tools/perf/util/env.c

   1 #include "cpumap.h"
   2 #include "env.h"
   3 #include "util.h"
   4
   5 struct perf_env perf_env;
   6
   7 void perf_env__exit(struct perf_env *env)
   8 {
   9         zfree(&env->hostname);
  10         zfree(&env->os_release);
  11         zfree(&env->version);
  12         zfree(&env->arch);
  13         zfree(&env->cpu_desc);
  14         zfree(&env->cpuid);
  15         zfree(&env->cmdline);
  16         zfree(&env->cmdline_argv);
  17         zfree(&env->sibling_cores);
  18         zfree(&env->sibling_threads);
  19         zfree(&env->numa_nodes);
  20         zfree(&env->pmu_mappings);
  21         zfree(&env->cpu);
  22 }
  23
  24 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
  25 {
  26         int i;
  27
  28         /*
  29          * If env->cmdline_argv has already been set, do not override it.  This allows
  30          * a command to set the cmdline, parse args and then call another
  31          * builtin function that implements a command -- e.g, cmd_kvm calling
  32          * cmd_record.
  33          */
  34         if (env->cmdline_argv != NULL)
  35                 return 0;
  36
  37         /* do not include NULL termination */
  38         env->cmdline_argv = calloc(argc, sizeof(char *));
  39         if (env->cmdline_argv == NULL)
  40                 goto out_enomem;
  41
  42         /*
  43          * Must copy argv contents because it gets moved around during option
  44          * parsing:
  45          */
  46         for (i = 0; i < argc ; i++) {
  47                 env->cmdline_argv[i] = argv[i];
  48                 if (env->cmdline_argv[i] == NULL)
  49                         goto out_free;
  50         }
  51
  52         env->nr_cmdline = argc;
  53
  54         return 0;
  55 out_free:
  56         zfree(&env->cmdline_argv);
  57 out_enomem:
  58         return -ENOMEM;
  59 }
  60
  61 int perf_env__read_cpu_topology_map(struct perf_env *env)
  62 {
  63         int cpu, nr_cpus;
  64
  65         if (env->cpu != NULL)
  66                 return 0;
  67
  68         if (env->nr_cpus_avail == 0)
  69                 env->nr_cpus_avail = sysconf(_SC_NPROCESSORS_CONF);
  70
  71         nr_cpus = env->nr_cpus_avail;
  72         if (nr_cpus == -1)
  73                 return -EINVAL;
  74
  75         env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
  76         if (env->cpu == NULL)
  77                 return -ENOMEM;
  78
  79         for (cpu = 0; cpu < nr_cpus; ++cpu) {
  80                 env->cpu[cpu].core_id   = cpu_map__get_core_id(cpu);
  81                 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
  82         }
  83
  84         env->nr_cpus_avail = nr_cpus;
  85         return 0;
  86 }