summaryrefslogtreecommitdiff
path: root/tools/perf/lib/cpumap.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/lib/cpumap.c')
-rw-r--r--tools/perf/lib/cpumap.c345
1 files changed, 0 insertions, 345 deletions
diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
deleted file mode 100644
index f93f4e703e4c..000000000000
--- a/tools/perf/lib/cpumap.c
+++ /dev/null
@@ -1,345 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-#include <perf/cpumap.h>
-#include <stdlib.h>
-#include <linux/refcount.h>
-#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)
-{
- struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int));
-
- if (cpus != NULL) {
- cpus->nr = 1;
- cpus->map[0] = -1;
- refcount_set(&cpus->refcnt, 1);
- }
-
- return cpus;
-}
-
-static void cpu_map__delete(struct perf_cpu_map *map)
-{
- if (map) {
- WARN_ONCE(refcount_read(&map->refcnt) != 0,
- "cpu_map refcnt unbalanced\n");
- free(map);
- }
-}
-
-struct perf_cpu_map *perf_cpu_map__get(struct perf_cpu_map *map)
-{
- if (map)
- refcount_inc(&map->refcnt);
- return map;
-}
-
-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 int cmp_int(const void *a, const void *b)
-{
- return *(const int *)a - *(const int*)b;
-}
-
-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);
- int i, j;
-
- if (cpus != NULL) {
- memcpy(cpus->map, tmp_cpus, payload_size);
- qsort(cpus->map, nr_cpus, sizeof(int), cmp_int);
- /* Remove dups */
- j = 0;
- for (i = 0; i < nr_cpus; i++) {
- if (i == 0 || cpus->map[i] != cpus->map[i - 1])
- cpus->map[j++] = cpus->map[i];
- }
- cpus->nr = j;
- assert(j <= nr_cpus);
- 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;
-
- WARN_ONCE(new_max >= MAX_NR_CPUS, "Perf can support %d CPUs. "
- "Consider raising MAX_NR_CPUS\n", MAX_NR_CPUS);
-
- 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;
- }
-
- WARN_ONCE(end_cpu >= MAX_NR_CPUS, "Perf can support %d CPUs. "
- "Consider raising MAX_NR_CPUS\n", MAX_NR_CPUS);
-
- 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;
-}
-
-int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx)
-{
- if (idx < cpus->nr)
- return cpus->map[idx];
-
- return -1;
-}
-
-int perf_cpu_map__nr(const struct perf_cpu_map *cpus)
-{
- return cpus ? cpus->nr : 1;
-}
-
-bool perf_cpu_map__empty(const struct perf_cpu_map *map)
-{
- return map ? map->map[0] == -1 : true;
-}
-
-int perf_cpu_map__idx(struct perf_cpu_map *cpus, int cpu)
-{
- int i;
-
- for (i = 0; i < cpus->nr; ++i) {
- if (cpus->map[i] == cpu)
- return i;
- }
-
- return -1;
-}
-
-int perf_cpu_map__max(struct perf_cpu_map *map)
-{
- int i, max = -1;
-
- for (i = 0; i < map->nr; i++) {
- if (map->map[i] > max)
- max = map->map[i];
- }
-
- return max;
-}
-
-/*
- * Merge two cpumaps
- *
- * orig either gets freed and replaced with a new map, or reused
- * with no reference count change (similar to "realloc")
- * other has its reference count increased.
- */
-
-struct perf_cpu_map *perf_cpu_map__merge(struct perf_cpu_map *orig,
- struct perf_cpu_map *other)
-{
- int *tmp_cpus;
- int tmp_len;
- int i, j, k;
- struct perf_cpu_map *merged;
-
- if (!orig && !other)
- return NULL;
- if (!orig) {
- perf_cpu_map__get(other);
- return other;
- }
- if (!other)
- return orig;
- if (orig->nr == other->nr &&
- !memcmp(orig->map, other->map, orig->nr * sizeof(int)))
- return orig;
-
- tmp_len = orig->nr + other->nr;
- tmp_cpus = malloc(tmp_len * sizeof(int));
- if (!tmp_cpus)
- return NULL;
-
- /* Standard merge algorithm from wikipedia */
- i = j = k = 0;
- while (i < orig->nr && j < other->nr) {
- if (orig->map[i] <= other->map[j]) {
- if (orig->map[i] == other->map[j])
- j++;
- tmp_cpus[k++] = orig->map[i++];
- } else
- tmp_cpus[k++] = other->map[j++];
- }
-
- while (i < orig->nr)
- tmp_cpus[k++] = orig->map[i++];
-
- while (j < other->nr)
- tmp_cpus[k++] = other->map[j++];
- assert(k <= tmp_len);
-
- merged = cpu_map__trim_new(k, tmp_cpus);
- free(tmp_cpus);
- perf_cpu_map__put(orig);
- return merged;
-}