diff options
Diffstat (limited to 'tools/perf/util/env.c')
| -rw-r--r-- | tools/perf/util/env.c | 595 |
1 files changed, 595 insertions, 0 deletions
diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c new file mode 100644 index 000000000..5d878bae7 --- /dev/null +++ b/tools/perf/util/env.c @@ -0,0 +1,595 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "cpumap.h" +#include "debug.h" +#include "env.h" +#include "util/header.h" +#include <linux/ctype.h> +#include <linux/zalloc.h> +#include "cgroup.h" +#include <errno.h> +#include <sys/utsname.h> +#include <stdlib.h> +#include <string.h> +#include "strbuf.h" + +struct perf_env perf_env; + +#ifdef HAVE_LIBBPF_SUPPORT +#include "bpf-event.h" +#include "bpf-utils.h" +#include <bpf/libbpf.h> + +void perf_env__insert_bpf_prog_info(struct perf_env *env, + struct bpf_prog_info_node *info_node) +{ + down_write(&env->bpf_progs.lock); + __perf_env__insert_bpf_prog_info(env, info_node); + up_write(&env->bpf_progs.lock); +} + +void __perf_env__insert_bpf_prog_info(struct perf_env *env, struct bpf_prog_info_node *info_node) +{ + __u32 prog_id = info_node->info_linear->info.id; + struct bpf_prog_info_node *node; + struct rb_node *parent = NULL; + struct rb_node **p; + + p = &env->bpf_progs.infos.rb_node; + + while (*p != NULL) { + parent = *p; + node = rb_entry(parent, struct bpf_prog_info_node, rb_node); + if (prog_id < node->info_linear->info.id) { + p = &(*p)->rb_left; + } else if (prog_id > node->info_linear->info.id) { + p = &(*p)->rb_right; + } else { + pr_debug("duplicated bpf prog info %u\n", prog_id); + return; + } + } + + rb_link_node(&info_node->rb_node, parent, p); + rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos); + env->bpf_progs.infos_cnt++; +} + +struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env, + __u32 prog_id) +{ + struct bpf_prog_info_node *node = NULL; + struct rb_node *n; + + down_read(&env->bpf_progs.lock); + n = env->bpf_progs.infos.rb_node; + + while (n) { + node = rb_entry(n, struct bpf_prog_info_node, rb_node); + if (prog_id < node->info_linear->info.id) + n = n->rb_left; + else if (prog_id > node->info_linear->info.id) + n = n->rb_right; + else + goto out; + } + node = NULL; + +out: + up_read(&env->bpf_progs.lock); + return node; +} + +bool perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node) +{ + bool ret; + + down_write(&env->bpf_progs.lock); + ret = __perf_env__insert_btf(env, btf_node); + up_write(&env->bpf_progs.lock); + return ret; +} + +bool __perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node) +{ + struct rb_node *parent = NULL; + __u32 btf_id = btf_node->id; + struct btf_node *node; + struct rb_node **p; + + p = &env->bpf_progs.btfs.rb_node; + + while (*p != NULL) { + parent = *p; + node = rb_entry(parent, struct btf_node, rb_node); + if (btf_id < node->id) { + p = &(*p)->rb_left; + } else if (btf_id > node->id) { + p = &(*p)->rb_right; + } else { + pr_debug("duplicated btf %u\n", btf_id); + return false; + } + } + + rb_link_node(&btf_node->rb_node, parent, p); + rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs); + env->bpf_progs.btfs_cnt++; + return true; +} + +struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id) +{ + struct btf_node *res; + + down_read(&env->bpf_progs.lock); + res = __perf_env__find_btf(env, btf_id); + up_read(&env->bpf_progs.lock); + return res; +} + +struct btf_node *__perf_env__find_btf(struct perf_env *env, __u32 btf_id) +{ + struct btf_node *node = NULL; + struct rb_node *n; + + n = env->bpf_progs.btfs.rb_node; + + while (n) { + node = rb_entry(n, struct btf_node, rb_node); + if (btf_id < node->id) + n = n->rb_left; + else if (btf_id > node->id) + n = n->rb_right; + else + return node; + } + return NULL; +} + +/* purge data in bpf_progs.infos tree */ +static void perf_env__purge_bpf(struct perf_env *env) +{ + struct rb_root *root; + struct rb_node *next; + + down_write(&env->bpf_progs.lock); + + root = &env->bpf_progs.infos; + next = rb_first(root); + + while (next) { + struct bpf_prog_info_node *node; + + node = rb_entry(next, struct bpf_prog_info_node, rb_node); + next = rb_next(&node->rb_node); + rb_erase(&node->rb_node, root); + free(node->info_linear); + free(node); + } + + env->bpf_progs.infos_cnt = 0; + + root = &env->bpf_progs.btfs; + next = rb_first(root); + + while (next) { + struct btf_node *node; + + node = rb_entry(next, struct btf_node, rb_node); + next = rb_next(&node->rb_node); + rb_erase(&node->rb_node, root); + free(node); + } + + env->bpf_progs.btfs_cnt = 0; + + up_write(&env->bpf_progs.lock); +} +#else // HAVE_LIBBPF_SUPPORT +static void perf_env__purge_bpf(struct perf_env *env __maybe_unused) +{ +} +#endif // HAVE_LIBBPF_SUPPORT + +void perf_env__exit(struct perf_env *env) +{ + int i, j; + + perf_env__purge_bpf(env); + perf_env__purge_cgroups(env); + zfree(&env->hostname); + zfree(&env->os_release); + zfree(&env->version); + zfree(&env->arch); + zfree(&env->cpu_desc); + zfree(&env->cpuid); + zfree(&env->cmdline); + zfree(&env->cmdline_argv); + zfree(&env->sibling_dies); + zfree(&env->sibling_cores); + zfree(&env->sibling_threads); + zfree(&env->pmu_mappings); + zfree(&env->cpu); + for (i = 0; i < env->nr_cpu_pmu_caps; i++) + zfree(&env->cpu_pmu_caps[i]); + zfree(&env->cpu_pmu_caps); + zfree(&env->numa_map); + + for (i = 0; i < env->nr_numa_nodes; i++) + perf_cpu_map__put(env->numa_nodes[i].map); + zfree(&env->numa_nodes); + + for (i = 0; i < env->caches_cnt; i++) + cpu_cache_level__free(&env->caches[i]); + zfree(&env->caches); + + for (i = 0; i < env->nr_memory_nodes; i++) + zfree(&env->memory_nodes[i].set); + zfree(&env->memory_nodes); + + for (i = 0; i < env->nr_hybrid_nodes; i++) { + zfree(&env->hybrid_nodes[i].pmu_name); + zfree(&env->hybrid_nodes[i].cpus); + } + zfree(&env->hybrid_nodes); + + for (i = 0; i < env->nr_pmus_with_caps; i++) { + for (j = 0; j < env->pmu_caps[i].nr_caps; j++) + zfree(&env->pmu_caps[i].caps[j]); + zfree(&env->pmu_caps[i].caps); + zfree(&env->pmu_caps[i].pmu_name); + } + zfree(&env->pmu_caps); +} + +void perf_env__init(struct perf_env *env) +{ +#ifdef HAVE_LIBBPF_SUPPORT + env->bpf_progs.infos = RB_ROOT; + env->bpf_progs.btfs = RB_ROOT; + init_rwsem(&env->bpf_progs.lock); +#endif + env->kernel_is_64_bit = -1; +} + +static void perf_env__init_kernel_mode(struct perf_env *env) +{ + const char *arch = perf_env__raw_arch(env); + + if (!strncmp(arch, "x86_64", 6) || !strncmp(arch, "aarch64", 7) || + !strncmp(arch, "arm64", 5) || !strncmp(arch, "mips64", 6) || + !strncmp(arch, "parisc64", 8) || !strncmp(arch, "riscv64", 7) || + !strncmp(arch, "s390x", 5) || !strncmp(arch, "sparc64", 7)) + env->kernel_is_64_bit = 1; + else + env->kernel_is_64_bit = 0; +} + +int perf_env__kernel_is_64_bit(struct perf_env *env) +{ + if (env->kernel_is_64_bit == -1) + perf_env__init_kernel_mode(env); + + return env->kernel_is_64_bit; +} + +int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[]) +{ + int i; + + /* do not include NULL termination */ + env->cmdline_argv = calloc(argc, sizeof(char *)); + if (env->cmdline_argv == NULL) + goto out_enomem; + + /* + * Must copy argv contents because it gets moved around during option + * parsing: + */ + for (i = 0; i < argc ; i++) { + env->cmdline_argv[i] = argv[i]; + if (env->cmdline_argv[i] == NULL) + goto out_free; + } + + env->nr_cmdline = argc; + + return 0; +out_free: + zfree(&env->cmdline_argv); +out_enomem: + return -ENOMEM; +} + +int perf_env__read_cpu_topology_map(struct perf_env *env) +{ + int idx, nr_cpus; + + if (env->cpu != NULL) + return 0; + + if (env->nr_cpus_avail == 0) + env->nr_cpus_avail = cpu__max_present_cpu().cpu; + + nr_cpus = env->nr_cpus_avail; + if (nr_cpus == -1) + return -EINVAL; + + env->cpu = calloc(nr_cpus, sizeof(env->cpu[0])); + if (env->cpu == NULL) + return -ENOMEM; + + for (idx = 0; idx < nr_cpus; ++idx) { + struct perf_cpu cpu = { .cpu = idx }; + + env->cpu[idx].core_id = cpu__get_core_id(cpu); + env->cpu[idx].socket_id = cpu__get_socket_id(cpu); + env->cpu[idx].die_id = cpu__get_die_id(cpu); + } + + env->nr_cpus_avail = nr_cpus; + return 0; +} + +int perf_env__read_pmu_mappings(struct perf_env *env) +{ + struct perf_pmu *pmu = NULL; + u32 pmu_num = 0; + struct strbuf sb; + + while ((pmu = perf_pmu__scan(pmu))) { + if (!pmu->name) + continue; + pmu_num++; + } + if (!pmu_num) { + pr_debug("pmu mappings not available\n"); + return -ENOENT; + } + env->nr_pmu_mappings = pmu_num; + + if (strbuf_init(&sb, 128 * pmu_num) < 0) + return -ENOMEM; + + while ((pmu = perf_pmu__scan(pmu))) { + if (!pmu->name) + continue; + if (strbuf_addf(&sb, "%u:%s", pmu->type, pmu->name) < 0) + goto error; + /* include a NULL character at the end */ + if (strbuf_add(&sb, "", 1) < 0) + goto error; + } + + env->pmu_mappings = strbuf_detach(&sb, NULL); + + return 0; + +error: + strbuf_release(&sb); + return -1; +} + +int perf_env__read_cpuid(struct perf_env *env) +{ + char cpuid[128]; + int err = get_cpuid(cpuid, sizeof(cpuid)); + + if (err) + return err; + + free(env->cpuid); + env->cpuid = strdup(cpuid); + if (env->cpuid == NULL) + return ENOMEM; + return 0; +} + +static int perf_env__read_arch(struct perf_env *env) +{ + struct utsname uts; + + if (env->arch) + return 0; + + if (!uname(&uts)) + env->arch = strdup(uts.machine); + + return env->arch ? 0 : -ENOMEM; +} + +static int perf_env__read_nr_cpus_avail(struct perf_env *env) +{ + if (env->nr_cpus_avail == 0) + env->nr_cpus_avail = cpu__max_present_cpu().cpu; + + return env->nr_cpus_avail ? 0 : -ENOENT; +} + +const char *perf_env__raw_arch(struct perf_env *env) +{ + return env && !perf_env__read_arch(env) ? env->arch : "unknown"; +} + +int perf_env__nr_cpus_avail(struct perf_env *env) +{ + return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0; +} + +void cpu_cache_level__free(struct cpu_cache_level *cache) +{ + zfree(&cache->type); + zfree(&cache->map); + zfree(&cache->size); +} + +/* + * Return architecture name in a normalized form. + * The conversion logic comes from the Makefile. + */ +static const char *normalize_arch(char *arch) +{ + if (!strcmp(arch, "x86_64")) + return "x86"; + if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6') + return "x86"; + if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5)) + return "sparc"; + if (!strncmp(arch, "aarch64", 7) || !strncmp(arch, "arm64", 5)) + return "arm64"; + if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110")) + return "arm"; + if (!strncmp(arch, "s390", 4)) + return "s390"; + if (!strncmp(arch, "parisc", 6)) + return "parisc"; + if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3)) + return "powerpc"; + if (!strncmp(arch, "mips", 4)) + return "mips"; + if (!strncmp(arch, "sh", 2) && isdigit(arch[2])) + return "sh"; + + return arch; +} + +const char *perf_env__arch(struct perf_env *env) +{ + char *arch_name; + + if (!env || !env->arch) { /* Assume local operation */ + static struct utsname uts = { .machine[0] = '\0', }; + if (uts.machine[0] == '\0' && uname(&uts) < 0) + return NULL; + arch_name = uts.machine; + } else + arch_name = env->arch; + + return normalize_arch(arch_name); +} + +const char *perf_env__cpuid(struct perf_env *env) +{ + int status; + + if (!env || !env->cpuid) { /* Assume local operation */ + status = perf_env__read_cpuid(env); + if (status) + return NULL; + } + + return env->cpuid; +} + +int perf_env__nr_pmu_mappings(struct perf_env *env) +{ + int status; + + if (!env || !env->nr_pmu_mappings) { /* Assume local operation */ + status = perf_env__read_pmu_mappings(env); + if (status) + return 0; + } + + return env->nr_pmu_mappings; +} + +const char *perf_env__pmu_mappings(struct perf_env *env) +{ + int status; + + if (!env || !env->pmu_mappings) { /* Assume local operation */ + status = perf_env__read_pmu_mappings(env); + if (status) + return NULL; + } + + return env->pmu_mappings; +} + +int perf_env__numa_node(struct perf_env *env, struct perf_cpu cpu) +{ + if (!env->nr_numa_map) { + struct numa_node *nn; + int i, nr = 0; + + for (i = 0; i < env->nr_numa_nodes; i++) { + nn = &env->numa_nodes[i]; + nr = max(nr, perf_cpu_map__max(nn->map).cpu); + } + + nr++; + + /* + * We initialize the numa_map array to prepare + * it for missing cpus, which return node -1 + */ + env->numa_map = malloc(nr * sizeof(int)); + if (!env->numa_map) + return -1; + + for (i = 0; i < nr; i++) + env->numa_map[i] = -1; + + env->nr_numa_map = nr; + + for (i = 0; i < env->nr_numa_nodes; i++) { + struct perf_cpu tmp; + int j; + + nn = &env->numa_nodes[i]; + perf_cpu_map__for_each_cpu(tmp, j, nn->map) + env->numa_map[tmp.cpu] = i; + } + } + + return cpu.cpu >= 0 && cpu.cpu < env->nr_numa_map ? env->numa_map[cpu.cpu] : -1; +} + +char *perf_env__find_pmu_cap(struct perf_env *env, const char *pmu_name, + const char *cap) +{ + char *cap_eq; + int cap_size; + char **ptr; + int i, j; + + if (!pmu_name || !cap) + return NULL; + + cap_size = strlen(cap); + cap_eq = zalloc(cap_size + 2); + if (!cap_eq) + return NULL; + + memcpy(cap_eq, cap, cap_size); + cap_eq[cap_size] = '='; + + if (!strcmp(pmu_name, "cpu")) { + for (i = 0; i < env->nr_cpu_pmu_caps; i++) { + if (!strncmp(env->cpu_pmu_caps[i], cap_eq, cap_size + 1)) { + free(cap_eq); + return &env->cpu_pmu_caps[i][cap_size + 1]; + } + } + goto out; + } + + for (i = 0; i < env->nr_pmus_with_caps; i++) { + if (strcmp(env->pmu_caps[i].pmu_name, pmu_name)) + continue; + + ptr = env->pmu_caps[i].caps; + + for (j = 0; j < env->pmu_caps[i].nr_caps; j++) { + if (!strncmp(ptr[j], cap_eq, cap_size + 1)) { + free(cap_eq); + return &ptr[j][cap_size + 1]; + } + } + } + +out: + free(cap_eq); + return NULL; +} |