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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 | ||
c053af42 AB |
25 | #define INC_STAT(dip, fld) \ |
26 | do { \ | |
21e47d90 ADB |
27 | (dip)->stats. fld ++; \ |
28 | (dip)->all_stats. fld ++; \ | |
29 | } while (0) | |
30 | ||
c053af42 AB |
31 | #define DEC_STAT(dip, fld) \ |
32 | do { \ | |
21e47d90 ADB |
33 | (dip)->stats. fld --; \ |
34 | (dip)->all_stats. fld --; \ | |
35 | } while (0) | |
36 | ||
c053af42 AB |
37 | #define ADD_STAT(dip, fld, val) \ |
38 | do { \ | |
39 | __u64 __v = (val); \ | |
21e47d90 ADB |
40 | (dip)->stats. fld += __v; \ |
41 | (dip)->all_stats. fld += __v; \ | |
42 | } while (0) | |
43 | ||
c053af42 AB |
44 | #define SUB_STAT(dip, fld, val) \ |
45 | do { \ | |
46 | __u64 __v = (val); \ | |
21e47d90 ADB |
47 | (dip)->stats. fld -= __v; \ |
48 | (dip)->all_stats. fld -= __v; \ | |
49 | } while (0) | |
50 | ||
51 | __u64 last_start, iostat_last_stamp; | |
3e95108c | 52 | __u64 iostat_interval = 1000000000; |
21e47d90 ADB |
53 | char *iostat_name = NULL; |
54 | FILE *iostat_ofp = NULL; | |
55 | ||
c053af42 | 56 | static void dump_hdr(void) |
21e47d90 ADB |
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 | ||
c053af42 | 63 | static void update_tot_qusz(struct d_info *dip, double now) |
21e47d90 ADB |
64 | { |
65 | dip->stats.tot_qusz += ((now - dip->stats.last_qu_change) * | |
66 | dip->stats.cur_qusz); | |
67 | dip->all_stats.tot_qusz += ((now - dip->all_stats.last_qu_change) * | |
68 | dip->all_stats.cur_qusz); | |
69 | ||
70 | dip->stats.last_qu_change = dip->all_stats.last_qu_change = now; | |
71 | } | |
72 | ||
c053af42 | 73 | static void update_idle_time(struct d_info *dip, double now, int force) |
21e47d90 | 74 | { |
d216e9ce | 75 | if (dip->stats.cur_dev == 0 || force) { |
21e47d90 | 76 | dip->stats.idle_time += (now - dip->stats.last_dev_change); |
8b10aae0 | 77 | dip->all_stats.idle_time += |
21e47d90 ADB |
78 | (now - dip->all_stats.last_dev_change); |
79 | } | |
80 | dip->stats.last_dev_change = dip->all_stats.last_dev_change = now; | |
81 | } | |
82 | ||
4a5cddba | 83 | void __dump_stats(__u64 stamp, int all, struct d_info *dip, struct stats_t *asp) |
21e47d90 ADB |
84 | { |
85 | char hdr[16]; | |
86 | struct stats *sp; | |
d216e9ce | 87 | double dt, nios, avgrq_sz, p_util, nrqm, await, svctm; |
21e47d90 ADB |
88 | double now = TO_SEC(stamp); |
89 | ||
90 | if (all) { | |
91 | dt = (double)stamp / 1.0e9; | |
92 | sp = &dip->all_stats; | |
c053af42 | 93 | } else { |
21e47d90 ADB |
94 | dt = (double)(stamp-last_start) / 1.0e9; |
95 | sp = &dip->stats; | |
96 | } | |
97 | ||
98 | nios = (double)(sp->ios[0] + sp->ios[1]); | |
99 | nrqm = (double)(sp->rqm[0] + sp->rqm[1]); | |
d216e9ce ADB |
100 | update_idle_time(dip, now, 1); |
101 | update_tot_qusz(dip, now); | |
102 | ||
21e47d90 | 103 | if (nios > 0.0) { |
21e47d90 | 104 | avgrq_sz = (double)(sp->sec[0] + sp->sec[1]) / nios; |
d216e9ce | 105 | svctm = TO_MSEC(sp->svctm) / nios; |
c053af42 | 106 | } else |
d216e9ce ADB |
107 | avgrq_sz = svctm = 0.0; |
108 | ||
109 | await = ((nios + nrqm) > 0.0) ? TO_MSEC(sp->wait) / (nios+nrqm) : 0.0; | |
110 | p_util = (sp->idle_time <= dt) ? 100.0 * (1.0 - (sp->idle_time / dt)) : | |
111 | 0.0; | |
112 | ||
113 | /* | |
114 | * For AWAIT: nios should be the same as number of inserts | |
115 | * and we add in nrqm (number of merges), which should give | |
116 | * us the total number of IOs sent to the block IO layer. | |
117 | */ | |
84a26fcd | 118 | fprintf(iostat_ofp, "%-11s ", make_dev_hdr(hdr, 11, dip, 1)); |
d216e9ce ADB |
119 | fprintf(iostat_ofp, "%8.2lf ", (double)sp->rqm[1] / dt); |
120 | fprintf(iostat_ofp, "%8.2lf ", (double)sp->rqm[0] / dt); | |
121 | fprintf(iostat_ofp, "%7.2lf ", (double)sp->ios[1] / dt); | |
122 | fprintf(iostat_ofp, "%7.2lf ", (double)sp->ios[0] / dt); | |
123 | fprintf(iostat_ofp, "%9.2lf ", (double)sp->sec[1] / dt); | |
124 | fprintf(iostat_ofp, "%9.2lf ", (double)sp->sec[0] / dt); | |
125 | fprintf(iostat_ofp, "%9.2lf ", (double)(sp->sec[1] / 2) / dt); | |
126 | fprintf(iostat_ofp, "%9.2lf ", (double)(sp->sec[0] / 2) / dt); | |
127 | fprintf(iostat_ofp, "%8.2lf ", avgrq_sz); | |
128 | fprintf(iostat_ofp, "%8.2lf ", (double)sp->tot_qusz / dt); | |
129 | fprintf(iostat_ofp, "%7.2lf ", await); | |
130 | fprintf(iostat_ofp, "%7.2lf ", svctm); | |
131 | fprintf(iostat_ofp, "%6.2lf", p_util); | |
132 | if (all) | |
133 | fprintf(iostat_ofp, "%8s\n", "TOTAL"); | |
134 | else { | |
135 | fprintf(iostat_ofp, "%8.2lf\n", TO_SEC(stamp)); | |
136 | sp->rqm[0] = sp->rqm[1] = 0; | |
137 | sp->ios[0] = sp->ios[1] = 0; | |
138 | sp->sec[0] = sp->sec[1] = 0; | |
139 | sp->wait = sp->svctm = 0; | |
140 | ||
141 | sp->tot_qusz = sp->idle_time = 0.0; | |
21e47d90 | 142 | } |
4a5cddba JA |
143 | |
144 | if (asp) { | |
145 | int i; | |
146 | ||
147 | asp->n += 1.0; | |
148 | for (i = 0; i < 2; i++) { | |
149 | asp->rqm_s[i] += ((double)sp->rqm[i] / dt); | |
150 | asp->ios_s[i] += ((double)sp->ios[i] / dt); | |
151 | asp->sec_s[i] += ((double)sp->sec[i] / dt); | |
152 | } | |
153 | asp->avgrq_sz += avgrq_sz; | |
154 | asp->avgqu_sz += (double)sp->tot_qusz / dt; | |
155 | asp->await += await; | |
156 | asp->svctm += svctm; | |
157 | asp->p_util += p_util; | |
158 | } | |
159 | } | |
160 | ||
c053af42 | 161 | static void __dump_stats_t(__u64 stamp, struct stats_t *asp, int all) |
4a5cddba JA |
162 | { |
163 | if (asp->n < 2.0) return; // What's the point? | |
164 | ||
165 | fprintf(iostat_ofp, "%-11s ", "TOTAL"); | |
166 | fprintf(iostat_ofp, "%8.2lf ", asp->rqm_s[0]); | |
167 | fprintf(iostat_ofp, "%8.2lf ", asp->rqm_s[1]); | |
168 | fprintf(iostat_ofp, "%7.2lf ", asp->ios_s[0]); | |
169 | fprintf(iostat_ofp, "%7.2lf ", asp->ios_s[1]); | |
170 | fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[0]); | |
171 | fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[1]); | |
172 | fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[0] / 2.0); | |
173 | fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[1] / 2.0); | |
174 | fprintf(iostat_ofp, "%8.2lf ", asp->avgrq_sz / asp->n); | |
175 | fprintf(iostat_ofp, "%8.2lf ", asp->avgqu_sz / asp->n); | |
176 | fprintf(iostat_ofp, "%7.2lf ", asp->await / asp->n); | |
177 | fprintf(iostat_ofp, "%7.2lf ", asp->svctm / asp->n); | |
178 | fprintf(iostat_ofp, "%6.2lf", asp->p_util / asp->n); | |
179 | if (all) | |
180 | fprintf(iostat_ofp, "%8s\n", "TOTAL"); | |
181 | else | |
182 | fprintf(iostat_ofp, "%8.2lf\n", TO_SEC(stamp)); | |
21e47d90 ADB |
183 | } |
184 | ||
c053af42 AB |
185 | void iostat_init(void) |
186 | { | |
187 | last_start = (__u64)-1; | |
188 | if (iostat_ofp) | |
189 | dump_hdr(); | |
190 | } | |
191 | ||
21e47d90 ADB |
192 | void iostat_dump_stats(__u64 stamp, int all) |
193 | { | |
194 | struct d_info *dip; | |
4a5cddba | 195 | struct stats_t as; |
21e47d90 | 196 | |
4a5cddba | 197 | memset(&as, 0, sizeof(struct stats_t)); |
21e47d90 ADB |
198 | if (all) |
199 | dump_hdr(); | |
4a5cddba | 200 | |
21e47d90 ADB |
201 | if (devices == NULL) { |
202 | struct list_head *p; | |
203 | ||
204 | __list_for_each(p, &all_devs) { | |
6eb42155 | 205 | dip = list_entry(p, struct d_info, all_head); |
4a5cddba | 206 | __dump_stats(stamp, all, dip, &as); |
21e47d90 | 207 | } |
c053af42 | 208 | } else { |
21e47d90 ADB |
209 | int i; |
210 | unsigned int mjr, mnr; | |
211 | char *p = devices; | |
212 | ||
213 | while (p && ((i = sscanf(p, "%u,%u", &mjr, &mnr)) == 2)) { | |
214 | dip = __dip_find((__u32)((mjr << MINORBITS) | mnr)); | |
4a5cddba | 215 | __dump_stats(stamp, all, dip, &as); |
21e47d90 ADB |
216 | |
217 | p = strchr(p, ';'); | |
218 | if (p) p++; | |
219 | } | |
220 | } | |
4a5cddba JA |
221 | |
222 | __dump_stats_t(stamp, &as, all); | |
223 | ||
d216e9ce ADB |
224 | if (!all && iostat_ofp) |
225 | fprintf(iostat_ofp, "\n"); | |
21e47d90 ADB |
226 | } |
227 | ||
228 | void iostat_check_time(__u64 stamp) | |
229 | { | |
230 | if (iostat_ofp) { | |
231 | if (last_start == (__u64)-1) | |
232 | last_start = stamp; | |
233 | else if ((stamp - last_start) >= iostat_interval) { | |
234 | iostat_dump_stats(stamp, 0); | |
235 | last_start = stamp; | |
236 | } | |
237 | ||
238 | iostat_last_stamp = stamp; | |
239 | } | |
240 | } | |
241 | ||
4c48f14e | 242 | void iostat_getrq(struct io *iop) |
21e47d90 ADB |
243 | { |
244 | update_tot_qusz(iop->dip, TO_SEC(iop->t.time)); | |
245 | INC_STAT(iop->dip, cur_qusz); | |
246 | } | |
247 | ||
248 | void iostat_merge(struct io *iop) | |
249 | { | |
250 | INC_STAT(iop->dip, rqm[IOP_RW(iop)]); | |
251 | } | |
252 | ||
253 | void iostat_issue(struct io *iop) | |
254 | { | |
255 | int rw = IOP_RW(iop); | |
256 | struct d_info *dip = iop->dip; | |
257 | double now = TO_SEC(iop->t.time); | |
258 | ||
259 | INC_STAT(dip, ios[rw]); | |
260 | ADD_STAT(dip, sec[rw], iop->t.bytes >> 9); | |
261 | ||
d216e9ce | 262 | update_idle_time(dip, now, 0); |
21e47d90 ADB |
263 | INC_STAT(dip, cur_dev); |
264 | } | |
265 | ||
ae6d30f4 | 266 | void iostat_complete(struct io *q_iop, struct io *c_iop) |
6eb42155 ADB |
267 | { |
268 | double now = TO_SEC(c_iop->t.time); | |
ae6d30f4 | 269 | struct d_info *dip = q_iop->dip; |
21e47d90 | 270 | |
ae6d30f4 AB |
271 | if (q_iop->i_time != (__u64)-1) |
272 | ADD_STAT(c_iop->dip, wait, tdelta(q_iop->i_time,c_iop->t.time)); | |
273 | else if (q_iop->m_time != (__u64)-1) | |
274 | ADD_STAT(c_iop->dip, wait, tdelta(q_iop->m_time,c_iop->t.time)); | |
21e47d90 | 275 | |
6eb42155 ADB |
276 | update_tot_qusz(dip, now); |
277 | DEC_STAT(dip, cur_qusz); | |
278 | ||
279 | update_idle_time(dip, now, 0); | |
280 | DEC_STAT(dip, cur_dev); | |
281 | ||
ae6d30f4 | 282 | ADD_STAT(dip, svctm, tdelta(q_iop->t.time, c_iop->t.time)); |
21e47d90 | 283 | } |