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

@@ -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;

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();

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;
 

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;
 

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;
 

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");
 

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");
 

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");
 

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");
 

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);

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;

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;
+}

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 */

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);
 

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;

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;
 

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;
 	}
 

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)

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;
 	}
 

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));

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();

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;
 

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;

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;

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;
 	}
 

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;

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;
 }

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);

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;
 

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;
 

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;
 

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);
 

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;
 }

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;

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);

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;

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;