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