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Date: Thu, 29 May 2014 12:58:21 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
Jiri Olsa <jolsa@...hat.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Namhyung Kim <namhyung.kim@....com>,
Namhyung Kim <namhyung@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Andi Kleen <andi@...stfloor.org>, Arun Sharma <asharma@...com>,
Rodrigo Campos <rodrigo@...g.com.ar>,
Don Zickus <dzickus@...hat.com>
Subject: [PATCH 18/27] perf tools: Add callback function to hist_entry_iter
The new ->add_entry_cb() will be called after an entry was added to
the histogram. It's used for code sharing between perf report and
perf top. Note that ops->add_*_entry() should set iter->he properly
in order to call the ->add_entry_cb.
Also pass @arg to the callback function. It'll be used by perf top
later.
Tested-by: Arun Sharma <asharma@...com>
Tested-by: Rodrigo Campos <rodrigo@...g.com.ar>
Acked-by: Jiri Olsa <jolsa@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/perf/builtin-report.c | 33 +++++++++++++++++++++++++--------
tools/perf/tests/hists_filter.c | 2 +-
tools/perf/tests/hists_output.c | 2 +-
tools/perf/util/hist.c | 19 +++++++++++++++++--
tools/perf/util/hist.h | 5 ++++-
5 files changed, 48 insertions(+), 13 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 6cac509212ee..ed9f74dc2d27 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -80,14 +80,31 @@ static int report__config(const char *var, const char *value, void *cb)
return perf_default_config(var, value, cb);
}
-static void report__inc_stats(struct report *rep,
- struct hist_entry *he __maybe_unused)
+static void report__inc_stats(struct report *rep, struct hist_entry *he)
{
/*
- * We cannot access @he at this time. Just assume it's a new entry.
- * It'll be fixed once we have a callback mechanism in hist_iter.
+ * The @he is either of a newly created one or an existing one
+ * merging current sample. We only want to count a new one so
+ * checking ->nr_events being 1.
*/
- rep->nr_entries++;
+ if (he->stat.nr_events == 1)
+ rep->nr_entries++;
+}
+
+static int hist_iter__report_callback(struct hist_entry_iter *iter,
+ struct addr_location *al, void *arg)
+{
+ int err = 0;
+ struct hist_entry *he = iter->he;
+ struct perf_evsel *evsel = iter->evsel;
+ struct report *rep = arg;
+
+ if (ui__has_annotation())
+ err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
+
+ report__inc_stats(rep, he);
+
+ return err;
}
static int process_sample_event(struct perf_tool *tool,
@@ -100,6 +117,7 @@ static int process_sample_event(struct perf_tool *tool,
struct addr_location al;
struct hist_entry_iter iter = {
.hide_unresolved = rep->hide_unresolved,
+ .add_entry_cb = hist_iter__report_callback,
};
int ret;
@@ -127,9 +145,8 @@ static int process_sample_event(struct perf_tool *tool,
if (al.map != NULL)
al.map->dso->hit = 1;
- report__inc_stats(rep, NULL);
-
- ret = hist_entry_iter__add(&iter, &al, evsel, sample, rep->max_stack);
+ ret = hist_entry_iter__add(&iter, &al, evsel, sample, rep->max_stack,
+ rep);
if (ret < 0)
pr_debug("problem adding hist entry, skipping event\n");
diff --git a/tools/perf/tests/hists_filter.c b/tools/perf/tests/hists_filter.c
index 76b02e1de701..3539403bbad4 100644
--- a/tools/perf/tests/hists_filter.c
+++ b/tools/perf/tests/hists_filter.c
@@ -82,7 +82,7 @@ static int add_hist_entries(struct perf_evlist *evlist,
goto out;
if (hist_entry_iter__add(&iter, &al, evsel, &sample,
- PERF_MAX_STACK_DEPTH) < 0)
+ PERF_MAX_STACK_DEPTH, NULL) < 0)
goto out;
fake_samples[i].thread = al.thread;
diff --git a/tools/perf/tests/hists_output.c b/tools/perf/tests/hists_output.c
index 1308f88a9169..d40461ecd210 100644
--- a/tools/perf/tests/hists_output.c
+++ b/tools/perf/tests/hists_output.c
@@ -71,7 +71,7 @@ static int add_hist_entries(struct hists *hists, struct machine *machine)
goto out;
if (hist_entry_iter__add(&iter, &al, evsel, &sample,
- PERF_MAX_STACK_DEPTH) < 0)
+ PERF_MAX_STACK_DEPTH, NULL) < 0)
goto out;
fake_samples[i].thread = al.thread;
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index c6f5f5251aad..6ee042d5e8f6 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -802,8 +802,11 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter,
* It's possible that it has cycles or recursive calls.
*/
for (i = 0; i < iter->curr; i++) {
- if (hist_entry__cmp(he_cache[i], &he_tmp) == 0)
+ if (hist_entry__cmp(he_cache[i], &he_tmp) == 0) {
+ /* to avoid calling callback function */
+ iter->he = NULL;
return 0;
+ }
}
he = __hists__add_entry(&evsel->hists, al, iter->parent, NULL, NULL,
@@ -863,7 +866,7 @@ const struct hist_iter_ops hist_iter_cumulative = {
int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,
struct perf_evsel *evsel, struct perf_sample *sample,
- int max_stack_depth)
+ int max_stack_depth, void *arg)
{
int err, err2;
@@ -883,10 +886,22 @@ int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,
if (err)
goto out;
+ if (iter->he && iter->add_entry_cb) {
+ err = iter->add_entry_cb(iter, al, arg);
+ if (err)
+ goto out;
+ }
+
while (iter->ops->next_entry(iter, al)) {
err = iter->ops->add_next_entry(iter, al);
if (err)
break;
+
+ if (iter->he && iter->add_entry_cb) {
+ err = iter->add_entry_cb(iter, al, arg);
+ if (err)
+ goto out;
+ }
}
out:
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 99ad3cb433fb..e0a622651b00 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -119,6 +119,9 @@ struct hist_entry_iter {
void *priv;
const struct hist_iter_ops *ops;
+ /* user-defined callback function (optional) */
+ int (*add_entry_cb)(struct hist_entry_iter *iter,
+ struct addr_location *al, void *arg);
};
extern const struct hist_iter_ops hist_iter_normal;
@@ -135,7 +138,7 @@ struct hist_entry *__hists__add_entry(struct hists *hists,
bool sample_self);
int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,
struct perf_evsel *evsel, struct perf_sample *sample,
- int max_stack_depth);
+ int max_stack_depth, void *arg);
int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right);
int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right);
--
1.9.2
--
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