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Subject[PATCH 02/21] perf hists: Add support for accumulated stat of hist entry
Date
Maintain accumulated stat information in hist_entry->stat_acc if
symbol_conf.cumulate_callchain is set. Fields in ->stat_acc have same
vaules initially, and will be updated as callchain is processed later.

Tested-by: Arun Sharma <asharma@fb.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/hist.c | 28 ++++++++++++++++++++++++++--
tools/perf/util/sort.h | 1 +
tools/perf/util/symbol.h | 1 +
3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 83d55f814be1..84ed573e3b6d 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -231,6 +231,8 @@ static bool hists__decay_entry(struct hists *hists, struct hist_entry *he)
return true;

he_stat__decay(&he->stat);
+ if (symbol_conf.cumulate_callchain)
+ he_stat__decay(he->stat_acc);

if (!he->filtered)
hists->stats.total_period -= prev_period - he->stat.period;
@@ -272,12 +274,26 @@ void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel)

static struct hist_entry *hist_entry__new(struct hist_entry *template)
{
- size_t callchain_size = symbol_conf.use_callchain ? sizeof(struct callchain_root) : 0;
- struct hist_entry *he = zalloc(sizeof(*he) + callchain_size);
+ size_t callchain_size = 0;
+ struct hist_entry *he;
+
+ if (symbol_conf.use_callchain || symbol_conf.cumulate_callchain)
+ callchain_size = sizeof(struct callchain_root);
+
+ he = zalloc(sizeof(*he) + callchain_size);

if (he != NULL) {
*he = *template;

+ if (symbol_conf.cumulate_callchain) {
+ he->stat_acc = malloc(sizeof(he->stat));
+ if (he->stat_acc == NULL) {
+ free(he);
+ return NULL;
+ }
+ memcpy(he->stat_acc, &he->stat, sizeof(he->stat));
+ }
+
if (he->ms.map)
he->ms.map->referenced = true;

@@ -289,6 +305,7 @@ static struct hist_entry *hist_entry__new(struct hist_entry *template)
*/
he->branch_info = malloc(sizeof(*he->branch_info));
if (he->branch_info == NULL) {
+ free(he->stat_acc);
free(he);
return NULL;
}
@@ -363,6 +380,8 @@ static struct hist_entry *add_hist_entry(struct hists *hists,

if (!cmp) {
he_stat__add_period(&he->stat, period, weight);
+ if (symbol_conf.cumulate_callchain)
+ he_stat__add_period(he->stat_acc, period, weight);

/*
* This mem info was allocated from sample__resolve_mem
@@ -399,6 +418,8 @@ static struct hist_entry *add_hist_entry(struct hists *hists,
rb_insert_color(&he->rb_node_in, hists->entries_in);
out:
he_stat__add_cpumode_period(&he->stat, al->cpumode, period);
+ if (symbol_conf.cumulate_callchain)
+ he_stat__add_cpumode_period(he->stat_acc, al->cpumode, period);
return he;
}

@@ -784,6 +805,7 @@ void hist_entry__free(struct hist_entry *he)
{
zfree(&he->branch_info);
zfree(&he->mem_info);
+ zfree(&he->stat_acc);
free_srcline(he->srcline);
free(he);
}
@@ -809,6 +831,8 @@ static bool hists__collapse_insert_entry(struct hists *hists __maybe_unused,

if (!cmp) {
he_stat__add_stat(&iter->stat, &he->stat);
+ if (symbol_conf.cumulate_callchain)
+ he_stat__add_stat(iter->stat_acc, he->stat_acc);

if (symbol_conf.use_callchain) {
callchain_cursor_reset(&callchain_cursor);
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index cd679a56c81d..f840a8d1ca70 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -82,6 +82,7 @@ struct hist_entry {
struct list_head head;
} pairs;
struct he_stat stat;
+ struct he_stat *stat_acc;
struct map_symbol ms;
struct thread *thread;
struct comm *comm;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index ae94e006a52d..c8f5544aa542 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -108,6 +108,7 @@ struct symbol_conf {
show_nr_samples,
show_total_period,
use_callchain,
+ cumulate_callchain,
exclude_other,
show_cpu_utilization,
initialized,
--
1.7.11.7


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