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Fio 2.14
[fio.git] / iolog.h
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1#ifndef FIO_IOLOG_H
2#define FIO_IOLOG_H
3
4#include "lib/rbtree.h"
5#include "lib/ieee754.h"
6#include "flist.h"
7#include "ioengine.h"
8
9/*
10 * Use for maintaining statistics
11 */
12struct io_stat {
13 uint64_t max_val;
14 uint64_t min_val;
15 uint64_t samples;
16
17 fio_fp64_t mean;
18 fio_fp64_t S;
19};
20
21struct io_hist {
22 uint64_t samples;
23 unsigned long hist_last;
24 struct flist_head list;
25};
26
27/*
28 * A single data sample
29 */
30struct io_sample {
31 uint64_t time;
32 union {
33 uint64_t val;
34 struct io_u_plat_entry *plat_entry;
35 };
36 uint32_t __ddir;
37 uint32_t bs;
38};
39
40struct io_sample_offset {
41 struct io_sample s;
42 uint64_t offset;
43};
44
45enum {
46 IO_LOG_TYPE_LAT = 1,
47 IO_LOG_TYPE_CLAT,
48 IO_LOG_TYPE_SLAT,
49 IO_LOG_TYPE_BW,
50 IO_LOG_TYPE_IOPS,
51 IO_LOG_TYPE_HIST,
52};
53
54#define DEF_LOG_ENTRIES 1024
55#define MAX_LOG_ENTRIES (1024 * DEF_LOG_ENTRIES)
56
57struct io_logs {
58 struct flist_head list;
59 uint64_t nr_samples;
60 uint64_t max_samples;
61 void *log;
62};
63
64/*
65 * Dynamically growing data sample log
66 */
67struct io_log {
68 /*
69 * Entries already logged
70 */
71 struct flist_head io_logs;
72 uint32_t cur_log_max;
73
74 /*
75 * When the current log runs out of space, store events here until
76 * we have a chance to regrow
77 */
78 struct io_logs *pending;
79
80 unsigned int log_ddir_mask;
81
82 char *filename;
83
84 struct thread_data *td;
85
86 unsigned int log_type;
87
88 /*
89 * If we fail extending the log, stop collecting more entries.
90 */
91 bool disabled;
92
93 /*
94 * Log offsets
95 */
96 unsigned int log_offset;
97
98 /*
99 * Max size of log entries before a chunk is compressed
100 */
101 unsigned int log_gz;
102
103 /*
104 * Don't deflate for storing, just store the compressed bits
105 */
106 unsigned int log_gz_store;
107
108 /*
109 * Windowed average, for logging single entries average over some
110 * period of time.
111 */
112 struct io_stat avg_window[DDIR_RWDIR_CNT];
113 unsigned long avg_msec;
114 unsigned long avg_last;
115
116 /*
117 * Windowed latency histograms, for keeping track of when we need to
118 * save a copy of the histogram every approximately hist_msec
119 * milliseconds.
120 */
121 struct io_hist hist_window[DDIR_RWDIR_CNT];
122 unsigned long hist_msec;
123 unsigned int hist_coarseness;
124
125 pthread_mutex_t chunk_lock;
126 unsigned int chunk_seq;
127 struct flist_head chunk_list;
128};
129
130/*
131 * If the upper bit is set, then we have the offset as well
132 */
133#define LOG_OFFSET_SAMPLE_BIT 0x80000000U
134#define io_sample_ddir(io) ((io)->__ddir & ~LOG_OFFSET_SAMPLE_BIT)
135
136static inline void io_sample_set_ddir(struct io_log *log,
137 struct io_sample *io,
138 enum fio_ddir ddir)
139{
140 io->__ddir = ddir | log->log_ddir_mask;
141}
142
143static inline size_t __log_entry_sz(int log_offset)
144{
145 if (log_offset)
146 return sizeof(struct io_sample_offset);
147 else
148 return sizeof(struct io_sample);
149}
150
151static inline size_t log_entry_sz(struct io_log *log)
152{
153 return __log_entry_sz(log->log_offset);
154}
155
156static inline size_t log_sample_sz(struct io_log *log, struct io_logs *cur_log)
157{
158 return cur_log->nr_samples * log_entry_sz(log);
159}
160
161static inline struct io_sample *__get_sample(void *samples, int log_offset,
162 uint64_t sample)
163{
164 uint64_t sample_offset = sample * __log_entry_sz(log_offset);
165 return (struct io_sample *) ((char *) samples + sample_offset);
166}
167
168struct io_logs *iolog_cur_log(struct io_log *);
169uint64_t iolog_nr_samples(struct io_log *);
170void regrow_logs(struct thread_data *);
171
172static inline struct io_sample *get_sample(struct io_log *iolog,
173 struct io_logs *cur_log,
174 uint64_t sample)
175{
176 return __get_sample(cur_log->log, iolog->log_offset, sample);
177}
178
179enum {
180 IP_F_ONRB = 1,
181 IP_F_ONLIST = 2,
182 IP_F_TRIMMED = 4,
183 IP_F_IN_FLIGHT = 8,
184};
185
186/*
187 * When logging io actions, this matches a single sent io_u
188 */
189struct io_piece {
190 union {
191 struct rb_node rb_node;
192 struct flist_head list;
193 };
194 struct flist_head trim_list;
195 union {
196 int fileno;
197 struct fio_file *file;
198 };
199 unsigned long long offset;
200 unsigned short numberio;
201 unsigned long len;
202 unsigned int flags;
203 enum fio_ddir ddir;
204 union {
205 unsigned long delay;
206 unsigned int file_action;
207 };
208};
209
210/*
211 * Log exports
212 */
213enum file_log_act {
214 FIO_LOG_ADD_FILE,
215 FIO_LOG_OPEN_FILE,
216 FIO_LOG_CLOSE_FILE,
217 FIO_LOG_UNLINK_FILE,
218};
219
220struct io_u;
221extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
222extern void log_io_u(const struct thread_data *, const struct io_u *);
223extern void log_file(struct thread_data *, struct fio_file *, enum file_log_act);
224extern int __must_check init_iolog(struct thread_data *td);
225extern void log_io_piece(struct thread_data *, struct io_u *);
226extern void unlog_io_piece(struct thread_data *, struct io_u *);
227extern void trim_io_piece(struct thread_data *, const struct io_u *);
228extern void queue_io_piece(struct thread_data *, struct io_piece *);
229extern void prune_io_piece_log(struct thread_data *);
230extern void write_iolog_close(struct thread_data *);
231extern int iolog_compress_init(struct thread_data *, struct sk_out *);
232extern void iolog_compress_exit(struct thread_data *);
233extern size_t log_chunk_sizes(struct io_log *);
234
235#ifdef CONFIG_ZLIB
236extern int iolog_file_inflate(const char *);
237#endif
238
239/*
240 * Logging
241 */
242struct log_params {
243 struct thread_data *td;
244 unsigned long avg_msec;
245 unsigned long hist_msec;
246 int hist_coarseness;
247 int log_type;
248 int log_offset;
249 int log_gz;
250 int log_gz_store;
251 int log_compress;
252};
253
254static inline bool per_unit_log(struct io_log *log)
255{
256 return log && !log->avg_msec;
257}
258
259static inline bool inline_log(struct io_log *log)
260{
261 return log->log_type == IO_LOG_TYPE_LAT ||
262 log->log_type == IO_LOG_TYPE_CLAT ||
263 log->log_type == IO_LOG_TYPE_SLAT;
264}
265
266extern void finalize_logs(struct thread_data *td, bool);
267extern void setup_log(struct io_log **, struct log_params *, const char *);
268extern void flush_log(struct io_log *, bool);
269extern void flush_samples(FILE *, void *, uint64_t);
270extern unsigned long hist_sum(int, int, unsigned int *, unsigned int *);
271extern void free_log(struct io_log *);
272extern void fio_writeout_logs(bool);
273extern void td_writeout_logs(struct thread_data *, bool);
274extern int iolog_cur_flush(struct io_log *, struct io_logs *);
275
276static inline void init_ipo(struct io_piece *ipo)
277{
278 memset(ipo, 0, sizeof(*ipo));
279 INIT_FLIST_HEAD(&ipo->trim_list);
280}
281
282struct iolog_compress {
283 struct flist_head list;
284 void *buf;
285 size_t len;
286 unsigned int seq;
287};
288
289#endif
fio - Flexible IO Tester