1 files changed, 670 insertions, 216 deletions

diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index beb8cf9f9976..a80845038a5e 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -1,319 +1,773 @@
-#include "util.h"
-#include "sysfs.h"
-#include "../perf.h"
+// SPDX-License-Identifier: GPL-2.0
+#include <api/fs/fs.h>
 #include "cpumap.h"
+#include "debug.h"
+#include "event.h"
 #include <assert.h>
+#include <dirent.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <linux/bitmap.h>
+#include "asm/bug.h"
+
+#include <linux/ctype.h>
+#include <linux/zalloc.h>
+#include <internal/cpumap.h>
+
+static struct perf_cpu max_cpu_num;
+static struct perf_cpu max_present_cpu_num;
+static int max_node_num;
+/**
+ * The numa node X as read from /sys/devices/system/node/nodeX indexed by the
+ * CPU number.
+ */
+static int *cpunode_map;
+
+bool perf_record_cpu_map_data__test_bit(int i,
+					const struct perf_record_cpu_map_data *data)
+{
+	int bit_word32 = i / 32;
+	__u32 bit_mask32 = 1U << (i & 31);
+	int bit_word64 = i / 64;
+	__u64 bit_mask64 = ((__u64)1) << (i & 63);
+
+	return (data->mask32_data.long_size == 4)
+		? (bit_word32 < data->mask32_data.nr) &&
+		(data->mask32_data.mask[bit_word32] & bit_mask32) != 0
+		: (bit_word64 < data->mask64_data.nr) &&
+		(data->mask64_data.mask[bit_word64] & bit_mask64) != 0;
+}
 
-static struct cpu_map *cpu_map__default_new(void)
+/* Read ith mask value from data into the given 64-bit sized bitmap */
+static void perf_record_cpu_map_data__read_one_mask(const struct perf_record_cpu_map_data *data,
+						    int i, unsigned long *bitmap)
+{
+#if __SIZEOF_LONG__ == 8
+	if (data->mask32_data.long_size == 4)
+		bitmap[0] = data->mask32_data.mask[i];
+	else
+		bitmap[0] = data->mask64_data.mask[i];
+#else
+	if (data->mask32_data.long_size == 4) {
+		bitmap[0] = data->mask32_data.mask[i];
+		bitmap[1] = 0;
+	} else {
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+		bitmap[0] = (unsigned long)(data->mask64_data.mask[i] >> 32);
+		bitmap[1] = (unsigned long)data->mask64_data.mask[i];
+#else
+		bitmap[0] = (unsigned long)data->mask64_data.mask[i];
+		bitmap[1] = (unsigned long)(data->mask64_data.mask[i] >> 32);
+#endif
+	}
+#endif
+}
+static struct perf_cpu_map *cpu_map__from_entries(const struct perf_record_cpu_map_data *data)
 {
-	struct cpu_map *cpus;
-	int nr_cpus;
+	struct perf_cpu_map *map;
 
-	nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
-	if (nr_cpus < 0)
+	map = perf_cpu_map__empty_new(data->cpus_data.nr);
+	if (!map)
 		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;
+	for (unsigned int i = 0; i < data->cpus_data.nr; i++) {
+		/*
+		 * Special treatment for -1, which is not real cpu number,
+		 * and we need to use (int) -1 to initialize map[i],
+		 * otherwise it would become 65535.
+		 */
+		if (data->cpus_data.cpu[i] == (u16) -1) {
+			RC_CHK_ACCESS(map)->map[i].cpu = -1;
+		} else if (data->cpus_data.cpu[i] < INT16_MAX) {
+			RC_CHK_ACCESS(map)->map[i].cpu = (int16_t) data->cpus_data.cpu[i];
+		} else {
+			pr_err("Invalid cpumap entry %u\n", data->cpus_data.cpu[i]);
+			perf_cpu_map__put(map);
+			return NULL;
+		}
 	}
 
-	return cpus;
+	return map;
 }
 
-static struct cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus)
+static struct perf_cpu_map *cpu_map__from_mask(const struct perf_record_cpu_map_data *data)
 {
-	size_t payload_size = nr_cpus * sizeof(int);
-	struct cpu_map *cpus = malloc(sizeof(*cpus) + payload_size);
+	DECLARE_BITMAP(local_copy, 64);
+	int weight = 0, mask_nr = data->mask32_data.nr;
+	struct perf_cpu_map *map;
 
-	if (cpus != NULL) {
-		cpus->nr = nr_cpus;
-		memcpy(cpus->map, tmp_cpus, payload_size);
+	for (int i = 0; i < mask_nr; i++) {
+		perf_record_cpu_map_data__read_one_mask(data, i, local_copy);
+		weight += bitmap_weight(local_copy, 64);
 	}
 
-	return cpus;
+	map = perf_cpu_map__empty_new(weight);
+	if (!map)
+		return NULL;
+
+	for (int i = 0, j = 0; i < mask_nr; i++) {
+		int cpus_per_i = (i * data->mask32_data.long_size  * BITS_PER_BYTE);
+		int cpu;
+
+		perf_record_cpu_map_data__read_one_mask(data, i, local_copy);
+		for_each_set_bit(cpu, local_copy, 64) {
+			if (cpu + cpus_per_i < INT16_MAX) {
+				RC_CHK_ACCESS(map)->map[j++].cpu = cpu + cpus_per_i;
+			} else {
+				pr_err("Invalid cpumap entry %d\n", cpu + cpus_per_i);
+				perf_cpu_map__put(map);
+				return NULL;
+			}
+		}
+	}
+	return map;
+
 }
 
-struct cpu_map *cpu_map__read(FILE *file)
+static struct perf_cpu_map *cpu_map__from_range(const struct perf_record_cpu_map_data *data)
 {
-	struct cpu_map *cpus = NULL;
-	int nr_cpus = 0;
-	int *tmp_cpus = NULL, *tmp;
-	int max_entries = 0;
-	int n, cpu, prev;
-	char sep;
+	struct perf_cpu_map *map;
+	unsigned int i = 0;
 
-	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;
-			}
+	map = perf_cpu_map__empty_new(data->range_cpu_data.end_cpu -
+				data->range_cpu_data.start_cpu + 1 + data->range_cpu_data.any_cpu);
+	if (!map)
+		return NULL;
 
-			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;
+	if (data->range_cpu_data.any_cpu)
+		RC_CHK_ACCESS(map)->map[i++].cpu = -1;
+
+	for (int cpu = data->range_cpu_data.start_cpu; cpu <= data->range_cpu_data.end_cpu;
+	     i++, cpu++) {
+		if (cpu < INT16_MAX) {
+			RC_CHK_ACCESS(map)->map[i].cpu = cpu;
+		} else {
+			pr_err("Invalid cpumap entry %d\n", cpu);
+			perf_cpu_map__put(map);
+			return NULL;
 		}
+	}
 
-		tmp_cpus[nr_cpus++] = cpu;
-		if (n == 2 && sep == '-')
-			prev = cpu;
-		else
-			prev = -1;
-		if (n == 1 || sep == '\n')
-			break;
+	return map;
+}
+
+struct perf_cpu_map *cpu_map__new_data(const struct perf_record_cpu_map_data *data)
+{
+	switch (data->type) {
+	case PERF_CPU_MAP__CPUS:
+		return cpu_map__from_entries(data);
+	case PERF_CPU_MAP__MASK:
+		return cpu_map__from_mask(data);
+	case PERF_CPU_MAP__RANGE_CPUS:
+		return cpu_map__from_range(data);
+	default:
+		pr_err("cpu_map__new_data unknown type %d\n", data->type);
+		return NULL;
+	}
+}
+
+size_t cpu_map__fprintf(struct perf_cpu_map *map, FILE *fp)
+{
+#define BUFSIZE 1024
+	char buf[BUFSIZE];
+
+	cpu_map__snprint(map, buf, sizeof(buf));
+	return fprintf(fp, "%s\n", buf);
+#undef BUFSIZE
+}
+
+struct perf_cpu_map *perf_cpu_map__empty_new(int nr)
+{
+	struct perf_cpu_map *cpus = perf_cpu_map__alloc(nr);
+
+	if (cpus != NULL) {
+		for (int i = 0; i < nr; i++)
+			RC_CHK_ACCESS(cpus)->map[i].cpu = -1;
 	}
 
-	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 cpu_map *cpu_map__read_all_cpu_map(void)
+struct cpu_aggr_map *cpu_aggr_map__empty_new(int nr)
 {
-	struct cpu_map *cpus = NULL;
-	FILE *onlnf;
+	struct cpu_aggr_map *cpus = malloc(sizeof(*cpus) + sizeof(struct aggr_cpu_id) * nr);
+
+	if (cpus != NULL) {
+		int i;
 
-	onlnf = fopen("/sys/devices/system/cpu/online", "r");
-	if (!onlnf)
-		return cpu_map__default_new();
+		cpus->nr = nr;
+		for (i = 0; i < nr; i++)
+			cpus->map[i] = aggr_cpu_id__empty();
+	}
 
-	cpus = cpu_map__read(onlnf);
-	fclose(onlnf);
 	return cpus;
 }
 
-struct cpu_map *cpu_map__new(const char *cpu_list)
+static int cpu__get_topology_int(int cpu, const char *name, int *value)
 {
-	struct 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;
+	char path[PATH_MAX];
 
-	if (!cpu_list)
-		return cpu_map__read_all_cpu_map();
+	snprintf(path, PATH_MAX,
+		"devices/system/cpu/cpu%d/topology/%s", cpu, name);
 
-	if (!isdigit(*cpu_list))
-		goto out;
+	return sysfs__read_int(path, value);
+}
 
-	while (isdigit(*cpu_list)) {
-		p = NULL;
-		start_cpu = strtoul(cpu_list, &p, 0);
-		if (start_cpu >= INT_MAX
-		    || (*p != '\0' && *p != ',' && *p != '-'))
-			goto invalid;
+int cpu__get_socket_id(struct perf_cpu cpu)
+{
+	int value, ret = cpu__get_topology_int(cpu.cpu, "physical_package_id", &value);
+	return ret ?: value;
+}
 
-		if (*p == '-') {
-			cpu_list = ++p;
-			p = NULL;
-			end_cpu = strtoul(cpu_list, &p, 0);
+struct aggr_cpu_id aggr_cpu_id__socket(struct perf_cpu cpu, void *data __maybe_unused)
+{
+	struct aggr_cpu_id id = aggr_cpu_id__empty();
 
-			if (end_cpu >= INT_MAX || (*p != '\0' && *p != ','))
-				goto invalid;
+	id.socket = cpu__get_socket_id(cpu);
+	return id;
+}
 
-			if (end_cpu < start_cpu)
-				goto invalid;
-		} else {
-			end_cpu = start_cpu;
-		}
+static int aggr_cpu_id__cmp(const void *a_pointer, const void *b_pointer)
+{
+	struct aggr_cpu_id *a = (struct aggr_cpu_id *)a_pointer;
+	struct aggr_cpu_id *b = (struct aggr_cpu_id *)b_pointer;
+
+	if (a->node != b->node)
+		return a->node - b->node;
+	else if (a->socket != b->socket)
+		return a->socket - b->socket;
+	else if (a->die != b->die)
+		return a->die - b->die;
+	else if (a->cluster != b->cluster)
+		return a->cluster - b->cluster;
+	else if (a->cache_lvl != b->cache_lvl)
+		return a->cache_lvl - b->cache_lvl;
+	else if (a->cache != b->cache)
+		return a->cache - b->cache;
+	else if (a->core != b->core)
+		return a->core - b->core;
+	else
+		return a->thread_idx - b->thread_idx;
+}
+
+struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
+				       aggr_cpu_id_get_t get_id,
+				       void *data, bool needs_sort)
+{
+	int idx;
+	struct perf_cpu cpu;
+	struct cpu_aggr_map *c = cpu_aggr_map__empty_new(perf_cpu_map__nr(cpus));
+
+	if (!c)
+		return NULL;
+
+	/* Reset size as it may only be partially filled */
+	c->nr = 0;
+
+	perf_cpu_map__for_each_cpu(cpu, idx, cpus) {
+		bool duplicate = false;
+		struct aggr_cpu_id cpu_id = get_id(cpu, data);
 
-		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;
+		for (int j = 0; j < c->nr; j++) {
+			if (aggr_cpu_id__equal(&cpu_id, &c->map[j])) {
+				duplicate = true;
+				break;
 			}
-			tmp_cpus[nr_cpus++] = (int)start_cpu;
 		}
-		if (*p)
-			++p;
-
-		cpu_list = p;
+		if (!duplicate) {
+			c->map[c->nr] = cpu_id;
+			c->nr++;
+		}
+	}
+	/* Trim. */
+	if (c->nr != perf_cpu_map__nr(cpus)) {
+		struct cpu_aggr_map *trimmed_c =
+			realloc(c,
+				sizeof(struct cpu_aggr_map) + sizeof(struct aggr_cpu_id) * c->nr);
+
+		if (trimmed_c)
+			c = trimmed_c;
 	}
 
-	if (nr_cpus > 0)
-		cpus = cpu_map__trim_new(nr_cpus, tmp_cpus);
-	else
-		cpus = cpu_map__default_new();
-invalid:
-	free(tmp_cpus);
-out:
-	return cpus;
+	/* ensure we process id in increasing order */
+	if (needs_sort)
+		qsort(c->map, c->nr, sizeof(struct aggr_cpu_id), aggr_cpu_id__cmp);
+
+	return c;
+
 }
 
-size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp)
+int cpu__get_die_id(struct perf_cpu cpu)
 {
-	int i;
-	size_t printed = fprintf(fp, "%d cpu%s: ",
-				 map->nr, map->nr > 1 ? "s" : "");
-	for (i = 0; i < map->nr; ++i)
-		printed += fprintf(fp, "%s%d", i ? ", " : "", map->map[i]);
+	int value, ret = cpu__get_topology_int(cpu.cpu, "die_id", &value);
 
-	return printed + fprintf(fp, "\n");
+	return ret ?: value;
 }
 
-struct cpu_map *cpu_map__dummy_new(void)
+struct aggr_cpu_id aggr_cpu_id__die(struct perf_cpu cpu, void *data)
 {
-	struct cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int));
+	struct aggr_cpu_id id;
+	int die;
 
-	if (cpus != NULL) {
-		cpus->nr = 1;
-		cpus->map[0] = -1;
-	}
+	die = cpu__get_die_id(cpu);
+	/* There is no die_id on legacy system. */
+	if (die < 0)
+		die = 0;
 
-	return cpus;
+	/*
+	 * die_id is relative to socket, so start
+	 * with the socket ID and then add die to
+	 * make a unique ID.
+	 */
+	id = aggr_cpu_id__socket(cpu, data);
+	if (aggr_cpu_id__is_empty(&id))
+		return id;
+
+	id.die = die;
+	return id;
 }
 
-void cpu_map__delete(struct cpu_map *map)
+int cpu__get_cluster_id(struct perf_cpu cpu)
 {
-	free(map);
+	int value, ret = cpu__get_topology_int(cpu.cpu, "cluster_id", &value);
+
+	return ret ?: value;
 }
 
-int cpu_map__get_socket(struct cpu_map *map, int idx)
+struct aggr_cpu_id aggr_cpu_id__cluster(struct perf_cpu cpu, void *data)
 {
-	FILE *fp;
-	const char *mnt;
-	char path[PATH_MAX];
-	int cpu, ret;
+	int cluster = cpu__get_cluster_id(cpu);
+	struct aggr_cpu_id id;
 
-	if (idx > map->nr)
-		return -1;
+	/* There is no cluster_id on legacy system. */
+	if (cluster < 0)
+		cluster = 0;
 
-	cpu = map->map[idx];
+	id = aggr_cpu_id__die(cpu, data);
+	if (aggr_cpu_id__is_empty(&id))
+		return id;
 
-	mnt = sysfs_find_mountpoint();
-	if (!mnt)
-		return -1;
+	id.cluster = cluster;
+	return id;
+}
 
-	snprintf(path, PATH_MAX,
-		"%s/devices/system/cpu/cpu%d/topology/physical_package_id",
-		mnt, cpu);
+int cpu__get_core_id(struct perf_cpu cpu)
+{
+	int value, ret = cpu__get_topology_int(cpu.cpu, "core_id", &value);
+	return ret ?: value;
+}
+
+struct aggr_cpu_id aggr_cpu_id__core(struct perf_cpu cpu, void *data)
+{
+	struct aggr_cpu_id id;
+	int core = cpu__get_core_id(cpu);
+
+	/* aggr_cpu_id__die returns a struct with socket die, and cluster set. */
+	id = aggr_cpu_id__cluster(cpu, data);
+	if (aggr_cpu_id__is_empty(&id))
+		return id;
+
+	/*
+	 * core_id is relative to socket and die, we need a global id.
+	 * So we combine the result from cpu_map__get_die with the core id
+	 */
+	id.core = core;
+	return id;
+
+}
+
+struct aggr_cpu_id aggr_cpu_id__cpu(struct perf_cpu cpu, void *data)
+{
+	struct aggr_cpu_id id;
+
+	/* aggr_cpu_id__core returns a struct with socket, die and core set. */
+	id = aggr_cpu_id__core(cpu, data);
+	if (aggr_cpu_id__is_empty(&id))
+		return id;
+
+	id.cpu = cpu;
+	return id;
 
-	fp = fopen(path, "r");
-	if (!fp)
-		return -1;
-	ret = fscanf(fp, "%d", &cpu);
-	fclose(fp);
-	return ret == 1 ? cpu : -1;
 }
 
-static int cmp_ids(const void *a, const void *b)
+struct aggr_cpu_id aggr_cpu_id__node(struct perf_cpu cpu, void *data __maybe_unused)
 {
-	return *(int *)a - *(int *)b;
+	struct aggr_cpu_id id = aggr_cpu_id__empty();
+
+	id.node = cpu__get_node(cpu);
+	return id;
 }
 
-static int cpu_map__build_map(struct cpu_map *cpus, struct cpu_map **res,
-			      int (*f)(struct cpu_map *map, int cpu))
+struct aggr_cpu_id aggr_cpu_id__global(struct perf_cpu cpu, void *data __maybe_unused)
 {
-	struct cpu_map *c;
-	int nr = cpus->nr;
-	int cpu, s1, s2;
+	struct aggr_cpu_id id = aggr_cpu_id__empty();
 
-	/* allocate as much as possible */
-	c = calloc(1, sizeof(*c) + nr * sizeof(int));
-	if (!c)
+	/* it always aggregates to the cpu 0 */
+	cpu.cpu = 0;
+	id.cpu = cpu;
+	return id;
+}
+
+/* setup simple routines to easily access node numbers given a cpu number */
+static int get_max_num(char *path, int *max)
+{
+	size_t num;
+	char *buf;
+	int err = 0;
+
+	if (filename__read_str(path, &buf, &num))
 		return -1;
 
-	for (cpu = 0; cpu < nr; cpu++) {
-		s1 = f(cpus, cpu);
-		for (s2 = 0; s2 < c->nr; s2++) {
-			if (s1 == c->map[s2])
-				break;
-		}
-		if (s2 == c->nr) {
-			c->map[c->nr] = s1;
-			c->nr++;
+	buf[num] = '\0';
+
+	/* start on the right, to find highest node num */
+	while (--num) {
+		if ((buf[num] == ',') || (buf[num] == '-')) {
+			num++;
+			break;
 		}
 	}
-	/* ensure we process id in increasing order */
-	qsort(c->map, c->nr, sizeof(int), cmp_ids);
+	if (sscanf(&buf[num], "%d", max) < 1) {
+		err = -1;
+		goto out;
+	}
 
-	*res = c;
-	return 0;
+	/* convert from 0-based to 1-based */
+	(*max)++;
+
+out:
+	free(buf);
+	return err;
 }
 
-int cpu_map__get_core(struct cpu_map *map, int idx)
+/* Determine highest possible cpu in the system for sparse allocation */
+static void set_max_cpu_num(void)
 {
-	FILE *fp;
 	const char *mnt;
 	char path[PATH_MAX];
-	int cpu, ret, s;
+	int max, ret = -1;
 
-	if (idx > map->nr)
-		return -1;
+	/* set up default */
+	max_cpu_num.cpu = 4096;
+	max_present_cpu_num.cpu = 4096;
+
+	mnt = sysfs__mountpoint();
+	if (!mnt)
+		goto out;
+
+	/* get the highest possible cpu number for a sparse allocation */
+	ret = snprintf(path, PATH_MAX, "%s/devices/system/cpu/possible", mnt);
+	if (ret >= PATH_MAX) {
+		pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
+		goto out;
+	}
+
+	ret = get_max_num(path, &max);
+	if (ret)
+		goto out;
 
-	cpu = map->map[idx];
+	max_cpu_num.cpu = max;
 
-	mnt = sysfs_find_mountpoint();
+	/* get the highest present cpu number for a sparse allocation */
+	ret = snprintf(path, PATH_MAX, "%s/devices/system/cpu/present", mnt);
+	if (ret >= PATH_MAX) {
+		pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
+		goto out;
+	}
+
+	ret = get_max_num(path, &max);
+
+	if (!ret && max > INT16_MAX) {
+		pr_err("Read out of bounds max cpus of %d\n", max);
+		ret = -1;
+	}
+	if (!ret)
+		max_present_cpu_num.cpu = (int16_t)max;
+out:
+	if (ret)
+		pr_err("Failed to read max cpus, using default of %d\n", max_cpu_num.cpu);
+}
+
+/* Determine highest possible node in the system for sparse allocation */
+static void set_max_node_num(void)
+{
+	const char *mnt;
+	char path[PATH_MAX];
+	int ret = -1;
+
+	/* set up default */
+	max_node_num = 8;
+
+	mnt = sysfs__mountpoint();
 	if (!mnt)
+		goto out;
+
+	/* get the highest possible cpu number for a sparse allocation */
+	ret = snprintf(path, PATH_MAX, "%s/devices/system/node/possible", mnt);
+	if (ret >= PATH_MAX) {
+		pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
+		goto out;
+	}
+
+	ret = get_max_num(path, &max_node_num);
+
+out:
+	if (ret)
+		pr_err("Failed to read max nodes, using default of %d\n", max_node_num);
+}
+
+int cpu__max_node(void)
+{
+	if (unlikely(!max_node_num))
+		set_max_node_num();
+
+	return max_node_num;
+}
+
+struct perf_cpu cpu__max_cpu(void)
+{
+	if (unlikely(!max_cpu_num.cpu))
+		set_max_cpu_num();
+
+	return max_cpu_num;
+}
+
+struct perf_cpu cpu__max_present_cpu(void)
+{
+	if (unlikely(!max_present_cpu_num.cpu))
+		set_max_cpu_num();
+
+	return max_present_cpu_num;
+}
+
+
+int cpu__get_node(struct perf_cpu cpu)
+{
+	if (unlikely(cpunode_map == NULL)) {
+		pr_debug("cpu_map not initialized\n");
 		return -1;
+	}
 
-	snprintf(path, PATH_MAX,
-		"%s/devices/system/cpu/cpu%d/topology/core_id",
-		mnt, cpu);
+	return cpunode_map[cpu.cpu];
+}
+
+static int init_cpunode_map(void)
+{
+	int i;
 
-	fp = fopen(path, "r");
-	if (!fp)
+	set_max_cpu_num();
+	set_max_node_num();
+
+	cpunode_map = calloc(max_cpu_num.cpu, sizeof(int));
+	if (!cpunode_map) {
+		pr_err("%s: calloc failed\n", __func__);
 		return -1;
-	ret = fscanf(fp, "%d", &cpu);
-	fclose(fp);
-	if (ret != 1)
+	}
+
+	for (i = 0; i < max_cpu_num.cpu; i++)
+		cpunode_map[i] = -1;
+
+	return 0;
+}
+
+int cpu__setup_cpunode_map(void)
+{
+	struct dirent *dent1, *dent2;
+	DIR *dir1, *dir2;
+	unsigned int cpu, mem;
+	char buf[PATH_MAX];
+	char path[PATH_MAX];
+	const char *mnt;
+	int n;
+
+	/* initialize globals */
+	if (init_cpunode_map())
 		return -1;
 
-	s = cpu_map__get_socket(map, idx);
-	if (s == -1)
+	mnt = sysfs__mountpoint();
+	if (!mnt)
+		return 0;
+
+	n = snprintf(path, PATH_MAX, "%s/devices/system/node", mnt);
+	if (n >= PATH_MAX) {
+		pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
 		return -1;
+	}
 
-	/*
-	 * encode socket in upper 16 bits
-	 * core_id is relative to socket, and
-	 * we need a global id. So we combine
-	 * socket+ core id
-	 */
-	return (s << 16) | (cpu & 0xffff);
+	dir1 = opendir(path);
+	if (!dir1)
+		return 0;
+
+	/* walk tree and setup map */
+	while ((dent1 = readdir(dir1)) != NULL) {
+		if (dent1->d_type != DT_DIR || sscanf(dent1->d_name, "node%u", &mem) < 1)
+			continue;
+
+		n = snprintf(buf, PATH_MAX, "%s/%s", path, dent1->d_name);
+		if (n >= PATH_MAX) {
+			pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX);
+			continue;
+		}
+
+		dir2 = opendir(buf);
+		if (!dir2)
+			continue;
+		while ((dent2 = readdir(dir2)) != NULL) {
+			if (dent2->d_type != DT_LNK || sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
+				continue;
+			cpunode_map[cpu] = mem;
+		}
+		closedir(dir2);
+	}
+	closedir(dir1);
+	return 0;
+}
+
+size_t cpu_map__snprint(struct perf_cpu_map *map, char *buf, size_t size)
+{
+	int i, start = -1;
+	bool first = true;
+	size_t ret = 0;
+
+#define COMMA first ? "" : ","
+
+	for (i = 0; i < perf_cpu_map__nr(map) + 1; i++) {
+		struct perf_cpu cpu = { .cpu = INT16_MAX };
+		bool last = i == perf_cpu_map__nr(map);
+
+		if (!last)
+			cpu = perf_cpu_map__cpu(map, i);
+
+		if (start == -1) {
+			start = i;
+			if (last) {
+				ret += snprintf(buf + ret, size - ret,
+						"%s%d", COMMA,
+						perf_cpu_map__cpu(map, i).cpu);
+			}
+		} else if (((i - start) != (cpu.cpu - perf_cpu_map__cpu(map, start).cpu)) || last) {
+			int end = i - 1;
+
+			if (start == end) {
+				ret += snprintf(buf + ret, size - ret,
+						"%s%d", COMMA,
+						perf_cpu_map__cpu(map, start).cpu);
+			} else {
+				ret += snprintf(buf + ret, size - ret,
+						"%s%d-%d", COMMA,
+						perf_cpu_map__cpu(map, start).cpu, perf_cpu_map__cpu(map, end).cpu);
+			}
+			first = false;
+			start = i;
+		}
+	}
+
+#undef COMMA
+
+	pr_debug2("cpumask list: %s\n", buf);
+	return ret;
+}
+
+static char hex_char(unsigned char val)
+{
+	if (val < 10)
+		return val + '0';
+	if (val < 16)
+		return val - 10 + 'a';
+	return '?';
+}
+
+size_t cpu_map__snprint_mask(struct perf_cpu_map *map, char *buf, size_t size)
+{
+	int idx;
+	char *ptr = buf;
+	unsigned char *bitmap;
+	struct perf_cpu c, last_cpu = perf_cpu_map__max(map);
+
+	if (buf == NULL || size == 0)
+		return 0;
+
+	if (last_cpu.cpu < 0) {
+		buf[0] = '\0';
+		return 0;
+	}
+
+	bitmap = zalloc(last_cpu.cpu / 8 + 1);
+	if (bitmap == NULL) {
+		buf[0] = '\0';
+		return 0;
+	}
+
+	perf_cpu_map__for_each_cpu_skip_any(c, idx, map)
+		bitmap[c.cpu / 8] |= 1 << (c.cpu % 8);
+
+	for (int cpu = last_cpu.cpu / 4 * 4; cpu >= 0; cpu -= 4) {
+		unsigned char bits = bitmap[cpu / 8];
+
+		if (cpu % 8)
+			bits >>= 4;
+		else
+			bits &= 0xf;
+
+		*ptr++ = hex_char(bits);
+		if ((cpu % 32) == 0 && cpu > 0)
+			*ptr++ = ',';
+	}
+	*ptr = '\0';
+	free(bitmap);
+
+	buf[size - 1] = '\0';
+	return ptr - buf;
+}
+
+struct perf_cpu_map *cpu_map__online(void) /* thread unsafe */
+{
+	static struct perf_cpu_map *online;
+
+	if (!online)
+		online = perf_cpu_map__new_online_cpus(); /* from /sys/devices/system/cpu/online */
+
+	return perf_cpu_map__get(online);
+}
+
+bool aggr_cpu_id__equal(const struct aggr_cpu_id *a, const struct aggr_cpu_id *b)
+{
+	return a->thread_idx == b->thread_idx &&
+		a->node == b->node &&
+		a->socket == b->socket &&
+		a->die == b->die &&
+		a->cluster == b->cluster &&
+		a->cache_lvl == b->cache_lvl &&
+		a->cache == b->cache &&
+		a->core == b->core &&
+		a->cpu.cpu == b->cpu.cpu;
 }
 
-int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp)
+bool aggr_cpu_id__is_empty(const struct aggr_cpu_id *a)
 {
-	return cpu_map__build_map(cpus, sockp, cpu_map__get_socket);
+	return a->thread_idx == -1 &&
+		a->node == -1 &&
+		a->socket == -1 &&
+		a->die == -1 &&
+		a->cluster == -1 &&
+		a->cache_lvl == -1 &&
+		a->cache == -1 &&
+		a->core == -1 &&
+		a->cpu.cpu == -1;
 }
 
-int cpu_map__build_core_map(struct cpu_map *cpus, struct cpu_map **corep)
+struct aggr_cpu_id aggr_cpu_id__empty(void)
 {
-	return cpu_map__build_map(cpus, corep, cpu_map__get_core);
+	struct aggr_cpu_id ret = {
+		.thread_idx = -1,
+		.node = -1,
+		.socket = -1,
+		.die = -1,
+		.cluster = -1,
+		.cache_lvl = -1,
+		.cache = -1,
+		.core = -1,
+		.cpu = (struct perf_cpu){ .cpu = -1 },
+	};
+	return ret;
 }