1 // SPDX-License-Identifier: GPL-2.0
5 #include "util/header.h"
6 #include "linux/compiler.h"
7 #include <linux/ctype.h>
8 #include <linux/string.h>
9 #include <linux/zalloc.h>
12 #include <sys/utsname.h>
18 #include "trace/beauty/beauty.h"
20 struct perf_env perf_env;
22 #ifdef HAVE_LIBBPF_SUPPORT
23 #include "bpf-event.h"
24 #include "bpf-utils.h"
25 #include <bpf/libbpf.h>
27 void perf_env__insert_bpf_prog_info(struct perf_env *env,
28 struct bpf_prog_info_node *info_node)
30 down_write(&env->bpf_progs.lock);
31 __perf_env__insert_bpf_prog_info(env, info_node);
32 up_write(&env->bpf_progs.lock);
35 void __perf_env__insert_bpf_prog_info(struct perf_env *env, struct bpf_prog_info_node *info_node)
37 __u32 prog_id = info_node->info_linear->info.id;
38 struct bpf_prog_info_node *node;
39 struct rb_node *parent = NULL;
42 p = &env->bpf_progs.infos.rb_node;
46 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
47 if (prog_id < node->info_linear->info.id) {
49 } else if (prog_id > node->info_linear->info.id) {
52 pr_debug("duplicated bpf prog info %u\n", prog_id);
57 rb_link_node(&info_node->rb_node, parent, p);
58 rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
59 env->bpf_progs.infos_cnt++;
62 struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
65 struct bpf_prog_info_node *node = NULL;
68 down_read(&env->bpf_progs.lock);
69 n = env->bpf_progs.infos.rb_node;
72 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
73 if (prog_id < node->info_linear->info.id)
75 else if (prog_id > node->info_linear->info.id)
83 up_read(&env->bpf_progs.lock);
87 bool perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
91 down_write(&env->bpf_progs.lock);
92 ret = __perf_env__insert_btf(env, btf_node);
93 up_write(&env->bpf_progs.lock);
97 bool __perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
99 struct rb_node *parent = NULL;
100 __u32 btf_id = btf_node->id;
101 struct btf_node *node;
104 p = &env->bpf_progs.btfs.rb_node;
108 node = rb_entry(parent, struct btf_node, rb_node);
109 if (btf_id < node->id) {
111 } else if (btf_id > node->id) {
114 pr_debug("duplicated btf %u\n", btf_id);
119 rb_link_node(&btf_node->rb_node, parent, p);
120 rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
121 env->bpf_progs.btfs_cnt++;
125 struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
127 struct btf_node *res;
129 down_read(&env->bpf_progs.lock);
130 res = __perf_env__find_btf(env, btf_id);
131 up_read(&env->bpf_progs.lock);
135 struct btf_node *__perf_env__find_btf(struct perf_env *env, __u32 btf_id)
137 struct btf_node *node = NULL;
140 n = env->bpf_progs.btfs.rb_node;
143 node = rb_entry(n, struct btf_node, rb_node);
144 if (btf_id < node->id)
146 else if (btf_id > node->id)
154 /* purge data in bpf_progs.infos tree */
155 static void perf_env__purge_bpf(struct perf_env *env)
157 struct rb_root *root;
158 struct rb_node *next;
160 down_write(&env->bpf_progs.lock);
162 root = &env->bpf_progs.infos;
163 next = rb_first(root);
166 struct bpf_prog_info_node *node;
168 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
169 next = rb_next(&node->rb_node);
170 rb_erase(&node->rb_node, root);
171 zfree(&node->info_linear);
175 env->bpf_progs.infos_cnt = 0;
177 root = &env->bpf_progs.btfs;
178 next = rb_first(root);
181 struct btf_node *node;
183 node = rb_entry(next, struct btf_node, rb_node);
184 next = rb_next(&node->rb_node);
185 rb_erase(&node->rb_node, root);
189 env->bpf_progs.btfs_cnt = 0;
191 up_write(&env->bpf_progs.lock);
193 #else // HAVE_LIBBPF_SUPPORT
194 static void perf_env__purge_bpf(struct perf_env *env __maybe_unused)
197 #endif // HAVE_LIBBPF_SUPPORT
199 void perf_env__exit(struct perf_env *env)
203 perf_env__purge_bpf(env);
204 perf_env__purge_cgroups(env);
205 zfree(&env->hostname);
206 zfree(&env->os_release);
207 zfree(&env->version);
209 zfree(&env->cpu_desc);
211 zfree(&env->cmdline);
212 zfree(&env->cmdline_argv);
213 zfree(&env->sibling_dies);
214 zfree(&env->sibling_cores);
215 zfree(&env->sibling_threads);
216 zfree(&env->pmu_mappings);
218 for (i = 0; i < env->nr_cpu_pmu_caps; i++)
219 zfree(&env->cpu_pmu_caps[i]);
220 zfree(&env->cpu_pmu_caps);
221 zfree(&env->numa_map);
223 for (i = 0; i < env->nr_numa_nodes; i++)
224 perf_cpu_map__put(env->numa_nodes[i].map);
225 zfree(&env->numa_nodes);
227 for (i = 0; i < env->caches_cnt; i++)
228 cpu_cache_level__free(&env->caches[i]);
231 for (i = 0; i < env->nr_memory_nodes; i++)
232 zfree(&env->memory_nodes[i].set);
233 zfree(&env->memory_nodes);
235 for (i = 0; i < env->nr_hybrid_nodes; i++) {
236 zfree(&env->hybrid_nodes[i].pmu_name);
237 zfree(&env->hybrid_nodes[i].cpus);
239 zfree(&env->hybrid_nodes);
241 for (i = 0; i < env->nr_pmus_with_caps; i++) {
242 for (j = 0; j < env->pmu_caps[i].nr_caps; j++)
243 zfree(&env->pmu_caps[i].caps[j]);
244 zfree(&env->pmu_caps[i].caps);
245 zfree(&env->pmu_caps[i].pmu_name);
247 zfree(&env->pmu_caps);
250 void perf_env__init(struct perf_env *env)
252 #ifdef HAVE_LIBBPF_SUPPORT
253 env->bpf_progs.infos = RB_ROOT;
254 env->bpf_progs.btfs = RB_ROOT;
255 init_rwsem(&env->bpf_progs.lock);
257 env->kernel_is_64_bit = -1;
260 static void perf_env__init_kernel_mode(struct perf_env *env)
262 const char *arch = perf_env__raw_arch(env);
264 if (!strncmp(arch, "x86_64", 6) || !strncmp(arch, "aarch64", 7) ||
265 !strncmp(arch, "arm64", 5) || !strncmp(arch, "mips64", 6) ||
266 !strncmp(arch, "parisc64", 8) || !strncmp(arch, "riscv64", 7) ||
267 !strncmp(arch, "s390x", 5) || !strncmp(arch, "sparc64", 7))
268 env->kernel_is_64_bit = 1;
270 env->kernel_is_64_bit = 0;
273 int perf_env__kernel_is_64_bit(struct perf_env *env)
275 if (env->kernel_is_64_bit == -1)
276 perf_env__init_kernel_mode(env);
278 return env->kernel_is_64_bit;
281 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
285 /* do not include NULL termination */
286 env->cmdline_argv = calloc(argc, sizeof(char *));
287 if (env->cmdline_argv == NULL)
291 * Must copy argv contents because it gets moved around during option
294 for (i = 0; i < argc ; i++) {
295 env->cmdline_argv[i] = argv[i];
296 if (env->cmdline_argv[i] == NULL)
300 env->nr_cmdline = argc;
304 zfree(&env->cmdline_argv);
309 int perf_env__read_cpu_topology_map(struct perf_env *env)
313 if (env->cpu != NULL)
316 if (env->nr_cpus_avail == 0)
317 env->nr_cpus_avail = cpu__max_present_cpu().cpu;
319 nr_cpus = env->nr_cpus_avail;
323 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
324 if (env->cpu == NULL)
327 for (idx = 0; idx < nr_cpus; ++idx) {
328 struct perf_cpu cpu = { .cpu = idx };
330 env->cpu[idx].core_id = cpu__get_core_id(cpu);
331 env->cpu[idx].socket_id = cpu__get_socket_id(cpu);
332 env->cpu[idx].die_id = cpu__get_die_id(cpu);
335 env->nr_cpus_avail = nr_cpus;
339 int perf_env__read_pmu_mappings(struct perf_env *env)
341 struct perf_pmu *pmu = NULL;
345 while ((pmu = perf_pmus__scan(pmu)))
349 pr_debug("pmu mappings not available\n");
352 env->nr_pmu_mappings = pmu_num;
354 if (strbuf_init(&sb, 128 * pmu_num) < 0)
357 while ((pmu = perf_pmus__scan(pmu))) {
358 if (strbuf_addf(&sb, "%u:%s", pmu->type, pmu->name) < 0)
360 /* include a NULL character at the end */
361 if (strbuf_add(&sb, "", 1) < 0)
365 env->pmu_mappings = strbuf_detach(&sb, NULL);
374 int perf_env__read_cpuid(struct perf_env *env)
377 struct perf_cpu cpu = {-1};
378 int err = get_cpuid(cpuid, sizeof(cpuid), cpu);
384 env->cpuid = strdup(cpuid);
385 if (env->cpuid == NULL)
390 static int perf_env__read_arch(struct perf_env *env)
398 env->arch = strdup(uts.machine);
400 return env->arch ? 0 : -ENOMEM;
403 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
405 if (env->nr_cpus_avail == 0)
406 env->nr_cpus_avail = cpu__max_present_cpu().cpu;
408 return env->nr_cpus_avail ? 0 : -ENOENT;
411 const char *perf_env__raw_arch(struct perf_env *env)
413 return env && !perf_env__read_arch(env) ? env->arch : "unknown";
416 int perf_env__nr_cpus_avail(struct perf_env *env)
418 return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
421 void cpu_cache_level__free(struct cpu_cache_level *cache)
429 * Return architecture name in a normalized form.
430 * The conversion logic comes from the Makefile.
432 static const char *normalize_arch(char *arch)
434 if (!strcmp(arch, "x86_64"))
436 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
438 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
440 if (!strncmp(arch, "aarch64", 7) || !strncmp(arch, "arm64", 5))
442 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
444 if (!strncmp(arch, "s390", 4))
446 if (!strncmp(arch, "parisc", 6))
448 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
450 if (!strncmp(arch, "mips", 4))
452 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
454 if (!strncmp(arch, "loongarch", 9))
460 const char *perf_env__arch(struct perf_env *env)
464 if (!env || !env->arch) { /* Assume local operation */
465 static struct utsname uts = { .machine[0] = '\0', };
466 if (uts.machine[0] == '\0' && uname(&uts) < 0)
468 arch_name = uts.machine;
470 arch_name = env->arch;
472 return normalize_arch(arch_name);
475 const char *perf_env__arch_strerrno(struct perf_env *env __maybe_unused, int err __maybe_unused)
477 #if defined(HAVE_SYSCALL_TABLE_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
478 if (env->arch_strerrno == NULL)
479 env->arch_strerrno = arch_syscalls__strerrno_function(perf_env__arch(env));
481 return env->arch_strerrno ? env->arch_strerrno(err) : "no arch specific strerrno function";
483 return "!(HAVE_SYSCALL_TABLE_SUPPORT && HAVE_LIBTRACEEVENT)";
487 const char *perf_env__cpuid(struct perf_env *env)
491 if (!env->cpuid) { /* Assume local operation */
492 status = perf_env__read_cpuid(env);
500 int perf_env__nr_pmu_mappings(struct perf_env *env)
504 if (!env->nr_pmu_mappings) { /* Assume local operation */
505 status = perf_env__read_pmu_mappings(env);
510 return env->nr_pmu_mappings;
513 const char *perf_env__pmu_mappings(struct perf_env *env)
517 if (!env->pmu_mappings) { /* Assume local operation */
518 status = perf_env__read_pmu_mappings(env);
523 return env->pmu_mappings;
526 int perf_env__numa_node(struct perf_env *env, struct perf_cpu cpu)
528 if (!env->nr_numa_map) {
529 struct numa_node *nn;
532 for (i = 0; i < env->nr_numa_nodes; i++) {
533 nn = &env->numa_nodes[i];
534 nr = max(nr, perf_cpu_map__max(nn->map).cpu);
540 * We initialize the numa_map array to prepare
541 * it for missing cpus, which return node -1
543 env->numa_map = malloc(nr * sizeof(int));
547 for (i = 0; i < nr; i++)
548 env->numa_map[i] = -1;
550 env->nr_numa_map = nr;
552 for (i = 0; i < env->nr_numa_nodes; i++) {
556 nn = &env->numa_nodes[i];
557 perf_cpu_map__for_each_cpu(tmp, j, nn->map)
558 env->numa_map[tmp.cpu] = i;
562 return cpu.cpu >= 0 && cpu.cpu < env->nr_numa_map ? env->numa_map[cpu.cpu] : -1;
565 bool perf_env__has_pmu_mapping(struct perf_env *env, const char *pmu_name)
567 char *pmu_mapping = env->pmu_mappings, *colon;
569 for (int i = 0; i < env->nr_pmu_mappings; ++i) {
570 if (strtoul(pmu_mapping, &colon, 0) == ULONG_MAX || *colon != ':')
573 pmu_mapping = colon + 1;
574 if (strcmp(pmu_mapping, pmu_name) == 0)
577 pmu_mapping += strlen(pmu_mapping) + 1;
583 char *perf_env__find_pmu_cap(struct perf_env *env, const char *pmu_name,
591 if (!pmu_name || !cap)
594 cap_size = strlen(cap);
595 cap_eq = zalloc(cap_size + 2);
599 memcpy(cap_eq, cap, cap_size);
600 cap_eq[cap_size] = '=';
602 if (!strcmp(pmu_name, "cpu")) {
603 for (i = 0; i < env->nr_cpu_pmu_caps; i++) {
604 if (!strncmp(env->cpu_pmu_caps[i], cap_eq, cap_size + 1)) {
606 return &env->cpu_pmu_caps[i][cap_size + 1];
612 for (i = 0; i < env->nr_pmus_with_caps; i++) {
613 if (strcmp(env->pmu_caps[i].pmu_name, pmu_name))
616 ptr = env->pmu_caps[i].caps;
618 for (j = 0; j < env->pmu_caps[i].nr_caps; j++) {
619 if (!strncmp(ptr[j], cap_eq, cap_size + 1)) {
621 return &ptr[j][cap_size + 1];
631 void perf_env__find_br_cntr_info(struct perf_env *env,
636 *nr = env->cpu_pmu_caps ? env->br_cntr_nr :
637 env->pmu_caps->br_cntr_nr;
641 *width = env->cpu_pmu_caps ? env->br_cntr_width :
642 env->pmu_caps->br_cntr_width;
646 bool perf_env__is_x86_amd_cpu(struct perf_env *env)
648 static int is_amd; /* 0: Uninitialized, 1: Yes, -1: No */
651 is_amd = env->cpuid && strstarts(env->cpuid, "AuthenticAMD") ? 1 : -1;
653 return is_amd >= 1 ? true : false;
656 bool x86__is_amd_cpu(void)
658 struct perf_env env = { .total_mem = 0, };
661 perf_env__cpuid(&env);
662 is_amd = perf_env__is_x86_amd_cpu(&env);
663 perf_env__exit(&env);