kernel/tools/power/cpupower/bench/main.c

   1 /*  cpufreq-bench CPUFreq microbenchmark
   2  *
   3  *  Copyright (C) 2008 Christian Kornacker <ckornacker@suse.de>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <getopt.h>
  25 #include <errno.h>
  26
  27 #include "config.h"
  28 #include "system.h"
  29 #include "benchmark.h"
  30
  31 static struct option long_options[] = {
  32         {"output",      1,      0,      'o'},
  33         {"sleep",       1,      0,      's'},
  34         {"load",        1,      0,      'l'},
  35         {"verbose",     0,      0,      'v'},
  36         {"cpu",         1,      0,      'c'},
  37         {"governor",    1,      0,      'g'},
  38         {"prio",        1,      0,      'p'},
  39         {"file",        1,      0,      'f'},
  40         {"cycles",      1,      0,      'n'},
  41         {"rounds",      1,      0,      'r'},
  42         {"load-step",   1,      0,      'x'},
  43         {"sleep-step",  1,      0,      'y'},
  44         {"help",        0,      0,      'h'},
  45         {0, 0, 0, 0}
  46 };
  47
  48 /*******************************************************************
  49  usage
  50 *******************************************************************/
  51
  52 void usage()
  53 {
  54         printf("usage: ./bench\n");
  55         printf("Options:\n");
  56         printf(" -l, --load=<long int>\t\tinitial load time in us\n");
  57         printf(" -s, --sleep=<long int>\t\tinitial sleep time in us\n");
  58         printf(" -x, --load-step=<long int>\ttime to be added to load time, in us\n");
  59         printf(" -y, --sleep-step=<long int>\ttime to be added to sleep time, in us\n");
  60         printf(" -c, --cpu=<cpu #>\t\t\tCPU Nr. to use, starting at 0\n");
  61         printf(" -p, --prio=<priority>\t\t\tscheduler priority, HIGH, LOW or DEFAULT\n");
  62         printf(" -g, --governor=<governor>\t\tcpufreq governor to test\n");
  63         printf(" -n, --cycles=<int>\t\t\tload/sleep cycles\n");
  64         printf(" -r, --rounds<int>\t\t\tload/sleep rounds\n");
  65         printf(" -f, --file=<configfile>\t\tconfig file to use\n");
  66         printf(" -o, --output=<dir>\t\t\toutput path. Filename will be OUTPUTPATH/benchmark_TIMESTAMP.log\n");
  67         printf(" -v, --verbose\t\t\t\tverbose output on/off\n");
  68         printf(" -h, --help\t\t\t\tPrint this help screen\n");
  69         exit(1);
  70 }
  71
  72 /*******************************************************************
  73  main
  74 *******************************************************************/
  75
  76 int main(int argc, char **argv)
  77 {
  78         int c;
  79         int option_index = 0;
  80         struct config *config = NULL;
  81
  82         config = prepare_default_config();
  83
  84         if (config == NULL)
  85                 return EXIT_FAILURE;
  86
  87         while (1) {
  88                 c = getopt_long (argc, argv, "hg:o:s:l:vc:p:f:n:r:x:y:",
  89                                 long_options, &option_index);
  90                 if (c == -1)
  91                         break;
  92
  93                 switch (c) {
  94                 case 'o':
  95                         if (config->output != NULL)
  96                                 fclose(config->output);
  97
  98                         config->output = prepare_output(optarg);
  99
 100                         if (config->output == NULL)
 101                                 return EXIT_FAILURE;
 102
 103                         dprintf("user output path -> %s\n", optarg);
 104                         break;
 105                 case 's':
 106                         sscanf(optarg, "%li", &config->sleep);
 107                         dprintf("user sleep time -> %s\n", optarg);
 108                         break;
 109                 case 'l':
 110                         sscanf(optarg, "%li", &config->load);
 111                         dprintf("user load time -> %s\n", optarg);
 112                         break;
 113                 case 'c':
 114                         sscanf(optarg, "%u", &config->cpu);
 115                         dprintf("user cpu -> %s\n", optarg);
 116                         break;
 117                 case 'g':
 118                         strncpy(config->governor, optarg, 14);
 119                         dprintf("user governor -> %s\n", optarg);
 120                         break;
 121                 case 'p':
 122                         if (string_to_prio(optarg) != SCHED_ERR) {
 123                                 config->prio = string_to_prio(optarg);
 124                                 dprintf("user prio -> %s\n", optarg);
 125                         } else {
 126                                 if (config != NULL) {
 127                                         if (config->output != NULL)
 128                                                 fclose(config->output);
 129                                         free(config);
 130                                 }
 131                                 usage();
 132                         }
 133                         break;
 134                 case 'n':
 135                         sscanf(optarg, "%u", &config->cycles);
 136                         dprintf("user cycles -> %s\n", optarg);
 137                         break;
 138                 case 'r':
 139                         sscanf(optarg, "%u", &config->rounds);
 140                         dprintf("user rounds -> %s\n", optarg);
 141                         break;
 142                 case 'x':
 143                         sscanf(optarg, "%li", &config->load_step);
 144                         dprintf("user load_step -> %s\n", optarg);
 145                         break;
 146                 case 'y':
 147                         sscanf(optarg, "%li", &config->sleep_step);
 148                         dprintf("user sleep_step -> %s\n", optarg);
 149                         break;
 150                 case 'f':
 151                         if (prepare_config(optarg, config))
 152                                 return EXIT_FAILURE;
 153                         break;
 154                 case 'v':
 155                         config->verbose = 1;
 156                         dprintf("verbose output enabled\n");
 157                         break;
 158                 case 'h':
 159                 case '?':
 160                 default:
 161                         if (config != NULL) {
 162                                 if (config->output != NULL)
 163                                         fclose(config->output);
 164                                 free(config);
 165                         }
 166                         usage();
 167                 }
 168         }
 169
 170         if (config->verbose) {
 171                 printf("starting benchmark with parameters:\n");
 172                 printf("config:\n\t"
 173                        "sleep=%li\n\t"
 174                        "load=%li\n\t"
 175                        "sleep_step=%li\n\t"
 176                        "load_step=%li\n\t"
 177                        "cpu=%u\n\t"
 178                        "cycles=%u\n\t"
 179                        "rounds=%u\n\t"
 180                        "governor=%s\n\n",
 181                        config->sleep,
 182                        config->load,
 183                        config->sleep_step,
 184                        config->load_step,
 185                        config->cpu,
 186                        config->cycles,
 187                        config->rounds,
 188                        config->governor);
 189         }
 190
 191         prepare_user(config);
 192         prepare_system(config);
 193         start_benchmark(config);
 194
 195         if (config->output != stdout)
 196                 fclose(config->output);
 197
 198         free(config);
 199
 200         return EXIT_SUCCESS;
 201 }
 202