tools/perf/util/env.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "cpumap.h"
   3 #include "env.h"
   4 #include "sane_ctype.h"
   5 #include "util.h"
   6 #include <errno.h>
   7 #include <sys/utsname.h>
   8
   9 struct perf_env perf_env;
  10
  11 void perf_env__exit(struct perf_env *env)
  12 {
  13         int i;
  14
  15         zfree(&env->hostname);
  16         zfree(&env->os_release);
  17         zfree(&env->version);
  18         zfree(&env->arch);
  19         zfree(&env->cpu_desc);
  20         zfree(&env->cpuid);
  21         zfree(&env->cmdline);
  22         zfree(&env->cmdline_argv);
  23         zfree(&env->sibling_cores);
  24         zfree(&env->sibling_threads);
  25         zfree(&env->pmu_mappings);
  26         zfree(&env->cpu);
  27
  28         for (i = 0; i < env->nr_numa_nodes; i++)
  29                 cpu_map__put(env->numa_nodes[i].map);
  30         zfree(&env->numa_nodes);
  31
  32         for (i = 0; i < env->caches_cnt; i++)
  33                 cpu_cache_level__free(&env->caches[i]);
  34         zfree(&env->caches);
  35
  36         for (i = 0; i < env->nr_memory_nodes; i++)
  37                 free(env->memory_nodes[i].set);
  38         zfree(&env->memory_nodes);
  39 }
  40
  41 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
  42 {
  43         int i;
  44
  45         /* do not include NULL termination */
  46         env->cmdline_argv = calloc(argc, sizeof(char *));
  47         if (env->cmdline_argv == NULL)
  48                 goto out_enomem;
  49
  50         /*
  51          * Must copy argv contents because it gets moved around during option
  52          * parsing:
  53          */
  54         for (i = 0; i < argc ; i++) {
  55                 env->cmdline_argv[i] = argv[i];
  56                 if (env->cmdline_argv[i] == NULL)
  57                         goto out_free;
  58         }
  59
  60         env->nr_cmdline = argc;
  61
  62         return 0;
  63 out_free:
  64         zfree(&env->cmdline_argv);
  65 out_enomem:
  66         return -ENOMEM;
  67 }
  68
  69 int perf_env__read_cpu_topology_map(struct perf_env *env)
  70 {
  71         int cpu, nr_cpus;
  72
  73         if (env->cpu != NULL)
  74                 return 0;
  75
  76         if (env->nr_cpus_avail == 0)
  77                 env->nr_cpus_avail = cpu__max_present_cpu();
  78
  79         nr_cpus = env->nr_cpus_avail;
  80         if (nr_cpus == -1)
  81                 return -EINVAL;
  82
  83         env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
  84         if (env->cpu == NULL)
  85                 return -ENOMEM;
  86
  87         for (cpu = 0; cpu < nr_cpus; ++cpu) {
  88                 env->cpu[cpu].core_id   = cpu_map__get_core_id(cpu);
  89                 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
  90         }
  91
  92         env->nr_cpus_avail = nr_cpus;
  93         return 0;
  94 }
  95
  96 static int perf_env__read_arch(struct perf_env *env)
  97 {
  98         struct utsname uts;
  99
 100         if (env->arch)
 101                 return 0;
 102
 103         if (!uname(&uts))
 104                 env->arch = strdup(uts.machine);
 105
 106         return env->arch ? 0 : -ENOMEM;
 107 }
 108
 109 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
 110 {
 111         if (env->nr_cpus_avail == 0)
 112                 env->nr_cpus_avail = cpu__max_present_cpu();
 113
 114         return env->nr_cpus_avail ? 0 : -ENOENT;
 115 }
 116
 117 const char *perf_env__raw_arch(struct perf_env *env)
 118 {
 119         return env && !perf_env__read_arch(env) ? env->arch : "unknown";
 120 }
 121
 122 int perf_env__nr_cpus_avail(struct perf_env *env)
 123 {
 124         return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
 125 }
 126
 127 void cpu_cache_level__free(struct cpu_cache_level *cache)
 128 {
 129         free(cache->type);
 130         free(cache->map);
 131         free(cache->size);
 132 }
 133
 134 /*
 135  * Return architecture name in a normalized form.
 136  * The conversion logic comes from the Makefile.
 137  */
 138 static const char *normalize_arch(char *arch)
 139 {
 140         if (!strcmp(arch, "x86_64"))
 141                 return "x86";
 142         if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
 143                 return "x86";
 144         if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
 145                 return "sparc";
 146         if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
 147                 return "arm64";
 148         if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
 149                 return "arm";
 150         if (!strncmp(arch, "s390", 4))
 151                 return "s390";
 152         if (!strncmp(arch, "parisc", 6))
 153                 return "parisc";
 154         if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
 155                 return "powerpc";
 156         if (!strncmp(arch, "mips", 4))
 157                 return "mips";
 158         if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
 159                 return "sh";
 160
 161         return arch;
 162 }
 163
 164 const char *perf_env__arch(struct perf_env *env)
 165 {
 166         struct utsname uts;
 167         char *arch_name;
 168
 169         if (!env || !env->arch) { /* Assume local operation */
 170                 if (uname(&uts) < 0)
 171                         return NULL;
 172                 arch_name = uts.machine;
 173         } else
 174                 arch_name = env->arch;
 175
 176         return normalize_arch(arch_name);
 177 }