Re: [PATCH 43/79] libperf: Add perf_cpu_map__new/perf_cpu_map__read functions

From: Arnaldo Carvalho de Melo
Date: Wed Jul 24 2019 - 11:33:08 EST

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Em Sun, Jul 21, 2019 at 01:24:30PM +0200, Jiri Olsa escreveu:
> Moving following functions:
> cpu_map__new
> cpu_map__read
>
> under libperf with following names:
> perf_cpu_map__new
> perf_cpu_map__read

Fixed up this one:

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

> Link: http://lkml.kernel.org/n/tip-0qht8kirnnrewttpwvh1ntz6@xxxxxxxxxxxxxx
> Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> ---
> 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 +-
> 36 files changed, 262 insertions(+), 224 deletions(-)
>
> 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 882f5b396d63..fb5abd08e366 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 8dc3b9947295..4fcf334470ac 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;
>
> --
> 2.21.0

--

- Arnaldo

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