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Subject[PATCH 18/40] perf annotate: Rename 'sum' to 'nr_samples' in struct sym_hist
Date
From: Taeung Song <treeze.taeung@gmail.com>

To make it more clear that it is the sum of all the nr_samples fields in the
addr[] entries, i.e.:

sym_hist->nr_samples = sum(sym_hist->addr[0 .. symbol__size(sym)]->nr_samples)

Committer notes:

Taeung had renamed it to total_samples, but using nr_samples, as in the
added explanation above, looks clearer and establishes the direct
connection, making clear it is about the _number_ of samples.

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1500500211-16599-1-git-send-email-treeze.taeung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/ui/gtk/annotate.c | 2 +-
tools/perf/util/annotate.c | 26 +++++++++++++-------------
tools/perf/util/annotate.h | 2 +-
3 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/tools/perf/ui/gtk/annotate.c b/tools/perf/ui/gtk/annotate.c
index d736fd57ab9b..02176193f427 100644
--- a/tools/perf/ui/gtk/annotate.c
+++ b/tools/perf/ui/gtk/annotate.c
@@ -37,7 +37,7 @@ static int perf_gtk__get_percent(char *buf, size_t size, struct symbol *sym,
if (!symbol_conf.event_group && !symhist->addr[dl->offset].nr_samples)
return 0;

- percent = 100.0 * symhist->addr[dl->offset].nr_samples / symhist->sum;
+ percent = 100.0 * symhist->addr[dl->offset].nr_samples / symhist->nr_samples;

markup = perf_gtk__get_percent_color(percent);
if (markup)
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index c3829555ce1c..58c6b63ff049 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -713,7 +713,7 @@ static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,

offset = addr - sym->start;
h = annotation__histogram(notes, evidx);
- h->sum++;
+ h->nr_samples++;
h->addr[offset].nr_samples++;

pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
@@ -957,9 +957,9 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
while (offset < end)
hits += h->addr[offset++].nr_samples;

- if (h->sum) {
+ if (h->nr_samples) {
sample->nr_samples = hits;
- percent = 100.0 * hits / h->sum;
+ percent = 100.0 * hits / h->nr_samples;
}
}

@@ -1672,19 +1672,19 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
struct sym_hist *h = annotation__histogram(notes, evidx);
struct rb_root tmp_root = RB_ROOT;
int nr_pcnt = 1;
- u64 h_sum = h->sum;
+ u64 nr_samples = h->nr_samples;
size_t sizeof_src_line = sizeof(struct source_line);

if (perf_evsel__is_group_event(evsel)) {
for (i = 1; i < evsel->nr_members; i++) {
h = annotation__histogram(notes, evidx + i);
- h_sum += h->sum;
+ nr_samples += h->nr_samples;
}
nr_pcnt = evsel->nr_members;
sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->samples);
}

- if (!h_sum)
+ if (!nr_samples)
return 0;

src_line = notes->src->lines = calloc(len, sizeof_src_line);
@@ -1694,7 +1694,7 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
start = map__rip_2objdump(map, sym->start);

for (i = 0; i < len; i++) {
- u64 offset, nr_samples;
+ u64 offset;
double percent_max = 0.0;

src_line->nr_pcnt = nr_pcnt;
@@ -1704,8 +1704,8 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,

h = annotation__histogram(notes, evidx + k);
nr_samples = h->addr[i].nr_samples;
- if (h->sum)
- percent = 100.0 * nr_samples / h->sum;
+ if (h->nr_samples)
+ percent = 100.0 * nr_samples / h->nr_samples;

if (percent > percent_max)
percent_max = percent;
@@ -1777,7 +1777,7 @@ static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
if (h->addr[offset].nr_samples != 0)
printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
sym->start + offset, h->addr[offset].nr_samples);
- printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
+ printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->nr_samples", h->nr_samples);
}

int symbol__annotate_printf(struct symbol *sym, struct map *map,
@@ -1813,7 +1813,7 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map,
width *= evsel->nr_members;

graph_dotted_len = printf(" %-*.*s| Source code & Disassembly of %s for %s (%" PRIu64 " samples)\n",
- width, width, "Percent", d_filename, evsel_name, h->sum);
+ width, width, "Percent", d_filename, evsel_name, h->nr_samples);

printf("%-*.*s----\n",
graph_dotted_len, graph_dotted_len, graph_dotted_line);
@@ -1877,10 +1877,10 @@ void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
struct sym_hist *h = annotation__histogram(notes, evidx);
int len = symbol__size(sym), offset;

- h->sum = 0;
+ h->nr_samples = 0;
for (offset = 0; offset < len; ++offset) {
h->addr[offset].nr_samples = h->addr[offset].nr_samples * 7 / 8;
- h->sum += h->addr[offset].nr_samples;
+ h->nr_samples += h->addr[offset].nr_samples;
}
}

diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 3a176633b324..e8c246ec53df 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -87,7 +87,7 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
s64 end, const char **path, struct sym_hist_entry *sample);

struct sym_hist {
- u64 sum;
+ u64 nr_samples;
struct sym_hist_entry addr[0];
};

--
2.9.4
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