perf hists: Introduce perf_hpp__list for period related columns

Adding perf_hpp__list list to register and contain all period related
columns the command is interested in.

This way we get rid of static array holding all possible columns and
enable commands to register their own columns.

It'll be handy for diff command in future to process and display data
for multiple files.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/n/tip-kiykge4igrcl7etmpmveto1h@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

8 files changed, 101 insertions, 96 deletions

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 93b852f8a5d..9fbbc01c5ad 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -597,40 +597,35 @@ static const struct option options[] = {
 
 static void ui_init(void)
 {
-	perf_hpp__init();
-
-	/* No overhead column. */
-	perf_hpp__column_enable(PERF_HPP__OVERHEAD, false);
-
 	/*
 	 * Display baseline/delta/ratio/displacement/
 	 * formula/periods columns.
 	 */
-	perf_hpp__column_enable(PERF_HPP__BASELINE, true);
+	perf_hpp__column_enable(PERF_HPP__BASELINE);
 
 	switch (compute) {
 	case COMPUTE_DELTA:
-		perf_hpp__column_enable(PERF_HPP__DELTA, true);
+		perf_hpp__column_enable(PERF_HPP__DELTA);
 		break;
 	case COMPUTE_RATIO:
-		perf_hpp__column_enable(PERF_HPP__RATIO, true);
+		perf_hpp__column_enable(PERF_HPP__RATIO);
 		break;
 	case COMPUTE_WEIGHTED_DIFF:
-		perf_hpp__column_enable(PERF_HPP__WEIGHTED_DIFF, true);
+		perf_hpp__column_enable(PERF_HPP__WEIGHTED_DIFF);
 		break;
 	default:
 		BUG_ON(1);
 	};
 
 	if (show_displacement)
-		perf_hpp__column_enable(PERF_HPP__DISPL, true);
+		perf_hpp__column_enable(PERF_HPP__DISPL);
 
 	if (show_formula)
-		perf_hpp__column_enable(PERF_HPP__FORMULA, true);
+		perf_hpp__column_enable(PERF_HPP__FORMULA);
 
 	if (show_period) {
-		perf_hpp__column_enable(PERF_HPP__PERIOD, true);
-		perf_hpp__column_enable(PERF_HPP__PERIOD_BASELINE, true);
+		perf_hpp__column_enable(PERF_HPP__PERIOD);
+		perf_hpp__column_enable(PERF_HPP__PERIOD_BASELINE);
 	}
 }
 
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index fc251005dd3..5134acf1c39 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -692,6 +692,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 		setup_browser(true);
 	else {
 		use_browser = 0;
+		perf_hpp__column_enable(PERF_HPP__OVERHEAD);
 		perf_hpp__init();
 	}
 
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index ccc4bd16142..57b82c26cd0 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -587,6 +587,8 @@ HPP__COLOR_FN(overhead_guest_us, period_guest_us)
 
 void hist_browser__init_hpp(void)
 {
+	perf_hpp__column_enable(PERF_HPP__OVERHEAD);
+
 	perf_hpp__init();
 
 	perf_hpp__format[PERF_HPP__OVERHEAD].color =
@@ -607,12 +609,13 @@ static int hist_browser__show_entry(struct hist_browser *browser,
 {
 	char s[256];
 	double percent;
-	int i, printed = 0;
+	int printed = 0;
 	int width = browser->b.width;
 	char folded_sign = ' ';
 	bool current_entry = ui_browser__is_current_entry(&browser->b, row);
 	off_t row_offset = entry->row_offset;
 	bool first = true;
+	struct perf_hpp_fmt *fmt;
 
 	if (current_entry) {
 		browser->he_selection = entry;
@@ -629,12 +632,11 @@ static int hist_browser__show_entry(struct hist_browser *browser,
 			.buf		= s,
 			.size		= sizeof(s),
 		};
+		int i = 0;
 
 		ui_browser__gotorc(&browser->b, row, 0);
 
-		for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
-			if (!perf_hpp__format[i].cond)
-				continue;
+		perf_hpp__for_each_format(fmt) {
 
 			if (!first) {
 				slsmg_printf("  ");
@@ -642,14 +644,14 @@ static int hist_browser__show_entry(struct hist_browser *browser,
 			}
 			first = false;
 
-			if (perf_hpp__format[i].color) {
+			if (fmt->color) {
 				hpp.ptr = &percent;
 				/* It will set percent for us. See HPP__COLOR_FN above. */
-				width -= perf_hpp__format[i].color(&hpp, entry);
+				width -= fmt->color(&hpp, entry);
 
 				ui_browser__set_percent_color(&browser->b, percent, current_entry);
 
-				if (i == PERF_HPP__OVERHEAD && symbol_conf.use_callchain) {
+				if (!i && symbol_conf.use_callchain) {
 					slsmg_printf("%c ", folded_sign);
 					width -= 2;
 				}
@@ -659,9 +661,11 @@ static int hist_browser__show_entry(struct hist_browser *browser,
 				if (!current_entry || !browser->b.navkeypressed)
 					ui_browser__set_color(&browser->b, HE_COLORSET_NORMAL);
 			} else {
-				width -= perf_hpp__format[i].entry(&hpp, entry);
+				width -= fmt->entry(&hpp, entry);
 				slsmg_printf("%s", s);
 			}
+
+			i++;
 		}
 
 		/* The scroll bar isn't being used */
diff --git a/tools/perf/ui/gtk/browser.c b/tools/perf/ui/gtk/browser.c
index 253b6219a39..e59ba337f49 100644
--- a/tools/perf/ui/gtk/browser.c
+++ b/tools/perf/ui/gtk/browser.c
@@ -74,6 +74,8 @@ HPP__COLOR_FN(overhead_guest_us, period_guest_us)
 
 void perf_gtk__init_hpp(void)
 {
+	perf_hpp__column_enable(PERF_HPP__OVERHEAD);
+
 	perf_hpp__init();
 
 	perf_hpp__format[PERF_HPP__OVERHEAD].color =
@@ -90,13 +92,14 @@ void perf_gtk__init_hpp(void)
 
 static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
 {
+	struct perf_hpp_fmt *fmt;
 	GType col_types[MAX_COLUMNS];
 	GtkCellRenderer *renderer;
 	struct sort_entry *se;
 	GtkListStore *store;
 	struct rb_node *nd;
 	GtkWidget *view;
-	int i, col_idx;
+	int col_idx;
 	int nr_cols;
 	char s[512];
 
@@ -107,12 +110,8 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
 
 	nr_cols = 0;
 
-	for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
-		if (!perf_hpp__format[i].cond)
-			continue;
-
+	perf_hpp__for_each_format(fmt)
 		col_types[nr_cols++] = G_TYPE_STRING;
-	}
 
 	list_for_each_entry(se, &hist_entry__sort_list, list) {
 		if (se->elide)
@@ -129,12 +128,8 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
 
 	col_idx = 0;
 
-	for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
-		if (!perf_hpp__format[i].cond)
-			continue;
-
-		perf_hpp__format[i].header(&hpp);
-
+	perf_hpp__for_each_format(fmt) {
+		fmt->header(&hpp);
 		gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
 							    -1, s,
 							    renderer, "markup",
@@ -166,14 +161,11 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
 
 		col_idx = 0;
 
-		for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
-			if (!perf_hpp__format[i].cond)
-				continue;
-
-			if (perf_hpp__format[i].color)
-				perf_hpp__format[i].color(&hpp, h);
+		perf_hpp__for_each_format(fmt) {
+			if (fmt->color)
+				fmt->color(&hpp, h);
 			else
-				perf_hpp__format[i].entry(&hpp, h);
+				fmt->entry(&hpp, h);
 
 			gtk_list_store_set(store, &iter, col_idx++, s, -1);
 		}
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index aa84130024d..0a5281fe41d 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -386,60 +386,71 @@ static int hpp__entry_formula(struct perf_hpp *hpp, struct hist_entry *he)
 	return scnprintf(hpp->buf, hpp->size, fmt, buf);
 }
 
-#define HPP__COLOR_PRINT_FNS(_name)		\
-	.header	= hpp__header_ ## _name,		\
-	.width	= hpp__width_ ## _name,		\
-	.color	= hpp__color_ ## _name,		\
-	.entry	= hpp__entry_ ## _name
+#define HPP__COLOR_PRINT_FNS(_name)			\
+	{						\
+		.header	= hpp__header_ ## _name,	\
+		.width	= hpp__width_ ## _name,		\
+		.color	= hpp__color_ ## _name,		\
+		.entry	= hpp__entry_ ## _name		\
+	}
 
-#define HPP__PRINT_FNS(_name)			\
-	.header	= hpp__header_ ## _name,		\
-	.width	= hpp__width_ ## _name,		\
-	.entry	= hpp__entry_ ## _name
+#define HPP__PRINT_FNS(_name)				\
+	{						\
+		.header	= hpp__header_ ## _name,	\
+		.width	= hpp__width_ ## _name,		\
+		.entry	= hpp__entry_ ## _name		\
+	}
 
 struct perf_hpp_fmt perf_hpp__format[] = {
-	{ .cond = false, HPP__COLOR_PRINT_FNS(baseline) },
-	{ .cond = true,  HPP__COLOR_PRINT_FNS(overhead) },
-	{ .cond = false, HPP__COLOR_PRINT_FNS(overhead_sys) },
-	{ .cond = false, HPP__COLOR_PRINT_FNS(overhead_us) },
-	{ .cond = false, HPP__COLOR_PRINT_FNS(overhead_guest_sys) },
-	{ .cond = false, HPP__COLOR_PRINT_FNS(overhead_guest_us) },
-	{ .cond = false, HPP__PRINT_FNS(samples) },
-	{ .cond = false, HPP__PRINT_FNS(period) },
-	{ .cond = false, HPP__PRINT_FNS(period_baseline) },
-	{ .cond = false, HPP__PRINT_FNS(delta) },
-	{ .cond = false, HPP__PRINT_FNS(ratio) },
-	{ .cond = false, HPP__PRINT_FNS(wdiff) },
-	{ .cond = false, HPP__PRINT_FNS(displ) },
-	{ .cond = false, HPP__PRINT_FNS(formula) }
+	HPP__COLOR_PRINT_FNS(baseline),
+	HPP__COLOR_PRINT_FNS(overhead),
+	HPP__COLOR_PRINT_FNS(overhead_sys),
+	HPP__COLOR_PRINT_FNS(overhead_us),
+	HPP__COLOR_PRINT_FNS(overhead_guest_sys),
+	HPP__COLOR_PRINT_FNS(overhead_guest_us),
+	HPP__PRINT_FNS(samples),
+	HPP__PRINT_FNS(period),
+	HPP__PRINT_FNS(period_baseline),
+	HPP__PRINT_FNS(delta),
+	HPP__PRINT_FNS(ratio),
+	HPP__PRINT_FNS(wdiff),
+	HPP__PRINT_FNS(displ),
+	HPP__PRINT_FNS(formula)
 };
 
+LIST_HEAD(perf_hpp__list);
+
 #undef HPP__COLOR_PRINT_FNS
 #undef HPP__PRINT_FNS
 
 void perf_hpp__init(void)
 {
 	if (symbol_conf.show_cpu_utilization) {
-		perf_hpp__format[PERF_HPP__OVERHEAD_SYS].cond = true;
-		perf_hpp__format[PERF_HPP__OVERHEAD_US].cond = true;
+		perf_hpp__column_enable(PERF_HPP__OVERHEAD_SYS);
+		perf_hpp__column_enable(PERF_HPP__OVERHEAD_US);
 
 		if (perf_guest) {
-			perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_SYS].cond = true;
-			perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_US].cond = true;
+			perf_hpp__column_enable(PERF_HPP__OVERHEAD_GUEST_SYS);
+			perf_hpp__column_enable(PERF_HPP__OVERHEAD_GUEST_US);
 		}
 	}
 
 	if (symbol_conf.show_nr_samples)
-		perf_hpp__format[PERF_HPP__SAMPLES].cond = true;
+		perf_hpp__column_enable(PERF_HPP__SAMPLES);
 
 	if (symbol_conf.show_total_period)
-		perf_hpp__format[PERF_HPP__PERIOD].cond = true;
+		perf_hpp__column_enable(PERF_HPP__PERIOD);
 }
 
-void perf_hpp__column_enable(unsigned col, bool enable)
+void perf_hpp__column_register(struct perf_hpp_fmt *format)
+{
+	list_add_tail(&format->list, &perf_hpp__list);
+}
+
+void perf_hpp__column_enable(unsigned col)
 {
 	BUG_ON(col >= PERF_HPP__MAX_INDEX);
-	perf_hpp__format[col].cond = enable;
+	perf_hpp__column_register(&perf_hpp__format[col]);
 }
 
 static inline void advance_hpp(struct perf_hpp *hpp, int inc)
@@ -452,27 +463,25 @@ int hist_entry__period_snprintf(struct perf_hpp *hpp, struct hist_entry *he,
 				bool color)
 {
 	const char *sep = symbol_conf.field_sep;
+	struct perf_hpp_fmt *fmt;
 	char *start = hpp->buf;
-	int i, ret;
+	int ret;
 	bool first = true;
 
 	if (symbol_conf.exclude_other && !he->parent)
 		return 0;
 
-	for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
-		if (!perf_hpp__format[i].cond)
-			continue;
-
+	perf_hpp__for_each_format(fmt) {
 		if (!sep || !first) {
 			ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
 			advance_hpp(hpp, ret);
 			first = false;
 		}
 
-		if (color && perf_hpp__format[i].color)
-			ret = perf_hpp__format[i].color(hpp, he);
+		if (color && fmt->color)
+			ret = fmt->color(hpp, he);
 		else
-			ret = perf_hpp__format[i].entry(hpp, he);
+			ret = fmt->entry(hpp, he);
 
 		advance_hpp(hpp, ret);
 	}
@@ -504,16 +513,15 @@ int hist_entry__sort_snprintf(struct hist_entry *he, char *s, size_t size,
  */
 unsigned int hists__sort_list_width(struct hists *hists)
 {
+	struct perf_hpp_fmt *fmt;
 	struct sort_entry *se;
-	int i, ret = 0;
+	int i = 0, ret = 0;
 
-	for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
-		if (!perf_hpp__format[i].cond)
-			continue;
+	perf_hpp__for_each_format(fmt) {
 		if (i)
 			ret += 2;
 
-		ret += perf_hpp__format[i].width(NULL);
+		ret += fmt->width(NULL);
 	}
 
 	list_for_each_entry(se, &hist_entry__sort_list, list)
diff --git a/tools/perf/ui/setup.c b/tools/perf/ui/setup.c
index ebb4cc10787..166f13df313 100644
--- a/tools/perf/ui/setup.c
+++ b/tools/perf/ui/setup.c
@@ -30,6 +30,7 @@ void setup_browser(bool fallback_to_pager)
 		if (fallback_to_pager)
 			setup_pager();
 
+		perf_hpp__column_enable(PERF_HPP__OVERHEAD);
 		perf_hpp__init();
 		break;
 	}
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index f0ee204f99b..0eae3b2c32f 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -335,13 +335,14 @@ static int hist_entry__fprintf(struct hist_entry *he, size_t size,
 size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 		      int max_cols, FILE *fp)
 {
+	struct perf_hpp_fmt *fmt;
 	struct sort_entry *se;
 	struct rb_node *nd;
 	size_t ret = 0;
 	unsigned int width;
 	const char *sep = symbol_conf.field_sep;
 	const char *col_width = symbol_conf.col_width_list_str;
-	int idx, nr_rows = 0;
+	int nr_rows = 0;
 	char bf[96];
 	struct perf_hpp dummy_hpp = {
 		.buf	= bf,
@@ -355,16 +356,14 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 		goto print_entries;
 
 	fprintf(fp, "# ");
-	for (idx = 0; idx < PERF_HPP__MAX_INDEX; idx++) {
-		if (!perf_hpp__format[idx].cond)
-			continue;
 
+	perf_hpp__for_each_format(fmt) {
 		if (!first)
 			fprintf(fp, "%s", sep ?: "  ");
 		else
 			first = false;
 
-		perf_hpp__format[idx].header(&dummy_hpp);
+		fmt->header(&dummy_hpp);
 		fprintf(fp, "%s", bf);
 	}
 
@@ -400,18 +399,16 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 	first = true;
 
 	fprintf(fp, "# ");
-	for (idx = 0; idx < PERF_HPP__MAX_INDEX; idx++) {
-		unsigned int i;
 
-		if (!perf_hpp__format[idx].cond)
-			continue;
+	perf_hpp__for_each_format(fmt) {
+		unsigned int i;
 
 		if (!first)
 			fprintf(fp, "%s", sep ?: "  ");
 		else
 			first = false;
 
-		width = perf_hpp__format[idx].width(&dummy_hpp);
+		width = fmt->width(&dummy_hpp);
 		for (i = 0; i < width; i++)
 			fprintf(fp, ".");
 	}
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 8b091a51e4a..a935a60d521 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -126,13 +126,19 @@ struct perf_hpp {
 };
 
 struct perf_hpp_fmt {
-	bool cond;
 	int (*header)(struct perf_hpp *hpp);
 	int (*width)(struct perf_hpp *hpp);
 	int (*color)(struct perf_hpp *hpp, struct hist_entry *he);
 	int (*entry)(struct perf_hpp *hpp, struct hist_entry *he);
+
+	struct list_head list;
 };
 
+extern struct list_head perf_hpp__list;
+
+#define perf_hpp__for_each_format(format) \
+	list_for_each_entry(format, &perf_hpp__list, list)
+
 extern struct perf_hpp_fmt perf_hpp__format[];
 
 enum {
@@ -155,7 +161,8 @@ enum {
 };
 
 void perf_hpp__init(void);
-void perf_hpp__column_enable(unsigned col, bool enable);
+void perf_hpp__column_register(struct perf_hpp_fmt *format);
+void perf_hpp__column_enable(unsigned col);
 int hist_entry__period_snprintf(struct perf_hpp *hpp, struct hist_entry *he,
 				bool color);