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21e47d90 ADB |
1 | /* |
2 | * blktrace output analysis: generate a timeline & gather statistics | |
3 | * | |
4 | * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | #include <stdio.h> | |
22 | #include <unistd.h> | |
23 | #include "globals.h" | |
24 | ||
21e47d90 ADB |
25 | #define INC_STAT(dip, fld) \ |
26 | do { \ | |
27 | (dip)->stats. fld ++; \ | |
28 | (dip)->all_stats. fld ++; \ | |
29 | } while (0) | |
30 | ||
31 | #define DEC_STAT(dip, fld) \ | |
32 | do { \ | |
33 | (dip)->stats. fld --; \ | |
34 | (dip)->all_stats. fld --; \ | |
35 | } while (0) | |
36 | ||
37 | #define ADD_STAT(dip, fld, val) \ | |
38 | do { \ | |
39 | __u64 __v = (val); \ | |
40 | (dip)->stats. fld += __v; \ | |
41 | (dip)->all_stats. fld += __v; \ | |
42 | } while (0) | |
43 | ||
44 | #define SUB_STAT(dip, fld, val) \ | |
45 | do { \ | |
46 | __u64 __v = (val); \ | |
47 | (dip)->stats. fld -= __v; \ | |
48 | (dip)->all_stats. fld -= __v; \ | |
49 | } while (0) | |
50 | ||
51 | __u64 last_start, iostat_last_stamp; | |
52 | __u64 iostat_interval = 1; | |
53 | char *iostat_name = NULL; | |
54 | FILE *iostat_ofp = NULL; | |
55 | ||
21e47d90 ADB |
56 | void dump_hdr(void) |
57 | { | |
58 | fprintf(iostat_ofp, "Device: rrqm/s wrqm/s r/s w/s " | |
59 | "rsec/s wsec/s rkB/s wkB/s " | |
60 | "avgrq-sz avgqu-sz await svctm %%util Stamp\n"); | |
61 | } | |
62 | ||
6eb42155 ADB |
63 | void im2d2c_func(struct io *c_iop, struct io *im_iop) |
64 | { | |
095181f2 | 65 | ADD_STAT(c_iop->dip, wait, tdelta(im_iop, c_iop)); |
6eb42155 ADB |
66 | } |
67 | ||
21e47d90 ADB |
68 | void iostat_init(void) |
69 | { | |
70 | last_start = (__u64)-1; | |
71 | if (iostat_ofp) | |
72 | dump_hdr(); | |
73 | } | |
74 | ||
75 | void update_tot_qusz(struct d_info *dip, double now) | |
76 | { | |
77 | dip->stats.tot_qusz += ((now - dip->stats.last_qu_change) * | |
78 | dip->stats.cur_qusz); | |
79 | dip->all_stats.tot_qusz += ((now - dip->all_stats.last_qu_change) * | |
80 | dip->all_stats.cur_qusz); | |
81 | ||
82 | dip->stats.last_qu_change = dip->all_stats.last_qu_change = now; | |
83 | } | |
84 | ||
d216e9ce | 85 | void update_idle_time(struct d_info *dip, double now, int force) |
21e47d90 | 86 | { |
d216e9ce | 87 | if (dip->stats.cur_dev == 0 || force) { |
21e47d90 ADB |
88 | dip->stats.idle_time += (now - dip->stats.last_dev_change); |
89 | dip->all_stats.idle_time += | |
90 | (now - dip->all_stats.last_dev_change); | |
91 | } | |
92 | dip->stats.last_dev_change = dip->all_stats.last_dev_change = now; | |
93 | } | |
94 | ||
4a5cddba | 95 | void __dump_stats(__u64 stamp, int all, struct d_info *dip, struct stats_t *asp) |
21e47d90 ADB |
96 | { |
97 | char hdr[16]; | |
98 | struct stats *sp; | |
d216e9ce | 99 | double dt, nios, avgrq_sz, p_util, nrqm, await, svctm; |
21e47d90 ADB |
100 | double now = TO_SEC(stamp); |
101 | ||
102 | if (all) { | |
103 | dt = (double)stamp / 1.0e9; | |
104 | sp = &dip->all_stats; | |
105 | } | |
106 | else { | |
107 | dt = (double)(stamp-last_start) / 1.0e9; | |
108 | sp = &dip->stats; | |
109 | } | |
110 | ||
111 | nios = (double)(sp->ios[0] + sp->ios[1]); | |
112 | nrqm = (double)(sp->rqm[0] + sp->rqm[1]); | |
d216e9ce ADB |
113 | update_idle_time(dip, now, 1); |
114 | update_tot_qusz(dip, now); | |
115 | ||
21e47d90 | 116 | if (nios > 0.0) { |
21e47d90 | 117 | avgrq_sz = (double)(sp->sec[0] + sp->sec[1]) / nios; |
d216e9ce ADB |
118 | svctm = TO_MSEC(sp->svctm) / nios; |
119 | } | |
120 | else | |
121 | avgrq_sz = svctm = 0.0; | |
122 | ||
123 | await = ((nios + nrqm) > 0.0) ? TO_MSEC(sp->wait) / (nios+nrqm) : 0.0; | |
124 | p_util = (sp->idle_time <= dt) ? 100.0 * (1.0 - (sp->idle_time / dt)) : | |
125 | 0.0; | |
126 | ||
127 | /* | |
128 | * For AWAIT: nios should be the same as number of inserts | |
129 | * and we add in nrqm (number of merges), which should give | |
130 | * us the total number of IOs sent to the block IO layer. | |
131 | */ | |
132 | fprintf(iostat_ofp, "%-11s ", make_dev_hdr(hdr, 11, dip)); | |
133 | fprintf(iostat_ofp, "%8.2lf ", (double)sp->rqm[1] / dt); | |
134 | fprintf(iostat_ofp, "%8.2lf ", (double)sp->rqm[0] / dt); | |
135 | fprintf(iostat_ofp, "%7.2lf ", (double)sp->ios[1] / dt); | |
136 | fprintf(iostat_ofp, "%7.2lf ", (double)sp->ios[0] / dt); | |
137 | fprintf(iostat_ofp, "%9.2lf ", (double)sp->sec[1] / dt); | |
138 | fprintf(iostat_ofp, "%9.2lf ", (double)sp->sec[0] / dt); | |
139 | fprintf(iostat_ofp, "%9.2lf ", (double)(sp->sec[1] / 2) / dt); | |
140 | fprintf(iostat_ofp, "%9.2lf ", (double)(sp->sec[0] / 2) / dt); | |
141 | fprintf(iostat_ofp, "%8.2lf ", avgrq_sz); | |
142 | fprintf(iostat_ofp, "%8.2lf ", (double)sp->tot_qusz / dt); | |
143 | fprintf(iostat_ofp, "%7.2lf ", await); | |
144 | fprintf(iostat_ofp, "%7.2lf ", svctm); | |
145 | fprintf(iostat_ofp, "%6.2lf", p_util); | |
146 | if (all) | |
147 | fprintf(iostat_ofp, "%8s\n", "TOTAL"); | |
148 | else { | |
149 | fprintf(iostat_ofp, "%8.2lf\n", TO_SEC(stamp)); | |
150 | sp->rqm[0] = sp->rqm[1] = 0; | |
151 | sp->ios[0] = sp->ios[1] = 0; | |
152 | sp->sec[0] = sp->sec[1] = 0; | |
153 | sp->wait = sp->svctm = 0; | |
154 | ||
155 | sp->tot_qusz = sp->idle_time = 0.0; | |
21e47d90 | 156 | } |
4a5cddba JA |
157 | |
158 | if (asp) { | |
159 | int i; | |
160 | ||
161 | asp->n += 1.0; | |
162 | for (i = 0; i < 2; i++) { | |
163 | asp->rqm_s[i] += ((double)sp->rqm[i] / dt); | |
164 | asp->ios_s[i] += ((double)sp->ios[i] / dt); | |
165 | asp->sec_s[i] += ((double)sp->sec[i] / dt); | |
166 | } | |
167 | asp->avgrq_sz += avgrq_sz; | |
168 | asp->avgqu_sz += (double)sp->tot_qusz / dt; | |
169 | asp->await += await; | |
170 | asp->svctm += svctm; | |
171 | asp->p_util += p_util; | |
172 | } | |
173 | } | |
174 | ||
175 | void __dump_stats_t(__u64 stamp, struct stats_t *asp, int all) | |
176 | { | |
177 | if (asp->n < 2.0) return; // What's the point? | |
178 | ||
179 | fprintf(iostat_ofp, "%-11s ", "TOTAL"); | |
180 | fprintf(iostat_ofp, "%8.2lf ", asp->rqm_s[0]); | |
181 | fprintf(iostat_ofp, "%8.2lf ", asp->rqm_s[1]); | |
182 | fprintf(iostat_ofp, "%7.2lf ", asp->ios_s[0]); | |
183 | fprintf(iostat_ofp, "%7.2lf ", asp->ios_s[1]); | |
184 | fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[0]); | |
185 | fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[1]); | |
186 | fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[0] / 2.0); | |
187 | fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[1] / 2.0); | |
188 | fprintf(iostat_ofp, "%8.2lf ", asp->avgrq_sz / asp->n); | |
189 | fprintf(iostat_ofp, "%8.2lf ", asp->avgqu_sz / asp->n); | |
190 | fprintf(iostat_ofp, "%7.2lf ", asp->await / asp->n); | |
191 | fprintf(iostat_ofp, "%7.2lf ", asp->svctm / asp->n); | |
192 | fprintf(iostat_ofp, "%6.2lf", asp->p_util / asp->n); | |
193 | if (all) | |
194 | fprintf(iostat_ofp, "%8s\n", "TOTAL"); | |
195 | else | |
196 | fprintf(iostat_ofp, "%8.2lf\n", TO_SEC(stamp)); | |
21e47d90 ADB |
197 | } |
198 | ||
199 | void iostat_dump_stats(__u64 stamp, int all) | |
200 | { | |
201 | struct d_info *dip; | |
4a5cddba | 202 | struct stats_t as; |
21e47d90 | 203 | |
4a5cddba | 204 | memset(&as, 0, sizeof(struct stats_t)); |
21e47d90 ADB |
205 | if (all) |
206 | dump_hdr(); | |
4a5cddba | 207 | |
21e47d90 ADB |
208 | if (devices == NULL) { |
209 | struct list_head *p; | |
210 | ||
211 | __list_for_each(p, &all_devs) { | |
6eb42155 | 212 | dip = list_entry(p, struct d_info, all_head); |
4a5cddba | 213 | __dump_stats(stamp, all, dip, &as); |
21e47d90 ADB |
214 | } |
215 | } | |
216 | else { | |
217 | int i; | |
218 | unsigned int mjr, mnr; | |
219 | char *p = devices; | |
220 | ||
221 | while (p && ((i = sscanf(p, "%u,%u", &mjr, &mnr)) == 2)) { | |
222 | dip = __dip_find((__u32)((mjr << MINORBITS) | mnr)); | |
4a5cddba | 223 | __dump_stats(stamp, all, dip, &as); |
21e47d90 ADB |
224 | |
225 | p = strchr(p, ';'); | |
226 | if (p) p++; | |
227 | } | |
228 | } | |
4a5cddba JA |
229 | |
230 | __dump_stats_t(stamp, &as, all); | |
231 | ||
d216e9ce ADB |
232 | if (!all && iostat_ofp) |
233 | fprintf(iostat_ofp, "\n"); | |
21e47d90 ADB |
234 | } |
235 | ||
236 | void iostat_check_time(__u64 stamp) | |
237 | { | |
238 | if (iostat_ofp) { | |
239 | if (last_start == (__u64)-1) | |
240 | last_start = stamp; | |
241 | else if ((stamp - last_start) >= iostat_interval) { | |
242 | iostat_dump_stats(stamp, 0); | |
243 | last_start = stamp; | |
244 | } | |
245 | ||
246 | iostat_last_stamp = stamp; | |
247 | } | |
248 | } | |
249 | ||
250 | void iostat_insert(struct io *iop) | |
251 | { | |
252 | update_tot_qusz(iop->dip, TO_SEC(iop->t.time)); | |
253 | INC_STAT(iop->dip, cur_qusz); | |
254 | } | |
255 | ||
256 | void iostat_merge(struct io *iop) | |
257 | { | |
258 | INC_STAT(iop->dip, rqm[IOP_RW(iop)]); | |
259 | } | |
260 | ||
261 | void iostat_issue(struct io *iop) | |
262 | { | |
263 | int rw = IOP_RW(iop); | |
264 | struct d_info *dip = iop->dip; | |
265 | double now = TO_SEC(iop->t.time); | |
266 | ||
267 | INC_STAT(dip, ios[rw]); | |
268 | ADD_STAT(dip, sec[rw], iop->t.bytes >> 9); | |
269 | ||
d216e9ce | 270 | update_idle_time(dip, now, 0); |
21e47d90 ADB |
271 | INC_STAT(dip, cur_dev); |
272 | } | |
273 | ||
6eb42155 | 274 | void iostat_unissue(struct io *iop) |
21e47d90 | 275 | { |
6eb42155 | 276 | int rw = IOP_RW(iop); |
21e47d90 ADB |
277 | struct d_info *dip = iop->dip; |
278 | ||
6eb42155 ADB |
279 | DEC_STAT(dip, ios[rw]); |
280 | SUB_STAT(dip, sec[rw], iop->t.bytes >> 9); | |
281 | DEC_STAT(dip, cur_dev); | |
282 | } | |
21e47d90 | 283 | |
6eb42155 ADB |
284 | void iostat_complete(struct io *d_iop, struct io *c_iop) |
285 | { | |
286 | double now = TO_SEC(c_iop->t.time); | |
287 | struct d_info *dip = d_iop->dip; | |
21e47d90 | 288 | |
6eb42155 ADB |
289 | dip_foreach(d_iop, IOP_I, im2d2c_func, 0); |
290 | dip_foreach(d_iop, IOP_M, im2d2c_func, 0); | |
21e47d90 | 291 | |
6eb42155 ADB |
292 | update_tot_qusz(dip, now); |
293 | DEC_STAT(dip, cur_qusz); | |
294 | ||
295 | update_idle_time(dip, now, 0); | |
296 | DEC_STAT(dip, cur_dev); | |
297 | ||
095181f2 | 298 | ADD_STAT(dip, svctm, tdelta(d_iop, c_iop)); |
21e47d90 | 299 | } |