Commit | Line | Data |
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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 | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
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 | { | |
71 | char *cur = trace->mpstat_cur; | |
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 | ||
118 | static int count_mpstat_cpus(struct trace *trace) | |
119 | { | |
120 | char *cur = trace->mpstat_start; | |
121 | char *cpu; | |
122 | char *record; | |
2203e914 | 123 | int len; char *line; |
fd70186d CM |
124 | |
125 | first_mpstat(trace); | |
126 | ||
127 | cpu = strstr(cur, " CPU)"); | |
128 | if (!cpu) | |
129 | return 0; | |
130 | line = strndup(cur, cpu - cur); | |
131 | ||
132 | record = strrchr(line, '('); | |
133 | if (!record) { | |
134 | free(line); | |
135 | return 0; | |
136 | } | |
137 | record++; | |
138 | ||
139 | len = line + strlen(line) - record; | |
140 | ||
141 | cur = strndup(record, len); | |
142 | trace->mpstat_num_cpus = atoi(cur); | |
143 | first_mpstat(trace); | |
144 | free(line); | |
2203e914 | 145 | |
fd70186d CM |
146 | return trace->mpstat_num_cpus; |
147 | } | |
148 | ||
149 | static char *guess_filename(char *trace_name) | |
150 | { | |
151 | struct stat st; | |
152 | int ret; | |
153 | char *cur; | |
154 | char *tmp; | |
155 | ||
156 | snprintf(line, line_len, "%s.mpstat", trace_name); | |
157 | ret = stat(line, &st); | |
158 | if (ret == 0) | |
159 | return trace_name; | |
160 | ||
161 | cur = strrchr(trace_name, '.'); | |
162 | if (!cur) { | |
163 | return trace_name; | |
164 | } | |
165 | ||
166 | tmp = strndup(trace_name, cur - trace_name); | |
167 | snprintf(line, line_len, "%s.mpstat", tmp); | |
168 | ret = stat(line, &st); | |
169 | if (ret == 0) | |
170 | return tmp; | |
171 | ||
172 | free(tmp); | |
173 | return trace_name; | |
174 | } | |
175 | ||
176 | int read_mpstat(struct trace *trace, char *trace_name) | |
177 | { | |
178 | int fd; | |
179 | struct stat st; | |
180 | int ret; | |
181 | char *p; | |
182 | ||
183 | if (record_header_len == 0) { | |
184 | record_header_len = strlen(record_header); | |
185 | } | |
186 | ||
187 | snprintf(line, line_len, "%s.mpstat", guess_filename(trace_name)); | |
fd70186d CM |
188 | fd = open(line, O_RDONLY); |
189 | if (fd < 0) | |
190 | return 0; | |
191 | ||
192 | ret = fstat(fd, &st); | |
193 | if (ret < 0) { | |
194 | fprintf(stderr, "stat failed on %s err %s\n", line, strerror(errno)); | |
195 | goto fail_fd; | |
196 | } | |
197 | p = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
198 | if (p == MAP_FAILED) { | |
199 | fprintf(stderr, "Unable to mmap trace file %s, err %s\n", line, strerror(errno)); | |
200 | goto fail_fd; | |
201 | } | |
fd70186d CM |
202 | trace->mpstat_start = p; |
203 | trace->mpstat_len = st.st_size; | |
204 | trace->mpstat_cur = p; | |
205 | trace->mpstat_fd = fd; | |
206 | find_last_mpstat_time(trace); | |
207 | count_mpstat_cpus(trace); | |
208 | ||
209 | first_mpstat(trace); | |
210 | ||
211 | return 0; | |
212 | ||
213 | fail_fd: | |
214 | close(fd); | |
215 | return 0; | |
216 | } | |
217 | ||
218 | /* | |
219 | * 09:56:26 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle | |
220 | * | |
2203e914 CM |
221 | * or |
222 | * | |
223 | * 10:18:51 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle | |
224 | * | |
225 | * | |
fd70186d CM |
226 | * this reads just one line in the mpstat |
227 | */ | |
228 | int read_mpstat_event(struct trace *trace, double *user, | |
229 | double *sys, double *iowait, double *irq, | |
230 | double *soft) | |
231 | { | |
232 | char *cur = trace->mpstat_cur; | |
233 | char *nptr; | |
234 | double val; | |
235 | ||
236 | /* jump past the date and CPU number */ | |
237 | cur += 16; | |
238 | if (past_eof(trace, cur)) | |
239 | return 1; | |
240 | ||
241 | /* usr time */ | |
242 | val = strtod(cur, &nptr); | |
243 | if (val == 0 && cur == nptr) | |
244 | return 1; | |
245 | *user = val; | |
246 | ||
247 | /* nice time, pitch this one */ | |
248 | cur = nptr; | |
249 | val = strtod(cur, &nptr); | |
250 | if (val == 0 && cur == nptr) | |
251 | return 1; | |
252 | ||
253 | /* system time */ | |
254 | cur = nptr; | |
255 | val = strtod(cur, &nptr); | |
256 | if (val == 0 && cur == nptr) | |
257 | return 1; | |
258 | *sys = val; | |
259 | ||
260 | cur = nptr; | |
261 | val = strtod(cur, &nptr); | |
262 | if (val == 0 && cur == nptr) | |
263 | return 1; | |
264 | *iowait = val; | |
265 | ||
266 | cur = nptr; | |
267 | val = strtod(cur, &nptr); | |
268 | if (val == 0 && cur == nptr) | |
269 | return 1; | |
270 | *irq = val; | |
271 | ||
272 | cur = nptr; | |
273 | val = strtod(cur, &nptr); | |
274 | if (val == 0 && cur == nptr) | |
275 | return 1; | |
276 | *soft = val; | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | int add_mpstat_gld(int time, double sys, struct graph_line_data *gld) | |
282 | { | |
283 | gld->data[time].sum = sys; | |
284 | gld->data[time].count = 1; | |
285 | return 0; | |
286 | ||
287 | } |