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[PATCH v2 0/2] perf report: Add titles for percent/ipc/cycle in annotate browser

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  [PATCH v2 0/2] perf report: Add titles for percent/ipc/cycle in annotate browser Jin Yao <yao.jin@linux.intel.com> - 2017-05-05 04:40 +0200
    [PATCH v2 1/2] perf report: Remove the unnecessary checking in annotate_browser_write Jin Yao <yao.jin@linux.intel.com> - 2017-05-05 04:40 +0200

#1636126 — [PATCH v2 0/2] perf report: Add titles for percent/ipc/cycle in annotate browser

v2:
---
Thanks for the comments and ideas from Arnaldo and Milian.

1. Change "Percnt" to "Percent"
2. Add explanations for "Percent", "IPC" and "Cycle".

When user hit hotkey 'h', the help window is popup. Explanations
are added at the bottom of window.

│Report explanation:                                           │
│    Percent: sample percentage for a block                    │
│        IPC: instructions per cycle for a block               │
│      cycle: average number of cycles for a block             │

I don't use a new window to display the report explanation,
instead, I just display the info in current help window so that
user doesn't need to press one more hotkey to get the explanation.  

Changed patch:
--------------
  perf report: Display titles in left frame of annotate browser
 
Unchanged patch:
----------------
  perf report: Remove the unnecessary checking in annotate_browser_write


Initial post
------------

The patch series adds the titles "Percnt", "IPC" and "Cycle" in
annotate browser. It helps user to understand easily for what the
columns in left frame represents for.

For example:

    Percnt  IPC Cycle  │
                       │25  __attribute__((noinline))
                       │26  int compute_flag()
                       │27  {
     22.80  1.20       │      sub    $0x8,%rsp
                       │25          int i;
                       │
                       │27          i = rand() % 2;
     22.78  1.20     1 │    → callq  rand@plt

The patch "perf report: Remove the unnecessary checking in
annotate_browser_write" removes the invalid condition checking in
current code.

Jin Yao (2):
  perf report: Remove the unnecessary checking in annotate_browser_write
  perf report: Display titles in left frame of annotate browser

 tools/perf/ui/browsers/annotate.c | 59 +++++++++++++++++++++++++++------------
 1 file changed, 41 insertions(+), 18 deletions(-)

-- 
2.7.4

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#1636127 — [PATCH v2 1/2] perf report: Remove the unnecessary checking in annotate_browser_write

In annotate_browser_write(),

        if (dl->offset != -1 && percent_max != 0.0) {
                if (percent_max != 0.0) {
			...
                }
                ...
        }

The second checking of (percent_max != 0.0) is not necessary,
so remove it.

Change log:
-----------
v2: not changed.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
 tools/perf/ui/browsers/annotate.c | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index d990ad0..52c1e8d 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -132,21 +132,17 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 	}
 
 	if (dl->offset != -1 && percent_max != 0.0) {
-		if (percent_max != 0.0) {
-			for (i = 0; i < ab->nr_events; i++) {
-				ui_browser__set_percent_color(browser,
-							bdl->samples[i].percent,
-							current_entry);
-				if (annotate_browser__opts.show_total_period) {
-					ui_browser__printf(browser, "%6" PRIu64 " ",
-							   bdl->samples[i].nr);
-				} else {
-					ui_browser__printf(browser, "%6.2f ",
-							   bdl->samples[i].percent);
-				}
+		for (i = 0; i < ab->nr_events; i++) {
+			ui_browser__set_percent_color(browser,
+						bdl->samples[i].percent,
+						current_entry);
+			if (annotate_browser__opts.show_total_period) {
+				ui_browser__printf(browser, "%6" PRIu64 " ",
+						   bdl->samples[i].nr);
+			} else {
+				ui_browser__printf(browser, "%6.2f ",
+						   bdl->samples[i].percent);
 			}
-		} else {
-			ui_browser__write_nstring(browser, " ", 7 * ab->nr_events);
 		}
 	} else {
 		ui_browser__set_percent_color(browser, 0, current_entry);
-- 
2.7.4

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