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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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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
56
57
58
59
60
61
62
63
64FILE *prepare_output(const char *dirname)
65{
66 FILE *output = NULL;
67 int len;
68 char *filename;
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
85 if (uname(&sysdata) == 0) {
86 len += strlen(sysdata.nodename) + strlen(sysdata.release);
87 filename = realloc(filename, sizeof(char) * len);
88
89 if (filename == NULL) {
90 perror("realloc");
91 return NULL;
92 }
93
94 snprintf(filename, len - 1, "%s/benchmark_%s_%s_%li.log",
95 dirname, sysdata.nodename, sysdata.release, time(NULL));
96 } else {
97 snprintf(filename, len - 1, "%s/benchmark_%li.log",
98 dirname, time(NULL));
99 }
100
101 dprintf("logilename: %s\n", filename);
102
103 output = fopen(filename, "w+");
104 if (output == NULL) {
105 perror("fopen");
106 fprintf(stderr, "error: unable to open logfile\n");
107 }
108
109 fprintf(stdout, "Logfile: %s\n", filename);
110
111 free(filename);
112 fprintf(output, "#round load sleep performance powersave percentage\n");
113 return output;
114}
115
116
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121
122
123struct config *prepare_default_config()
124{
125 struct config *config = malloc(sizeof(struct config));
126
127 dprintf("loading defaults\n");
128
129 config->sleep = 500000;
130 config->load = 500000;
131 config->sleep_step = 500000;
132 config->load_step = 500000;
133 config->cycles = 5;
134 config->rounds = 50;
135 config->cpu = 0;
136 config->prio = SCHED_HIGH;
137 config->verbose = 0;
138 strncpy(config->governor, "ondemand", 8);
139
140 config->output = stdout;
141
142#ifdef DEFAULT_CONFIG_FILE
143 if (prepare_config(DEFAULT_CONFIG_FILE, config))
144 return NULL;
145#endif
146 return config;
147}
148
149
150
151
152
153
154
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156
157
158int prepare_config(const char *path, struct config *config)
159{
160 size_t len = 0;
161 char opt[16], val[32], *line = NULL;
162 FILE *configfile;
163
164 if (config == NULL) {
165 fprintf(stderr, "error: config is NULL\n");
166 return 1;
167 }
168
169 configfile = fopen(path, "r");
170 if (configfile == NULL) {
171 perror("fopen");
172 fprintf(stderr, "error: unable to read configfile\n");
173 free(config);
174 return 1;
175 }
176
177 while (getline(&line, &len, configfile) != -1) {
178 if (line[0] == '#' || line[0] == ' ' || line[0] == '\n')
179 continue;
180
181 if (sscanf(line, "%14s = %30s", opt, val) < 2)
182 continue;
183
184 dprintf("parsing: %s -> %s\n", opt, val);
185
186 if (strcmp("sleep", opt) == 0)
187 sscanf(val, "%li", &config->sleep);
188
189 else if (strcmp("load", opt) == 0)
190 sscanf(val, "%li", &config->load);
191
192 else if (strcmp("load_step", opt) == 0)
193 sscanf(val, "%li", &config->load_step);
194
195 else if (strcmp("sleep_step", opt) == 0)
196 sscanf(val, "%li", &config->sleep_step);
197
198 else if (strcmp("cycles", opt) == 0)
199 sscanf(val, "%u", &config->cycles);
200
201 else if (strcmp("rounds", opt) == 0)
202 sscanf(val, "%u", &config->rounds);
203
204 else if (strcmp("verbose", opt) == 0)
205 sscanf(val, "%u", &config->verbose);
206
207 else if (strcmp("output", opt) == 0)
208 config->output = prepare_output(val);
209
210 else if (strcmp("cpu", opt) == 0)
211 sscanf(val, "%u", &config->cpu);
212
213 else if (strcmp("governor", opt) == 0) {
214 strncpy(config->governor, val,
215 sizeof(config->governor));
216 config->governor[sizeof(config->governor) - 1] = '\0';
217 }
218
219 else if (strcmp("priority", opt) == 0) {
220 if (string_to_prio(val) != SCHED_ERR)
221 config->prio = string_to_prio(val);
222 }
223 }
224
225 free(line);
226
227 return 0;
228}
229