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

   1 /*
   2  *  (C) 2004-2009  Dominik Brodowski <linux@dominikbrodowski.de>
   3  *  (C) 2010       Thomas Renninger <trenn@suse.de>
   4  *
   5  *  Licensed under the terms of the GNU GPL License version 2.
   6  */
   7
   8
   9 #include <unistd.h>
  10 #include <stdio.h>
  11 #include <errno.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <getopt.h>
  15 #include <cpufreq.h>
  16
  17 #include "helpers/helpers.h"
  18 #include "helpers/sysfs.h"
  19 #include "helpers/bitmask.h"
  20
  21 #define LINE_LEN 10
  22
  23 static void cpuidle_cpu_output(unsigned int cpu, int verbose)
  24 {
  25         int idlestates, idlestate;
  26         char *tmp;
  27
  28         printf(_ ("Analyzing CPU %d:\n"), cpu);
  29
  30         idlestates = sysfs_get_idlestate_count(cpu);
  31         if (idlestates == 0) {
  32                 printf(_("CPU %u: No idle states\n"), cpu);
  33                 return;
  34         } else if (idlestates <= 0) {
  35                 printf(_("CPU %u: Can't read idle state info\n"), cpu);
  36                 return;
  37         }
  38         tmp = sysfs_get_idlestate_name(cpu, idlestates - 1);
  39         if (!tmp) {
  40                 printf(_("Could not determine max idle state %u\n"),
  41                        idlestates - 1);
  42                 return;
  43         }
  44
  45         printf(_("Number of idle states: %d\n"), idlestates);
  46
  47         printf(_("Available idle states:"));
  48         for (idlestate = 1; idlestate < idlestates; idlestate++) {
  49                 tmp = sysfs_get_idlestate_name(cpu, idlestate);
  50                 if (!tmp)
  51                         continue;
  52                 printf(" %s", tmp);
  53                 free(tmp);
  54         }
  55         printf("\n");
  56
  57         if (!verbose)
  58                 return;
  59
  60         for (idlestate = 1; idlestate < idlestates; idlestate++) {
  61                 tmp = sysfs_get_idlestate_name(cpu, idlestate);
  62                 if (!tmp)
  63                         continue;
  64                 printf("%s:\n", tmp);
  65                 free(tmp);
  66
  67                 tmp = sysfs_get_idlestate_desc(cpu, idlestate);
  68                 if (!tmp)
  69                         continue;
  70                 printf(_("Flags/Description: %s\n"), tmp);
  71                 free(tmp);
  72
  73                 printf(_("Latency: %lu\n"),
  74                        sysfs_get_idlestate_latency(cpu, idlestate));
  75                 printf(_("Usage: %lu\n"),
  76                        sysfs_get_idlestate_usage(cpu, idlestate));
  77                 printf(_("Duration: %llu\n"),
  78                        sysfs_get_idlestate_time(cpu, idlestate));
  79         }
  80         printf("\n");
  81 }
  82
  83 static void cpuidle_general_output(void)
  84 {
  85         char *tmp;
  86
  87         tmp = sysfs_get_cpuidle_driver();
  88         if (!tmp) {
  89                 printf(_("Could not determine cpuidle driver\n"));
  90                 return;
  91         }
  92
  93         printf(_("CPUidle driver: %s\n"), tmp);
  94         free(tmp);
  95
  96         tmp = sysfs_get_cpuidle_governor();
  97         if (!tmp) {
  98                 printf(_("Could not determine cpuidle governor\n"));
  99                 return;
 100         }
 101
 102         printf(_("CPUidle governor: %s\n"), tmp);
 103         free(tmp);
 104 }
 105
 106 static void proc_cpuidle_cpu_output(unsigned int cpu)
 107 {
 108         long max_allowed_cstate = 2000000000;
 109         int cstates, cstate;
 110
 111         cstates = sysfs_get_idlestate_count(cpu);
 112         if (cstates == 0) {
 113                 /*
 114                  * Go on and print same useless info as you'd see with
 115                  * cat /proc/acpi/processor/../power
 116                  *      printf(_("CPU %u: No C-states available\n"), cpu);
 117                  *      return;
 118                  */
 119         } else if (cstates <= 0) {
 120                 printf(_("CPU %u: Can't read C-state info\n"), cpu);
 121                 return;
 122         }
 123         /* printf("Cstates: %d\n", cstates); */
 124
 125         printf(_("active state:            C0\n"));
 126         printf(_("max_cstate:              C%u\n"), cstates-1);
 127         printf(_("maximum allowed latency: %lu usec\n"), max_allowed_cstate);
 128         printf(_("states:\t\n"));
 129         for (cstate = 1; cstate < cstates; cstate++) {
 130                 printf(_("    C%d:                  "
 131                          "type[C%d] "), cstate, cstate);
 132                 printf(_("promotion[--] demotion[--] "));
 133                 printf(_("latency[%03lu] "),
 134                        sysfs_get_idlestate_latency(cpu, cstate));
 135                 printf(_("usage[%08lu] "),
 136                        sysfs_get_idlestate_usage(cpu, cstate));
 137                 printf(_("duration[%020Lu] \n"),
 138                        sysfs_get_idlestate_time(cpu, cstate));
 139         }
 140 }
 141
 142 static struct option info_opts[] = {
 143         { .name = "silent",     .has_arg = no_argument, .flag = NULL,   .val = 's'},
 144         { .name = "proc",       .has_arg = no_argument, .flag = NULL,   .val = 'o'},
 145         { },
 146 };
 147
 148 static inline void cpuidle_exit(int fail)
 149 {
 150         exit(EXIT_FAILURE);
 151 }
 152
 153 int cmd_idle_info(int argc, char **argv)
 154 {
 155         extern char *optarg;
 156         extern int optind, opterr, optopt;
 157         int ret = 0, cont = 1, output_param = 0, verbose = 1;
 158         unsigned int cpu = 0;
 159
 160         do {
 161                 ret = getopt_long(argc, argv, "os", info_opts, NULL);
 162                 if (ret == -1)
 163                         break;
 164                 switch (ret) {
 165                 case '?':
 166                         output_param = '?';
 167                         cont = 0;
 168                         break;
 169                 case 's':
 170                         verbose = 0;
 171                         break;
 172                 case -1:
 173                         cont = 0;
 174                         break;
 175                 case 'o':
 176                         if (output_param) {
 177                                 output_param = -1;
 178                                 cont = 0;
 179                                 break;
 180                         }
 181                         output_param = ret;
 182                         break;
 183                 }
 184         } while (cont);
 185
 186         switch (output_param) {
 187         case -1:
 188                 printf(_("You can't specify more than one "
 189                          "output-specific argument\n"));
 190                 cpuidle_exit(EXIT_FAILURE);
 191         case '?':
 192                 printf(_("invalid or unknown argument\n"));
 193                 cpuidle_exit(EXIT_FAILURE);
 194         }
 195
 196         /* Default is: show output of CPU 0 only */
 197         if (bitmask_isallclear(cpus_chosen))
 198                 bitmask_setbit(cpus_chosen, 0);
 199
 200         if (output_param == 0)
 201                 cpuidle_general_output();
 202
 203         for (cpu = bitmask_first(cpus_chosen);
 204              cpu <= bitmask_last(cpus_chosen); cpu++) {
 205
 206                 if (!bitmask_isbitset(cpus_chosen, cpu) ||
 207                     cpufreq_cpu_exists(cpu))
 208                         continue;
 209
 210                 switch (output_param) {
 211
 212                 case 'o':
 213                         proc_cpuidle_cpu_output(cpu);
 214                         break;
 215                 case 0:
 216                         printf("\n");
 217                         cpuidle_cpu_output(cpu, verbose);
 218                         break;
 219                 }
 220         }
 221         return EXIT_SUCCESS;
 222 }