1 // SPDX-License-Identifier: GPL-2.0
5 #include "util/header.h"
6 #include <linux/ctype.h>
7 #include <linux/zalloc.h>
10 #include <sys/utsname.h>
14 struct perf_env perf_env;
16 #ifdef HAVE_LIBBPF_SUPPORT
17 #include "bpf-event.h"
18 #include <bpf/libbpf.h>
20 void perf_env__insert_bpf_prog_info(struct perf_env *env,
21 struct bpf_prog_info_node *info_node)
23 __u32 prog_id = info_node->info_linear->info.id;
24 struct bpf_prog_info_node *node;
25 struct rb_node *parent = NULL;
28 down_write(&env->bpf_progs.lock);
29 p = &env->bpf_progs.infos.rb_node;
33 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
34 if (prog_id < node->info_linear->info.id) {
36 } else if (prog_id > node->info_linear->info.id) {
39 pr_debug("duplicated bpf prog info %u\n", prog_id);
44 rb_link_node(&info_node->rb_node, parent, p);
45 rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
46 env->bpf_progs.infos_cnt++;
48 up_write(&env->bpf_progs.lock);
51 struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
54 struct bpf_prog_info_node *node = NULL;
57 down_read(&env->bpf_progs.lock);
58 n = env->bpf_progs.infos.rb_node;
61 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
62 if (prog_id < node->info_linear->info.id)
64 else if (prog_id > node->info_linear->info.id)
72 up_read(&env->bpf_progs.lock);
76 void perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
78 struct rb_node *parent = NULL;
79 __u32 btf_id = btf_node->id;
80 struct btf_node *node;
83 down_write(&env->bpf_progs.lock);
84 p = &env->bpf_progs.btfs.rb_node;
88 node = rb_entry(parent, struct btf_node, rb_node);
89 if (btf_id < node->id) {
91 } else if (btf_id > node->id) {
94 pr_debug("duplicated btf %u\n", btf_id);
99 rb_link_node(&btf_node->rb_node, parent, p);
100 rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
101 env->bpf_progs.btfs_cnt++;
103 up_write(&env->bpf_progs.lock);
106 struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
108 struct btf_node *node = NULL;
111 down_read(&env->bpf_progs.lock);
112 n = env->bpf_progs.btfs.rb_node;
115 node = rb_entry(n, struct btf_node, rb_node);
116 if (btf_id < node->id)
118 else if (btf_id > node->id)
126 up_read(&env->bpf_progs.lock);
130 /* purge data in bpf_progs.infos tree */
131 static void perf_env__purge_bpf(struct perf_env *env)
133 struct rb_root *root;
134 struct rb_node *next;
136 down_write(&env->bpf_progs.lock);
138 root = &env->bpf_progs.infos;
139 next = rb_first(root);
142 struct bpf_prog_info_node *node;
144 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
145 next = rb_next(&node->rb_node);
146 rb_erase(&node->rb_node, root);
147 free(node->info_linear);
151 env->bpf_progs.infos_cnt = 0;
153 root = &env->bpf_progs.btfs;
154 next = rb_first(root);
157 struct btf_node *node;
159 node = rb_entry(next, struct btf_node, rb_node);
160 next = rb_next(&node->rb_node);
161 rb_erase(&node->rb_node, root);
165 env->bpf_progs.btfs_cnt = 0;
167 up_write(&env->bpf_progs.lock);
169 #else // HAVE_LIBBPF_SUPPORT
170 static void perf_env__purge_bpf(struct perf_env *env __maybe_unused)
173 #endif // HAVE_LIBBPF_SUPPORT
175 void perf_env__exit(struct perf_env *env)
179 perf_env__purge_bpf(env);
180 perf_env__purge_cgroups(env);
181 zfree(&env->hostname);
182 zfree(&env->os_release);
183 zfree(&env->version);
185 zfree(&env->cpu_desc);
187 zfree(&env->cmdline);
188 zfree(&env->cmdline_argv);
189 zfree(&env->sibling_dies);
190 zfree(&env->sibling_cores);
191 zfree(&env->sibling_threads);
192 zfree(&env->pmu_mappings);
194 zfree(&env->cpu_pmu_caps);
195 zfree(&env->numa_map);
197 for (i = 0; i < env->nr_numa_nodes; i++)
198 perf_cpu_map__put(env->numa_nodes[i].map);
199 zfree(&env->numa_nodes);
201 for (i = 0; i < env->caches_cnt; i++)
202 cpu_cache_level__free(&env->caches[i]);
205 for (i = 0; i < env->nr_memory_nodes; i++)
206 zfree(&env->memory_nodes[i].set);
207 zfree(&env->memory_nodes);
209 for (i = 0; i < env->nr_hybrid_nodes; i++) {
210 zfree(&env->hybrid_nodes[i].pmu_name);
211 zfree(&env->hybrid_nodes[i].cpus);
213 zfree(&env->hybrid_nodes);
215 for (i = 0; i < env->nr_hybrid_cpc_nodes; i++) {
216 zfree(&env->hybrid_cpc_nodes[i].cpu_pmu_caps);
217 zfree(&env->hybrid_cpc_nodes[i].pmu_name);
219 zfree(&env->hybrid_cpc_nodes);
222 void perf_env__init(struct perf_env *env)
224 #ifdef HAVE_LIBBPF_SUPPORT
225 env->bpf_progs.infos = RB_ROOT;
226 env->bpf_progs.btfs = RB_ROOT;
227 init_rwsem(&env->bpf_progs.lock);
229 env->kernel_is_64_bit = -1;
232 static void perf_env__init_kernel_mode(struct perf_env *env)
234 const char *arch = perf_env__raw_arch(env);
236 if (!strncmp(arch, "x86_64", 6) || !strncmp(arch, "aarch64", 7) ||
237 !strncmp(arch, "arm64", 5) || !strncmp(arch, "mips64", 6) ||
238 !strncmp(arch, "parisc64", 8) || !strncmp(arch, "riscv64", 7) ||
239 !strncmp(arch, "s390x", 5) || !strncmp(arch, "sparc64", 7))
240 env->kernel_is_64_bit = 1;
242 env->kernel_is_64_bit = 0;
245 int perf_env__kernel_is_64_bit(struct perf_env *env)
247 if (env->kernel_is_64_bit == -1)
248 perf_env__init_kernel_mode(env);
250 return env->kernel_is_64_bit;
253 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
257 /* do not include NULL termination */
258 env->cmdline_argv = calloc(argc, sizeof(char *));
259 if (env->cmdline_argv == NULL)
263 * Must copy argv contents because it gets moved around during option
266 for (i = 0; i < argc ; i++) {
267 env->cmdline_argv[i] = argv[i];
268 if (env->cmdline_argv[i] == NULL)
272 env->nr_cmdline = argc;
276 zfree(&env->cmdline_argv);
281 int perf_env__read_cpu_topology_map(struct perf_env *env)
285 if (env->cpu != NULL)
288 if (env->nr_cpus_avail == 0)
289 env->nr_cpus_avail = cpu__max_present_cpu();
291 nr_cpus = env->nr_cpus_avail;
295 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
296 if (env->cpu == NULL)
299 for (cpu = 0; cpu < nr_cpus; ++cpu) {
300 env->cpu[cpu].core_id = cpu_map__get_core_id(cpu);
301 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
302 env->cpu[cpu].die_id = cpu_map__get_die_id(cpu);
305 env->nr_cpus_avail = nr_cpus;
309 int perf_env__read_cpuid(struct perf_env *env)
312 int err = get_cpuid(cpuid, sizeof(cpuid));
318 env->cpuid = strdup(cpuid);
319 if (env->cpuid == NULL)
324 static int perf_env__read_arch(struct perf_env *env)
332 env->arch = strdup(uts.machine);
334 return env->arch ? 0 : -ENOMEM;
337 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
339 if (env->nr_cpus_avail == 0)
340 env->nr_cpus_avail = cpu__max_present_cpu();
342 return env->nr_cpus_avail ? 0 : -ENOENT;
345 const char *perf_env__raw_arch(struct perf_env *env)
347 return env && !perf_env__read_arch(env) ? env->arch : "unknown";
350 int perf_env__nr_cpus_avail(struct perf_env *env)
352 return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
355 void cpu_cache_level__free(struct cpu_cache_level *cache)
363 * Return architecture name in a normalized form.
364 * The conversion logic comes from the Makefile.
366 static const char *normalize_arch(char *arch)
368 if (!strcmp(arch, "x86_64"))
370 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
372 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
374 if (!strncmp(arch, "aarch64", 7) || !strncmp(arch, "arm64", 5))
376 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
378 if (!strncmp(arch, "s390", 4))
380 if (!strncmp(arch, "parisc", 6))
382 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
384 if (!strncmp(arch, "mips", 4))
386 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
392 const char *perf_env__arch(struct perf_env *env)
396 if (!env || !env->arch) { /* Assume local operation */
397 static struct utsname uts = { .machine[0] = '\0', };
398 if (uts.machine[0] == '\0' && uname(&uts) < 0)
400 arch_name = uts.machine;
402 arch_name = env->arch;
404 return normalize_arch(arch_name);
408 int perf_env__numa_node(struct perf_env *env, int cpu)
410 if (!env->nr_numa_map) {
411 struct numa_node *nn;
414 for (i = 0; i < env->nr_numa_nodes; i++) {
415 nn = &env->numa_nodes[i];
416 nr = max(nr, perf_cpu_map__max(nn->map));
422 * We initialize the numa_map array to prepare
423 * it for missing cpus, which return node -1
425 env->numa_map = malloc(nr * sizeof(int));
429 for (i = 0; i < nr; i++)
430 env->numa_map[i] = -1;
432 env->nr_numa_map = nr;
434 for (i = 0; i < env->nr_numa_nodes; i++) {
437 nn = &env->numa_nodes[i];
438 perf_cpu_map__for_each_cpu(j, tmp, nn->map)
439 env->numa_map[j] = i;
443 return cpu >= 0 && cpu < env->nr_numa_map ? env->numa_map[cpu] : -1;