LXR linux/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
  18static struct option set_opts[] = {
  19     {"perf-bias", optional_argument, NULL, 'b'},
  20     { },
  21};
  22
  23static void print_wrong_arg_exit(void)
  24{
  25        printf(_("invalid or unknown argument\n"));
  26        exit(EXIT_FAILURE);
  27}
  28
  29int 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}
 107