[PATCH 4/5] perf report: Fix dynamic entry display in hierarchy

Namhyung Kim
2016-02-26T18:54:41Z

When dynamic sort key is used it might not show pretty printed output.
This is because the trace output was not set only for the first dynamic
sort key. During hierarchy_insert_entry() it missed to pass the
trace_output to dynamic entries. Also even if it did, only first entry
will have it. Subsequent entries might set it during collapsing stage
but it's not guaranteed.

Before:

$ perf report --hierarchy --stdio -s ptr,bytes_req,gfp_flags -g none
#
# Overhead ptr / bytes_req / gfp_flags
# .............. ..........................................
#
37.50% 0xffff8803f7669400
37.50% 448
37.50% 66080
10.42% 0xffff8803f766be00
8.33% 96
8.33% 66080
2.08% 512
2.08% 67280

After:

#
# Overhead ptr / bytes_req / gfp_flags
# .............. ..........................................
#
37.50% 0xffff8803f7669400
37.50% 448
37.50% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
10.42% 0xffff8803f766be00
8.33% 96
8.33% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
2.08% 512
2.08% GFP_KERNEL|GFP_NOWARN|GFP_REPEAT|GFP

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/hist.c | 2 +-
tools/perf/util/sort.c | 3 +++
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index cc849d326211..9b3f582867d6 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1125,7 +1125,7 @@ static struct hist_entry *hierarchy_insert_entry(struct hists *hists,
new->fmt = fmt;

/* some fields are now passed to 'new' */
- if (perf_hpp__is_trace_entry(fmt))
+ if (perf_hpp__is_trace_entry(fmt) || perf_hpp__is_dynamic_entry(fmt))
he->trace_output = NULL;
else
new->trace_output = NULL;
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index e948fcac0939..3b1b4018f111 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1767,6 +1767,9 @@ static int __sort__hde_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
if (hde->raw_trace)
goto raw_field;

+ if (!he->trace_output)
+ he->trace_output = get_trace_output(he);
+
field = hde->field;
namelen = strlen(field->name);
str = he->trace_output;
--
2.7.1