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
  37 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
  38 {
  39         int i;
  40
  41         /* do not include NULL termination */
  42         env->cmdline_argv = calloc(argc, sizeof(char *));
  43         if (env->cmdline_argv == NULL)
  44                 goto out_enomem;
  45
  46         /*
  47          * Must copy argv contents because it gets moved around during option
  48          * parsing:
  49          */
  50         for (i = 0; i < argc ; i++) {
  51                 env->cmdline_argv[i] = argv[i];
  52                 if (env->cmdline_argv[i] == NULL)
  53                         goto out_free;
  54         }
  55
  56         env->nr_cmdline = argc;
  57
  58         return 0;
  59 out_free:
  60         zfree(&env->cmdline_argv);
  61 out_enomem:
  62         return -ENOMEM;
  63 }
  64
  65 int perf_env__read_cpu_topology_map(struct perf_env *env)
  66 {
  67         int cpu, nr_cpus;
  68
  69         if (env->cpu != NULL)
  70                 return 0;
  71
  72         if (env->nr_cpus_avail == 0)
  73                 env->nr_cpus_avail = cpu__max_present_cpu();
  74
  75         nr_cpus = env->nr_cpus_avail;
  76         if (nr_cpus == -1)
  77                 return -EINVAL;
  78
  79         env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
  80         if (env->cpu == NULL)
  81                 return -ENOMEM;
  82
  83         for (cpu = 0; cpu < nr_cpus; ++cpu) {
  84                 env->cpu[cpu].core_id   = cpu_map__get_core_id(cpu);
  85                 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
  86         }
  87
  88         env->nr_cpus_avail = nr_cpus;
  89         return 0;
  90 }
  91
  92 void cpu_cache_level__free(struct cpu_cache_level *cache)
  93 {
  94         free(cache->type);
  95         free(cache->map);
  96         free(cache->size);
  97 }
  98
  99 /*
 100  * Return architecture name in a normalized form.
 101  * The conversion logic comes from the Makefile.
 102  */
 103 static const char *normalize_arch(char *arch)
 104 {
 105         if (!strcmp(arch, "x86_64"))
 106                 return "x86";
 107         if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
 108                 return "x86";
 109         if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
 110                 return "sparc";
 111         if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
 112                 return "arm64";
 113         if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
 114                 return "arm";
 115         if (!strncmp(arch, "s390", 4))
 116                 return "s390";
 117         if (!strncmp(arch, "parisc", 6))
 118                 return "parisc";
 119         if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
 120                 return "powerpc";
 121         if (!strncmp(arch, "mips", 4))
 122                 return "mips";
 123         if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
 124                 return "sh";
 125
 126         return arch;
 127 }
 128
 129 const char *perf_env__arch(struct perf_env *env)
 130 {
 131         struct utsname uts;
 132         char *arch_name;
 133
 134         if (!env) { /* Assume local operation */
 135                 if (uname(&uts) < 0)
 136                         return NULL;
 137                 arch_name = uts.machine;
 138         } else
 139                 arch_name = env->arch;
 140
 141         return normalize_arch(arch_name);
 142 }