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);
150 env->bpf_progs.infos_cnt = 0;
152 root = &env->bpf_progs.btfs;
153 next = rb_first(root);
156 struct btf_node *node;
158 node = rb_entry(next, struct btf_node, rb_node);
159 next = rb_next(&node->rb_node);
160 rb_erase(&node->rb_node, root);
164 env->bpf_progs.btfs_cnt = 0;
166 up_write(&env->bpf_progs.lock);
168 #else // HAVE_LIBBPF_SUPPORT
169 static void perf_env__purge_bpf(struct perf_env *env __maybe_unused)
172 #endif // HAVE_LIBBPF_SUPPORT
174 void perf_env__exit(struct perf_env *env)
178 perf_env__purge_bpf(env);
179 perf_env__purge_cgroups(env);
180 zfree(&env->hostname);
181 zfree(&env->os_release);
182 zfree(&env->version);
184 zfree(&env->cpu_desc);
186 zfree(&env->cmdline);
187 zfree(&env->cmdline_argv);
188 zfree(&env->sibling_cores);
189 zfree(&env->sibling_threads);
190 zfree(&env->pmu_mappings);
192 zfree(&env->numa_map);
194 for (i = 0; i < env->nr_numa_nodes; i++)
195 perf_cpu_map__put(env->numa_nodes[i].map);
196 zfree(&env->numa_nodes);
198 for (i = 0; i < env->caches_cnt; i++)
199 cpu_cache_level__free(&env->caches[i]);
202 for (i = 0; i < env->nr_memory_nodes; i++)
203 zfree(&env->memory_nodes[i].set);
204 zfree(&env->memory_nodes);
207 void perf_env__init(struct perf_env *env __maybe_unused)
209 #ifdef HAVE_LIBBPF_SUPPORT
210 env->bpf_progs.infos = RB_ROOT;
211 env->bpf_progs.btfs = RB_ROOT;
212 init_rwsem(&env->bpf_progs.lock);
216 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
220 /* do not include NULL termination */
221 env->cmdline_argv = calloc(argc, sizeof(char *));
222 if (env->cmdline_argv == NULL)
226 * Must copy argv contents because it gets moved around during option
229 for (i = 0; i < argc ; i++) {
230 env->cmdline_argv[i] = argv[i];
231 if (env->cmdline_argv[i] == NULL)
235 env->nr_cmdline = argc;
239 zfree(&env->cmdline_argv);
244 int perf_env__read_cpu_topology_map(struct perf_env *env)
248 if (env->cpu != NULL)
251 if (env->nr_cpus_avail == 0)
252 env->nr_cpus_avail = cpu__max_present_cpu();
254 nr_cpus = env->nr_cpus_avail;
258 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
259 if (env->cpu == NULL)
262 for (cpu = 0; cpu < nr_cpus; ++cpu) {
263 env->cpu[cpu].core_id = cpu_map__get_core_id(cpu);
264 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
265 env->cpu[cpu].die_id = cpu_map__get_die_id(cpu);
268 env->nr_cpus_avail = nr_cpus;
272 int perf_env__read_cpuid(struct perf_env *env)
275 int err = get_cpuid(cpuid, sizeof(cpuid));
281 env->cpuid = strdup(cpuid);
282 if (env->cpuid == NULL)
287 static int perf_env__read_arch(struct perf_env *env)
295 env->arch = strdup(uts.machine);
297 return env->arch ? 0 : -ENOMEM;
300 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
302 if (env->nr_cpus_avail == 0)
303 env->nr_cpus_avail = cpu__max_present_cpu();
305 return env->nr_cpus_avail ? 0 : -ENOENT;
308 const char *perf_env__raw_arch(struct perf_env *env)
310 return env && !perf_env__read_arch(env) ? env->arch : "unknown";
313 int perf_env__nr_cpus_avail(struct perf_env *env)
315 return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
318 void cpu_cache_level__free(struct cpu_cache_level *cache)
326 * Return architecture name in a normalized form.
327 * The conversion logic comes from the Makefile.
329 static const char *normalize_arch(char *arch)
331 if (!strcmp(arch, "x86_64"))
333 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
335 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
337 if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
339 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
341 if (!strncmp(arch, "s390", 4))
343 if (!strncmp(arch, "parisc", 6))
345 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
347 if (!strncmp(arch, "mips", 4))
349 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
355 const char *perf_env__arch(struct perf_env *env)
359 if (!env || !env->arch) { /* Assume local operation */
360 static struct utsname uts = { .machine[0] = '\0', };
361 if (uts.machine[0] == '\0' && uname(&uts) < 0)
363 arch_name = uts.machine;
365 arch_name = env->arch;
367 return normalize_arch(arch_name);
371 int perf_env__numa_node(struct perf_env *env, int cpu)
373 if (!env->nr_numa_map) {
374 struct numa_node *nn;
377 for (i = 0; i < env->nr_numa_nodes; i++) {
378 nn = &env->numa_nodes[i];
379 nr = max(nr, perf_cpu_map__max(nn->map));
385 * We initialize the numa_map array to prepare
386 * it for missing cpus, which return node -1
388 env->numa_map = malloc(nr * sizeof(int));
392 for (i = 0; i < nr; i++)
393 env->numa_map[i] = -1;
395 env->nr_numa_map = nr;
397 for (i = 0; i < env->nr_numa_nodes; i++) {
400 nn = &env->numa_nodes[i];
401 perf_cpu_map__for_each_cpu(j, tmp, nn->map)
402 env->numa_map[j] = i;
406 return cpu >= 0 && cpu < env->nr_numa_map ? env->numa_map[cpu] : -1;