tools/power/cpupower/bench/main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*  cpufreq-bench CPUFreq microbenchmark
   3  *
   4  *  Copyright (C) 2008 Christian Kornacker <ckornacker@suse.de>
   5  */
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11 #include <getopt.h>
  12 #include <errno.h>
  13
  14 #include "config.h"
  15 #include "system.h"
  16 #include "benchmark.h"
  17
  18 static struct option long_options[] = {
  19         {"output",      1,      0,      'o'},
  20         {"sleep",       1,      0,      's'},
  21         {"load",        1,      0,      'l'},
  22         {"verbose",     0,      0,      'v'},
  23         {"cpu",         1,      0,      'c'},
  24         {"governor",    1,      0,      'g'},
  25         {"prio",        1,      0,      'p'},
  26         {"file",        1,      0,      'f'},
  27         {"cycles",      1,      0,      'n'},
  28         {"rounds",      1,      0,      'r'},
  29         {"load-step",   1,      0,      'x'},
  30         {"sleep-step",  1,      0,      'y'},
  31         {"help",        0,      0,      'h'},
  32         {0, 0, 0, 0}
  33 };
  34
  35 /*******************************************************************
  36  usage
  37 *******************************************************************/
  38
  39 void usage()
  40 {
  41         printf("usage: ./bench\n");
  42         printf("Options:\n");
  43         printf(" -l, --load=<long int>\t\tinitial load time in us\n");
  44         printf(" -s, --sleep=<long int>\t\tinitial sleep time in us\n");
  45         printf(" -x, --load-step=<long int>\ttime to be added to load time, in us\n");
  46         printf(" -y, --sleep-step=<long int>\ttime to be added to sleep time, in us\n");
  47         printf(" -c, --cpu=<cpu #>\t\t\tCPU Nr. to use, starting at 0\n");
  48         printf(" -p, --prio=<priority>\t\t\tscheduler priority, HIGH, LOW or DEFAULT\n");
  49         printf(" -g, --governor=<governor>\t\tcpufreq governor to test\n");
  50         printf(" -n, --cycles=<int>\t\t\tload/sleep cycles\n");
  51         printf(" -r, --rounds<int>\t\t\tload/sleep rounds\n");
  52         printf(" -f, --file=<configfile>\t\tconfig file to use\n");
  53         printf(" -o, --output=<dir>\t\t\toutput path. Filename will be OUTPUTPATH/benchmark_TIMESTAMP.log\n");
  54         printf(" -v, --verbose\t\t\t\tverbose output on/off\n");
  55         printf(" -h, --help\t\t\t\tPrint this help screen\n");
  56         exit(1);
  57 }
  58
  59 /*******************************************************************
  60  main
  61 *******************************************************************/
  62
  63 int main(int argc, char **argv)
  64 {
  65         int c;
  66         int option_index = 0;
  67         struct config *config = NULL;
  68
  69         config = prepare_default_config();
  70
  71         if (config == NULL)
  72                 return EXIT_FAILURE;
  73
  74         while (1) {
  75                 c = getopt_long (argc, argv, "hg:o:s:l:vc:p:f:n:r:x:y:",
  76                                 long_options, &option_index);
  77                 if (c == -1)
  78                         break;
  79
  80                 switch (c) {
  81                 case 'o':
  82                         if (config->output != NULL)
  83                                 fclose(config->output);
  84
  85                         config->output = prepare_output(optarg);
  86
  87                         if (config->output == NULL)
  88                                 return EXIT_FAILURE;
  89
  90                         dprintf("user output path -> %s\n", optarg);
  91                         break;
  92                 case 's':
  93                         sscanf(optarg, "%li", &config->sleep);
  94                         dprintf("user sleep time -> %s\n", optarg);
  95                         break;
  96                 case 'l':
  97                         sscanf(optarg, "%li", &config->load);
  98                         dprintf("user load time -> %s\n", optarg);
  99                         break;
 100                 case 'c':
 101                         sscanf(optarg, "%u", &config->cpu);
 102                         dprintf("user cpu -> %s\n", optarg);
 103                         break;
 104                 case 'g':
 105                         strncpy(config->governor, optarg, 14);
 106                         dprintf("user governor -> %s\n", optarg);
 107                         break;
 108                 case 'p':
 109                         if (string_to_prio(optarg) != SCHED_ERR) {
 110                                 config->prio = string_to_prio(optarg);
 111                                 dprintf("user prio -> %s\n", optarg);
 112                         } else {
 113                                 if (config != NULL) {
 114                                         if (config->output != NULL)
 115                                                 fclose(config->output);
 116                                         free(config);
 117                                 }
 118                                 usage();
 119                         }
 120                         break;
 121                 case 'n':
 122                         sscanf(optarg, "%u", &config->cycles);
 123                         dprintf("user cycles -> %s\n", optarg);
 124                         break;
 125                 case 'r':
 126                         sscanf(optarg, "%u", &config->rounds);
 127                         dprintf("user rounds -> %s\n", optarg);
 128                         break;
 129                 case 'x':
 130                         sscanf(optarg, "%li", &config->load_step);
 131                         dprintf("user load_step -> %s\n", optarg);
 132                         break;
 133                 case 'y':
 134                         sscanf(optarg, "%li", &config->sleep_step);
 135                         dprintf("user sleep_step -> %s\n", optarg);
 136                         break;
 137                 case 'f':
 138                         if (prepare_config(optarg, config))
 139                                 return EXIT_FAILURE;
 140                         break;
 141                 case 'v':
 142                         config->verbose = 1;
 143                         dprintf("verbose output enabled\n");
 144                         break;
 145                 case 'h':
 146                 case '?':
 147                 default:
 148                         if (config != NULL) {
 149                                 if (config->output != NULL)
 150                                         fclose(config->output);
 151                                 free(config);
 152                         }
 153                         usage();
 154                 }
 155         }
 156
 157         if (config->verbose) {
 158                 printf("starting benchmark with parameters:\n");
 159                 printf("config:\n\t"
 160                        "sleep=%li\n\t"
 161                        "load=%li\n\t"
 162                        "sleep_step=%li\n\t"
 163                        "load_step=%li\n\t"
 164                        "cpu=%u\n\t"
 165                        "cycles=%u\n\t"
 166                        "rounds=%u\n\t"
 167                        "governor=%s\n\n",
 168                        config->sleep,
 169                        config->load,
 170                        config->sleep_step,
 171                        config->load_step,
 172                        config->cpu,
 173                        config->cycles,
 174                        config->rounds,
 175                        config->governor);
 176         }
 177
 178         prepare_user(config);
 179         prepare_system(config);
 180         start_benchmark(config);
 181
 182         if (config->output != stdout)
 183                 fclose(config->output);
 184
 185         free(config);
 186
 187         return EXIT_SUCCESS;
 188 }
 189