Spelling fixes
[fio.git] / log.c
CommitLineData
3c39a379
JA
1#include <stdio.h>
2#include <stdlib.h>
3#include "list.h"
4#include "fio.h"
5
6void write_iolog_put(struct thread_data *td, struct io_u *io_u)
7{
a4f4fdd7 8 fprintf(td->iolog_f, "%u,%llu,%lu\n", io_u->ddir, io_u->offset, io_u->buflen);
3c39a379
JA
9}
10
11int read_iolog_get(struct thread_data *td, struct io_u *io_u)
12{
13 struct io_piece *ipo;
14
15 if (!list_empty(&td->io_log_list)) {
16 ipo = list_entry(td->io_log_list.next, struct io_piece, list);
17 list_del(&ipo->list);
18 io_u->offset = ipo->offset;
19 io_u->buflen = ipo->len;
20 io_u->ddir = ipo->ddir;
53cdc686 21 io_u->file = ipo->file;
3c39a379
JA
22 free(ipo);
23 return 0;
24 }
25
26 return 1;
27}
28
29void prune_io_piece_log(struct thread_data *td)
30{
31 struct io_piece *ipo;
32
33 while (!list_empty(&td->io_hist_list)) {
34 ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
35
36 list_del(&ipo->list);
37 free(ipo);
38 }
39}
40
41/*
34403fb1 42 * log a successful write, so we can unwind the log for verify
3c39a379
JA
43 */
44void log_io_piece(struct thread_data *td, struct io_u *io_u)
45{
46 struct io_piece *ipo = malloc(sizeof(struct io_piece));
47 struct list_head *entry;
48
49 INIT_LIST_HEAD(&ipo->list);
53cdc686 50 ipo->file = io_u->file;
3c39a379
JA
51 ipo->offset = io_u->offset;
52 ipo->len = io_u->buflen;
53
54 /*
55 * for random io where the writes extend the file, it will typically
56 * be laid out with the block scattered as written. it's faster to
57 * read them in in that order again, so don't sort
58 */
413dd459 59 if (!td_random(td) || !td->overwrite) {
3c39a379
JA
60 list_add_tail(&ipo->list, &td->io_hist_list);
61 return;
62 }
63
64 /*
65 * for random io, sort the list so verify will run faster
66 */
67 entry = &td->io_hist_list;
68 while ((entry = entry->prev) != &td->io_hist_list) {
69 struct io_piece *__ipo = list_entry(entry, struct io_piece, list);
70
71 if (__ipo->offset < ipo->offset)
72 break;
73 }
74
75 list_add(&ipo->list, entry);
76}
77
78void write_iolog_close(struct thread_data *td)
79{
80 fflush(td->iolog_f);
81 fclose(td->iolog_f);
82 free(td->iolog_buf);
83}
84
fb71fbd7
JA
85/*
86 * Open a stored log and read in the entries.
87 */
88static int init_iolog_read(struct thread_data *td)
3c39a379
JA
89{
90 unsigned long long offset;
91 unsigned int bytes;
92 char *str, *p;
93 FILE *f;
fb71fbd7 94 int rw, reads, writes;
3c39a379 95
076efc7c 96 f = fopen(td->read_iolog_file, "r");
3c39a379 97 if (!f) {
fb71fbd7 98 perror("fopen read iolog");
3c39a379
JA
99 return 1;
100 }
101
3c39a379
JA
102 /*
103 * Read in the read iolog and store it, reuse the infrastructure
104 * for doing verifications.
105 */
106 str = malloc(4096);
fb71fbd7 107 reads = writes = 0;
3c39a379
JA
108 while ((p = fgets(str, 4096, f)) != NULL) {
109 struct io_piece *ipo;
110
111 if (sscanf(p, "%d,%llu,%u", &rw, &offset, &bytes) != 3) {
3b70d7e5 112 log_err("bad iolog: %s\n", p);
3c39a379
JA
113 continue;
114 }
115 if (rw == DDIR_READ)
116 reads++;
117 else if (rw == DDIR_WRITE)
118 writes++;
119 else {
3b70d7e5 120 log_err("bad ddir: %d\n", rw);
3c39a379
JA
121 continue;
122 }
123
124 ipo = malloc(sizeof(*ipo));
125 INIT_LIST_HEAD(&ipo->list);
126 ipo->offset = offset;
127 ipo->len = bytes;
1e97cce9 128 ipo->ddir = (enum fio_ddir) rw;
a00735e6
JA
129 if (bytes > td->max_bs[rw])
130 td->max_bs[rw] = bytes;
3c39a379 131 list_add_tail(&ipo->list, &td->io_log_list);
3c39a379
JA
132 }
133
134 free(str);
135 fclose(f);
136
fb71fbd7 137 if (!reads && !writes)
3c39a379 138 return 1;
fb71fbd7 139 else if (reads && !writes)
413dd459 140 td->td_ddir = TD_DDIR_READ;
3c39a379 141 else if (!reads && writes)
413dd459 142 td->td_ddir = TD_DDIR_READ;
3c39a379 143 else
413dd459 144 td->td_ddir = TD_DDIR_RW;
3c39a379
JA
145
146 return 0;
147}
8914a9d8 148
fb71fbd7
JA
149/*
150 * Setup a log for storing io patterns.
151 */
152static int init_iolog_write(struct thread_data *td)
153{
076efc7c 154 FILE *f;
fb71fbd7 155
076efc7c 156 f = fopen(td->write_iolog_file, "w+");
fb71fbd7
JA
157 if (!f) {
158 perror("fopen write iolog");
159 return 1;
160 }
161
162 /*
163 * That's it for writing, setup a log buffer and we're done.
164 */
165 td->iolog_f = f;
166 td->iolog_buf = malloc(8192);
167 setvbuf(f, td->iolog_buf, _IOFBF, 8192);
168 return 0;
169}
170
171int init_iolog(struct thread_data *td)
172{
b4a6a59a
JA
173 int ret = 0;
174
f48b467c
JA
175 if (td->io_ops->flags & FIO_CPUIO)
176 return 0;
177
076efc7c 178 if (td->read_iolog_file)
b4a6a59a 179 ret = init_iolog_read(td);
076efc7c 180 else if (td->write_iolog_file)
b4a6a59a 181 ret = init_iolog_write(td);
fb71fbd7 182
1e97cce9 183 return ret;
fb71fbd7
JA
184}
185
8914a9d8
JA
186int setup_rate(struct thread_data *td)
187{
fb44a18f
JA
188 unsigned long long rate;
189 int nr_reads_per_msec;
c3852ae2 190 unsigned int bs;
8914a9d8
JA
191
192 if (!td->rate)
193 return 0;
194
195 if (td->rate < td->ratemin) {
3b70d7e5 196 log_err("min rate larger than nominal rate\n");
8914a9d8
JA
197 return -1;
198 }
199
c3852ae2
JA
200 if (td_rw(td))
201 bs = td->rw_min_bs;
202 else if (td_read(td))
203 bs = td->min_bs[DDIR_READ];
204 else
205 bs = td->min_bs[DDIR_WRITE];
206
fb44a18f 207 rate = td->rate;
c3852ae2 208 nr_reads_per_msec = (rate * 1024 * 1000) / bs;
fb44a18f
JA
209 if (!nr_reads_per_msec) {
210 log_err("rate lower than supported\n");
211 return -1;
212 }
213
214 td->rate_usec_cycle = 1000000000ULL / nr_reads_per_msec;
8914a9d8
JA
215 td->rate_pending_usleep = 0;
216 return 0;
217}
218
219void setup_log(struct io_log **log)
220{
221 struct io_log *l = malloc(sizeof(*l));
222
223 l->nr_samples = 0;
224 l->max_samples = 1024;
225 l->log = malloc(l->max_samples * sizeof(struct io_sample));
226 *log = l;
227}
228
bb3884d8 229void __finish_log(struct io_log *log, const char *name)
8914a9d8 230{
8914a9d8 231 unsigned int i;
bb3884d8 232 FILE *f;
8914a9d8 233
bb3884d8 234 f = fopen(name, "w");
8914a9d8
JA
235 if (!f) {
236 perror("fopen log");
237 return;
238 }
239
240 for (i = 0; i < log->nr_samples; i++)
241 fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val, log->log[i].ddir);
242
243 fclose(f);
244 free(log->log);
245 free(log);
246}
bb3884d8
JA
247
248void finish_log(struct thread_data *td, struct io_log *log, const char *name)
249{
250 char file_name[256];
251
252 snprintf(file_name, 200, "client%d_%s.log", td->thread_number, name);
253 __finish_log(log, file_name);
254}