Update fio io engine version
[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;
4b87898e 32 struct rb_node *n;
3c39a379 33
4b87898e
JA
34 while ((n = rb_first(&td->io_hist_tree)) != NULL) {
35 ipo = rb_entry(n, struct io_piece, rb_node);
36 rb_erase(n, &td->io_hist_tree);
3c39a379
JA
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{
8de8f047 46 struct rb_node **p, *parent;
4b87898e 47 struct io_piece *ipo, *__ipo;
3c39a379 48
4b87898e 49 ipo = malloc(sizeof(struct io_piece));
53cdc686 50 ipo->file = io_u->file;
3c39a379
JA
51 ipo->offset = io_u->offset;
52 ipo->len = io_u->buflen;
53
8de8f047
JA
54 /*
55 * We don't need to sort the entries, if:
56 *
57 * Sequential writes, or
58 * Random writes that lay out the file as it goes along
59 *
60 * For both these cases, just reading back data in the order we
61 * wrote it out is the fastest.
62 */
160b966d
JA
63 if (!td_random(td) || !td->o.overwrite ||
64 (io_u->file->flags & FIO_FILE_NOSORT)) {
8de8f047
JA
65 INIT_LIST_HEAD(&ipo->list);
66 list_add_tail(&ipo->list, &td->io_hist_list);
67 return;
68 }
69
70 RB_CLEAR_NODE(&ipo->rb_node);
71 p = &td->io_hist_tree.rb_node;
72 parent = NULL;
73
3c39a379 74 /*
4b87898e 75 * Sort the entry into the verification list
3c39a379 76 */
4b87898e
JA
77 while (*p) {
78 parent = *p;
79
80 __ipo = rb_entry(parent, struct io_piece, rb_node);
bb5d7d0b 81 if (ipo->offset <= __ipo->offset)
4b87898e 82 p = &(*p)->rb_left;
4b87898e 83 else
bb5d7d0b 84 p = &(*p)->rb_right;
3c39a379
JA
85 }
86
4b87898e
JA
87 rb_link_node(&ipo->rb_node, parent, p);
88 rb_insert_color(&ipo->rb_node, &td->io_hist_tree);
3c39a379
JA
89}
90
91void write_iolog_close(struct thread_data *td)
92{
93 fflush(td->iolog_f);
94 fclose(td->iolog_f);
95 free(td->iolog_buf);
96}
97
fb71fbd7
JA
98/*
99 * Open a stored log and read in the entries.
100 */
101static int init_iolog_read(struct thread_data *td)
3c39a379
JA
102{
103 unsigned long long offset;
104 unsigned int bytes;
105 char *str, *p;
106 FILE *f;
fb71fbd7 107 int rw, reads, writes;
3c39a379 108
2dc1bbeb 109 f = fopen(td->o.read_iolog_file, "r");
3c39a379 110 if (!f) {
fb71fbd7 111 perror("fopen read iolog");
3c39a379
JA
112 return 1;
113 }
114
3c39a379
JA
115 /*
116 * Read in the read iolog and store it, reuse the infrastructure
117 * for doing verifications.
118 */
119 str = malloc(4096);
fb71fbd7 120 reads = writes = 0;
3c39a379
JA
121 while ((p = fgets(str, 4096, f)) != NULL) {
122 struct io_piece *ipo;
123
124 if (sscanf(p, "%d,%llu,%u", &rw, &offset, &bytes) != 3) {
3b70d7e5 125 log_err("bad iolog: %s\n", p);
3c39a379
JA
126 continue;
127 }
128 if (rw == DDIR_READ)
129 reads++;
130 else if (rw == DDIR_WRITE)
131 writes++;
c38e9468 132 else if (rw != DDIR_SYNC) {
3b70d7e5 133 log_err("bad ddir: %d\n", rw);
3c39a379
JA
134 continue;
135 }
136
137 ipo = malloc(sizeof(*ipo));
138 INIT_LIST_HEAD(&ipo->list);
139 ipo->offset = offset;
140 ipo->len = bytes;
1e97cce9 141 ipo->ddir = (enum fio_ddir) rw;
2dc1bbeb
JA
142 if (bytes > td->o.max_bs[rw])
143 td->o.max_bs[rw] = bytes;
3c39a379 144 list_add_tail(&ipo->list, &td->io_log_list);
3c39a379
JA
145 }
146
147 free(str);
148 fclose(f);
149
fb71fbd7 150 if (!reads && !writes)
3c39a379 151 return 1;
fb71fbd7 152 else if (reads && !writes)
2dc1bbeb 153 td->o.td_ddir = TD_DDIR_READ;
3c39a379 154 else if (!reads && writes)
2dc1bbeb 155 td->o.td_ddir = TD_DDIR_READ;
3c39a379 156 else
2dc1bbeb 157 td->o.td_ddir = TD_DDIR_RW;
3c39a379
JA
158
159 return 0;
160}
8914a9d8 161
fb71fbd7
JA
162/*
163 * Setup a log for storing io patterns.
164 */
165static int init_iolog_write(struct thread_data *td)
166{
076efc7c 167 FILE *f;
fb71fbd7 168
2dc1bbeb 169 f = fopen(td->o.write_iolog_file, "w+");
fb71fbd7
JA
170 if (!f) {
171 perror("fopen write iolog");
172 return 1;
173 }
174
175 /*
176 * That's it for writing, setup a log buffer and we're done.
177 */
178 td->iolog_f = f;
179 td->iolog_buf = malloc(8192);
180 setvbuf(f, td->iolog_buf, _IOFBF, 8192);
181 return 0;
182}
183
184int init_iolog(struct thread_data *td)
185{
b4a6a59a
JA
186 int ret = 0;
187
ba0fbe10 188 if (td->io_ops->flags & FIO_DISKLESSIO)
f48b467c
JA
189 return 0;
190
2dc1bbeb 191 if (td->o.read_iolog_file)
b4a6a59a 192 ret = init_iolog_read(td);
2dc1bbeb 193 else if (td->o.write_iolog_file)
b4a6a59a 194 ret = init_iolog_write(td);
fb71fbd7 195
1e97cce9 196 return ret;
fb71fbd7
JA
197}
198
8914a9d8
JA
199void setup_log(struct io_log **log)
200{
201 struct io_log *l = malloc(sizeof(*l));
202
203 l->nr_samples = 0;
204 l->max_samples = 1024;
205 l->log = malloc(l->max_samples * sizeof(struct io_sample));
206 *log = l;
207}
208
bb3884d8 209void __finish_log(struct io_log *log, const char *name)
8914a9d8 210{
8914a9d8 211 unsigned int i;
bb3884d8 212 FILE *f;
8914a9d8 213
bb3884d8 214 f = fopen(name, "w");
8914a9d8
JA
215 if (!f) {
216 perror("fopen log");
217 return;
218 }
219
220 for (i = 0; i < log->nr_samples; i++)
221 fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val, log->log[i].ddir);
222
223 fclose(f);
224 free(log->log);
225 free(log);
226}
bb3884d8
JA
227
228void finish_log(struct thread_data *td, struct io_log *log, const char *name)
229{
230 char file_name[256];
231
232 snprintf(file_name, 200, "client%d_%s.log", td->thread_number, name);
233 __finish_log(log, file_name);
234}