static unsigned int annotate_browser__refresh(struct ui_browser *browser)
@@ -186,6 +187,8 @@ static unsigned int annotate_browser__refresh(struct ui_browser *browser)
 	if (ab->jump_arrows)
 		annotate_browser__draw_current_jump(browser);
 
+	ui_browser__set_color(browser, HE_COLORSET_NORMAL);
+	__ui_browser__vline(browser, 7, 0, browser->height - 1);
 	return ret;
 }
 
@@ -618,6 +621,10 @@ static int annotate_browser__run(struct annotate_browser *self, int evidx,
 		case 'O':
 		case 'o':
 			self->use_offset = !self->use_offset;
+			if (self->use_offset)
+				self->addr_width = self->min_addr_width;
+			else
+				self->addr_width = self->max_addr_width;
 			continue;
 		case 'j':
 			self->jump_arrows = !self->jump_arrows;
@@ -784,7 +791,8 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 
 	annotate_browser__mark_jump_targets(&browser, size);
 
-	browser.offset_width = hex_width(size);
+	browser.addr_width = browser.min_addr_width = hex_width(size);
+	browser.max_addr_width = hex_width(sym->end);
 	browser.b.nr_entries = browser.nr_entries;
 	browser.b.entries = &notes->src->source,
 	browser.b.width += 18; /* Percentage */