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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 | ||
41 | char *record_header = "CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle\n"; | |
42 | int record_header_len = 0; | |
43 | ||
44 | static int past_eof(struct trace *trace, char *cur) | |
45 | { | |
46 | if (cur >= trace->mpstat_start + trace->mpstat_len) | |
47 | return 1; | |
48 | return 0; | |
49 | } | |
50 | ||
51 | int next_mpstat_line(struct trace *trace) | |
52 | { | |
53 | char *next; | |
54 | char *cur = trace->mpstat_cur; | |
55 | ||
56 | next = strchr(cur, '\n'); | |
57 | if (!next) | |
58 | return 1; | |
59 | next++; | |
60 | if (past_eof(trace, next)) | |
61 | return 1; | |
62 | trace->mpstat_cur = next; | |
63 | return 0; | |
64 | } | |
65 | ||
66 | char *next_mpstat(struct trace *trace) | |
67 | { | |
68 | char *cur = trace->mpstat_cur; | |
69 | ||
70 | cur = strstr(cur, record_header); | |
71 | if (!cur) | |
72 | return NULL; | |
73 | ||
74 | cur += record_header_len; | |
75 | if (past_eof(trace, cur)) | |
76 | return NULL; | |
77 | trace->mpstat_cur = cur; | |
78 | return cur; | |
79 | } | |
80 | ||
81 | char *first_mpstat(struct trace *trace) | |
82 | { | |
83 | char *cur = trace->mpstat_cur; | |
84 | ||
85 | trace->mpstat_cur = trace->mpstat_start; | |
86 | ||
87 | cur = next_mpstat(trace); | |
88 | if (!cur) | |
89 | return NULL; | |
90 | return cur; | |
91 | } | |
92 | ||
93 | static void find_last_mpstat_time(struct trace *trace) | |
94 | { | |
95 | int num_mpstats = 0; | |
96 | char *cur; | |
97 | ||
98 | first_mpstat(trace); | |
99 | ||
100 | cur = first_mpstat(trace); | |
101 | while (cur) { | |
102 | num_mpstats++; | |
103 | cur = next_mpstat(trace); | |
104 | } | |
105 | first_mpstat(trace); | |
106 | trace->mpstat_seconds = num_mpstats; | |
107 | } | |
108 | ||
109 | static int count_mpstat_cpus(struct trace *trace) | |
110 | { | |
111 | char *cur = trace->mpstat_start; | |
112 | char *cpu; | |
113 | char *record; | |
114 | int len; | |
115 | char *line; | |
116 | ||
117 | first_mpstat(trace); | |
118 | ||
119 | cpu = strstr(cur, " CPU)"); | |
120 | if (!cpu) | |
121 | return 0; | |
122 | line = strndup(cur, cpu - cur); | |
123 | ||
124 | record = strrchr(line, '('); | |
125 | if (!record) { | |
126 | free(line); | |
127 | return 0; | |
128 | } | |
129 | record++; | |
130 | ||
131 | len = line + strlen(line) - record; | |
132 | ||
133 | cur = strndup(record, len); | |
134 | trace->mpstat_num_cpus = atoi(cur); | |
135 | first_mpstat(trace); | |
136 | free(line); | |
137 | return trace->mpstat_num_cpus; | |
138 | } | |
139 | ||
140 | static char *guess_filename(char *trace_name) | |
141 | { | |
142 | struct stat st; | |
143 | int ret; | |
144 | char *cur; | |
145 | char *tmp; | |
146 | ||
147 | snprintf(line, line_len, "%s.mpstat", trace_name); | |
148 | ret = stat(line, &st); | |
149 | if (ret == 0) | |
150 | return trace_name; | |
151 | ||
152 | cur = strrchr(trace_name, '.'); | |
153 | if (!cur) { | |
154 | return trace_name; | |
155 | } | |
156 | ||
157 | tmp = strndup(trace_name, cur - trace_name); | |
158 | snprintf(line, line_len, "%s.mpstat", tmp); | |
159 | ret = stat(line, &st); | |
160 | if (ret == 0) | |
161 | return tmp; | |
162 | ||
163 | free(tmp); | |
164 | return trace_name; | |
165 | } | |
166 | ||
167 | int read_mpstat(struct trace *trace, char *trace_name) | |
168 | { | |
169 | int fd; | |
170 | struct stat st; | |
171 | int ret; | |
172 | char *p; | |
173 | ||
174 | if (record_header_len == 0) { | |
175 | record_header_len = strlen(record_header); | |
176 | } | |
177 | ||
178 | snprintf(line, line_len, "%s.mpstat", guess_filename(trace_name)); | |
179 | ||
180 | fd = open(line, O_RDONLY); | |
181 | if (fd < 0) | |
182 | return 0; | |
183 | ||
184 | ret = fstat(fd, &st); | |
185 | if (ret < 0) { | |
186 | fprintf(stderr, "stat failed on %s err %s\n", line, strerror(errno)); | |
187 | goto fail_fd; | |
188 | } | |
189 | p = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
190 | if (p == MAP_FAILED) { | |
191 | fprintf(stderr, "Unable to mmap trace file %s, err %s\n", line, strerror(errno)); | |
192 | goto fail_fd; | |
193 | } | |
194 | ||
195 | trace->mpstat_start = p; | |
196 | trace->mpstat_len = st.st_size; | |
197 | trace->mpstat_cur = p; | |
198 | trace->mpstat_fd = fd; | |
199 | find_last_mpstat_time(trace); | |
200 | count_mpstat_cpus(trace); | |
201 | ||
202 | first_mpstat(trace); | |
203 | ||
204 | return 0; | |
205 | ||
206 | fail_fd: | |
207 | close(fd); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | /* | |
212 | * 09:56:26 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle | |
213 | * | |
214 | * this reads just one line in the mpstat | |
215 | */ | |
216 | int read_mpstat_event(struct trace *trace, double *user, | |
217 | double *sys, double *iowait, double *irq, | |
218 | double *soft) | |
219 | { | |
220 | char *cur = trace->mpstat_cur; | |
221 | char *nptr; | |
222 | double val; | |
223 | ||
224 | /* jump past the date and CPU number */ | |
225 | cur += 16; | |
226 | if (past_eof(trace, cur)) | |
227 | return 1; | |
228 | ||
229 | /* usr time */ | |
230 | val = strtod(cur, &nptr); | |
231 | if (val == 0 && cur == nptr) | |
232 | return 1; | |
233 | *user = val; | |
234 | ||
235 | /* nice time, pitch this one */ | |
236 | cur = nptr; | |
237 | val = strtod(cur, &nptr); | |
238 | if (val == 0 && cur == nptr) | |
239 | return 1; | |
240 | ||
241 | /* system time */ | |
242 | cur = nptr; | |
243 | val = strtod(cur, &nptr); | |
244 | if (val == 0 && cur == nptr) | |
245 | return 1; | |
246 | *sys = val; | |
247 | ||
248 | cur = nptr; | |
249 | val = strtod(cur, &nptr); | |
250 | if (val == 0 && cur == nptr) | |
251 | return 1; | |
252 | *iowait = val; | |
253 | ||
254 | cur = nptr; | |
255 | val = strtod(cur, &nptr); | |
256 | if (val == 0 && cur == nptr) | |
257 | return 1; | |
258 | *irq = val; | |
259 | ||
260 | cur = nptr; | |
261 | val = strtod(cur, &nptr); | |
262 | if (val == 0 && cur == nptr) | |
263 | return 1; | |
264 | *soft = val; | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | int add_mpstat_gld(int time, double sys, struct graph_line_data *gld) | |
270 | { | |
271 | gld->data[time].sum = sys; | |
272 | gld->data[time].count = 1; | |
273 | return 0; | |
274 | ||
275 | } |