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Subject[tip:perf/core] libperf: Add perf_cpu_map__new()/perf_cpu_map__read() functions
Commit-ID:  9c3516d1b850ea938b074df33e4c86d721c77720
Gitweb: https://git.kernel.org/tip/9c3516d1b850ea938b074df33e4c86d721c77720
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Sun, 21 Jul 2019 13:24:30 +0200
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 29 Jul 2019 18:34:45 -0300

libperf: Add perf_cpu_map__new()/perf_cpu_map__read() functions

Moving the following functions from tools/perf:

cpu_map__new()
cpu_map__read()

to libperf with the following names:

perf_cpu_map__new()
perf_cpu_map__read()

Committer notes:

Fixed up this one:

tools/perf/arch/arm/util/cs-etm.c

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-44-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/arm/util/cs-etm.c | 6 +-
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 3 +-
tools/perf/bench/epoll-ctl.c | 3 +-
tools/perf/bench/epoll-wait.c | 3 +-
tools/perf/bench/futex-hash.c | 3 +-
tools/perf/bench/futex-lock-pi.c | 3 +-
tools/perf/bench/futex-requeue.c | 3 +-
tools/perf/bench/futex-wake-parallel.c | 2 +-
tools/perf/bench/futex-wake.c | 3 +-
tools/perf/builtin-ftrace.c | 2 +-
tools/perf/builtin-sched.c | 4 +-
tools/perf/lib/cpumap.c | 184 +++++++++++++++++++++++++++
tools/perf/lib/include/internal/cpumap.h | 4 +
tools/perf/lib/include/perf/cpumap.h | 3 +
tools/perf/lib/libperf.map | 2 +
tools/perf/tests/bitmap.c | 3 +-
tools/perf/tests/code-reading.c | 5 +-
tools/perf/tests/cpumap.c | 7 +-
tools/perf/tests/event-times.c | 9 +-
tools/perf/tests/event_update.c | 3 +-
tools/perf/tests/keep-tracking.c | 3 +-
tools/perf/tests/mem2node.c | 3 +-
tools/perf/tests/mmap-basic.c | 3 +-
tools/perf/tests/openat-syscall-all-cpus.c | 2 +-
tools/perf/tests/switch-tracking.c | 5 +-
tools/perf/tests/topology.c | 3 +-
tools/perf/util/cpumap.c | 181 +-------------------------
tools/perf/util/cpumap.h | 2 -
tools/perf/util/cputopo.c | 5 +-
tools/perf/util/evlist.c | 5 +-
tools/perf/util/header.c | 3 +-
tools/perf/util/parse-events.c | 3 +-
tools/perf/util/pmu.c | 3 +-
tools/perf/util/python.c | 3 +-
tools/perf/util/record.c | 7 +-
tools/perf/util/session.c | 3 +-
tools/perf/util/svghelper.c | 3 +-
37 files changed, 265 insertions(+), 227 deletions(-)

diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c
index f5aafdec7f50..c25bc1528b96 100644
--- a/tools/perf/arch/arm/util/cs-etm.c
+++ b/tools/perf/arch/arm/util/cs-etm.c
@@ -156,7 +156,7 @@ static int cs_etm_set_option(struct auxtrace_record *itr,
{
int i, err = -EINVAL;
struct perf_cpu_map *event_cpus = evsel->evlist->cpus;
- struct perf_cpu_map *online_cpus = cpu_map__new(NULL);
+ struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);

/* Set option of each CPU we have */
for (i = 0; i < cpu__max_cpu(); i++) {
@@ -490,7 +490,7 @@ cs_etm_info_priv_size(struct auxtrace_record *itr __maybe_unused,
int i;
int etmv3 = 0, etmv4 = 0;
struct perf_cpu_map *event_cpus = evlist->cpus;
- struct perf_cpu_map *online_cpus = cpu_map__new(NULL);
+ struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);

/* cpu map is not empty, we have specific CPUs to work with */
if (!cpu_map__empty(event_cpus)) {
@@ -637,7 +637,7 @@ static int cs_etm_info_fill(struct auxtrace_record *itr,
u64 nr_cpu, type;
struct perf_cpu_map *cpu_map;
struct perf_cpu_map *event_cpus = session->evlist->cpus;
- struct perf_cpu_map *online_cpus = cpu_map__new(NULL);
+ struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index 07129e007eb0..261bdd680651 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -5,6 +5,7 @@
#include <unistd.h>
#include <linux/types.h>
#include <sys/prctl.h>
+#include <perf/cpumap.h>

#include "parse-events.h"
#include "evlist.h"
@@ -65,7 +66,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
threads = thread_map__new(-1, getpid(), UINT_MAX);
CHECK_NOT_NULL__(threads);

- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
CHECK_NOT_NULL__(cpus);

evlist = evlist__new();
diff --git a/tools/perf/bench/epoll-ctl.c b/tools/perf/bench/epoll-ctl.c
index 1fd724f1d48b..84658d45f349 100644
--- a/tools/perf/bench/epoll-ctl.c
+++ b/tools/perf/bench/epoll-ctl.c
@@ -20,6 +20,7 @@
#include <sys/resource.h>
#include <sys/epoll.h>
#include <sys/eventfd.h>
+#include <perf/cpumap.h>

#include "../util/stat.h"
#include <subcmd/parse-options.h>
@@ -315,7 +316,7 @@ int bench_epoll_ctl(int argc, const char **argv)
act.sa_sigaction = toggle_done;
sigaction(SIGINT, &act, NULL);

- cpu = cpu_map__new(NULL);
+ cpu = perf_cpu_map__new(NULL);
if (!cpu)
goto errmem;

diff --git a/tools/perf/bench/epoll-wait.c b/tools/perf/bench/epoll-wait.c
index 79a254fff2d1..c27a65639cfb 100644
--- a/tools/perf/bench/epoll-wait.c
+++ b/tools/perf/bench/epoll-wait.c
@@ -75,6 +75,7 @@
#include <sys/epoll.h>
#include <sys/eventfd.h>
#include <sys/types.h>
+#include <perf/cpumap.h>

#include "../util/stat.h"
#include <subcmd/parse-options.h>
@@ -429,7 +430,7 @@ int bench_epoll_wait(int argc, const char **argv)
act.sa_sigaction = toggle_done;
sigaction(SIGINT, &act, NULL);

- cpu = cpu_map__new(NULL);
+ cpu = perf_cpu_map__new(NULL);
if (!cpu)
goto errmem;

diff --git a/tools/perf/bench/futex-hash.c b/tools/perf/bench/futex-hash.c
index b4fea8e3a368..80e138904c66 100644
--- a/tools/perf/bench/futex-hash.c
+++ b/tools/perf/bench/futex-hash.c
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/zalloc.h>
#include <sys/time.h>
+#include <perf/cpumap.h>

#include "../util/stat.h"
#include <subcmd/parse-options.h>
@@ -132,7 +133,7 @@ int bench_futex_hash(int argc, const char **argv)
exit(EXIT_FAILURE);
}

- cpu = cpu_map__new(NULL);
+ cpu = perf_cpu_map__new(NULL);
if (!cpu)
goto errmem;

diff --git a/tools/perf/bench/futex-lock-pi.c b/tools/perf/bench/futex-lock-pi.c
index 596769924709..c5d6d0abbaa9 100644
--- a/tools/perf/bench/futex-lock-pi.c
+++ b/tools/perf/bench/futex-lock-pi.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/zalloc.h>
#include <errno.h>
+#include <perf/cpumap.h>
#include "bench.h"
#include "futex.h"
#include "cpumap.h"
@@ -156,7 +157,7 @@ int bench_futex_lock_pi(int argc, const char **argv)
if (argc)
goto err;

- cpu = cpu_map__new(NULL);
+ cpu = perf_cpu_map__new(NULL);
if (!cpu)
err(EXIT_FAILURE, "calloc");

diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c
index 1fd32a4f9c14..75d3418c1a88 100644
--- a/tools/perf/bench/futex-requeue.c
+++ b/tools/perf/bench/futex-requeue.c
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/time64.h>
#include <errno.h>
+#include <perf/cpumap.h>
#include "bench.h"
#include "futex.h"
#include "cpumap.h"
@@ -123,7 +124,7 @@ int bench_futex_requeue(int argc, const char **argv)
if (argc)
goto err;

- cpu = cpu_map__new(NULL);
+ cpu = perf_cpu_map__new(NULL);
if (!cpu)
err(EXIT_FAILURE, "cpu_map__new");

diff --git a/tools/perf/bench/futex-wake-parallel.c b/tools/perf/bench/futex-wake-parallel.c
index 884c73e5bd1b..163fe16c275a 100644
--- a/tools/perf/bench/futex-wake-parallel.c
+++ b/tools/perf/bench/futex-wake-parallel.c
@@ -237,7 +237,7 @@ int bench_futex_wake_parallel(int argc, const char **argv)
act.sa_sigaction = toggle_done;
sigaction(SIGINT, &act, NULL);

- cpu = cpu_map__new(NULL);
+ cpu = perf_cpu_map__new(NULL);
if (!cpu)
err(EXIT_FAILURE, "calloc");

diff --git a/tools/perf/bench/futex-wake.c b/tools/perf/bench/futex-wake.c
index 2288fa8412ff..77dcdc13618a 100644
--- a/tools/perf/bench/futex-wake.c
+++ b/tools/perf/bench/futex-wake.c
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/time64.h>
#include <errno.h>
+#include <perf/cpumap.h>
#include "bench.h"
#include "futex.h"
#include "cpumap.h"
@@ -131,7 +132,7 @@ int bench_futex_wake(int argc, const char **argv)
exit(EXIT_FAILURE);
}

- cpu = cpu_map__new(NULL);
+ cpu = perf_cpu_map__new(NULL);
if (!cpu)
err(EXIT_FAILURE, "calloc");

diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 6943352b8d94..77989254fdd8 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -202,7 +202,7 @@ static int set_tracing_cpu(struct perf_ftrace *ftrace)

static int reset_tracing_cpu(void)
{
- struct perf_cpu_map *cpumap = cpu_map__new(NULL);
+ struct perf_cpu_map *cpumap = perf_cpu_map__new(NULL);
int ret;

ret = set_tracing_cpumask(cpumap);
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 897d11c8ca2e..0d6b4c3b1a51 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -3183,7 +3183,7 @@ static int setup_map_cpus(struct perf_sched *sched)
if (!sched->map.cpus_str)
return 0;

- map = cpu_map__new(sched->map.cpus_str);
+ map = perf_cpu_map__new(sched->map.cpus_str);
if (!map) {
pr_err("failed to get cpus map from %s\n", sched->map.cpus_str);
return -1;
@@ -3217,7 +3217,7 @@ static int setup_color_cpus(struct perf_sched *sched)
if (!sched->map.color_cpus_str)
return 0;

- map = cpu_map__new(sched->map.color_cpus_str);
+ map = perf_cpu_map__new(sched->map.color_cpus_str);
if (!map) {
pr_err("failed to get thread map from %s\n", sched->map.color_cpus_str);
return -1;
diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
index f3cfb4c71106..a5d4f7ff7174 100644
--- a/tools/perf/lib/cpumap.c
+++ b/tools/perf/lib/cpumap.c
@@ -5,6 +5,10 @@
#include <internal/cpumap.h>
#include <asm/bug.h>
#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <limits.h>

struct perf_cpu_map *perf_cpu_map__dummy_new(void)
{
@@ -40,3 +44,183 @@ void perf_cpu_map__put(struct perf_cpu_map *map)
if (map && refcount_dec_and_test(&map->refcnt))
cpu_map__delete(map);
}
+
+static struct perf_cpu_map *cpu_map__default_new(void)
+{
+ struct perf_cpu_map *cpus;
+ int nr_cpus;
+
+ nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ if (nr_cpus < 0)
+ return NULL;
+
+ cpus = malloc(sizeof(*cpus) + nr_cpus * sizeof(int));
+ if (cpus != NULL) {
+ int i;
+
+ for (i = 0; i < nr_cpus; ++i)
+ cpus->map[i] = i;
+
+ cpus->nr = nr_cpus;
+ refcount_set(&cpus->refcnt, 1);
+ }
+
+ return cpus;
+}
+
+static struct perf_cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus)
+{
+ size_t payload_size = nr_cpus * sizeof(int);
+ struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + payload_size);
+
+ if (cpus != NULL) {
+ cpus->nr = nr_cpus;
+ memcpy(cpus->map, tmp_cpus, payload_size);
+ refcount_set(&cpus->refcnt, 1);
+ }
+
+ return cpus;
+}
+
+struct perf_cpu_map *perf_cpu_map__read(FILE *file)
+{
+ struct perf_cpu_map *cpus = NULL;
+ int nr_cpus = 0;
+ int *tmp_cpus = NULL, *tmp;
+ int max_entries = 0;
+ int n, cpu, prev;
+ char sep;
+
+ sep = 0;
+ prev = -1;
+ for (;;) {
+ n = fscanf(file, "%u%c", &cpu, &sep);
+ if (n <= 0)
+ break;
+ if (prev >= 0) {
+ int new_max = nr_cpus + cpu - prev - 1;
+
+ if (new_max >= max_entries) {
+ max_entries = new_max + MAX_NR_CPUS / 2;
+ tmp = realloc(tmp_cpus, max_entries * sizeof(int));
+ if (tmp == NULL)
+ goto out_free_tmp;
+ tmp_cpus = tmp;
+ }
+
+ while (++prev < cpu)
+ tmp_cpus[nr_cpus++] = prev;
+ }
+ if (nr_cpus == max_entries) {
+ max_entries += MAX_NR_CPUS;
+ tmp = realloc(tmp_cpus, max_entries * sizeof(int));
+ if (tmp == NULL)
+ goto out_free_tmp;
+ tmp_cpus = tmp;
+ }
+
+ tmp_cpus[nr_cpus++] = cpu;
+ if (n == 2 && sep == '-')
+ prev = cpu;
+ else
+ prev = -1;
+ if (n == 1 || sep == '\n')
+ break;
+ }
+
+ if (nr_cpus > 0)
+ cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
+ else
+ cpus = cpu_map__default_new();
+out_free_tmp:
+ free(tmp_cpus);
+ return cpus;
+}
+
+static struct perf_cpu_map *cpu_map__read_all_cpu_map(void)
+{
+ struct perf_cpu_map *cpus = NULL;
+ FILE *onlnf;
+
+ onlnf = fopen("/sys/devices/system/cpu/online", "r");
+ if (!onlnf)
+ return cpu_map__default_new();
+
+ cpus = perf_cpu_map__read(onlnf);
+ fclose(onlnf);
+ return cpus;
+}
+
+struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
+{
+ struct perf_cpu_map *cpus = NULL;
+ unsigned long start_cpu, end_cpu = 0;
+ char *p = NULL;
+ int i, nr_cpus = 0;
+ int *tmp_cpus = NULL, *tmp;
+ int max_entries = 0;
+
+ if (!cpu_list)
+ return cpu_map__read_all_cpu_map();
+
+ /*
+ * must handle the case of empty cpumap to cover
+ * TOPOLOGY header for NUMA nodes with no CPU
+ * ( e.g., because of CPU hotplug)
+ */
+ if (!isdigit(*cpu_list) && *cpu_list != '\0')
+ goto out;
+
+ while (isdigit(*cpu_list)) {
+ p = NULL;
+ start_cpu = strtoul(cpu_list, &p, 0);
+ if (start_cpu >= INT_MAX
+ || (*p != '\0' && *p != ',' && *p != '-'))
+ goto invalid;
+
+ if (*p == '-') {
+ cpu_list = ++p;
+ p = NULL;
+ end_cpu = strtoul(cpu_list, &p, 0);
+
+ if (end_cpu >= INT_MAX || (*p != '\0' && *p != ','))
+ goto invalid;
+
+ if (end_cpu < start_cpu)
+ goto invalid;
+ } else {
+ end_cpu = start_cpu;
+ }
+
+ for (; start_cpu <= end_cpu; start_cpu++) {
+ /* check for duplicates */
+ for (i = 0; i < nr_cpus; i++)
+ if (tmp_cpus[i] == (int)start_cpu)
+ goto invalid;
+
+ if (nr_cpus == max_entries) {
+ max_entries += MAX_NR_CPUS;
+ tmp = realloc(tmp_cpus, max_entries * sizeof(int));
+ if (tmp == NULL)
+ goto invalid;
+ tmp_cpus = tmp;
+ }
+ tmp_cpus[nr_cpus++] = (int)start_cpu;
+ }
+ if (*p)
+ ++p;
+
+ cpu_list = p;
+ }
+
+ if (nr_cpus > 0)
+ cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
+ else if (*cpu_list != '\0')
+ cpus = cpu_map__default_new();
+ else
+ cpus = perf_cpu_map__dummy_new();
+invalid:
+ free(tmp_cpus);
+out:
+ return cpus;
+}
diff --git a/tools/perf/lib/include/internal/cpumap.h b/tools/perf/lib/include/internal/cpumap.h
index 53ce95374b05..3306319f7df8 100644
--- a/tools/perf/lib/include/internal/cpumap.h
+++ b/tools/perf/lib/include/internal/cpumap.h
@@ -10,4 +10,8 @@ struct perf_cpu_map {
int map[];
};

+#ifndef MAX_NR_CPUS
+#define MAX_NR_CPUS 2048
+#endif
+
#endif /* __LIBPERF_INTERNAL_CPUMAP_H */
diff --git a/tools/perf/lib/include/perf/cpumap.h b/tools/perf/lib/include/perf/cpumap.h
index e16c2515a499..b4a9283a5dfa 100644
--- a/tools/perf/lib/include/perf/cpumap.h
+++ b/tools/perf/lib/include/perf/cpumap.h
@@ -3,10 +3,13 @@
#define __LIBPERF_CPUMAP_H

#include <perf/core.h>
+#include <stdio.h>

struct perf_cpu_map;

LIBPERF_API struct perf_cpu_map *perf_cpu_map__dummy_new(void);
+LIBPERF_API struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list);
+LIBPERF_API struct perf_cpu_map *perf_cpu_map__read(FILE *file);
LIBPERF_API struct perf_cpu_map *perf_cpu_map__get(struct perf_cpu_map *map);
LIBPERF_API void perf_cpu_map__put(struct perf_cpu_map *map);

diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 168339f89a2e..e38473a8f32f 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -4,6 +4,8 @@ LIBPERF_0.0.1 {
perf_cpu_map__dummy_new;
perf_cpu_map__get;
perf_cpu_map__put;
+ perf_cpu_map__new;
+ perf_cpu_map__read;
perf_thread_map__new_dummy;
perf_thread_map__set_pid;
perf_thread_map__comm;
diff --git a/tools/perf/tests/bitmap.c b/tools/perf/tests/bitmap.c
index 95304d29092e..db2aadff3708 100644
--- a/tools/perf/tests/bitmap.c
+++ b/tools/perf/tests/bitmap.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <linux/bitmap.h>
+#include <perf/cpumap.h>
#include "tests.h"
#include "cpumap.h"
#include "debug.h"
@@ -9,7 +10,7 @@

static unsigned long *get_bitmap(const char *str, int nbits)
{
- struct perf_cpu_map *map = cpu_map__new(str);
+ struct perf_cpu_map *map = perf_cpu_map__new(str);
unsigned long *bm = NULL;
int i;

diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 131bbeec62d2..bfaf22c2023c 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -8,6 +8,7 @@
#include <stdio.h>
#include <string.h>
#include <sys/param.h>
+#include <perf/cpumap.h>

#include "parse-events.h"
#include "evlist.h"
@@ -613,9 +614,9 @@ static int do_test_code_reading(bool try_kcore)
goto out_put;
}

- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
if (!cpus) {
- pr_debug("cpu_map__new failed\n");
+ pr_debug("perf_cpu_map__new failed\n");
goto out_put;
}

diff --git a/tools/perf/tests/cpumap.c b/tools/perf/tests/cpumap.c
index 6c921087b0fe..b71fe09a8087 100644
--- a/tools/perf/tests/cpumap.c
+++ b/tools/perf/tests/cpumap.c
@@ -5,6 +5,7 @@
#include "event.h"
#include <string.h>
#include <linux/bitops.h>
+#include <perf/cpumap.h>
#include "debug.h"

struct machine;
@@ -78,7 +79,7 @@ int test__cpu_map_synthesize(struct test *test __maybe_unused, int subtest __may
struct perf_cpu_map *cpus;

/* This one is better stores in mask. */
- cpus = cpu_map__new("0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19");
+ cpus = perf_cpu_map__new("0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19");

TEST_ASSERT_VAL("failed to synthesize map",
!perf_event__synthesize_cpu_map(NULL, cpus, process_event_mask, NULL));
@@ -86,7 +87,7 @@ int test__cpu_map_synthesize(struct test *test __maybe_unused, int subtest __may
perf_cpu_map__put(cpus);

/* This one is better stores in cpu values. */
- cpus = cpu_map__new("1,256");
+ cpus = perf_cpu_map__new("1,256");

TEST_ASSERT_VAL("failed to synthesize map",
!perf_event__synthesize_cpu_map(NULL, cpus, process_event_cpus, NULL));
@@ -97,7 +98,7 @@ int test__cpu_map_synthesize(struct test *test __maybe_unused, int subtest __may

static int cpu_map_print(const char *str)
{
- struct perf_cpu_map *map = cpu_map__new(str);
+ struct perf_cpu_map *map = perf_cpu_map__new(str);
char buf[100];

if (!map)
diff --git a/tools/perf/tests/event-times.c b/tools/perf/tests/event-times.c
index 165534f62036..00adba86403b 100644
--- a/tools/perf/tests/event-times.c
+++ b/tools/perf/tests/event-times.c
@@ -4,6 +4,7 @@
#include <inttypes.h>
#include <string.h>
#include <sys/wait.h>
+#include <perf/cpumap.h>
#include "tests.h"
#include "evlist.h"
#include "evsel.h"
@@ -115,9 +116,9 @@ static int attach__cpu_disabled(struct evlist *evlist)

pr_debug("attaching to CPU 0 as enabled\n");

- cpus = cpu_map__new("0");
+ cpus = perf_cpu_map__new("0");
if (cpus == NULL) {
- pr_debug("failed to call cpu_map__new\n");
+ pr_debug("failed to call perf_cpu_map__new\n");
return -1;
}

@@ -144,9 +145,9 @@ static int attach__cpu_enabled(struct evlist *evlist)

pr_debug("attaching to CPU 0 as enabled\n");

- cpus = cpu_map__new("0");
+ cpus = perf_cpu_map__new("0");
if (cpus == NULL) {
- pr_debug("failed to call cpu_map__new\n");
+ pr_debug("failed to call perf_cpu_map__new\n");
return -1;
}

diff --git a/tools/perf/tests/event_update.c b/tools/perf/tests/event_update.c
index 415d12e96834..2bc5145284c0 100644
--- a/tools/perf/tests/event_update.c
+++ b/tools/perf/tests/event_update.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
+#include <perf/cpumap.h>
#include "evlist.h"
#include "evsel.h"
#include "machine.h"
@@ -108,7 +109,7 @@ int test__event_update(struct test *test __maybe_unused, int subtest __maybe_unu
TEST_ASSERT_VAL("failed to synthesize attr update name",
!perf_event__synthesize_event_update_name(&tmp.tool, evsel, process_event_name));

- evsel->own_cpus = cpu_map__new("1,2,3");
+ evsel->own_cpus = perf_cpu_map__new("1,2,3");

TEST_ASSERT_VAL("failed to synthesize attr update cpus",
!perf_event__synthesize_event_update_cpus(&tmp.tool, evsel, process_event_cpus));
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 4fc7b3b4e153..46478ba1ed16 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -2,6 +2,7 @@
#include <linux/types.h>
#include <unistd.h>
#include <sys/prctl.h>
+#include <perf/cpumap.h>

#include "parse-events.h"
#include "evlist.h"
@@ -75,7 +76,7 @@ int test__keep_tracking(struct test *test __maybe_unused, int subtest __maybe_un
threads = thread_map__new(-1, getpid(), UINT_MAX);
CHECK_NOT_NULL__(threads);

- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
CHECK_NOT_NULL__(cpus);

evlist = evlist__new();
diff --git a/tools/perf/tests/mem2node.c b/tools/perf/tests/mem2node.c
index 6fe2c1e7918b..5ec193f7968d 100644
--- a/tools/perf/tests/mem2node.c
+++ b/tools/perf/tests/mem2node.c
@@ -2,6 +2,7 @@
#include <linux/compiler.h>
#include <linux/bitmap.h>
#include <linux/zalloc.h>
+#include <perf/cpumap.h>
#include "cpumap.h"
#include "mem2node.h"
#include "tests.h"
@@ -19,7 +20,7 @@ static struct node {

static unsigned long *get_bitmap(const char *str, int nbits)
{
- struct perf_cpu_map *map = cpu_map__new(str);
+ struct perf_cpu_map *map = perf_cpu_map__new(str);
unsigned long *bm = NULL;
int i;

diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index 9d8eb43b12cb..aa792aebd7f0 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -3,6 +3,7 @@
#include <inttypes.h>
/* For the CLR_() macros */
#include <pthread.h>
+#include <perf/cpumap.h>

#include "evlist.h"
#include "evsel.h"
@@ -46,7 +47,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
return -1;
}

- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
if (cpus == NULL) {
pr_debug("cpu_map__new\n");
goto out_free_threads;
diff --git a/tools/perf/tests/openat-syscall-all-cpus.c b/tools/perf/tests/openat-syscall-all-cpus.c
index 674b0fa035ec..d161b1a78703 100644
--- a/tools/perf/tests/openat-syscall-all-cpus.c
+++ b/tools/perf/tests/openat-syscall-all-cpus.c
@@ -33,7 +33,7 @@ int test__openat_syscall_event_on_all_cpus(struct test *test __maybe_unused, int
return -1;
}

- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
if (cpus == NULL) {
pr_debug("cpu_map__new\n");
goto out_thread_map_delete;
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index dd07acced4af..9e0bbea15005 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -5,6 +5,7 @@
#include <time.h>
#include <stdlib.h>
#include <linux/zalloc.h>
+#include <perf/cpumap.h>

#include "parse-events.h"
#include "evlist.h"
@@ -341,9 +342,9 @@ int test__switch_tracking(struct test *test __maybe_unused, int subtest __maybe_
goto out_err;
}

- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
if (!cpus) {
- pr_debug("cpu_map__new failed!\n");
+ pr_debug("perf_cpu_map__new failed!\n");
goto out_err;
}

diff --git a/tools/perf/tests/topology.c b/tools/perf/tests/topology.c
index 1b57ded58d59..a4f9f5182b47 100644
--- a/tools/perf/tests/topology.c
+++ b/tools/perf/tests/topology.c
@@ -2,6 +2,7 @@
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
+#include <perf/cpumap.h>
#include "tests.h"
#include "util.h"
#include "session.h"
@@ -126,7 +127,7 @@ int test__session_topology(struct test *test __maybe_unused, int subtest __maybe
if (session_write_header(path))
goto free_path;

- map = cpu_map__new(NULL);
+ map = perf_cpu_map__new(NULL);
if (map == NULL) {
pr_debug("failed to get system cpumap\n");
goto free_path;
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index 44082e5eabde..71d4d7b35a57 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -17,185 +17,6 @@ static int max_present_cpu_num;
static int max_node_num;
static int *cpunode_map;

-static struct perf_cpu_map *cpu_map__default_new(void)
-{
- struct perf_cpu_map *cpus;
- int nr_cpus;
-
- nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
- if (nr_cpus < 0)
- return NULL;
-
- cpus = malloc(sizeof(*cpus) + nr_cpus * sizeof(int));
- if (cpus != NULL) {
- int i;
- for (i = 0; i < nr_cpus; ++i)
- cpus->map[i] = i;
-
- cpus->nr = nr_cpus;
- refcount_set(&cpus->refcnt, 1);
- }
-
- return cpus;
-}
-
-static struct perf_cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus)
-{
- size_t payload_size = nr_cpus * sizeof(int);
- struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + payload_size);
-
- if (cpus != NULL) {
- cpus->nr = nr_cpus;
- memcpy(cpus->map, tmp_cpus, payload_size);
- refcount_set(&cpus->refcnt, 1);
- }
-
- return cpus;
-}
-
-struct perf_cpu_map *cpu_map__read(FILE *file)
-{
- struct perf_cpu_map *cpus = NULL;
- int nr_cpus = 0;
- int *tmp_cpus = NULL, *tmp;
- int max_entries = 0;
- int n, cpu, prev;
- char sep;
-
- sep = 0;
- prev = -1;
- for (;;) {
- n = fscanf(file, "%u%c", &cpu, &sep);
- if (n <= 0)
- break;
- if (prev >= 0) {
- int new_max = nr_cpus + cpu - prev - 1;
-
- if (new_max >= max_entries) {
- max_entries = new_max + MAX_NR_CPUS / 2;
- tmp = realloc(tmp_cpus, max_entries * sizeof(int));
- if (tmp == NULL)
- goto out_free_tmp;
- tmp_cpus = tmp;
- }
-
- while (++prev < cpu)
- tmp_cpus[nr_cpus++] = prev;
- }
- if (nr_cpus == max_entries) {
- max_entries += MAX_NR_CPUS;
- tmp = realloc(tmp_cpus, max_entries * sizeof(int));
- if (tmp == NULL)
- goto out_free_tmp;
- tmp_cpus = tmp;
- }
-
- tmp_cpus[nr_cpus++] = cpu;
- if (n == 2 && sep == '-')
- prev = cpu;
- else
- prev = -1;
- if (n == 1 || sep == '\n')
- break;
- }
-
- if (nr_cpus > 0)
- cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
- else
- cpus = cpu_map__default_new();
-out_free_tmp:
- free(tmp_cpus);
- return cpus;
-}
-
-static struct perf_cpu_map *cpu_map__read_all_cpu_map(void)
-{
- struct perf_cpu_map *cpus = NULL;
- FILE *onlnf;
-
- onlnf = fopen("/sys/devices/system/cpu/online", "r");
- if (!onlnf)
- return cpu_map__default_new();
-
- cpus = cpu_map__read(onlnf);
- fclose(onlnf);
- return cpus;
-}
-
-struct perf_cpu_map *cpu_map__new(const char *cpu_list)
-{
- struct perf_cpu_map *cpus = NULL;
- unsigned long start_cpu, end_cpu = 0;
- char *p = NULL;
- int i, nr_cpus = 0;
- int *tmp_cpus = NULL, *tmp;
- int max_entries = 0;
-
- if (!cpu_list)
- return cpu_map__read_all_cpu_map();
-
- /*
- * must handle the case of empty cpumap to cover
- * TOPOLOGY header for NUMA nodes with no CPU
- * ( e.g., because of CPU hotplug)
- */
- if (!isdigit(*cpu_list) && *cpu_list != '\0')
- goto out;
-
- while (isdigit(*cpu_list)) {
- p = NULL;
- start_cpu = strtoul(cpu_list, &p, 0);
- if (start_cpu >= INT_MAX
- || (*p != '\0' && *p != ',' && *p != '-'))
- goto invalid;
-
- if (*p == '-') {
- cpu_list = ++p;
- p = NULL;
- end_cpu = strtoul(cpu_list, &p, 0);
-
- if (end_cpu >= INT_MAX || (*p != '\0' && *p != ','))
- goto invalid;
-
- if (end_cpu < start_cpu)
- goto invalid;
- } else {
- end_cpu = start_cpu;
- }
-
- for (; start_cpu <= end_cpu; start_cpu++) {
- /* check for duplicates */
- for (i = 0; i < nr_cpus; i++)
- if (tmp_cpus[i] == (int)start_cpu)
- goto invalid;
-
- if (nr_cpus == max_entries) {
- max_entries += MAX_NR_CPUS;
- tmp = realloc(tmp_cpus, max_entries * sizeof(int));
- if (tmp == NULL)
- goto invalid;
- tmp_cpus = tmp;
- }
- tmp_cpus[nr_cpus++] = (int)start_cpu;
- }
- if (*p)
- ++p;
-
- cpu_list = p;
- }
-
- if (nr_cpus > 0)
- cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
- else if (*cpu_list != '\0')
- cpus = cpu_map__default_new();
- else
- cpus = perf_cpu_map__dummy_new();
-invalid:
- free(tmp_cpus);
-out:
- return cpus;
-}
-
static struct perf_cpu_map *cpu_map__from_entries(struct cpu_map_entries *cpus)
{
struct perf_cpu_map *map;
@@ -751,7 +572,7 @@ const struct perf_cpu_map *cpu_map__online(void) /* thread unsafe */
static const struct perf_cpu_map *online = NULL;

if (!online)
- online = cpu_map__new(NULL); /* from /sys/devices/system/cpu/online */
+ online = perf_cpu_map__new(NULL); /* from /sys/devices/system/cpu/online */

return online;
}
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index b7af2cb68c19..a3d27f4131be 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h
@@ -11,10 +11,8 @@
#include "perf.h"
#include "util/debug.h"

-struct perf_cpu_map *cpu_map__new(const char *cpu_list);
struct perf_cpu_map *cpu_map__empty_new(int nr);
struct perf_cpu_map *cpu_map__new_data(struct cpu_map_data *data);
-struct perf_cpu_map *cpu_map__read(FILE *file);
size_t cpu_map__snprint(struct perf_cpu_map *map, char *buf, size_t size);
size_t cpu_map__snprint_mask(struct perf_cpu_map *map, char *buf, size_t size);
size_t cpu_map__fprintf(struct perf_cpu_map *map, FILE *fp);
diff --git a/tools/perf/util/cputopo.c b/tools/perf/util/cputopo.c
index 0cd99c460cd4..4f70155eaf83 100644
--- a/tools/perf/util/cputopo.c
+++ b/tools/perf/util/cputopo.c
@@ -5,6 +5,7 @@
#include <stdlib.h>
#include <api/fs/fs.h>
#include <linux/zalloc.h>
+#include <perf/cpumap.h>

#include "cputopo.h"
#include "cpumap.h"
@@ -182,7 +183,7 @@ struct cpu_topology *cpu_topology__new(void)
ncpus = cpu__max_present_cpu();

/* build online CPU map */
- map = cpu_map__new(NULL);
+ map = perf_cpu_map__new(NULL);
if (map == NULL) {
pr_debug("failed to get system cpumap\n");
return NULL;
@@ -312,7 +313,7 @@ struct numa_topology *numa_topology__new(void)
if (c)
*c = '\0';

- node_map = cpu_map__new(buf);
+ node_map = perf_cpu_map__new(buf);
if (!node_map)
goto out;

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index ae75777a0ba4..67c67e9a38cd 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -34,6 +34,7 @@
#include <linux/err.h>
#include <linux/zalloc.h>
#include <perf/evlist.h>
+#include <perf/cpumap.h>

#ifdef LACKS_SIGQUEUE_PROTOTYPE
int sigqueue(pid_t pid, int sig, const union sigval value);
@@ -1089,7 +1090,7 @@ int perf_evlist__create_maps(struct evlist *evlist, struct target *target)
if (target__uses_dummy_map(target))
cpus = perf_cpu_map__dummy_new();
else
- cpus = cpu_map__new(target->cpu_list);
+ cpus = perf_cpu_map__new(target->cpu_list);

if (!cpus)
goto out_delete_threads;
@@ -1372,7 +1373,7 @@ static int perf_evlist__create_syswide_maps(struct evlist *evlist)
* error, and we may not want to do that fallback to a
* default cpu identity map :-\
*/
- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
if (!cpus)
goto out;

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d81afe56392c..fa914ba8cd56 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -20,6 +20,7 @@
#include <linux/time64.h>
#include <dirent.h>
#include <bpf/libbpf.h>
+#include <perf/cpumap.h>

#include "evlist.h"
#include "evsel.h"
@@ -2348,7 +2349,7 @@ static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
if (!str)
goto error;

- n->map = cpu_map__new(str);
+ n->map = perf_cpu_map__new(str);
if (!n->map)
goto error;

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index ec7ce18b999a..db2460d6b625 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -24,6 +24,7 @@
#include "bpf-loader.h"
#include "debug.h"
#include <api/fs/tracing_path.h>
+#include <perf/cpumap.h>
#include "parse-events-bison.h"
#define YY_EXTRA_TYPE int
#include "parse-events-flex.h"
@@ -323,7 +324,7 @@ __add_event(struct list_head *list, int *idx,
{
struct evsel *evsel;
struct perf_cpu_map *cpus = pmu ? pmu->cpus :
- cpu_list ? cpu_map__new(cpu_list) : NULL;
+ cpu_list ? perf_cpu_map__new(cpu_list) : NULL;

event_attr_init(attr);

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index d355f9506a1c..b7da21a7d627 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -15,6 +15,7 @@
#include <api/fs/fs.h>
#include <locale.h>
#include <regex.h>
+#include <perf/cpumap.h>
#include "pmu.h"
#include "parse-events.h"
#include "cpumap.h"
@@ -581,7 +582,7 @@ static struct perf_cpu_map *__pmu_cpumask(const char *path)
if (!file)
return NULL;

- cpus = cpu_map__read(file);
+ cpus = perf_cpu_map__read(file);
fclose(file);
return cpus;
}
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 23a4fa13b92d..75ecc32a4427 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -4,6 +4,7 @@
#include <inttypes.h>
#include <poll.h>
#include <linux/err.h>
+#include <perf/cpumap.h>
#include "evlist.h"
#include "callchain.h"
#include "evsel.h"
@@ -549,7 +550,7 @@ static int pyrf_cpu_map__init(struct pyrf_cpu_map *pcpus,
kwlist, &cpustr))
return -1;

- pcpus->cpus = cpu_map__new(cpustr);
+ pcpus->cpus = perf_cpu_map__new(cpustr);
if (pcpus->cpus == NULL)
return -1;
return 0;
diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index 445788819969..03dcdb3f33a7 100644
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -6,6 +6,7 @@
#include <errno.h>
#include <api/fs/fs.h>
#include <subcmd/parse-options.h>
+#include <perf/cpumap.h>
#include "util.h"
#include "cloexec.h"

@@ -63,7 +64,7 @@ static bool perf_probe_api(setup_probe_fn_t fn)
struct perf_cpu_map *cpus;
int cpu, ret, i = 0;

- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
if (!cpus)
return false;
cpu = cpus->map[0];
@@ -118,7 +119,7 @@ bool perf_can_record_cpu_wide(void)
struct perf_cpu_map *cpus;
int cpu, fd;

- cpus = cpu_map__new(NULL);
+ cpus = perf_cpu_map__new(NULL);
if (!cpus)
return false;
cpu = cpus->map[0];
@@ -275,7 +276,7 @@ bool perf_evlist__can_select_event(struct evlist *evlist, const char *str)
evsel = perf_evlist__last(temp_evlist);

if (!evlist || cpu_map__empty(evlist->cpus)) {
- struct perf_cpu_map *cpus = cpu_map__new(NULL);
+ struct perf_cpu_map *cpus = perf_cpu_map__new(NULL);

cpu = cpus ? cpus->map[0] : 0;
perf_cpu_map__put(cpus);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 1f3dc7a8cee6..11e6093c941b 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -10,6 +10,7 @@
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
+#include <perf/cpumap.h>

#include "evlist.h"
#include "evsel.h"
@@ -2289,7 +2290,7 @@ int perf_session__cpu_bitmap(struct perf_session *session,
}
}

- map = cpu_map__new(cpu_list);
+ map = perf_cpu_map__new(cpu_list);
if (map == NULL) {
pr_err("Invalid cpu_list\n");
return -1;
diff --git a/tools/perf/util/svghelper.c b/tools/perf/util/svghelper.c
index a9ca5c4fffee..ae6a534a7a80 100644
--- a/tools/perf/util/svghelper.c
+++ b/tools/perf/util/svghelper.c
@@ -16,6 +16,7 @@
#include <linux/bitmap.h>
#include <linux/time64.h>
#include <linux/zalloc.h>
+#include <perf/cpumap.h>

#include "perf.h"
#include "svghelper.h"
@@ -731,7 +732,7 @@ static int str_to_bitmap(char *s, cpumask_t *b)
struct perf_cpu_map *m;
int c;

- m = cpu_map__new(s);
+ m = perf_cpu_map__new(s);
if (!m)
return -1;

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