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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
   4  */
   5
   6
   7 #include <unistd.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <errno.h>
  11 #include <string.h>
  12 #include <getopt.h>
  13
  14 #include "helpers/helpers.h"
  15 #include "helpers/sysfs.h"
  16
  17 static struct option set_opts[] = {
  18      {"perf-bias", optional_argument, NULL, 'b'},
  19      { },
  20 };
  21
  22 static void print_wrong_arg_exit(void)
  23 {
  24         printf(_("invalid or unknown argument\n"));
  25         exit(EXIT_FAILURE);
  26 }
  27
  28 int cmd_info(int argc, char **argv)
  29 {
  30         extern char *optarg;
  31         extern int optind, opterr, optopt;
  32         unsigned int cpu;
  33
  34         union {
  35                 struct {
  36                         int perf_bias:1;
  37                 };
  38                 int params;
  39         } params = {};
  40         int ret = 0;
  41
  42         setlocale(LC_ALL, "");
  43         textdomain(PACKAGE);
  44
  45         /* parameter parsing */
  46         while ((ret = getopt_long(argc, argv, "b", set_opts, NULL)) != -1) {
  47                 switch (ret) {
  48                 case 'b':
  49                         if (params.perf_bias)
  50                                 print_wrong_arg_exit();
  51                         params.perf_bias = 1;
  52                         break;
  53                 default:
  54                         print_wrong_arg_exit();
  55                 }
  56         };
  57
  58         if (!params.params)
  59                 params.params = 0x7;
  60
  61         /* Default is: show output of CPU 0 only */
  62         if (bitmask_isallclear(cpus_chosen))
  63                 bitmask_setbit(cpus_chosen, 0);
  64
  65         /* Add more per cpu options here */
  66         if (!params.perf_bias)
  67                 return ret;
  68
  69         if (params.perf_bias) {
  70                 if (!run_as_root) {
  71                         params.perf_bias = 0;
  72                         printf(_("Intel's performance bias setting needs root privileges\n"));
  73                 } else if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) {
  74                         printf(_("System does not support Intel's performance"
  75                                  " bias setting\n"));
  76                         params.perf_bias = 0;
  77                 }
  78         }
  79
  80         /* loop over CPUs */
  81         for (cpu = bitmask_first(cpus_chosen);
  82              cpu <= bitmask_last(cpus_chosen); cpu++) {
  83
  84                 if (!bitmask_isbitset(cpus_chosen, cpu))
  85                         continue;
  86
  87                 printf(_("analyzing CPU %d:\n"), cpu);
  88
  89                 if (sysfs_is_cpu_online(cpu) != 1){
  90                         printf(_(" *is offline\n"));
  91                         continue;
  92                 }
  93
  94                 if (params.perf_bias) {
  95                         ret = msr_intel_get_perf_bias(cpu);
  96                         if (ret < 0) {
  97                                 fprintf(stderr,
  98                         _("Could not read perf-bias value[%d]\n"), ret);
  99                                 exit(EXIT_FAILURE);
 100                         } else
 101                                 printf(_("perf-bias: %d\n"), ret);
 102                 }
 103         }
 104         return 0;
 105 }