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perf evlist: Rename cpus to user_requested_cpus

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evlist contains cpus and all_cpus. all_cpus is the union of the cpu maps
of all evsels.

For non-task targets, cpus is set to be cpus requested from the command
line, defaulting to all online cpus if no cpus are specified.

For an uncore event, all_cpus may be just CPU 0 or every online CPU.

This causes all_cpus to have fewer values than the cpus variable which
is confusing given the 'all' in the name.

To try to make the behavior clearer, rename cpus to user_requested_cpus
and add comments on the two struct variables.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Antonov <alexander.antonov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: John Garry <john.garry@huawei.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yonghong Song <yhs@fb.com>
Cc: bpf@vger.kernel.org
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: netdev@vger.kernel.org
Link: http://lore.kernel.org/lkml/20220328232648.2127340-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2022-03-28 16:26:44 -07:00 committed by Arnaldo Carvalho de Melo
parent d4ff926592
commit 0df6ade711
19 changed files with 62 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
tools/lib/perf/evlist.c
View File

@ -41,10 +41,10 @@ static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
*/
if (!evsel->own_cpus || evlist->has_user_cpus) {
perf_cpu_map__put(evsel->cpus);
evsel->cpus = perf_cpu_map__get(evlist->cpus);
} else if (!evsel->system_wide && perf_cpu_map__empty(evlist->cpus)) {
evsel->cpus = perf_cpu_map__get(evlist->user_requested_cpus);
} else if (!evsel->system_wide && perf_cpu_map__empty(evlist->user_requested_cpus)) {
perf_cpu_map__put(evsel->cpus);
evsel->cpus = perf_cpu_map__get(evlist->cpus);
evsel->cpus = perf_cpu_map__get(evlist->user_requested_cpus);
} else if (evsel->cpus != evsel->own_cpus) {
perf_cpu_map__put(evsel->cpus);
evsel->cpus = perf_cpu_map__get(evsel->own_cpus);
@ -123,10 +123,10 @@ static void perf_evlist__purge(struct perf_evlist *evlist)
void perf_evlist__exit(struct perf_evlist *evlist)
{
perf_cpu_map__put(evlist->cpus);
perf_cpu_map__put(evlist->user_requested_cpus);
perf_cpu_map__put(evlist->all_cpus);
perf_thread_map__put(evlist->threads);
evlist->cpus = NULL;
evlist->user_requested_cpus = NULL;
evlist->all_cpus = NULL;
evlist->threads = NULL;
fdarray__exit(&evlist->pollfd);
@ -155,9 +155,9 @@ void perf_evlist__set_maps(struct perf_evlist *evlist,
* original reference count of 1. If that is not the case it is up to
* the caller to increase the reference count.
*/
if (cpus != evlist->cpus) {
perf_cpu_map__put(evlist->cpus);
evlist->cpus = perf_cpu_map__get(cpus);
if (cpus != evlist->user_requested_cpus) {
perf_cpu_map__put(evlist->user_requested_cpus);
evlist->user_requested_cpus = perf_cpu_map__get(cpus);
}
if (threads != evlist->threads) {
@ -294,7 +294,7 @@ int perf_evlist__id_add_fd(struct perf_evlist *evlist,
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
{
int nr_cpus = perf_cpu_map__nr(evlist->cpus);
int nr_cpus = perf_cpu_map__nr(evlist->user_requested_cpus);
int nr_threads = perf_thread_map__nr(evlist->threads);
int nfds = 0;
struct perf_evsel *evsel;
@ -426,7 +426,7 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
int idx, struct perf_mmap_param *mp, int cpu_idx,
int thread, int *_output, int *_output_overwrite)
{
struct perf_cpu evlist_cpu = perf_cpu_map__cpu(evlist->cpus, cpu_idx);
struct perf_cpu evlist_cpu = perf_cpu_map__cpu(evlist->user_requested_cpus, cpu_idx);
struct perf_evsel *evsel;
int revent;
@ -536,7 +536,7 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
struct perf_mmap_param *mp)
{
int nr_threads = perf_thread_map__nr(evlist->threads);
int nr_cpus = perf_cpu_map__nr(evlist->cpus);
int nr_cpus = perf_cpu_map__nr(evlist->user_requested_cpus);
int cpu, thread;
for (cpu = 0; cpu < nr_cpus; cpu++) {
@ -564,8 +564,8 @@ static int perf_evlist__nr_mmaps(struct perf_evlist *evlist)
{
int nr_mmaps;
nr_mmaps = perf_cpu_map__nr(evlist->cpus);
if (perf_cpu_map__empty(evlist->cpus))
nr_mmaps = perf_cpu_map__nr(evlist->user_requested_cpus);
if (perf_cpu_map__empty(evlist->user_requested_cpus))
nr_mmaps = perf_thread_map__nr(evlist->threads);
return nr_mmaps;
@ -576,7 +576,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
struct perf_mmap_param *mp)
{
struct perf_evsel *evsel;
const struct perf_cpu_map *cpus = evlist->cpus;
const struct perf_cpu_map *cpus = evlist->user_requested_cpus;
const struct perf_thread_map *threads = evlist->threads;
if (!ops || !ops->get || !ops->mmap)

7
tools/lib/perf/include/internal/evlist.h
View File

@ -19,7 +19,12 @@ struct perf_evlist {
int nr_entries;
int nr_groups;
bool has_user_cpus;
struct perf_cpu_map *cpus;
/**
* The cpus passed from the command line or all online CPUs by
* default.
*/
struct perf_cpu_map *user_requested_cpus;
/** The union of all evsel cpu maps. */
struct perf_cpu_map *all_cpus;
struct perf_thread_map *threads;
int nr_mmaps;

8
tools/perf/arch/arm/util/cs-etm.c
View File

@ -199,7 +199,7 @@ static int cs_etm_set_option(struct auxtrace_record *itr,
struct evsel *evsel, u32 option)
{
int i, err = -EINVAL;
struct perf_cpu_map *event_cpus = evsel->evlist->core.cpus;
struct perf_cpu_map *event_cpus = evsel->evlist->core.user_requested_cpus;
struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);
/* Set option of each CPU we have */
@ -299,7 +299,7 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
struct evsel *evsel, *cs_etm_evsel = NULL;
struct perf_cpu_map *cpus = evlist->core.cpus;
struct perf_cpu_map *cpus = evlist->core.user_requested_cpus;
bool privileged = perf_event_paranoid_check(-1);
int err = 0;
@ -522,7 +522,7 @@ cs_etm_info_priv_size(struct auxtrace_record *itr __maybe_unused,
{
int i;
int etmv3 = 0, etmv4 = 0, ete = 0;
struct perf_cpu_map *event_cpus = evlist->core.cpus;
struct perf_cpu_map *event_cpus = evlist->core.user_requested_cpus;
struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);
/* cpu map is not empty, we have specific CPUs to work with */
@ -713,7 +713,7 @@ static int cs_etm_info_fill(struct auxtrace_record *itr,
u32 offset;
u64 nr_cpu, type;
struct perf_cpu_map *cpu_map;
struct perf_cpu_map *event_cpus = session->evlist->core.cpus;
struct perf_cpu_map *event_cpus = session->evlist->core.user_requested_cpus;
struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);

2
tools/perf/arch/arm64/util/arm-spe.c
View File

@ -144,7 +144,7 @@ static int arm_spe_recording_options(struct auxtrace_record *itr,
container_of(itr, struct arm_spe_recording, itr);
struct perf_pmu *arm_spe_pmu = sper->arm_spe_pmu;
struct evsel *evsel, *arm_spe_evsel = NULL;
struct perf_cpu_map *cpus = evlist->core.cpus;
struct perf_cpu_map *cpus = evlist->core.user_requested_cpus;
bool privileged = perf_event_paranoid_check(-1);
struct evsel *tracking_evsel;
int err;

2
tools/perf/arch/x86/util/intel-bts.c
View File

@ -110,7 +110,7 @@ static int intel_bts_recording_options(struct auxtrace_record *itr,
container_of(itr, struct intel_bts_recording, itr);
struct perf_pmu *intel_bts_pmu = btsr->intel_bts_pmu;
struct evsel *evsel, *intel_bts_evsel = NULL;
const struct perf_cpu_map *cpus = evlist->core.cpus;
const struct perf_cpu_map *cpus = evlist->core.user_requested_cpus;
bool privileged = perf_event_paranoid_check(-1);
if (opts->auxtrace_sample_mode) {

4
tools/perf/arch/x86/util/intel-pt.c
View File

@ -382,7 +382,7 @@ static int intel_pt_info_fill(struct auxtrace_record *itr,
ui__warning("Intel Processor Trace: TSC not available\n");
}
per_cpu_mmaps = !perf_cpu_map__empty(session->evlist->core.cpus);
per_cpu_mmaps = !perf_cpu_map__empty(session->evlist->core.user_requested_cpus);
auxtrace_info->type = PERF_AUXTRACE_INTEL_PT;
auxtrace_info->priv[INTEL_PT_PMU_TYPE] = intel_pt_pmu->type;
@ -632,7 +632,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
struct perf_pmu *intel_pt_pmu = ptr->intel_pt_pmu;
bool have_timing_info, need_immediate = false;
struct evsel *evsel, *intel_pt_evsel = NULL;
const struct perf_cpu_map *cpus = evlist->core.cpus;
const struct perf_cpu_map *cpus = evlist->core.user_requested_cpus;
bool privileged = perf_event_paranoid_check(-1);
u64 tsc_bit;
int err;

2
tools/perf/bench/evlist-open-close.c
View File

@ -151,7 +151,7 @@ static int bench_evlist_open_close__run(char *evstr)
init_stats(&time_stats);
printf(" Number of cpus:\t%d\n", perf_cpu_map__nr(evlist->core.cpus));
printf(" Number of cpus:\t%d\n", perf_cpu_map__nr(evlist->core.user_requested_cpus));
printf(" Number of threads:\t%d\n", evlist->core.threads->nr);
printf(" Number of events:\t%d (%d fds)\n",
evlist->core.nr_entries, evlist__count_evsel_fds(evlist));

2
tools/perf/builtin-ftrace.c
View File

@ -301,7 +301,7 @@ static int set_tracing_cpumask(struct perf_cpu_map *cpumap)
static int set_tracing_cpu(struct perf_ftrace *ftrace)
{
struct perf_cpu_map *cpumap = ftrace->evlist->core.cpus;
struct perf_cpu_map *cpumap = ftrace->evlist->core.user_requested_cpus;
if (!target__has_cpu(&ftrace->target))
return 0;

6
tools/perf/builtin-record.c
View File

@ -987,7 +987,7 @@ static int record__thread_data_init_maps(struct record_thread *thread_data, stru
int m, tm, nr_mmaps = evlist->core.nr_mmaps;
struct mmap *mmap = evlist->mmap;
struct mmap *overwrite_mmap = evlist->overwrite_mmap;
struct perf_cpu_map *cpus = evlist->core.cpus;
struct perf_cpu_map *cpus = evlist->core.user_requested_cpus;
thread_data->nr_mmaps = bitmap_weight(thread_data->mask->maps.bits,
thread_data->mask->maps.nbits);
@ -1881,7 +1881,7 @@ static int record__synthesize(struct record *rec, bool tail)
return err;
}
err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->core.cpus,
err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->core.user_requested_cpus,
process_synthesized_event, NULL);
if (err < 0) {
pr_err("Couldn't synthesize cpu map.\n");
@ -3675,7 +3675,7 @@ static int record__init_thread_default_masks(struct record *rec, struct perf_cpu
static int record__init_thread_masks(struct record *rec)
{
int ret = 0;
struct perf_cpu_map *cpus = rec->evlist->core.cpus;
struct perf_cpu_map *cpus = rec->evlist->core.user_requested_cpus;
if (!record__threads_enabled(rec))
return record__init_thread_default_masks(rec, cpus);

10
tools/perf/builtin-stat.c
View File

@ -804,7 +804,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
if (group)
evlist__set_leader(evsel_list);
if (!cpu_map__is_dummy(evsel_list->core.cpus)) {
if (!cpu_map__is_dummy(evsel_list->core.user_requested_cpus)) {
if (affinity__setup(&saved_affinity) < 0)
return -1;
affinity = &saved_affinity;
@ -1458,7 +1458,7 @@ static int perf_stat_init_aggr_mode(void)
aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode);
if (get_id) {
stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.cpus,
stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
get_id, /*data=*/NULL);
if (!stat_config.aggr_map) {
pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
@ -1472,8 +1472,8 @@ static int perf_stat_init_aggr_mode(void)
* taking the highest cpu number to be the size of
* the aggregation translate cpumap.
*/
if (evsel_list->core.cpus)
nr = perf_cpu_map__max(evsel_list->core.cpus).cpu;
if (evsel_list->core.user_requested_cpus)
nr = perf_cpu_map__max(evsel_list->core.user_requested_cpus).cpu;
else
nr = 0;
stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
@ -1630,7 +1630,7 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
if (!get_id)
return 0;
stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.cpus, get_id, env);
stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus, get_id, env);
if (!stat_config.aggr_map) {
pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
return -1;

2
tools/perf/builtin-top.c
View File

@ -1021,7 +1021,7 @@ static int perf_top__start_counters(struct perf_top *top)
evlist__for_each_entry(evlist, counter) {
try_again:
if (evsel__open(counter, top->evlist->core.cpus,
if (evsel__open(counter, top->evlist->core.user_requested_cpus,
top->evlist->core.threads) < 0) {
/*

2
tools/perf/util/auxtrace.c
View File

@ -174,7 +174,7 @@ void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
mp->idx = idx;
if (per_cpu) {
mp->cpu = perf_cpu_map__cpu(evlist->core.cpus, idx);
mp->cpu = perf_cpu_map__cpu(evlist->core.user_requested_cpus, idx);
if (evlist->core.threads)
mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
else

4
tools/perf/util/bpf_ftrace.c
View File

@ -38,7 +38,7 @@ int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace)
/* don't need to set cpu filter for system-wide mode */
if (ftrace->target.cpu_list) {
ncpus = perf_cpu_map__nr(ftrace->evlist->core.cpus);
ncpus = perf_cpu_map__nr(ftrace->evlist->core.user_requested_cpus);
bpf_map__set_max_entries(skel->maps.cpu_filter, ncpus);
}
@ -63,7 +63,7 @@ int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace)
fd = bpf_map__fd(skel->maps.cpu_filter);
for (i = 0; i < ncpus; i++) {
cpu = perf_cpu_map__cpu(ftrace->evlist->core.cpus, i).cpu;
cpu = perf_cpu_map__cpu(ftrace->evlist->core.user_requested_cpus, i).cpu;
bpf_map_update_elem(fd, &cpu, &val, BPF_ANY);
}
}

15
tools/perf/util/evlist.c
View File

@ -440,7 +440,7 @@ static void __evlist__disable(struct evlist *evlist, char *evsel_name)
bool has_imm = false;
// See explanation in evlist__close()
if (!cpu_map__is_dummy(evlist->core.cpus)) {
if (!cpu_map__is_dummy(evlist->core.user_requested_cpus)) {
if (affinity__setup(&saved_affinity) < 0)
return;
affinity = &saved_affinity;
@ -500,7 +500,7 @@ static void __evlist__enable(struct evlist *evlist, char *evsel_name)
struct affinity saved_affinity, *affinity = NULL;
// See explanation in evlist__close()
if (!cpu_map__is_dummy(evlist->core.cpus)) {
if (!cpu_map__is_dummy(evlist->core.user_requested_cpus)) {
if (affinity__setup(&saved_affinity) < 0)
return;
affinity = &saved_affinity;
@ -565,7 +565,7 @@ static int evlist__enable_event_cpu(struct evlist *evlist, struct evsel *evsel,
static int evlist__enable_event_thread(struct evlist *evlist, struct evsel *evsel, int thread)
{
int cpu;
int nr_cpus = perf_cpu_map__nr(evlist->core.cpus);
int nr_cpus = perf_cpu_map__nr(evlist->core.user_requested_cpus);
if (!evsel->core.fd)
return -EINVAL;
@ -580,7 +580,7 @@ static int evlist__enable_event_thread(struct evlist *evlist, struct evsel *evse
int evlist__enable_event_idx(struct evlist *evlist, struct evsel *evsel, int idx)
{
bool per_cpu_mmaps = !perf_cpu_map__empty(evlist->core.cpus);
bool per_cpu_mmaps = !perf_cpu_map__empty(evlist->core.user_requested_cpus);
if (per_cpu_mmaps)
return evlist__enable_event_cpu(evlist, evsel, idx);
@ -1301,10 +1301,11 @@ void evlist__close(struct evlist *evlist)
struct affinity affinity;
/*
* With perf record core.cpus is usually NULL.
* With perf record core.user_requested_cpus is usually NULL.
* Use the old method to handle this for now.
*/
if (!evlist->core.cpus || cpu_map__is_dummy(evlist->core.cpus)) {
if (!evlist->core.user_requested_cpus ||
cpu_map__is_dummy(evlist->core.user_requested_cpus)) {
evlist__for_each_entry_reverse(evlist, evsel)
evsel__close(evsel);
return;
@ -1367,7 +1368,7 @@ int evlist__open(struct evlist *evlist)
* Default: one fd per CPU, all threads, aka systemwide
* as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL
*/
if (evlist->core.threads == NULL && evlist->core.cpus == NULL) {
if (evlist->core.threads == NULL && evlist->core.user_requested_cpus == NULL) {
err = evlist__create_syswide_maps(evlist);
if (err < 0)
goto out_err;

6
tools/perf/util/record.c
View File

@ -106,7 +106,7 @@ void evlist__config(struct evlist *evlist, struct record_opts *opts, struct call
if (opts->group)
evlist__set_leader(evlist);
if (perf_cpu_map__cpu(evlist->core.cpus, 0).cpu < 0)
if (perf_cpu_map__cpu(evlist->core.user_requested_cpus, 0).cpu < 0)
opts->no_inherit = true;
use_comm_exec = perf_can_comm_exec();
@ -244,7 +244,7 @@ bool evlist__can_select_event(struct evlist *evlist, const char *str)
evsel = evlist__last(temp_evlist);
if (!evlist || perf_cpu_map__empty(evlist->core.cpus)) {
if (!evlist || perf_cpu_map__empty(evlist->core.user_requested_cpus)) {
struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);
if (cpus)
@ -252,7 +252,7 @@ bool evlist__can_select_event(struct evlist *evlist, const char *str)
perf_cpu_map__put(cpus);
} else {
cpu = perf_cpu_map__cpu(evlist->core.cpus, 0);
cpu = perf_cpu_map__cpu(evlist->core.user_requested_cpus, 0);
}
while (1) {

3
tools/perf/util/sideband_evlist.c
View File

@ -114,7 +114,8 @@ int evlist__start_sb_thread(struct evlist *evlist, struct target *target)
}
evlist__for_each_entry(evlist, counter) {
if (evsel__open(counter, evlist->core.cpus, evlist->core.threads) < 0)
if (evsel__open(counter, evlist->core.user_requested_cpus,
evlist->core.threads) < 0)
goto out_delete_evlist;
}

2
tools/perf/util/stat-display.c
View File

@ -929,7 +929,7 @@ static void print_no_aggr_metric(struct perf_stat_config *config,
int all_idx;
struct perf_cpu cpu;
perf_cpu_map__for_each_cpu(cpu, all_idx, evlist->core.cpus) {
perf_cpu_map__for_each_cpu(cpu, all_idx, evlist->core.user_requested_cpus) {
struct evsel *counter;
bool first = true;

2
tools/perf/util/synthetic-events.c
View File

@ -2127,7 +2127,7 @@ int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct p
return err;
}
err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL);
err = perf_event__synthesize_cpu_map(tool, evlist->core.user_requested_cpus, process, NULL);
if (err < 0) {
pr_err("Couldn't synthesize thread map.\n");
return err;

8
tools/perf/util/top.c
View File

@ -95,15 +95,17 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
if (target->cpu_list)
ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
perf_cpu_map__nr(top->evlist->core.cpus) > 1 ? "s" : "",
perf_cpu_map__nr(top->evlist->core.user_requested_cpus) > 1
? "s" : "",
target->cpu_list);
else {
if (target->tid)
ret += SNPRINTF(bf + ret, size - ret, ")");
else
ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
perf_cpu_map__nr(top->evlist->core.cpus),
perf_cpu_map__nr(top->evlist->core.cpus) > 1 ? "s" : "");
perf_cpu_map__nr(top->evlist->core.user_requested_cpus),
perf_cpu_map__nr(top->evlist->core.user_requested_cpus) > 1
? "s" : "");
}
perf_top__reset_sample_counters(top);