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WSL2-Linux-Kernel
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perf target: Shorten perf_target__ to target__ 

Getting unwieldly long, for this app domain should be descriptive enough
and the use of __ to separate the class from the method names should
help with avoiding clashes with other code bases.

Reported-by: David Ahern <dsahern@gmail.com>
Suggested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20131112113427.GA4053@ghostprotocols.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2013-11-12 16:46:16 -03:00
Родитель 48095b721c
Коммит 602ad878d4
16 изменённых файлов: 99 добавлений и 109 удалений
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6
tools/perf/builtin-kvm.c
Просмотреть файл

@ -1510,13 +1510,13 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
/*
* target related setups
*/
err = perf_target__validate(&kvm->opts.target);
err = target__validate(&kvm->opts.target);
if (err) {
perf_target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
ui__warning("%s", errbuf);
}
if (perf_target__none(&kvm->opts.target))
if (target__none(&kvm->opts.target))
kvm->opts.target.system_wide = true;

14
tools/perf/builtin-record.c
Просмотреть файл

@ -506,7 +506,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
* (apart from group members) have enable_on_exec=1 set,
* so don't spoil it by prematurely enabling them.
*/
if (!perf_target__none(&opts->target))
if (!target__none(&opts->target))
perf_evlist__enable(evsel_list);
/*
@ -535,7 +535,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
* die with the process and we wait for that. Thus no need to
* disable events in this case.
*/
if (done && !disabled && !perf_target__none(&opts->target)) {
if (done && !disabled && !target__none(&opts->target)) {
perf_evlist__disable(evsel_list);
disabled = true;
}
@ -906,7 +906,7 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
argc = parse_options(argc, argv, record_options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc && perf_target__none(&rec->opts.target))
if (!argc && target__none(&rec->opts.target))
usage_with_options(record_usage, record_options);
if (nr_cgroups && !rec->opts.target.system_wide) {
@ -936,17 +936,17 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
goto out_symbol_exit;
}
err = perf_target__validate(&rec->opts.target);
err = target__validate(&rec->opts.target);
if (err) {
perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
ui__warning("%s", errbuf);
}
err = perf_target__parse_uid(&rec->opts.target);
err = target__parse_uid(&rec->opts.target);
if (err) {
int saved_errno = errno;
perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
ui__error("%s", errbuf);
err = -saved_errno;

21
tools/perf/builtin-stat.c
Просмотреть файл

@ -108,7 +108,7 @@ enum {
static struct perf_evlist *evsel_list;
static struct perf_target target = {
static struct target target = {
.uid = UINT_MAX,
};
@ -294,11 +294,10 @@ static int create_perf_stat_counter(struct perf_evsel *evsel)
attr->inherit = !no_inherit;
if (perf_target__has_cpu(&target))
if (target__has_cpu(&target))
return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
if (!perf_target__has_task(&target) &&
perf_evsel__is_group_leader(evsel)) {
if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
attr->disabled = 1;
if (!initial_delay)
attr->enable_on_exec = 1;
@ -1236,7 +1235,7 @@ static void print_stat(int argc, const char **argv)
fprintf(output, "\'system wide");
else if (target.cpu_list)
fprintf(output, "\'CPU(s) %s", target.cpu_list);
else if (!perf_target__has_task(&target)) {
else if (!target__has_task(&target)) {
fprintf(output, "\'%s", argv[0]);
for (i = 1; i < argc; i++)
fprintf(output, " %s", argv[i]);
@ -1667,7 +1666,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
} else if (big_num_opt == 0) /* User passed --no-big-num */
big_num = false;
if (!argc && perf_target__none(&target))
if (!argc && target__none(&target))
usage_with_options(stat_usage, options);
if (run_count < 0) {
@ -1680,8 +1679,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
}
/* no_aggr, cgroup are for system-wide only */
if ((aggr_mode != AGGR_GLOBAL || nr_cgroups)
&& !perf_target__has_cpu(&target)) {
if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
!target__has_cpu(&target)) {
fprintf(stderr, "both cgroup and no-aggregation "
"modes only available in system-wide mode\n");
@ -1694,14 +1693,14 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
if (add_default_attributes())
goto out;
perf_target__validate(&target);
target__validate(&target);
if (perf_evlist__create_maps(evsel_list, &target) < 0) {
if (perf_target__has_task(&target)) {
if (target__has_task(&target)) {
pr_err("Problems finding threads of monitor\n");
parse_options_usage(stat_usage, options, "p", 1);
parse_options_usage(NULL, options, "t", 1);
} else if (perf_target__has_cpu(&target)) {
} else if (target__has_cpu(&target)) {
perror("failed to parse CPUs map");
parse_options_usage(stat_usage, options, "C", 1);
parse_options_usage(NULL, options, "a", 1);

14
tools/perf/builtin-top.c
Просмотреть файл

@ -967,7 +967,7 @@ static int __cmd_top(struct perf_top *top)
* XXX 'top' still doesn't start workloads like record, trace, but should,
* so leave the check here.
*/
if (!perf_target__none(&opts->target))
if (!target__none(&opts->target))
perf_evlist__enable(top->evlist);
/* Wait for a minimal set of events before starting the snapshot */
@ -1053,7 +1053,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
.sym_pcnt_filter = 5,
};
struct perf_record_opts *opts = &top.record_opts;
struct perf_target *target = &opts->target;
struct target *target = &opts->target;
const struct option options[] = {
OPT_CALLBACK('e', "event", &top.evlist, "event",
"event selector. use 'perf list' to list available events",
@ -1169,24 +1169,24 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
setup_browser(false);
status = perf_target__validate(target);
status = target__validate(target);
if (status) {
perf_target__strerror(target, status, errbuf, BUFSIZ);
target__strerror(target, status, errbuf, BUFSIZ);
ui__warning("%s", errbuf);
}
status = perf_target__parse_uid(target);
status = target__parse_uid(target);
if (status) {
int saved_errno = errno;
perf_target__strerror(target, status, errbuf, BUFSIZ);
target__strerror(target, status, errbuf, BUFSIZ);
ui__error("%s", errbuf);
status = -saved_errno;
goto out_delete_evlist;
}
if (perf_target__none(target))
if (target__none(target))
target->system_wide = true;
if (perf_evlist__create_maps(top.evlist, target) < 0)

10
tools/perf/builtin-trace.c
Просмотреть файл

@ -2327,21 +2327,21 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
}
}
err = perf_target__validate(&trace.opts.target);
err = target__validate(&trace.opts.target);
if (err) {
perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
target__strerror(&trace.opts.target, err, bf, sizeof(bf));
fprintf(trace.output, "%s", bf);
goto out_close;
}
err = perf_target__parse_uid(&trace.opts.target);
err = target__parse_uid(&trace.opts.target);
if (err) {
perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
target__strerror(&trace.opts.target, err, bf, sizeof(bf));
fprintf(trace.output, "%s", bf);
goto out_close;
}
if (!argc && perf_target__none(&trace.opts.target))
if (!argc && target__none(&trace.opts.target))
trace.opts.target.system_wide = true;
if (input_name)

2
tools/perf/perf.h
Просмотреть файл

@ -248,7 +248,7 @@ enum perf_call_graph_mode {
};
struct perf_record_opts {
struct perf_target target;
struct target target;
int call_graph;
bool group;
bool inherit_stat;

2
tools/perf/tests/task-exit.c
Просмотреть файл

@ -28,7 +28,7 @@ int test__task_exit(void)
union perf_event *event;
struct perf_evsel *evsel;
struct perf_evlist *evlist;
struct perf_target target = {
struct target target = {
.uid = UINT_MAX,
.uses_mmap = true,
};

12
tools/perf/util/evlist.c
Просмотреть файл

@ -811,8 +811,7 @@ int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
return perf_evlist__mmap_per_cpu(evlist, prot, mask);
}
int perf_evlist__create_maps(struct perf_evlist *evlist,
struct perf_target *target)
int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target)
{
evlist->threads = thread_map__new_str(target->pid, target->tid,
target->uid);
@ -820,9 +819,9 @@ int perf_evlist__create_maps(struct perf_evlist *evlist,
if (evlist->threads == NULL)
return -1;
if (perf_target__has_task(target))
if (target__has_task(target))
evlist->cpus = cpu_map__dummy_new();
else if (!perf_target__has_cpu(target) && !target->uses_mmap)
else if (!target__has_cpu(target) && !target->uses_mmap)
evlist->cpus = cpu_map__dummy_new();
else
evlist->cpus = cpu_map__new(target->cpu_list);
@ -1031,8 +1030,7 @@ out_err:
return err;
}
int perf_evlist__prepare_workload(struct perf_evlist *evlist,
struct perf_target *target,
int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target,
const char *argv[], bool pipe_output,
bool want_signal)
{
@ -1084,7 +1082,7 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
exit(-1);
}
if (perf_target__none(target))
if (target__none(target))
evlist->threads->map[0] = evlist->workload.pid;
close(child_ready_pipe[1]);

5
tools/perf/util/evlist.h
Просмотреть файл

@ -102,7 +102,7 @@ void perf_evlist__config(struct perf_evlist *evlist,
int perf_record_opts__config(struct perf_record_opts *opts);
int perf_evlist__prepare_workload(struct perf_evlist *evlist,
struct perf_target *target,
struct target *target,
const char *argv[], bool pipe_output,
bool want_signal);
int perf_evlist__start_workload(struct perf_evlist *evlist);
@ -134,8 +134,7 @@ static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
evlist->threads = threads;
}
int perf_evlist__create_maps(struct perf_evlist *evlist,
struct perf_target *target);
int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target);
void perf_evlist__delete_maps(struct perf_evlist *evlist);
int perf_evlist__apply_filters(struct perf_evlist *evlist);

9
tools/perf/util/evsel.c
Просмотреть файл

@ -645,7 +645,7 @@ void perf_evsel__config(struct perf_evsel *evsel,
}
}
if (perf_target__has_cpu(&opts->target))
if (target__has_cpu(&opts->target))
perf_evsel__set_sample_bit(evsel, CPU);
if (opts->period)
@ -653,7 +653,7 @@ void perf_evsel__config(struct perf_evsel *evsel,
if (!perf_missing_features.sample_id_all &&
(opts->sample_time || !opts->no_inherit ||
perf_target__has_cpu(&opts->target)))
target__has_cpu(&opts->target)))
perf_evsel__set_sample_bit(evsel, TIME);
if (opts->raw_samples) {
@ -696,7 +696,7 @@ void perf_evsel__config(struct perf_evsel *evsel,
* Setting enable_on_exec for independent events and
* group leaders for traced executed by perf.
*/
if (perf_target__none(&opts->target) && perf_evsel__is_group_leader(evsel))
if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel))
attr->enable_on_exec = 1;
}
@ -2006,8 +2006,7 @@ bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
return false;
}
int perf_evsel__open_strerror(struct perf_evsel *evsel,
struct perf_target *target,
int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
int err, char *msg, size_t size)
{
switch (err) {

3
tools/perf/util/evsel.h
Просмотреть файл

@ -318,8 +318,7 @@ int perf_evsel__fprintf(struct perf_evsel *evsel,
bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
char *msg, size_t msgsize);
int perf_evsel__open_strerror(struct perf_evsel *evsel,
struct perf_target *target,
int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
int err, char *msg, size_t size);
static inline int perf_evsel__group_idx(struct perf_evsel *evsel)

6
tools/perf/util/machine.c
Просмотреть файл

@ -1396,12 +1396,12 @@ int machine__for_each_thread(struct machine *machine,
}
int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
struct perf_target *target, struct thread_map *threads,
struct target *target, struct thread_map *threads,
perf_event__handler_t process, bool data_mmap)
{
if (perf_target__has_task(target))
if (target__has_task(target))
return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
else if (perf_target__has_cpu(target))
else if (target__has_cpu(target))
return perf_event__synthesize_threads(tool, process, machine, data_mmap);
/* command specified */
return 0;

4
tools/perf/util/machine.h
Просмотреть файл

@ -180,10 +180,10 @@ int machine__for_each_thread(struct machine *machine,
void *priv);
int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
struct perf_target *target, struct thread_map *threads,
struct target *target, struct thread_map *threads,
perf_event__handler_t process, bool data_mmap);
static inline
int machine__synthesize_threads(struct machine *machine, struct perf_target *target,
int machine__synthesize_threads(struct machine *machine, struct target *target,
struct thread_map *threads, bool data_mmap)
{
return __machine__synthesize_threads(machine, NULL, target, threads,

54
tools/perf/util/target.c
Просмотреть файл

@ -13,9 +13,9 @@
#include <string.h>
enum perf_target_errno perf_target__validate(struct perf_target *target)
enum target_errno target__validate(struct target *target)
{
enum perf_target_errno ret = PERF_ERRNO_TARGET__SUCCESS;
enum target_errno ret = TARGET_ERRNO__SUCCESS;
if (target->pid)
target->tid = target->pid;
@ -23,42 +23,42 @@ enum perf_target_errno perf_target__validate(struct perf_target *target)
/* CPU and PID are mutually exclusive */
if (target->tid && target->cpu_list) {
target->cpu_list = NULL;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__PID_OVERRIDE_CPU;
if (ret == TARGET_ERRNO__SUCCESS)
ret = TARGET_ERRNO__PID_OVERRIDE_CPU;
}
/* UID and PID are mutually exclusive */
if (target->tid && target->uid_str) {
target->uid_str = NULL;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__PID_OVERRIDE_UID;
if (ret == TARGET_ERRNO__SUCCESS)
ret = TARGET_ERRNO__PID_OVERRIDE_UID;
}
/* UID and CPU are mutually exclusive */
if (target->uid_str && target->cpu_list) {
target->cpu_list = NULL;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__UID_OVERRIDE_CPU;
if (ret == TARGET_ERRNO__SUCCESS)
ret = TARGET_ERRNO__UID_OVERRIDE_CPU;
}
/* PID and SYSTEM are mutually exclusive */
if (target->tid && target->system_wide) {
target->system_wide = false;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__PID_OVERRIDE_SYSTEM;
if (ret == TARGET_ERRNO__SUCCESS)
ret = TARGET_ERRNO__PID_OVERRIDE_SYSTEM;
}
/* UID and SYSTEM are mutually exclusive */
if (target->uid_str && target->system_wide) {
target->system_wide = false;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM;
if (ret == TARGET_ERRNO__SUCCESS)
ret = TARGET_ERRNO__UID_OVERRIDE_SYSTEM;
}
return ret;
}
enum perf_target_errno perf_target__parse_uid(struct perf_target *target)
enum target_errno target__parse_uid(struct target *target)
{
struct passwd pwd, *result;
char buf[1024];
@ -66,7 +66,7 @@ enum perf_target_errno perf_target__parse_uid(struct perf_target *target)
target->uid = UINT_MAX;
if (str == NULL)
return PERF_ERRNO_TARGET__SUCCESS;
return TARGET_ERRNO__SUCCESS;
/* Try user name first */
getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
@ -79,22 +79,22 @@ enum perf_target_errno perf_target__parse_uid(struct perf_target *target)
int uid = strtol(str, &endptr, 10);
if (*endptr != '\0')
return PERF_ERRNO_TARGET__INVALID_UID;
return TARGET_ERRNO__INVALID_UID;
getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
if (result == NULL)
return PERF_ERRNO_TARGET__USER_NOT_FOUND;
return TARGET_ERRNO__USER_NOT_FOUND;
}
target->uid = result->pw_uid;
return PERF_ERRNO_TARGET__SUCCESS;
return TARGET_ERRNO__SUCCESS;
}
/*
* This must have a same ordering as the enum perf_target_errno.
* This must have a same ordering as the enum target_errno.
*/
static const char *perf_target__error_str[] = {
static const char *target__error_str[] = {
"PID/TID switch overriding CPU",
"PID/TID switch overriding UID",
"UID switch overriding CPU",
@ -104,7 +104,7 @@ static const char *perf_target__error_str[] = {
"Problems obtaining information for user %s",
};
int perf_target__strerror(struct perf_target *target, int errnum,
int target__strerror(struct target *target, int errnum,
char *buf, size_t buflen)
{
int idx;
@ -124,21 +124,19 @@ int perf_target__strerror(struct perf_target *target, int errnum,
return 0;
}
if (errnum < __PERF_ERRNO_TARGET__START ||
errnum >= __PERF_ERRNO_TARGET__END)
if (errnum < __TARGET_ERRNO__START || errnum >= __TARGET_ERRNO__END)
return -1;
idx = errnum - __PERF_ERRNO_TARGET__START;
msg = perf_target__error_str[idx];
idx = errnum - __TARGET_ERRNO__START;
msg = target__error_str[idx];
switch (errnum) {
case PERF_ERRNO_TARGET__PID_OVERRIDE_CPU
... PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM:
case TARGET_ERRNO__PID_OVERRIDE_CPU ... TARGET_ERRNO__UID_OVERRIDE_SYSTEM:
snprintf(buf, buflen, "%s", msg);
break;
case PERF_ERRNO_TARGET__INVALID_UID:
case PERF_ERRNO_TARGET__USER_NOT_FOUND:
case TARGET_ERRNO__INVALID_UID:
case TARGET_ERRNO__USER_NOT_FOUND:
snprintf(buf, buflen, msg, target->uid_str);
break;

44
tools/perf/util/target.h
Просмотреть файл

@ -4,7 +4,7 @@
#include <stdbool.h>
#include <sys/types.h>
struct perf_target {
struct target {
const char *pid;
const char *tid;
const char *cpu_list;
@ -14,8 +14,8 @@ struct perf_target {
bool uses_mmap;
};
enum perf_target_errno {
PERF_ERRNO_TARGET__SUCCESS = 0,
enum target_errno {
TARGET_ERRNO__SUCCESS = 0,
/*
* Choose an arbitrary negative big number not to clash with standard
@ -24,42 +24,40 @@ enum perf_target_errno {
*
* http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
*/
__PERF_ERRNO_TARGET__START = -10000,
__TARGET_ERRNO__START = -10000,
/* for target__validate() */
TARGET_ERRNO__PID_OVERRIDE_CPU = __TARGET_ERRNO__START,
TARGET_ERRNO__PID_OVERRIDE_UID,
TARGET_ERRNO__UID_OVERRIDE_CPU,
TARGET_ERRNO__PID_OVERRIDE_SYSTEM,
TARGET_ERRNO__UID_OVERRIDE_SYSTEM,
/* for perf_target__validate() */
PERF_ERRNO_TARGET__PID_OVERRIDE_CPU = __PERF_ERRNO_TARGET__START,
PERF_ERRNO_TARGET__PID_OVERRIDE_UID,
PERF_ERRNO_TARGET__UID_OVERRIDE_CPU,
PERF_ERRNO_TARGET__PID_OVERRIDE_SYSTEM,
PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM,
/* for target__parse_uid() */
TARGET_ERRNO__INVALID_UID,
TARGET_ERRNO__USER_NOT_FOUND,
/* for perf_target__parse_uid() */
PERF_ERRNO_TARGET__INVALID_UID,
PERF_ERRNO_TARGET__USER_NOT_FOUND,
__PERF_ERRNO_TARGET__END,
__TARGET_ERRNO__END,
};
enum perf_target_errno perf_target__validate(struct perf_target *target);
enum perf_target_errno perf_target__parse_uid(struct perf_target *target);
enum target_errno target__validate(struct target *target);
enum target_errno target__parse_uid(struct target *target);
int perf_target__strerror(struct perf_target *target, int errnum, char *buf,
size_t buflen);
int target__strerror(struct target *target, int errnum, char *buf, size_t buflen);
static inline bool perf_target__has_task(struct perf_target *target)
static inline bool target__has_task(struct target *target)
{
return target->tid || target->pid || target->uid_str;
}
static inline bool perf_target__has_cpu(struct perf_target *target)
static inline bool target__has_cpu(struct target *target)
{
return target->system_wide || target->cpu_list;
}
static inline bool perf_target__none(struct perf_target *target)
static inline bool target__none(struct target *target)
{
return !perf_target__has_task(target) && !perf_target__has_cpu(target);
return !target__has_task(target) && !target__has_cpu(target);
}
#endif /* _PERF_TARGET_H */

2
tools/perf/util/top.c
Просмотреть файл

@ -27,7 +27,7 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
float ksamples_per_sec;
float esamples_percent;
struct perf_record_opts *opts = &top->record_opts;
struct perf_target *target = &opts->target;
struct target *target = &opts->target;
size_t ret = 0;
if (top->samples) {