kernel/tools/power/cpupower/utils/cpuidle-set.c

   1 #include <unistd.h>
   2 #include <stdio.h>
   3 #include <errno.h>
   4 #include <stdlib.h>
   5 #include <limits.h>
   6 #include <string.h>
   7 #include <ctype.h>
   8
   9 #include <getopt.h>
  10
  11 #include "cpufreq.h"
  12 #include "helpers/helpers.h"
  13 #include "helpers/sysfs.h"
  14
  15 static struct option info_opts[] = {
  16      {"disable",        required_argument,              NULL, 'd'},
  17      {"enable",         required_argument,              NULL, 'e'},
  18      {"disable-by-latency", required_argument,          NULL, 'D'},
  19      {"enable-all",     no_argument,                    NULL, 'E'},
  20      { },
  21 };
  22
  23
  24 int cmd_idle_set(int argc, char **argv)
  25 {
  26         extern char *optarg;
  27         extern int optind, opterr, optopt;
  28         int ret = 0, cont = 1, param = 0, disabled;
  29         unsigned long long latency = 0, state_latency;
  30         unsigned int cpu = 0, idlestate = 0, idlestates = 0;
  31         char *endptr;
  32
  33         do {
  34                 ret = getopt_long(argc, argv, "d:e:ED:", info_opts, NULL);
  35                 if (ret == -1)
  36                         break;
  37                 switch (ret) {
  38                 case '?':
  39                         param = '?';
  40                         cont = 0;
  41                         break;
  42                 case 'd':
  43                         if (param) {
  44                                 param = -1;
  45                                 cont = 0;
  46                                 break;
  47                         }
  48                         param = ret;
  49                         idlestate = atoi(optarg);
  50                         break;
  51                 case 'e':
  52                         if (param) {
  53                                 param = -1;
  54                                 cont = 0;
  55                                 break;
  56                         }
  57                         param = ret;
  58                         idlestate = atoi(optarg);
  59                         break;
  60                 case 'D':
  61                         if (param) {
  62                                 param = -1;
  63                                 cont = 0;
  64                                 break;
  65                         }
  66                         param = ret;
  67                         latency = strtoull(optarg, &endptr, 10);
  68                         if (*endptr != '\0') {
  69                                 printf(_("Bad latency value: %s\n"), optarg);
  70                                 exit(EXIT_FAILURE);
  71                         }
  72                         break;
  73                 case 'E':
  74                         if (param) {
  75                                 param = -1;
  76                                 cont = 0;
  77                                 break;
  78                         }
  79                         param = ret;
  80                         break;
  81                 case -1:
  82                         cont = 0;
  83                         break;
  84                 }
  85         } while (cont);
  86
  87         switch (param) {
  88         case -1:
  89                 printf(_("You can't specify more than one "
  90                          "output-specific argument\n"));
  91                 exit(EXIT_FAILURE);
  92         case '?':
  93                 printf(_("invalid or unknown argument\n"));
  94                 exit(EXIT_FAILURE);
  95         }
  96
  97         /* Default is: set all CPUs */
  98         if (bitmask_isallclear(cpus_chosen))
  99                 bitmask_setall(cpus_chosen);
 100
 101         for (cpu = bitmask_first(cpus_chosen);
 102              cpu <= bitmask_last(cpus_chosen); cpu++) {
 103
 104                 if (!bitmask_isbitset(cpus_chosen, cpu))
 105                         continue;
 106
 107                 if (sysfs_is_cpu_online(cpu) != 1)
 108                         continue;
 109
 110                 idlestates = sysfs_get_idlestate_count(cpu);
 111                 if (idlestates <= 0)
 112                         continue;
 113
 114                 switch (param) {
 115                 case 'd':
 116                         ret = sysfs_idlestate_disable(cpu, idlestate, 1);
 117                         if (ret == 0)
 118                 printf(_("Idlestate %u disabled on CPU %u\n"),  idlestate, cpu);
 119                         else if (ret == -1)
 120                 printf(_("Idlestate %u not available on CPU %u\n"),
 121                        idlestate, cpu);
 122                         else if (ret == -2)
 123                 printf(_("Idlestate disabling not supported by kernel\n"));
 124                         else
 125                 printf(_("Idlestate %u not disabled on CPU %u\n"),
 126                        idlestate, cpu);
 127                         break;
 128                 case 'e':
 129                         ret = sysfs_idlestate_disable(cpu, idlestate, 0);
 130                         if (ret == 0)
 131                 printf(_("Idlestate %u enabled on CPU %u\n"),  idlestate, cpu);
 132                         else if (ret == -1)
 133                 printf(_("Idlestate %u not available on CPU %u\n"),
 134                        idlestate, cpu);
 135                         else if (ret == -2)
 136                 printf(_("Idlestate enabling not supported by kernel\n"));
 137                         else
 138                 printf(_("Idlestate %u not enabled on CPU %u\n"),
 139                        idlestate, cpu);
 140                         break;
 141                 case 'D':
 142                         for (idlestate = 0; idlestate < idlestates; idlestate++) {
 143                                 disabled = sysfs_is_idlestate_disabled
 144                                         (cpu, idlestate);
 145                                 state_latency = sysfs_get_idlestate_latency
 146                                         (cpu, idlestate);
 147                                 if (disabled == 1) {
 148                                         if (latency > state_latency){
 149                                                 ret = sysfs_idlestate_disable
 150                                                         (cpu, idlestate, 0);
 151                                                 if (ret == 0)
 152                 printf(_("Idlestate %u enabled on CPU %u\n"),  idlestate, cpu);
 153                                         }
 154                                         continue;
 155                                 }
 156                                 if (latency <= state_latency){
 157                                         ret = sysfs_idlestate_disable
 158                                                 (cpu, idlestate, 1);
 159                                         if (ret == 0)
 160                 printf(_("Idlestate %u disabled on CPU %u\n"), idlestate, cpu);
 161                                 }
 162                         }
 163                         break;
 164                 case 'E':
 165                         for (idlestate = 0; idlestate < idlestates; idlestate++) {
 166                                 disabled = sysfs_is_idlestate_disabled
 167                                         (cpu, idlestate);
 168                                 if (disabled == 1) {
 169                                         ret = sysfs_idlestate_disable
 170                                                 (cpu, idlestate, 0);
 171                                         if (ret == 0)
 172                 printf(_("Idlestate %u enabled on CPU %u\n"), idlestate, cpu);
 173                                 }
 174                         }
 175                         break;
 176                 default:
 177                         /* Not reachable with proper args checking */
 178                         printf(_("Invalid or unknown argument\n"));
 179                         exit(EXIT_FAILURE);
 180                         break;
 181                 }
 182         }
 183         return EXIT_SUCCESS;
 184 }