tools/power/cpupower/utils/cpupower-info.c

   1 /*
   2  *  (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
   3  *
   4  *  Licensed under the terms of the GNU GPL License version 2.
   5  */
   6
   7
   8 #include <unistd.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <errno.h>
  12 #include <string.h>
  13 #include <getopt.h>
  14
  15 #include "helpers/helpers.h"
  16 #include "helpers/sysfs.h"
  17
  18 static struct option set_opts[] = {
  19      {"perf-bias", optional_argument, NULL, 'b'},
  20      { },
  21 };
  22
  23 static void print_wrong_arg_exit(void)
  24 {
  25         printf(_("invalid or unknown argument\n"));
  26         exit(EXIT_FAILURE);
  27 }
  28
  29 int cmd_info(int argc, char **argv)
  30 {
  31         extern char *optarg;
  32         extern int optind, opterr, optopt;
  33         unsigned int cpu;
  34
  35         union {
  36                 struct {
  37                         int perf_bias:1;
  38                 };
  39                 int params;
  40         } params = {};
  41         int ret = 0;
  42
  43         setlocale(LC_ALL, "");
  44         textdomain(PACKAGE);
  45
  46         /* parameter parsing */
  47         while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) {
  48                 switch (ret) {
  49                 case 'b':
  50                         if (params.perf_bias)
  51                                 print_wrong_arg_exit();
  52                         params.perf_bias = 1;
  53                         break;
  54                 default:
  55                         print_wrong_arg_exit();
  56                 }
  57         };
  58
  59         if (!params.params)
  60                 params.params = 0x7;
  61
  62         /* Default is: show output of CPU 0 only */
  63         if (bitmask_isallclear(cpus_chosen))
  64                 bitmask_setbit(cpus_chosen, 0);
  65
  66         /* Add more per cpu options here */
  67         if (!params.perf_bias)
  68                 return ret;
  69
  70         if (params.perf_bias) {
  71                 if (!run_as_root) {
  72                         params.perf_bias = 0;
  73                         printf(_("Intel's performance bias setting needs root privileges\n"));
  74                 } else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
  75                         printf(_("System does not support Intel's performance"
  76                                  " bias setting\n"));
  77                         params.perf_bias = 0;
  78                 }
  79         }
  80
  81         /* loop over CPUs */
  82         for (cpu = bitmask_first(cpus_chosen);
  83              cpu <= bitmask_last(cpus_chosen); cpu++) {
  84
  85                 if (!bitmask_isbitset(cpus_chosen, cpu))
  86                         continue;
  87
  88                 printf(_("analyzing CPU %d:\n"), cpu);
  89
  90                 if (sysfs_is_cpu_online(cpu) != 1){
  91                         printf(_(" *is offline\n"));
  92                         continue;
  93                 }
  94
  95                 if (params.perf_bias) {
  96                         ret = msr_intel_get_perf_bias(cpu);
  97                         if (ret < 0) {
  98                                 fprintf(stderr,
  99                         _("Could not read perf-bias value[%d]\n"), ret);
 100                                 exit(EXIT_FAILURE);
 101                         } else
 102                                 printf(_("perf-bias: %d\n"), ret);
 103                 }
 104         }
 105         return 0;
 106 }