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-rw-r--r--tools/perf/util/cpumap.c717
1 files changed, 717 insertions, 0 deletions
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
new file mode 100644
index 0000000000..0e090e8bc3
--- /dev/null
+++ b/tools/perf/util/cpumap.c
@@ -0,0 +1,717 @@
+// 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;
+}
+
+/* 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 perf_cpu_map *map;
+
+ map = perf_cpu_map__empty_new(data->cpus_data.nr);
+ if (map) {
+ unsigned i;
+
+ for (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
+ RC_CHK_ACCESS(map)->map[i].cpu = (int) data->cpus_data.cpu[i];
+ }
+ }
+
+ return map;
+}
+
+static struct perf_cpu_map *cpu_map__from_mask(const struct perf_record_cpu_map_data *data)
+{
+ DECLARE_BITMAP(local_copy, 64);
+ int weight = 0, mask_nr = data->mask32_data.nr;
+ struct perf_cpu_map *map;
+
+ 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);
+ }
+
+ 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)
+ RC_CHK_ACCESS(map)->map[j++].cpu = cpu + cpus_per_i;
+ }
+ return map;
+
+}
+
+static struct perf_cpu_map *cpu_map__from_range(const struct perf_record_cpu_map_data *data)
+{
+ struct perf_cpu_map *map;
+ unsigned int i = 0;
+
+ 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;
+
+ 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++)
+ RC_CHK_ACCESS(map)->map[i].cpu = cpu;
+
+ 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;
+ }
+
+ return cpus;
+}
+
+struct cpu_aggr_map *cpu_aggr_map__empty_new(int nr)
+{
+ struct cpu_aggr_map *cpus = malloc(sizeof(*cpus) + sizeof(struct aggr_cpu_id) * nr);
+
+ if (cpus != NULL) {
+ int i;
+
+ cpus->nr = nr;
+ for (i = 0; i < nr; i++)
+ cpus->map[i] = aggr_cpu_id__empty();
+
+ refcount_set(&cpus->refcnt, 1);
+ }
+
+ return cpus;
+}
+
+static int cpu__get_topology_int(int cpu, const char *name, int *value)
+{
+ char path[PATH_MAX];
+
+ snprintf(path, PATH_MAX,
+ "devices/system/cpu/cpu%d/topology/%s", cpu, name);
+
+ return sysfs__read_int(path, value);
+}
+
+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;
+}
+
+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();
+
+ id.socket = cpu__get_socket_id(cpu);
+ return id;
+}
+
+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->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 (int j = 0; j < c->nr; j++) {
+ if (aggr_cpu_id__equal(&cpu_id, &c->map[j])) {
+ duplicate = true;
+ break;
+ }
+ }
+ 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;
+ }
+
+ /* 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;
+
+}
+
+int cpu__get_die_id(struct perf_cpu cpu)
+{
+ int value, ret = cpu__get_topology_int(cpu.cpu, "die_id", &value);
+
+ return ret ?: value;
+}
+
+struct aggr_cpu_id aggr_cpu_id__die(struct perf_cpu cpu, void *data)
+{
+ struct aggr_cpu_id id;
+ int die;
+
+ die = cpu__get_die_id(cpu);
+ /* There is no die_id on legacy system. */
+ if (die == -1)
+ die = 0;
+
+ /*
+ * 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;
+}
+
+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 and die set. */
+ id = aggr_cpu_id__die(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;
+
+}
+
+struct aggr_cpu_id aggr_cpu_id__node(struct perf_cpu cpu, void *data __maybe_unused)
+{
+ struct aggr_cpu_id id = aggr_cpu_id__empty();
+
+ id.node = cpu__get_node(cpu);
+ return id;
+}
+
+struct aggr_cpu_id aggr_cpu_id__global(struct perf_cpu cpu, void *data __maybe_unused)
+{
+ struct aggr_cpu_id id = aggr_cpu_id__empty();
+
+ /* 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;
+
+ buf[num] = '\0';
+
+ /* start on the right, to find highest node num */
+ while (--num) {
+ if ((buf[num] == ',') || (buf[num] == '-')) {
+ num++;
+ break;
+ }
+ }
+ if (sscanf(&buf[num], "%d", max) < 1) {
+ err = -1;
+ goto out;
+ }
+
+ /* convert from 0-based to 1-based */
+ (*max)++;
+
+out:
+ free(buf);
+ return err;
+}
+
+/* Determine highest possible cpu in the system for sparse allocation */
+static void set_max_cpu_num(void)
+{
+ const char *mnt;
+ char path[PATH_MAX];
+ int ret = -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_cpu_num.cpu);
+ if (ret)
+ goto out;
+
+ /* 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_present_cpu_num.cpu);
+
+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;
+ }
+
+ return cpunode_map[cpu.cpu];
+}
+
+static int init_cpunode_map(void)
+{
+ int i;
+
+ 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;
+ }
+
+ 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;
+
+ 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;
+ }
+
+ 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 = INT_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 i, cpu;
+ char *ptr = buf;
+ unsigned char *bitmap;
+ struct perf_cpu last_cpu = perf_cpu_map__cpu(map, perf_cpu_map__nr(map) - 1);
+
+ if (buf == NULL)
+ return 0;
+
+ bitmap = zalloc(last_cpu.cpu / 8 + 1);
+ if (bitmap == NULL) {
+ buf[0] = '\0';
+ return 0;
+ }
+
+ for (i = 0; i < perf_cpu_map__nr(map); i++) {
+ cpu = perf_cpu_map__cpu(map, i).cpu;
+ bitmap[cpu / 8] |= 1 << (cpu % 8);
+ }
+
+ for (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(NULL); /* from /sys/devices/system/cpu/online */
+
+ return 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->cache_lvl == b->cache_lvl &&
+ a->cache == b->cache &&
+ a->core == b->core &&
+ a->cpu.cpu == b->cpu.cpu;
+}
+
+bool aggr_cpu_id__is_empty(const struct aggr_cpu_id *a)
+{
+ return a->thread_idx == -1 &&
+ a->node == -1 &&
+ a->socket == -1 &&
+ a->die == -1 &&
+ a->cache_lvl == -1 &&
+ a->cache == -1 &&
+ a->core == -1 &&
+ a->cpu.cpu == -1;
+}
+
+struct aggr_cpu_id aggr_cpu_id__empty(void)
+{
+ struct aggr_cpu_id ret = {
+ .thread_idx = -1,
+ .node = -1,
+ .socket = -1,
+ .die = -1,
+ .cache_lvl = -1,
+ .cache = -1,
+ .core = -1,
+ .cpu = (struct perf_cpu){ .cpu = -1 },
+ };
+ return ret;
+}