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

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  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 
203 

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