Commit | Line | Data |
---|---|---|
fd70186d CM |
1 | /* |
2 | * Copyright (C) 2012 Fusion-io | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
660b0411 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
fd70186d CM |
16 | */ |
17 | #include <sys/types.h> | |
18 | #include <sys/stat.h> | |
19 | #include <fcntl.h> | |
20 | #include <unistd.h> | |
21 | #include <stdlib.h> | |
22 | #include <stdio.h> | |
23 | #include <math.h> | |
24 | #include <inttypes.h> | |
25 | #include <string.h> | |
26 | #include <asm/types.h> | |
27 | #include <errno.h> | |
28 | #include <sys/mman.h> | |
29 | #include <time.h> | |
30 | #include <math.h> | |
31 | ||
32 | #include "plot.h" | |
33 | #include "blkparse.h" | |
34 | #include "list.h" | |
35 | #include "tracers.h" | |
36 | #include "mpstat.h" | |
37 | ||
38 | char line[1024]; | |
39 | int line_len = 1024; | |
40 | ||
2203e914 CM |
41 | static char record_header[] = "CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle\n"; |
42 | static char record_header_v2[] = "CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle\n"; | |
43 | ||
44 | int record_header_len = sizeof(record_header); | |
45 | int record_header_v2_len = sizeof(record_header_v2); | |
fd70186d CM |
46 | |
47 | static int past_eof(struct trace *trace, char *cur) | |
48 | { | |
49 | if (cur >= trace->mpstat_start + trace->mpstat_len) | |
50 | return 1; | |
51 | return 0; | |
52 | } | |
53 | ||
54 | int next_mpstat_line(struct trace *trace) | |
55 | { | |
56 | char *next; | |
57 | char *cur = trace->mpstat_cur; | |
58 | ||
59 | next = strchr(cur, '\n'); | |
60 | if (!next) | |
61 | return 1; | |
62 | next++; | |
63 | if (past_eof(trace, next)) | |
64 | return 1; | |
65 | trace->mpstat_cur = next; | |
66 | return 0; | |
67 | } | |
68 | ||
69 | char *next_mpstat(struct trace *trace) | |
70 | { | |
d7d5d7c3 | 71 | char *cur; |
fd70186d | 72 | |
2203e914 CM |
73 | cur = strstr(trace->mpstat_cur, record_header); |
74 | if (cur) { | |
75 | cur += record_header_len; | |
76 | } else { | |
77 | cur = strstr(trace->mpstat_cur, record_header_v2); | |
78 | if (cur) | |
79 | cur += record_header_v2_len; | |
80 | } | |
fd70186d CM |
81 | if (!cur) |
82 | return NULL; | |
83 | ||
fd70186d CM |
84 | if (past_eof(trace, cur)) |
85 | return NULL; | |
86 | trace->mpstat_cur = cur; | |
87 | return cur; | |
88 | } | |
89 | ||
90 | char *first_mpstat(struct trace *trace) | |
91 | { | |
92 | char *cur = trace->mpstat_cur; | |
93 | ||
94 | trace->mpstat_cur = trace->mpstat_start; | |
95 | ||
96 | cur = next_mpstat(trace); | |
97 | if (!cur) | |
98 | return NULL; | |
99 | return cur; | |
100 | } | |
101 | ||
102 | static void find_last_mpstat_time(struct trace *trace) | |
103 | { | |
104 | int num_mpstats = 0; | |
105 | char *cur; | |
106 | ||
107 | first_mpstat(trace); | |
108 | ||
109 | cur = first_mpstat(trace); | |
110 | while (cur) { | |
111 | num_mpstats++; | |
112 | cur = next_mpstat(trace); | |
113 | } | |
114 | first_mpstat(trace); | |
115 | trace->mpstat_seconds = num_mpstats; | |
116 | } | |
117 | ||
d7d5d7c3 CM |
118 | static int guess_mpstat_cpus(struct trace *trace) |
119 | { | |
120 | char *cur; | |
121 | int ret; | |
122 | int count = 0; | |
123 | ||
124 | cur = first_mpstat(trace); | |
125 | if (!cur) | |
126 | return 0; | |
127 | ||
128 | while (1) { | |
129 | ret = next_mpstat_line(trace); | |
130 | if (ret) | |
131 | break; | |
132 | ||
133 | cur = trace->mpstat_cur; | |
134 | count++; | |
135 | ||
136 | if (!cur) | |
137 | break; | |
138 | ||
139 | if (cur[0] == '\n') | |
140 | break; | |
141 | } | |
142 | trace->mpstat_num_cpus = count - 1; | |
143 | return 0; | |
144 | } | |
145 | ||
fd70186d CM |
146 | static int count_mpstat_cpus(struct trace *trace) |
147 | { | |
148 | char *cur = trace->mpstat_start; | |
149 | char *cpu; | |
150 | char *record; | |
2203e914 | 151 | int len; char *line; |
fd70186d CM |
152 | |
153 | first_mpstat(trace); | |
fd70186d CM |
154 | cpu = strstr(cur, " CPU)"); |
155 | if (!cpu) | |
d7d5d7c3 CM |
156 | return guess_mpstat_cpus(trace); |
157 | ||
fd70186d CM |
158 | line = strndup(cur, cpu - cur); |
159 | ||
160 | record = strrchr(line, '('); | |
161 | if (!record) { | |
162 | free(line); | |
163 | return 0; | |
164 | } | |
165 | record++; | |
166 | ||
167 | len = line + strlen(line) - record; | |
168 | ||
169 | cur = strndup(record, len); | |
170 | trace->mpstat_num_cpus = atoi(cur); | |
171 | first_mpstat(trace); | |
172 | free(line); | |
2203e914 | 173 | |
fd70186d CM |
174 | return trace->mpstat_num_cpus; |
175 | } | |
176 | ||
177 | static char *guess_filename(char *trace_name) | |
178 | { | |
179 | struct stat st; | |
180 | int ret; | |
181 | char *cur; | |
182 | char *tmp; | |
183 | ||
184 | snprintf(line, line_len, "%s.mpstat", trace_name); | |
185 | ret = stat(line, &st); | |
186 | if (ret == 0) | |
187 | return trace_name; | |
188 | ||
189 | cur = strrchr(trace_name, '.'); | |
190 | if (!cur) { | |
191 | return trace_name; | |
192 | } | |
193 | ||
194 | tmp = strndup(trace_name, cur - trace_name); | |
195 | snprintf(line, line_len, "%s.mpstat", tmp); | |
196 | ret = stat(line, &st); | |
197 | if (ret == 0) | |
198 | return tmp; | |
199 | ||
200 | free(tmp); | |
201 | return trace_name; | |
202 | } | |
203 | ||
204 | int read_mpstat(struct trace *trace, char *trace_name) | |
205 | { | |
206 | int fd; | |
207 | struct stat st; | |
208 | int ret; | |
209 | char *p; | |
210 | ||
211 | if (record_header_len == 0) { | |
212 | record_header_len = strlen(record_header); | |
213 | } | |
214 | ||
215 | snprintf(line, line_len, "%s.mpstat", guess_filename(trace_name)); | |
fd70186d CM |
216 | fd = open(line, O_RDONLY); |
217 | if (fd < 0) | |
218 | return 0; | |
219 | ||
220 | ret = fstat(fd, &st); | |
221 | if (ret < 0) { | |
222 | fprintf(stderr, "stat failed on %s err %s\n", line, strerror(errno)); | |
223 | goto fail_fd; | |
224 | } | |
225 | p = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
226 | if (p == MAP_FAILED) { | |
227 | fprintf(stderr, "Unable to mmap trace file %s, err %s\n", line, strerror(errno)); | |
228 | goto fail_fd; | |
229 | } | |
fd70186d CM |
230 | trace->mpstat_start = p; |
231 | trace->mpstat_len = st.st_size; | |
232 | trace->mpstat_cur = p; | |
233 | trace->mpstat_fd = fd; | |
234 | find_last_mpstat_time(trace); | |
235 | count_mpstat_cpus(trace); | |
236 | ||
237 | first_mpstat(trace); | |
238 | ||
239 | return 0; | |
240 | ||
241 | fail_fd: | |
242 | close(fd); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | /* | |
247 | * 09:56:26 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle | |
248 | * | |
2203e914 CM |
249 | * or |
250 | * | |
251 | * 10:18:51 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle | |
252 | * | |
253 | * | |
fd70186d CM |
254 | * this reads just one line in the mpstat |
255 | */ | |
256 | int read_mpstat_event(struct trace *trace, double *user, | |
257 | double *sys, double *iowait, double *irq, | |
258 | double *soft) | |
259 | { | |
260 | char *cur = trace->mpstat_cur; | |
261 | char *nptr; | |
262 | double val; | |
263 | ||
264 | /* jump past the date and CPU number */ | |
265 | cur += 16; | |
266 | if (past_eof(trace, cur)) | |
267 | return 1; | |
268 | ||
269 | /* usr time */ | |
270 | val = strtod(cur, &nptr); | |
271 | if (val == 0 && cur == nptr) | |
272 | return 1; | |
273 | *user = val; | |
274 | ||
275 | /* nice time, pitch this one */ | |
276 | cur = nptr; | |
277 | val = strtod(cur, &nptr); | |
278 | if (val == 0 && cur == nptr) | |
279 | return 1; | |
280 | ||
281 | /* system time */ | |
282 | cur = nptr; | |
283 | val = strtod(cur, &nptr); | |
284 | if (val == 0 && cur == nptr) | |
285 | return 1; | |
286 | *sys = val; | |
287 | ||
288 | cur = nptr; | |
289 | val = strtod(cur, &nptr); | |
290 | if (val == 0 && cur == nptr) | |
291 | return 1; | |
292 | *iowait = val; | |
293 | ||
294 | cur = nptr; | |
295 | val = strtod(cur, &nptr); | |
296 | if (val == 0 && cur == nptr) | |
297 | return 1; | |
298 | *irq = val; | |
299 | ||
300 | cur = nptr; | |
301 | val = strtod(cur, &nptr); | |
302 | if (val == 0 && cur == nptr) | |
303 | return 1; | |
304 | *soft = val; | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | int add_mpstat_gld(int time, double sys, struct graph_line_data *gld) | |
310 | { | |
311 | gld->data[time].sum = sys; | |
312 | gld->data[time].count = 1; | |
313 | return 0; | |
314 | ||
315 | } |