linux-kernel - [PATCH 13/14] perf diff: Display zero calculation results

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Message-Id: <1354110769-2998-14-git-send-email-jolsa@redhat.com>
Date:	Wed, 28 Nov 2012 14:52:48 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Jiri Olsa <jolsa@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: [PATCH 13/14] perf diff: Display zero calculation results

Forcing zero calculation outputs to appear in final output,
so we can differ between zero output calculation result and
empty space for missing pair of baseline hist_entry.

Also skipping the compute and period output for dummy entries.

Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/builtin-diff.c | 24 +++++++++++++++---------
 tools/perf/util/hist.c    |  1 +
 tools/perf/util/sort.h    |  3 +++
 3 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 50e1ea3..b801d0c 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -779,13 +779,15 @@ static int hpp__color_baseline(struct perf_hpp_fmt *fmt __maybe_unused,
 		container_of(fmt, struct diff_data__fmt, fmt);
 	char pfmt[20] = " ";
 
-	if (percent) {
+	if (!he->dummy) {
 		scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
 		return percent_color_snprintf(hpp->buf, hpp->size,
 					      pfmt, percent);
 	} else
 		return scnprintf(hpp->buf, hpp->size, "%*s",
 				 dfmt->header_width, pfmt);
+
+	return percent_color_snprintf(hpp->buf, hpp->size, pfmt, percent);
 }
 
 static int hpp__entry_baseline(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
@@ -797,7 +799,7 @@ static int hpp__entry_baseline(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
 	const char *fmt = symbol_conf.field_sep ? "%.2f" : " %6.2f%%";
 	char buf[32] = " ";
 
-	if ((percent && he->pairs) || symbol_conf.field_sep)
+	if ((he->pairs) || symbol_conf.field_sep)
 		return scnprintf(hpp->buf, hpp->size, fmt, percent);
 	else
 		return scnprintf(hpp->buf, hpp->size, "%*s",
@@ -828,7 +830,8 @@ hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
 {
 	switch (idx) {
 	case PERF_HPP_DIFF__PERIOD_BASELINE:
-		scnprintf(buf, size, "%" PRIu64, he->stat.period);
+		if (!he->dummy)
+			scnprintf(buf, size, "%" PRIu64, he->stat.period);
 		break;
 
 	default:
@@ -852,28 +855,31 @@ hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
 		else
 			diff = compute_delta(he, pair);
 
-		if (fabs(diff) >= 0.01)
-			scnprintf(buf, size, "%+4.2F%%", diff);
+		scnprintf(buf, size, "%+4.2F%%", diff);
 		break;
 
 	case PERF_HPP_DIFF__RATIO:
+		if (he->dummy)
+			break;
+
 		if (pair->diff.computed)
 			ratio = pair->diff.period_ratio;
 		else
 			ratio = compute_ratio(he, pair);
 
-		if (ratio > 0.0)
-			scnprintf(buf, size, "%14.6F", ratio);
+		scnprintf(buf, size, "%14.6F", ratio);
 		break;
 
 	case PERF_HPP_DIFF__WEIGHTED_DIFF:
+		if (he->dummy)
+			break;
+
 		if (pair->diff.computed)
 			wdiff = pair->diff.wdiff;
 		else
 			wdiff = compute_wdiff(he, pair);
 
-		if (wdiff != 0)
-			scnprintf(buf, size, "%14ld", wdiff);
+		scnprintf(buf, size, "%14ld", wdiff);
 		break;
 
 	case PERF_HPP_DIFF__DISPL:
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 25f94a4..531b5dc 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -745,6 +745,7 @@ static struct hist_entry *hists__add_dummy_entry(struct hists *hists,
 		rb_link_node(&he->rb_node, parent, p);
 		rb_insert_color(&he->rb_node, &hists->entries);
 		hists__inc_nr_entries(hists, he);
+		he->dummy = true;
 	}
 out:
 	return he;
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 377b144..0e06872 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -93,6 +93,9 @@ struct hist_entry {
 	unsigned long		position;
 	struct rb_root		sorted_chain;
 
+	/* Added by hists__add_dummy_entry via hists__link */
+	bool			dummy;
+
 	/* diff related */
 	union {
 		struct hist_entry	**pairs;
-- 
1.7.11.7

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