projects / fio.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
blktrace: Fix replay_align 32 bit truncation
[fio.git] / iolog.h
... / ...
CommitLineData
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
28union io_sample_data {
29 uint64_t val;
30 struct io_u_plat_entry *plat_entry;
31};
32
33#define sample_val(value) ((union io_sample_data) { .val = value })
34#define sample_plat(plat) ((union io_sample_data) { .plat_entry = plat })
35
36/*
37 * A single data sample
38 */
39struct io_sample {
40 uint64_t time;
41 union io_sample_data data;
42 uint32_t __ddir;
43 uint32_t bs;
44};
45
46struct io_sample_offset {
47 struct io_sample s;
48 uint64_t offset;
49};
50
51enum {
52 IO_LOG_TYPE_LAT = 1,
53 IO_LOG_TYPE_CLAT,
54 IO_LOG_TYPE_SLAT,
55 IO_LOG_TYPE_BW,
56 IO_LOG_TYPE_IOPS,
57 IO_LOG_TYPE_HIST,
58};
59
60#define DEF_LOG_ENTRIES 1024
61#define MAX_LOG_ENTRIES (1024 * DEF_LOG_ENTRIES)
62
63struct io_logs {
64 struct flist_head list;
65 uint64_t nr_samples;
66 uint64_t max_samples;
67 void *log;
68};
69
70/*
71 * Dynamically growing data sample log
72 */
73struct io_log {
74 /*
75 * Entries already logged
76 */
77 struct flist_head io_logs;
78 uint32_t cur_log_max;
79
80 /*
81 * When the current log runs out of space, store events here until
82 * we have a chance to regrow
83 */
84 struct io_logs *pending;
85
86 unsigned int log_ddir_mask;
87
88 char *filename;
89
90 struct thread_data *td;
91
92 unsigned int log_type;
93
94 /*
95 * If we fail extending the log, stop collecting more entries.
96 */
97 bool disabled;
98
99 /*
100 * Log offsets
101 */
102 unsigned int log_offset;
103
104 /*
105 * Max size of log entries before a chunk is compressed
106 */
107 unsigned int log_gz;
108
109 /*
110 * Don't deflate for storing, just store the compressed bits
111 */
112 unsigned int log_gz_store;
113
114 /*
115 * Windowed average, for logging single entries average over some
116 * period of time.
117 */
118 struct io_stat avg_window[DDIR_RWDIR_CNT];
119 unsigned long avg_msec;
120 unsigned long avg_last;
121
122 /*
123 * Windowed latency histograms, for keeping track of when we need to
124 * save a copy of the histogram every approximately hist_msec
125 * milliseconds.
126 */
127 struct io_hist hist_window[DDIR_RWDIR_CNT];
128 unsigned long hist_msec;
129 unsigned int hist_coarseness;
130
131 pthread_mutex_t chunk_lock;
132 unsigned int chunk_seq;
133 struct flist_head chunk_list;
134};
135
136/*
137 * If the upper bit is set, then we have the offset as well
138 */
139#define LOG_OFFSET_SAMPLE_BIT 0x80000000U
140#define io_sample_ddir(io) ((io)->__ddir & ~LOG_OFFSET_SAMPLE_BIT)
141
142static inline void io_sample_set_ddir(struct io_log *log,
143 struct io_sample *io,
144 enum fio_ddir ddir)
145{
146 io->__ddir = ddir | log->log_ddir_mask;
147}
148
149static inline size_t __log_entry_sz(int log_offset)
150{
151 if (log_offset)
152 return sizeof(struct io_sample_offset);
153 else
154 return sizeof(struct io_sample);
155}
156
157static inline size_t log_entry_sz(struct io_log *log)
158{
159 return __log_entry_sz(log->log_offset);
160}
161
162static inline size_t log_sample_sz(struct io_log *log, struct io_logs *cur_log)
163{
164 return cur_log->nr_samples * log_entry_sz(log);
165}
166
167static inline struct io_sample *__get_sample(void *samples, int log_offset,
168 uint64_t sample)
169{
170 uint64_t sample_offset = sample * __log_entry_sz(log_offset);
171 return (struct io_sample *) ((char *) samples + sample_offset);
172}
173
174struct io_logs *iolog_cur_log(struct io_log *);
175uint64_t iolog_nr_samples(struct io_log *);
176void regrow_logs(struct thread_data *);
177
178static inline struct io_sample *get_sample(struct io_log *iolog,
179 struct io_logs *cur_log,
180 uint64_t sample)
181{
182 return __get_sample(cur_log->log, iolog->log_offset, sample);
183}
184
185enum {
186 IP_F_ONRB = 1,
187 IP_F_ONLIST = 2,
188 IP_F_TRIMMED = 4,
189 IP_F_IN_FLIGHT = 8,
190};
191
192/*
193 * When logging io actions, this matches a single sent io_u
194 */
195struct io_piece {
196 union {
197 struct rb_node rb_node;
198 struct flist_head list;
199 };
200 struct flist_head trim_list;
201 union {
202 int fileno;
203 struct fio_file *file;
204 };
205 unsigned long long offset;
206 unsigned short numberio;
207 unsigned long len;
208 unsigned int flags;
209 enum fio_ddir ddir;
210 union {
211 unsigned long delay;
212 unsigned int file_action;
213 };
214};
215
216/*
217 * Log exports
218 */
219enum file_log_act {
220 FIO_LOG_ADD_FILE,
221 FIO_LOG_OPEN_FILE,
222 FIO_LOG_CLOSE_FILE,
223 FIO_LOG_UNLINK_FILE,
224};
225
226struct io_u;
227extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
228extern void log_io_u(const struct thread_data *, const struct io_u *);
229extern void log_file(struct thread_data *, struct fio_file *, enum file_log_act);
230extern int __must_check init_iolog(struct thread_data *td);
231extern void log_io_piece(struct thread_data *, struct io_u *);
232extern void unlog_io_piece(struct thread_data *, struct io_u *);
233extern void trim_io_piece(struct thread_data *, const struct io_u *);
234extern void queue_io_piece(struct thread_data *, struct io_piece *);
235extern void prune_io_piece_log(struct thread_data *);
236extern void write_iolog_close(struct thread_data *);
237extern int iolog_compress_init(struct thread_data *, struct sk_out *);
238extern void iolog_compress_exit(struct thread_data *);
239extern size_t log_chunk_sizes(struct io_log *);
240
241#ifdef CONFIG_ZLIB
242extern int iolog_file_inflate(const char *);
243#endif
244
245/*
246 * Logging
247 */
248struct log_params {
249 struct thread_data *td;
250 unsigned long avg_msec;
251 unsigned long hist_msec;
252 int hist_coarseness;
253 int log_type;
254 int log_offset;
255 int log_gz;
256 int log_gz_store;
257 int log_compress;
258};
259
260static inline bool per_unit_log(struct io_log *log)
261{
262 return log && !log->avg_msec;
263}
264
265static inline bool inline_log(struct io_log *log)
266{
267 return log->log_type == IO_LOG_TYPE_LAT ||
268 log->log_type == IO_LOG_TYPE_CLAT ||
269 log->log_type == IO_LOG_TYPE_SLAT;
270}
271
272extern void finalize_logs(struct thread_data *td, bool);
273extern void setup_log(struct io_log **, struct log_params *, const char *);
274extern void flush_log(struct io_log *, bool);
275extern void flush_samples(FILE *, void *, uint64_t);
276extern unsigned long hist_sum(int, int, unsigned int *, unsigned int *);
277extern void free_log(struct io_log *);
278extern void fio_writeout_logs(bool);
279extern void td_writeout_logs(struct thread_data *, bool);
280extern int iolog_cur_flush(struct io_log *, struct io_logs *);
281
282static inline void init_ipo(struct io_piece *ipo)
283{
284 memset(ipo, 0, sizeof(*ipo));
285 INIT_FLIST_HEAD(&ipo->trim_list);
286}
287
288struct iolog_compress {
289 struct flist_head list;
290 void *buf;
291 size_t len;
292 unsigned int seq;
293};
294
295#endif
fio - Flexible IO Tester