linux/tools/perf/ui/hist.c
Jiri Olsa 98ba160929 perf tools: Make several display functions global
Will be used from external places in the upcoming c2c patch series.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1474558645-19956-8-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-09-22 13:08:58 -03:00

802 lines
19 KiB
C

#include <math.h>
#include <linux/compiler.h>
#include "../util/hist.h"
#include "../util/util.h"
#include "../util/sort.h"
#include "../util/evsel.h"
#include "../util/evlist.h"
/* hist period print (hpp) functions */
#define hpp__call_print_fn(hpp, fn, fmt, ...) \
({ \
int __ret = fn(hpp, fmt, ##__VA_ARGS__); \
advance_hpp(hpp, __ret); \
__ret; \
})
static int __hpp__fmt(struct perf_hpp *hpp, struct hist_entry *he,
hpp_field_fn get_field, const char *fmt, int len,
hpp_snprint_fn print_fn, bool fmt_percent)
{
int ret;
struct hists *hists = he->hists;
struct perf_evsel *evsel = hists_to_evsel(hists);
char *buf = hpp->buf;
size_t size = hpp->size;
if (fmt_percent) {
double percent = 0.0;
u64 total = hists__total_period(hists);
if (total)
percent = 100.0 * get_field(he) / total;
ret = hpp__call_print_fn(hpp, print_fn, fmt, len, percent);
} else
ret = hpp__call_print_fn(hpp, print_fn, fmt, len, get_field(he));
if (perf_evsel__is_group_event(evsel)) {
int prev_idx, idx_delta;
struct hist_entry *pair;
int nr_members = evsel->nr_members;
prev_idx = perf_evsel__group_idx(evsel);
list_for_each_entry(pair, &he->pairs.head, pairs.node) {
u64 period = get_field(pair);
u64 total = hists__total_period(pair->hists);
if (!total)
continue;
evsel = hists_to_evsel(pair->hists);
idx_delta = perf_evsel__group_idx(evsel) - prev_idx - 1;
while (idx_delta--) {
/*
* zero-fill group members in the middle which
* have no sample
*/
if (fmt_percent) {
ret += hpp__call_print_fn(hpp, print_fn,
fmt, len, 0.0);
} else {
ret += hpp__call_print_fn(hpp, print_fn,
fmt, len, 0ULL);
}
}
if (fmt_percent) {
ret += hpp__call_print_fn(hpp, print_fn, fmt, len,
100.0 * period / total);
} else {
ret += hpp__call_print_fn(hpp, print_fn, fmt,
len, period);
}
prev_idx = perf_evsel__group_idx(evsel);
}
idx_delta = nr_members - prev_idx - 1;
while (idx_delta--) {
/*
* zero-fill group members at last which have no sample
*/
if (fmt_percent) {
ret += hpp__call_print_fn(hpp, print_fn,
fmt, len, 0.0);
} else {
ret += hpp__call_print_fn(hpp, print_fn,
fmt, len, 0ULL);
}
}
}
/*
* Restore original buf and size as it's where caller expects
* the result will be saved.
*/
hpp->buf = buf;
hpp->size = size;
return ret;
}
int hpp__fmt(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct hist_entry *he, hpp_field_fn get_field,
const char *fmtstr, hpp_snprint_fn print_fn, bool fmt_percent)
{
int len = fmt->user_len ?: fmt->len;
if (symbol_conf.field_sep) {
return __hpp__fmt(hpp, he, get_field, fmtstr, 1,
print_fn, fmt_percent);
}
if (fmt_percent)
len -= 2; /* 2 for a space and a % sign */
else
len -= 1;
return __hpp__fmt(hpp, he, get_field, fmtstr, len, print_fn, fmt_percent);
}
int hpp__fmt_acc(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct hist_entry *he, hpp_field_fn get_field,
const char *fmtstr, hpp_snprint_fn print_fn, bool fmt_percent)
{
if (!symbol_conf.cumulate_callchain) {
int len = fmt->user_len ?: fmt->len;
return snprintf(hpp->buf, hpp->size, " %*s", len - 1, "N/A");
}
return hpp__fmt(fmt, hpp, he, get_field, fmtstr, print_fn, fmt_percent);
}
static int field_cmp(u64 field_a, u64 field_b)
{
if (field_a > field_b)
return 1;
if (field_a < field_b)
return -1;
return 0;
}
static int __hpp__sort(struct hist_entry *a, struct hist_entry *b,
hpp_field_fn get_field)
{
s64 ret;
int i, nr_members;
struct perf_evsel *evsel;
struct hist_entry *pair;
u64 *fields_a, *fields_b;
ret = field_cmp(get_field(a), get_field(b));
if (ret || !symbol_conf.event_group)
return ret;
evsel = hists_to_evsel(a->hists);
if (!perf_evsel__is_group_event(evsel))
return ret;
nr_members = evsel->nr_members;
fields_a = calloc(nr_members, sizeof(*fields_a));
fields_b = calloc(nr_members, sizeof(*fields_b));
if (!fields_a || !fields_b)
goto out;
list_for_each_entry(pair, &a->pairs.head, pairs.node) {
evsel = hists_to_evsel(pair->hists);
fields_a[perf_evsel__group_idx(evsel)] = get_field(pair);
}
list_for_each_entry(pair, &b->pairs.head, pairs.node) {
evsel = hists_to_evsel(pair->hists);
fields_b[perf_evsel__group_idx(evsel)] = get_field(pair);
}
for (i = 1; i < nr_members; i++) {
ret = field_cmp(fields_a[i], fields_b[i]);
if (ret)
break;
}
out:
free(fields_a);
free(fields_b);
return ret;
}
static int __hpp__sort_acc(struct hist_entry *a, struct hist_entry *b,
hpp_field_fn get_field)
{
s64 ret = 0;
if (symbol_conf.cumulate_callchain) {
/*
* Put caller above callee when they have equal period.
*/
ret = field_cmp(get_field(a), get_field(b));
if (ret)
return ret;
if (a->thread != b->thread || !symbol_conf.use_callchain)
return 0;
ret = b->callchain->max_depth - a->callchain->max_depth;
}
return ret;
}
static int hpp__width_fn(struct perf_hpp_fmt *fmt,
struct perf_hpp *hpp __maybe_unused,
struct hists *hists)
{
int len = fmt->user_len ?: fmt->len;
struct perf_evsel *evsel = hists_to_evsel(hists);
if (symbol_conf.event_group)
len = max(len, evsel->nr_members * fmt->len);
if (len < (int)strlen(fmt->name))
len = strlen(fmt->name);
return len;
}
static int hpp__header_fn(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct hists *hists, int line __maybe_unused,
int *span __maybe_unused)
{
int len = hpp__width_fn(fmt, hpp, hists);
return scnprintf(hpp->buf, hpp->size, "%*s", len, fmt->name);
}
int hpp_color_scnprintf(struct perf_hpp *hpp, const char *fmt, ...)
{
va_list args;
ssize_t ssize = hpp->size;
double percent;
int ret, len;
va_start(args, fmt);
len = va_arg(args, int);
percent = va_arg(args, double);
ret = percent_color_len_snprintf(hpp->buf, hpp->size, fmt, len, percent);
va_end(args);
return (ret >= ssize) ? (ssize - 1) : ret;
}
static int hpp_entry_scnprintf(struct perf_hpp *hpp, const char *fmt, ...)
{
va_list args;
ssize_t ssize = hpp->size;
int ret;
va_start(args, fmt);
ret = vsnprintf(hpp->buf, hpp->size, fmt, args);
va_end(args);
return (ret >= ssize) ? (ssize - 1) : ret;
}
#define __HPP_COLOR_PERCENT_FN(_type, _field) \
static u64 he_get_##_field(struct hist_entry *he) \
{ \
return he->stat._field; \
} \
\
static int hpp__color_##_type(struct perf_hpp_fmt *fmt, \
struct perf_hpp *hpp, struct hist_entry *he) \
{ \
return hpp__fmt(fmt, hpp, he, he_get_##_field, " %*.2f%%", \
hpp_color_scnprintf, true); \
}
#define __HPP_ENTRY_PERCENT_FN(_type, _field) \
static int hpp__entry_##_type(struct perf_hpp_fmt *fmt, \
struct perf_hpp *hpp, struct hist_entry *he) \
{ \
return hpp__fmt(fmt, hpp, he, he_get_##_field, " %*.2f%%", \
hpp_entry_scnprintf, true); \
}
#define __HPP_SORT_FN(_type, _field) \
static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, \
struct hist_entry *a, struct hist_entry *b) \
{ \
return __hpp__sort(a, b, he_get_##_field); \
}
#define __HPP_COLOR_ACC_PERCENT_FN(_type, _field) \
static u64 he_get_acc_##_field(struct hist_entry *he) \
{ \
return he->stat_acc->_field; \
} \
\
static int hpp__color_##_type(struct perf_hpp_fmt *fmt, \
struct perf_hpp *hpp, struct hist_entry *he) \
{ \
return hpp__fmt_acc(fmt, hpp, he, he_get_acc_##_field, " %*.2f%%", \
hpp_color_scnprintf, true); \
}
#define __HPP_ENTRY_ACC_PERCENT_FN(_type, _field) \
static int hpp__entry_##_type(struct perf_hpp_fmt *fmt, \
struct perf_hpp *hpp, struct hist_entry *he) \
{ \
return hpp__fmt_acc(fmt, hpp, he, he_get_acc_##_field, " %*.2f%%", \
hpp_entry_scnprintf, true); \
}
#define __HPP_SORT_ACC_FN(_type, _field) \
static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, \
struct hist_entry *a, struct hist_entry *b) \
{ \
return __hpp__sort_acc(a, b, he_get_acc_##_field); \
}
#define __HPP_ENTRY_RAW_FN(_type, _field) \
static u64 he_get_raw_##_field(struct hist_entry *he) \
{ \
return he->stat._field; \
} \
\
static int hpp__entry_##_type(struct perf_hpp_fmt *fmt, \
struct perf_hpp *hpp, struct hist_entry *he) \
{ \
return hpp__fmt(fmt, hpp, he, he_get_raw_##_field, " %*"PRIu64, \
hpp_entry_scnprintf, false); \
}
#define __HPP_SORT_RAW_FN(_type, _field) \
static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, \
struct hist_entry *a, struct hist_entry *b) \
{ \
return __hpp__sort(a, b, he_get_raw_##_field); \
}
#define HPP_PERCENT_FNS(_type, _field) \
__HPP_COLOR_PERCENT_FN(_type, _field) \
__HPP_ENTRY_PERCENT_FN(_type, _field) \
__HPP_SORT_FN(_type, _field)
#define HPP_PERCENT_ACC_FNS(_type, _field) \
__HPP_COLOR_ACC_PERCENT_FN(_type, _field) \
__HPP_ENTRY_ACC_PERCENT_FN(_type, _field) \
__HPP_SORT_ACC_FN(_type, _field)
#define HPP_RAW_FNS(_type, _field) \
__HPP_ENTRY_RAW_FN(_type, _field) \
__HPP_SORT_RAW_FN(_type, _field)
HPP_PERCENT_FNS(overhead, period)
HPP_PERCENT_FNS(overhead_sys, period_sys)
HPP_PERCENT_FNS(overhead_us, period_us)
HPP_PERCENT_FNS(overhead_guest_sys, period_guest_sys)
HPP_PERCENT_FNS(overhead_guest_us, period_guest_us)
HPP_PERCENT_ACC_FNS(overhead_acc, period)
HPP_RAW_FNS(samples, nr_events)
HPP_RAW_FNS(period, period)
static int64_t hpp__nop_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
struct hist_entry *a __maybe_unused,
struct hist_entry *b __maybe_unused)
{
return 0;
}
static bool perf_hpp__is_hpp_entry(struct perf_hpp_fmt *a)
{
return a->header == hpp__header_fn;
}
static bool hpp__equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
{
if (!perf_hpp__is_hpp_entry(a) || !perf_hpp__is_hpp_entry(b))
return false;
return a->idx == b->idx;
}
#define HPP__COLOR_PRINT_FNS(_name, _fn, _idx) \
{ \
.name = _name, \
.header = hpp__header_fn, \
.width = hpp__width_fn, \
.color = hpp__color_ ## _fn, \
.entry = hpp__entry_ ## _fn, \
.cmp = hpp__nop_cmp, \
.collapse = hpp__nop_cmp, \
.sort = hpp__sort_ ## _fn, \
.idx = PERF_HPP__ ## _idx, \
.equal = hpp__equal, \
}
#define HPP__COLOR_ACC_PRINT_FNS(_name, _fn, _idx) \
{ \
.name = _name, \
.header = hpp__header_fn, \
.width = hpp__width_fn, \
.color = hpp__color_ ## _fn, \
.entry = hpp__entry_ ## _fn, \
.cmp = hpp__nop_cmp, \
.collapse = hpp__nop_cmp, \
.sort = hpp__sort_ ## _fn, \
.idx = PERF_HPP__ ## _idx, \
.equal = hpp__equal, \
}
#define HPP__PRINT_FNS(_name, _fn, _idx) \
{ \
.name = _name, \
.header = hpp__header_fn, \
.width = hpp__width_fn, \
.entry = hpp__entry_ ## _fn, \
.cmp = hpp__nop_cmp, \
.collapse = hpp__nop_cmp, \
.sort = hpp__sort_ ## _fn, \
.idx = PERF_HPP__ ## _idx, \
.equal = hpp__equal, \
}
struct perf_hpp_fmt perf_hpp__format[] = {
HPP__COLOR_PRINT_FNS("Overhead", overhead, OVERHEAD),
HPP__COLOR_PRINT_FNS("sys", overhead_sys, OVERHEAD_SYS),
HPP__COLOR_PRINT_FNS("usr", overhead_us, OVERHEAD_US),
HPP__COLOR_PRINT_FNS("guest sys", overhead_guest_sys, OVERHEAD_GUEST_SYS),
HPP__COLOR_PRINT_FNS("guest usr", overhead_guest_us, OVERHEAD_GUEST_US),
HPP__COLOR_ACC_PRINT_FNS("Children", overhead_acc, OVERHEAD_ACC),
HPP__PRINT_FNS("Samples", samples, SAMPLES),
HPP__PRINT_FNS("Period", period, PERIOD)
};
struct perf_hpp_list perf_hpp_list = {
.fields = LIST_HEAD_INIT(perf_hpp_list.fields),
.sorts = LIST_HEAD_INIT(perf_hpp_list.sorts),
.nr_header_lines = 1,
};
#undef HPP__COLOR_PRINT_FNS
#undef HPP__COLOR_ACC_PRINT_FNS
#undef HPP__PRINT_FNS
#undef HPP_PERCENT_FNS
#undef HPP_PERCENT_ACC_FNS
#undef HPP_RAW_FNS
#undef __HPP_HEADER_FN
#undef __HPP_WIDTH_FN
#undef __HPP_COLOR_PERCENT_FN
#undef __HPP_ENTRY_PERCENT_FN
#undef __HPP_COLOR_ACC_PERCENT_FN
#undef __HPP_ENTRY_ACC_PERCENT_FN
#undef __HPP_ENTRY_RAW_FN
#undef __HPP_SORT_FN
#undef __HPP_SORT_ACC_FN
#undef __HPP_SORT_RAW_FN
void perf_hpp__init(void)
{
int i;
for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
struct perf_hpp_fmt *fmt = &perf_hpp__format[i];
INIT_LIST_HEAD(&fmt->list);
/* sort_list may be linked by setup_sorting() */
if (fmt->sort_list.next == NULL)
INIT_LIST_HEAD(&fmt->sort_list);
}
/*
* If user specified field order, no need to setup default fields.
*/
if (is_strict_order(field_order))
return;
if (symbol_conf.cumulate_callchain) {
hpp_dimension__add_output(PERF_HPP__OVERHEAD_ACC);
perf_hpp__format[PERF_HPP__OVERHEAD].name = "Self";
}
hpp_dimension__add_output(PERF_HPP__OVERHEAD);
if (symbol_conf.show_cpu_utilization) {
hpp_dimension__add_output(PERF_HPP__OVERHEAD_SYS);
hpp_dimension__add_output(PERF_HPP__OVERHEAD_US);
if (perf_guest) {
hpp_dimension__add_output(PERF_HPP__OVERHEAD_GUEST_SYS);
hpp_dimension__add_output(PERF_HPP__OVERHEAD_GUEST_US);
}
}
if (symbol_conf.show_nr_samples)
hpp_dimension__add_output(PERF_HPP__SAMPLES);
if (symbol_conf.show_total_period)
hpp_dimension__add_output(PERF_HPP__PERIOD);
}
void perf_hpp_list__column_register(struct perf_hpp_list *list,
struct perf_hpp_fmt *format)
{
list_add_tail(&format->list, &list->fields);
}
void perf_hpp_list__register_sort_field(struct perf_hpp_list *list,
struct perf_hpp_fmt *format)
{
list_add_tail(&format->sort_list, &list->sorts);
}
void perf_hpp__column_unregister(struct perf_hpp_fmt *format)
{
list_del(&format->list);
}
void perf_hpp__cancel_cumulate(void)
{
struct perf_hpp_fmt *fmt, *acc, *ovh, *tmp;
if (is_strict_order(field_order))
return;
ovh = &perf_hpp__format[PERF_HPP__OVERHEAD];
acc = &perf_hpp__format[PERF_HPP__OVERHEAD_ACC];
perf_hpp_list__for_each_format_safe(&perf_hpp_list, fmt, tmp) {
if (acc->equal(acc, fmt)) {
perf_hpp__column_unregister(fmt);
continue;
}
if (ovh->equal(ovh, fmt))
fmt->name = "Overhead";
}
}
static bool fmt_equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
{
return a->equal && a->equal(a, b);
}
void perf_hpp__setup_output_field(struct perf_hpp_list *list)
{
struct perf_hpp_fmt *fmt;
/* append sort keys to output field */
perf_hpp_list__for_each_sort_list(list, fmt) {
struct perf_hpp_fmt *pos;
perf_hpp_list__for_each_format(list, pos) {
if (fmt_equal(fmt, pos))
goto next;
}
perf_hpp__column_register(fmt);
next:
continue;
}
}
void perf_hpp__append_sort_keys(struct perf_hpp_list *list)
{
struct perf_hpp_fmt *fmt;
/* append output fields to sort keys */
perf_hpp_list__for_each_format(list, fmt) {
struct perf_hpp_fmt *pos;
perf_hpp_list__for_each_sort_list(list, pos) {
if (fmt_equal(fmt, pos))
goto next;
}
perf_hpp__register_sort_field(fmt);
next:
continue;
}
}
static void fmt_free(struct perf_hpp_fmt *fmt)
{
if (fmt->free)
fmt->free(fmt);
}
void perf_hpp__reset_output_field(struct perf_hpp_list *list)
{
struct perf_hpp_fmt *fmt, *tmp;
/* reset output fields */
perf_hpp_list__for_each_format_safe(list, fmt, tmp) {
list_del_init(&fmt->list);
list_del_init(&fmt->sort_list);
fmt_free(fmt);
}
/* reset sort keys */
perf_hpp_list__for_each_sort_list_safe(list, fmt, tmp) {
list_del_init(&fmt->list);
list_del_init(&fmt->sort_list);
fmt_free(fmt);
}
}
/*
* See hists__fprintf to match the column widths
*/
unsigned int hists__sort_list_width(struct hists *hists)
{
struct perf_hpp_fmt *fmt;
int ret = 0;
bool first = true;
struct perf_hpp dummy_hpp;
hists__for_each_format(hists, fmt) {
if (perf_hpp__should_skip(fmt, hists))
continue;
if (first)
first = false;
else
ret += 2;
ret += fmt->width(fmt, &dummy_hpp, hists);
}
if (verbose && hists__has(hists, sym)) /* Addr + origin */
ret += 3 + BITS_PER_LONG / 4;
return ret;
}
unsigned int hists__overhead_width(struct hists *hists)
{
struct perf_hpp_fmt *fmt;
int ret = 0;
bool first = true;
struct perf_hpp dummy_hpp;
hists__for_each_format(hists, fmt) {
if (perf_hpp__is_sort_entry(fmt) || perf_hpp__is_dynamic_entry(fmt))
break;
if (first)
first = false;
else
ret += 2;
ret += fmt->width(fmt, &dummy_hpp, hists);
}
return ret;
}
void perf_hpp__reset_width(struct perf_hpp_fmt *fmt, struct hists *hists)
{
if (perf_hpp__is_sort_entry(fmt))
return perf_hpp__reset_sort_width(fmt, hists);
if (perf_hpp__is_dynamic_entry(fmt))
return;
BUG_ON(fmt->idx >= PERF_HPP__MAX_INDEX);
switch (fmt->idx) {
case PERF_HPP__OVERHEAD:
case PERF_HPP__OVERHEAD_SYS:
case PERF_HPP__OVERHEAD_US:
case PERF_HPP__OVERHEAD_ACC:
fmt->len = 8;
break;
case PERF_HPP__OVERHEAD_GUEST_SYS:
case PERF_HPP__OVERHEAD_GUEST_US:
fmt->len = 9;
break;
case PERF_HPP__SAMPLES:
case PERF_HPP__PERIOD:
fmt->len = 12;
break;
default:
break;
}
}
void hists__reset_column_width(struct hists *hists)
{
struct perf_hpp_fmt *fmt;
struct perf_hpp_list_node *node;
hists__for_each_format(hists, fmt)
perf_hpp__reset_width(fmt, hists);
/* hierarchy entries have their own hpp list */
list_for_each_entry(node, &hists->hpp_formats, list) {
perf_hpp_list__for_each_format(&node->hpp, fmt)
perf_hpp__reset_width(fmt, hists);
}
}
void perf_hpp__set_user_width(const char *width_list_str)
{
struct perf_hpp_fmt *fmt;
const char *ptr = width_list_str;
perf_hpp_list__for_each_format(&perf_hpp_list, fmt) {
char *p;
int len = strtol(ptr, &p, 10);
fmt->user_len = len;
if (*p == ',')
ptr = p + 1;
else
break;
}
}
static int add_hierarchy_fmt(struct hists *hists, struct perf_hpp_fmt *fmt)
{
struct perf_hpp_list_node *node = NULL;
struct perf_hpp_fmt *fmt_copy;
bool found = false;
bool skip = perf_hpp__should_skip(fmt, hists);
list_for_each_entry(node, &hists->hpp_formats, list) {
if (node->level == fmt->level) {
found = true;
break;
}
}
if (!found) {
node = malloc(sizeof(*node));
if (node == NULL)
return -1;
node->skip = skip;
node->level = fmt->level;
perf_hpp_list__init(&node->hpp);
hists->nr_hpp_node++;
list_add_tail(&node->list, &hists->hpp_formats);
}
fmt_copy = perf_hpp_fmt__dup(fmt);
if (fmt_copy == NULL)
return -1;
if (!skip)
node->skip = false;
list_add_tail(&fmt_copy->list, &node->hpp.fields);
list_add_tail(&fmt_copy->sort_list, &node->hpp.sorts);
return 0;
}
int perf_hpp__setup_hists_formats(struct perf_hpp_list *list,
struct perf_evlist *evlist)
{
struct perf_evsel *evsel;
struct perf_hpp_fmt *fmt;
struct hists *hists;
int ret;
if (!symbol_conf.report_hierarchy)
return 0;
evlist__for_each_entry(evlist, evsel) {
hists = evsel__hists(evsel);
perf_hpp_list__for_each_sort_list(list, fmt) {
if (perf_hpp__is_dynamic_entry(fmt) &&
!perf_hpp__defined_dynamic_entry(fmt, hists))
continue;
ret = add_hierarchy_fmt(hists, fmt);
if (ret < 0)
return ret;
}
}
return 0;
}