tools/perf/util/env.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "cpumap.h"
   3 #include "debug.h"
   4 #include "env.h"
   5 #include "util/header.h"
   6 #include <linux/ctype.h>
   7 #include <linux/zalloc.h>
   8 #include "bpf-event.h"
   9 #include <errno.h>
  10 #include <sys/utsname.h>
  11 #include <bpf/libbpf.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14
  15 struct perf_env perf_env;
  16
  17 void perf_env__insert_bpf_prog_info(struct perf_env *env,
  18                                     struct bpf_prog_info_node *info_node)
  19 {
  20         __u32 prog_id = info_node->info_linear->info.id;
  21         struct bpf_prog_info_node *node;
  22         struct rb_node *parent = NULL;
  23         struct rb_node **p;
  24
  25         down_write(&env->bpf_progs.lock);
  26         p = &env->bpf_progs.infos.rb_node;
  27
  28         while (*p != NULL) {
  29                 parent = *p;
  30                 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
  31                 if (prog_id < node->info_linear->info.id) {
  32                         p = &(*p)->rb_left;
  33                 } else if (prog_id > node->info_linear->info.id) {
  34                         p = &(*p)->rb_right;
  35                 } else {
  36                         pr_debug("duplicated bpf prog info %u\n", prog_id);
  37                         goto out;
  38                 }
  39         }
  40
  41         rb_link_node(&info_node->rb_node, parent, p);
  42         rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
  43         env->bpf_progs.infos_cnt++;
  44 out:
  45         up_write(&env->bpf_progs.lock);
  46 }
  47
  48 struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
  49                                                         __u32 prog_id)
  50 {
  51         struct bpf_prog_info_node *node = NULL;
  52         struct rb_node *n;
  53
  54         down_read(&env->bpf_progs.lock);
  55         n = env->bpf_progs.infos.rb_node;
  56
  57         while (n) {
  58                 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
  59                 if (prog_id < node->info_linear->info.id)
  60                         n = n->rb_left;
  61                 else if (prog_id > node->info_linear->info.id)
  62                         n = n->rb_right;
  63                 else
  64                         goto out;
  65         }
  66         node = NULL;
  67
  68 out:
  69         up_read(&env->bpf_progs.lock);
  70         return node;
  71 }
  72
  73 void perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
  74 {
  75         struct rb_node *parent = NULL;
  76         __u32 btf_id = btf_node->id;
  77         struct btf_node *node;
  78         struct rb_node **p;
  79
  80         down_write(&env->bpf_progs.lock);
  81         p = &env->bpf_progs.btfs.rb_node;
  82
  83         while (*p != NULL) {
  84                 parent = *p;
  85                 node = rb_entry(parent, struct btf_node, rb_node);
  86                 if (btf_id < node->id) {
  87                         p = &(*p)->rb_left;
  88                 } else if (btf_id > node->id) {
  89                         p = &(*p)->rb_right;
  90                 } else {
  91                         pr_debug("duplicated btf %u\n", btf_id);
  92                         goto out;
  93                 }
  94         }
  95
  96         rb_link_node(&btf_node->rb_node, parent, p);
  97         rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
  98         env->bpf_progs.btfs_cnt++;
  99 out:
 100         up_write(&env->bpf_progs.lock);
 101 }
 102
 103 struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
 104 {
 105         struct btf_node *node = NULL;
 106         struct rb_node *n;
 107
 108         down_read(&env->bpf_progs.lock);
 109         n = env->bpf_progs.btfs.rb_node;
 110
 111         while (n) {
 112                 node = rb_entry(n, struct btf_node, rb_node);
 113                 if (btf_id < node->id)
 114                         n = n->rb_left;
 115                 else if (btf_id > node->id)
 116                         n = n->rb_right;
 117                 else
 118                         goto out;
 119         }
 120         node = NULL;
 121
 122 out:
 123         up_read(&env->bpf_progs.lock);
 124         return node;
 125 }
 126
 127 /* purge data in bpf_progs.infos tree */
 128 static void perf_env__purge_bpf(struct perf_env *env)
 129 {
 130         struct rb_root *root;
 131         struct rb_node *next;
 132
 133         down_write(&env->bpf_progs.lock);
 134
 135         root = &env->bpf_progs.infos;
 136         next = rb_first(root);
 137
 138         while (next) {
 139                 struct bpf_prog_info_node *node;
 140
 141                 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
 142                 next = rb_next(&node->rb_node);
 143                 rb_erase(&node->rb_node, root);
 144                 free(node);
 145         }
 146
 147         env->bpf_progs.infos_cnt = 0;
 148
 149         root = &env->bpf_progs.btfs;
 150         next = rb_first(root);
 151
 152         while (next) {
 153                 struct btf_node *node;
 154
 155                 node = rb_entry(next, struct btf_node, rb_node);
 156                 next = rb_next(&node->rb_node);
 157                 rb_erase(&node->rb_node, root);
 158                 free(node);
 159         }
 160
 161         env->bpf_progs.btfs_cnt = 0;
 162
 163         up_write(&env->bpf_progs.lock);
 164 }
 165
 166 void perf_env__exit(struct perf_env *env)
 167 {
 168         int i;
 169
 170         perf_env__purge_bpf(env);
 171         zfree(&env->hostname);
 172         zfree(&env->os_release);
 173         zfree(&env->version);
 174         zfree(&env->arch);
 175         zfree(&env->cpu_desc);
 176         zfree(&env->cpuid);
 177         zfree(&env->cmdline);
 178         zfree(&env->cmdline_argv);
 179         zfree(&env->sibling_cores);
 180         zfree(&env->sibling_threads);
 181         zfree(&env->pmu_mappings);
 182         zfree(&env->cpu);
 183         zfree(&env->numa_map);
 184
 185         for (i = 0; i < env->nr_numa_nodes; i++)
 186                 perf_cpu_map__put(env->numa_nodes[i].map);
 187         zfree(&env->numa_nodes);
 188
 189         for (i = 0; i < env->caches_cnt; i++)
 190                 cpu_cache_level__free(&env->caches[i]);
 191         zfree(&env->caches);
 192
 193         for (i = 0; i < env->nr_memory_nodes; i++)
 194                 zfree(&env->memory_nodes[i].set);
 195         zfree(&env->memory_nodes);
 196 }
 197
 198 void perf_env__init(struct perf_env *env)
 199 {
 200         env->bpf_progs.infos = RB_ROOT;
 201         env->bpf_progs.btfs = RB_ROOT;
 202         init_rwsem(&env->bpf_progs.lock);
 203 }
 204
 205 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
 206 {
 207         int i;
 208
 209         /* do not include NULL termination */
 210         env->cmdline_argv = calloc(argc, sizeof(char *));
 211         if (env->cmdline_argv == NULL)
 212                 goto out_enomem;
 213
 214         /*
 215          * Must copy argv contents because it gets moved around during option
 216          * parsing:
 217          */
 218         for (i = 0; i < argc ; i++) {
 219                 env->cmdline_argv[i] = argv[i];
 220                 if (env->cmdline_argv[i] == NULL)
 221                         goto out_free;
 222         }
 223
 224         env->nr_cmdline = argc;
 225
 226         return 0;
 227 out_free:
 228         zfree(&env->cmdline_argv);
 229 out_enomem:
 230         return -ENOMEM;
 231 }
 232
 233 int perf_env__read_cpu_topology_map(struct perf_env *env)
 234 {
 235         int cpu, nr_cpus;
 236
 237         if (env->cpu != NULL)
 238                 return 0;
 239
 240         if (env->nr_cpus_avail == 0)
 241                 env->nr_cpus_avail = cpu__max_present_cpu();
 242
 243         nr_cpus = env->nr_cpus_avail;
 244         if (nr_cpus == -1)
 245                 return -EINVAL;
 246
 247         env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
 248         if (env->cpu == NULL)
 249                 return -ENOMEM;
 250
 251         for (cpu = 0; cpu < nr_cpus; ++cpu) {
 252                 env->cpu[cpu].core_id   = cpu_map__get_core_id(cpu);
 253                 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
 254                 env->cpu[cpu].die_id    = cpu_map__get_die_id(cpu);
 255         }
 256
 257         env->nr_cpus_avail = nr_cpus;
 258         return 0;
 259 }
 260
 261 int perf_env__read_cpuid(struct perf_env *env)
 262 {
 263         char cpuid[128];
 264         int err = get_cpuid(cpuid, sizeof(cpuid));
 265
 266         if (err)
 267                 return err;
 268
 269         free(env->cpuid);
 270         env->cpuid = strdup(cpuid);
 271         if (env->cpuid == NULL)
 272                 return ENOMEM;
 273         return 0;
 274 }
 275
 276 static int perf_env__read_arch(struct perf_env *env)
 277 {
 278         struct utsname uts;
 279
 280         if (env->arch)
 281                 return 0;
 282
 283         if (!uname(&uts))
 284                 env->arch = strdup(uts.machine);
 285
 286         return env->arch ? 0 : -ENOMEM;
 287 }
 288
 289 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
 290 {
 291         if (env->nr_cpus_avail == 0)
 292                 env->nr_cpus_avail = cpu__max_present_cpu();
 293
 294         return env->nr_cpus_avail ? 0 : -ENOENT;
 295 }
 296
 297 const char *perf_env__raw_arch(struct perf_env *env)
 298 {
 299         return env && !perf_env__read_arch(env) ? env->arch : "unknown";
 300 }
 301
 302 int perf_env__nr_cpus_avail(struct perf_env *env)
 303 {
 304         return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
 305 }
 306
 307 void cpu_cache_level__free(struct cpu_cache_level *cache)
 308 {
 309         zfree(&cache->type);
 310         zfree(&cache->map);
 311         zfree(&cache->size);
 312 }
 313
 314 /*
 315  * Return architecture name in a normalized form.
 316  * The conversion logic comes from the Makefile.
 317  */
 318 static const char *normalize_arch(char *arch)
 319 {
 320         if (!strcmp(arch, "x86_64"))
 321                 return "x86";
 322         if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
 323                 return "x86";
 324         if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
 325                 return "sparc";
 326         if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
 327                 return "arm64";
 328         if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
 329                 return "arm";
 330         if (!strncmp(arch, "s390", 4))
 331                 return "s390";
 332         if (!strncmp(arch, "parisc", 6))
 333                 return "parisc";
 334         if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
 335                 return "powerpc";
 336         if (!strncmp(arch, "mips", 4))
 337                 return "mips";
 338         if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
 339                 return "sh";
 340
 341         return arch;
 342 }
 343
 344 const char *perf_env__arch(struct perf_env *env)
 345 {
 346         char *arch_name;
 347
 348         if (!env || !env->arch) { /* Assume local operation */
 349                 static struct utsname uts = { .machine[0] = '\0', };
 350                 if (uts.machine[0] == '\0' && uname(&uts) < 0)
 351                         return NULL;
 352                 arch_name = uts.machine;
 353         } else
 354                 arch_name = env->arch;
 355
 356         return normalize_arch(arch_name);
 357 }
 358
 359
 360 int perf_env__numa_node(struct perf_env *env, int cpu)
 361 {
 362         if (!env->nr_numa_map) {
 363                 struct numa_node *nn;
 364                 int i, nr = 0;
 365
 366                 for (i = 0; i < env->nr_numa_nodes; i++) {
 367                         nn = &env->numa_nodes[i];
 368                         nr = max(nr, perf_cpu_map__max(nn->map));
 369                 }
 370
 371                 nr++;
 372
 373                 /*
 374                  * We initialize the numa_map array to prepare
 375                  * it for missing cpus, which return node -1
 376                  */
 377                 env->numa_map = malloc(nr * sizeof(int));
 378                 if (!env->numa_map)
 379                         return -1;
 380
 381                 for (i = 0; i < nr; i++)
 382                         env->numa_map[i] = -1;
 383
 384                 env->nr_numa_map = nr;
 385
 386                 for (i = 0; i < env->nr_numa_nodes; i++) {
 387                         int tmp, j;
 388
 389                         nn = &env->numa_nodes[i];
 390                         perf_cpu_map__for_each_cpu(j, tmp, nn->map)
 391                                 env->numa_map[j] = i;
 392                 }
 393         }
 394
 395         return cpu >= 0 && cpu < env->nr_numa_map ? env->numa_map[cpu] : -1;
 396 }