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perf tools: Add callback function to hist_entry_iter

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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.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arun Sharma <asharma@fb.com>
Tested-by: Rodrigo Campos <rodrigo@sdfg.com.ar>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/87k393g999.fsf@sejong.aot.lge.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
This commit is contained in:
Namhyung Kim 2014-01-07 17:02:25 +09:00 committed by Jiri Olsa
parent 2bf1a12340
commit 9d3c02d718
5 changed files with 84 additions and 53 deletions
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61
tools/perf/builtin-report.c
View file

@ -80,14 +80,59 @@ 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, bool single,
void *arg)
{
int err = 0;
struct report *rep = arg;
struct hist_entry *he = iter->he;
struct perf_evsel *evsel = iter->evsel;
struct mem_info *mi;
struct branch_info *bi;
report__inc_stats(rep, he);
if (!ui__has_annotation())
return 0;
if (sort__mode == SORT_MODE__BRANCH) {
bi = he->branch_info;
err = addr_map_symbol__inc_samples(&bi->from, evsel->idx);
if (err)
goto out;
err = addr_map_symbol__inc_samples(&bi->to, evsel->idx);
} else if (rep->mem_mode) {
mi = he->mem_info;
err = addr_map_symbol__inc_samples(&mi->daddr, evsel->idx);
if (err)
goto out;
err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
} else if (symbol_conf.cumulate_callchain) {
if (single)
err = hist_entry__inc_addr_samples(he, evsel->idx,
al->addr);
} else {
err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
}
out:
return err;
}
static int process_sample_event(struct perf_tool *tool,
@ -100,6 +145,7 @@ 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 +173,8 @@ 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");

2
tools/perf/tests/hists_filter.c
View file

@ -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;

2
tools/perf/tests/hists_output.c
View file

@ -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;

67
tools/perf/util/hist.c
View file

@ -517,27 +517,16 @@ iter_add_single_mem_entry(struct hist_entry_iter *iter, struct addr_location *al
}
static int
iter_finish_mem_entry(struct hist_entry_iter *iter, struct addr_location *al)
iter_finish_mem_entry(struct hist_entry_iter *iter,
struct addr_location *al __maybe_unused)
{
struct perf_evsel *evsel = iter->evsel;
struct hist_entry *he = iter->he;
struct mem_info *mx;
int err = -EINVAL;
if (he == NULL)
goto out;
if (ui__has_annotation()) {
err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
if (err)
goto out;
mx = he->mem_info;
err = addr_map_symbol__inc_samples(&mx->daddr, evsel->idx);
if (err)
goto out;
}
hists__inc_nr_samples(&evsel->hists, he->filtered);
err = hist_entry__append_callchain(he, iter->sample);
@ -575,6 +564,9 @@ static int
iter_add_single_branch_entry(struct hist_entry_iter *iter __maybe_unused,
struct addr_location *al __maybe_unused)
{
/* to avoid calling callback function */
iter->he = NULL;
return 0;
}
@ -599,7 +591,7 @@ iter_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *al)
static int
iter_add_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *al)
{
struct branch_info *bi, *bx;
struct branch_info *bi;
struct perf_evsel *evsel = iter->evsel;
struct hist_entry *he = NULL;
int i = iter->curr;
@ -619,17 +611,6 @@ iter_add_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *a
if (he == NULL)
return -ENOMEM;
if (ui__has_annotation()) {
bx = he->branch_info;
err = addr_map_symbol__inc_samples(&bx->from, evsel->idx);
if (err)
goto out;
err = addr_map_symbol__inc_samples(&bx->to, evsel->idx);
if (err)
goto out;
}
hists__inc_nr_samples(&evsel->hists, he->filtered);
out:
@ -673,9 +654,9 @@ iter_add_single_normal_entry(struct hist_entry_iter *iter, struct addr_location
}
static int
iter_finish_normal_entry(struct hist_entry_iter *iter, struct addr_location *al)
iter_finish_normal_entry(struct hist_entry_iter *iter,
struct addr_location *al __maybe_unused)
{
int err;
struct hist_entry *he = iter->he;
struct perf_evsel *evsel = iter->evsel;
struct perf_sample *sample = iter->sample;
@ -685,12 +666,6 @@ iter_finish_normal_entry(struct hist_entry_iter *iter, struct addr_location *al)
iter->he = NULL;
if (ui__has_annotation()) {
err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
if (err)
return err;
}
hists__inc_nr_samples(&evsel->hists, he->filtered);
return hist_entry__append_callchain(he, sample);
@ -746,13 +721,6 @@ iter_add_single_cumulative_entry(struct hist_entry_iter *iter,
*/
callchain_cursor_commit(&callchain_cursor);
/*
* The iter->he will be over-written after ->add_next_entry()
* called so inc stats for the original entry now.
*/
if (ui__has_annotation())
err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
hists__inc_nr_samples(&evsel->hists, he->filtered);
return err;
@ -802,8 +770,11 @@ 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 +834,7 @@ 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 +854,22 @@ 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, true, 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, false, arg);
if (err)
goto out;
}
}
out:

5
tools/perf/util/hist.h
View file

@ -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, bool single, 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);