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20#include <stdio.h>
21#include <stdlib.h>
22#include <stdarg.h>
23#include <string.h>
24#include <time.h>
25#include <dirent.h>
26
27#include <sys/utsname.h>
28#include <sys/types.h>
29#include <sys/stat.h>
30
31#include "parse.h"
32#include "config.h"
33
34
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39
40
41
42
43enum sched_prio string_to_prio(const char *str)
44{
45 if (strncasecmp("high", str, strlen(str)) == 0)
46 return SCHED_HIGH;
47 else if (strncasecmp("default", str, strlen(str)) == 0)
48 return SCHED_DEFAULT;
49 else if (strncasecmp("low", str, strlen(str)) == 0)
50 return SCHED_LOW;
51 else
52 return SCHED_ERR;
53}
54
55
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57
58
59
60
61
62
63
64FILE *prepare_output(const char *dirname)
65{
66 FILE *output = NULL;
67 int len;
68 char *filename, *filename_tmp;
69 struct utsname sysdata;
70 DIR *dir;
71
72 dir = opendir(dirname);
73 if (dir == NULL) {
74 if (mkdir(dirname, 0755)) {
75 perror("mkdir");
76 fprintf(stderr, "error: Cannot create dir %s\n",
77 dirname);
78 return NULL;
79 }
80 }
81
82 len = strlen(dirname) + 30;
83 filename = malloc(sizeof(char) * len);
84 if (!filename) {
85 perror("malloc");
86 goto out_dir;
87 }
88
89 if (uname(&sysdata) == 0) {
90 len += strlen(sysdata.nodename) + strlen(sysdata.release);
91 filename_tmp = realloc(filename, sizeof(*filename) * len);
92
93 if (filename_tmp == NULL) {
94 free(filename);
95 perror("realloc");
96 goto out_dir;
97 }
98
99 filename = filename_tmp;
100 snprintf(filename, len - 1, "%s/benchmark_%s_%s_%li.log",
101 dirname, sysdata.nodename, sysdata.release, time(NULL));
102 } else {
103 snprintf(filename, len - 1, "%s/benchmark_%li.log",
104 dirname, time(NULL));
105 }
106
107 dprintf("logilename: %s\n", filename);
108
109 output = fopen(filename, "w+");
110 if (output == NULL) {
111 perror("fopen");
112 fprintf(stderr, "error: unable to open logfile\n");
113 goto out;
114 }
115
116 fprintf(stdout, "Logfile: %s\n", filename);
117
118 fprintf(output, "#round load sleep performance powersave percentage\n");
119out:
120 free(filename);
121out_dir:
122 closedir(dir);
123 return output;
124}
125
126
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130
131
132
133struct config *prepare_default_config()
134{
135 struct config *config = malloc(sizeof(struct config));
136
137 dprintf("loading defaults\n");
138
139 config->sleep = 500000;
140 config->load = 500000;
141 config->sleep_step = 500000;
142 config->load_step = 500000;
143 config->cycles = 5;
144 config->rounds = 50;
145 config->cpu = 0;
146 config->prio = SCHED_HIGH;
147 config->verbose = 0;
148 strncpy(config->governor, "ondemand", 8);
149
150 config->output = stdout;
151
152#ifdef DEFAULT_CONFIG_FILE
153 if (prepare_config(DEFAULT_CONFIG_FILE, config))
154 return NULL;
155#endif
156 return config;
157}
158
159
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166
167
168int prepare_config(const char *path, struct config *config)
169{
170 size_t len = 0;
171 char opt[16], val[32], *line = NULL;
172 FILE *configfile;
173
174 if (config == NULL) {
175 fprintf(stderr, "error: config is NULL\n");
176 return 1;
177 }
178
179 configfile = fopen(path, "r");
180 if (configfile == NULL) {
181 perror("fopen");
182 fprintf(stderr, "error: unable to read configfile\n");
183 free(config);
184 return 1;
185 }
186
187 while (getline(&line, &len, configfile) != -1) {
188 if (line[0] == '#' || line[0] == ' ' || line[0] == '\n')
189 continue;
190
191 if (sscanf(line, "%14s = %30s", opt, val) < 2)
192 continue;
193
194 dprintf("parsing: %s -> %s\n", opt, val);
195
196 if (strcmp("sleep", opt) == 0)
197 sscanf(val, "%li", &config->sleep);
198
199 else if (strcmp("load", opt) == 0)
200 sscanf(val, "%li", &config->load);
201
202 else if (strcmp("load_step", opt) == 0)
203 sscanf(val, "%li", &config->load_step);
204
205 else if (strcmp("sleep_step", opt) == 0)
206 sscanf(val, "%li", &config->sleep_step);
207
208 else if (strcmp("cycles", opt) == 0)
209 sscanf(val, "%u", &config->cycles);
210
211 else if (strcmp("rounds", opt) == 0)
212 sscanf(val, "%u", &config->rounds);
213
214 else if (strcmp("verbose", opt) == 0)
215 sscanf(val, "%u", &config->verbose);
216
217 else if (strcmp("output", opt) == 0)
218 config->output = prepare_output(val);
219
220 else if (strcmp("cpu", opt) == 0)
221 sscanf(val, "%u", &config->cpu);
222
223 else if (strcmp("governor", opt) == 0) {
224 strncpy(config->governor, val,
225 sizeof(config->governor));
226 config->governor[sizeof(config->governor) - 1] = '\0';
227 }
228
229 else if (strcmp("priority", opt) == 0) {
230 if (string_to_prio(val) != SCHED_ERR)
231 config->prio = string_to_prio(val);
232 }
233 }
234
235 free(line);
236
237 return 0;
238}
239