diff options
Diffstat (limited to 'tools/power/cpupower/bench/parse.c')
| -rw-r--r-- | tools/power/cpupower/bench/parse.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/tools/power/cpupower/bench/parse.c b/tools/power/cpupower/bench/parse.c new file mode 100644 index 000000000..9ba8a44ad --- /dev/null +++ b/tools/power/cpupower/bench/parse.c @@ -0,0 +1,238 @@ +/* cpufreq-bench CPUFreq microbenchmark + * + * Copyright (C) 2008 Christian Kornacker <ckornacker@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#include <time.h> +#include <dirent.h> + +#include <sys/utsname.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "parse.h" +#include "config.h" + +/** + * converts priority string to priority + * + * @param str string that represents a scheduler priority + * + * @retval priority + * @retval SCHED_ERR when the priority doesn't exit + **/ + +enum sched_prio string_to_prio(const char *str) +{ + if (strncasecmp("high", str, strlen(str)) == 0) + return SCHED_HIGH; + else if (strncasecmp("default", str, strlen(str)) == 0) + return SCHED_DEFAULT; + else if (strncasecmp("low", str, strlen(str)) == 0) + return SCHED_LOW; + else + return SCHED_ERR; +} + +/** + * create and open logfile + * + * @param dir directory in which the logfile should be created + * + * @retval logfile on success + * @retval NULL when the file can't be created + **/ + +FILE *prepare_output(const char *dirname) +{ + FILE *output = NULL; + int len; + char *filename, *filename_tmp; + struct utsname sysdata; + DIR *dir; + + dir = opendir(dirname); + if (dir == NULL) { + if (mkdir(dirname, 0755)) { + perror("mkdir"); + fprintf(stderr, "error: Cannot create dir %s\n", + dirname); + return NULL; + } + } + + len = strlen(dirname) + 30; + filename = malloc(sizeof(char) * len); + if (!filename) { + perror("malloc"); + goto out_dir; + } + + if (uname(&sysdata) == 0) { + len += strlen(sysdata.nodename) + strlen(sysdata.release); + filename_tmp = realloc(filename, sizeof(*filename) * len); + + if (filename_tmp == NULL) { + free(filename); + perror("realloc"); + goto out_dir; + } + + filename = filename_tmp; + snprintf(filename, len - 1, "%s/benchmark_%s_%s_%li.log", + dirname, sysdata.nodename, sysdata.release, time(NULL)); + } else { + snprintf(filename, len - 1, "%s/benchmark_%li.log", + dirname, time(NULL)); + } + + dprintf("logfilename: %s\n", filename); + + output = fopen(filename, "w+"); + if (output == NULL) { + perror("fopen"); + fprintf(stderr, "error: unable to open logfile\n"); + goto out; + } + + fprintf(stdout, "Logfile: %s\n", filename); + + fprintf(output, "#round load sleep performance powersave percentage\n"); +out: + free(filename); +out_dir: + closedir(dir); + return output; +} + +/** + * returns the default config + * + * @retval default config on success + * @retval NULL when the output file can't be created + **/ + +struct config *prepare_default_config() +{ + struct config *config = malloc(sizeof(struct config)); + + dprintf("loading defaults\n"); + + config->sleep = 500000; + config->load = 500000; + config->sleep_step = 500000; + config->load_step = 500000; + config->cycles = 5; + config->rounds = 50; + config->cpu = 0; + config->prio = SCHED_HIGH; + config->verbose = 0; + strncpy(config->governor, "ondemand", 8); + + config->output = stdout; + +#ifdef DEFAULT_CONFIG_FILE + if (prepare_config(DEFAULT_CONFIG_FILE, config)) + return NULL; +#endif + return config; +} + +/** + * parses config file and returns the config to the caller + * + * @param path config file name + * + * @retval 1 on error + * @retval 0 on success + **/ + +int prepare_config(const char *path, struct config *config) +{ + size_t len = 0; + char opt[16], val[32], *line = NULL; + FILE *configfile; + + if (config == NULL) { + fprintf(stderr, "error: config is NULL\n"); + return 1; + } + + configfile = fopen(path, "r"); + if (configfile == NULL) { + perror("fopen"); + fprintf(stderr, "error: unable to read configfile\n"); + free(config); + return 1; + } + + while (getline(&line, &len, configfile) != -1) { + if (line[0] == '#' || line[0] == ' ' || line[0] == '\n') + continue; + + if (sscanf(line, "%14s = %30s", opt, val) < 2) + continue; + + dprintf("parsing: %s -> %s\n", opt, val); + + if (strcmp("sleep", opt) == 0) + sscanf(val, "%li", &config->sleep); + + else if (strcmp("load", opt) == 0) + sscanf(val, "%li", &config->load); + + else if (strcmp("load_step", opt) == 0) + sscanf(val, "%li", &config->load_step); + + else if (strcmp("sleep_step", opt) == 0) + sscanf(val, "%li", &config->sleep_step); + + else if (strcmp("cycles", opt) == 0) + sscanf(val, "%u", &config->cycles); + + else if (strcmp("rounds", opt) == 0) + sscanf(val, "%u", &config->rounds); + + else if (strcmp("verbose", opt) == 0) + sscanf(val, "%u", &config->verbose); + + else if (strcmp("output", opt) == 0) + config->output = prepare_output(val); + + else if (strcmp("cpu", opt) == 0) + sscanf(val, "%u", &config->cpu); + + else if (strcmp("governor", opt) == 0) { + strncpy(config->governor, val, + sizeof(config->governor)); + config->governor[sizeof(config->governor) - 1] = '\0'; + } + + else if (strcmp("priority", opt) == 0) { + if (string_to_prio(val) != SCHED_ERR) + config->prio = string_to_prio(val); + } + } + + free(line); + + return 0; +} |