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backend: dump state of stuck thread
[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
21/*
22 * A single data sample
23 */
24struct io_sample {
25 uint64_t time;
26 uint64_t val;
27 uint32_t __ddir;
28 uint32_t bs;
29};
30
31struct io_sample_offset {
32 struct io_sample s;
33 uint64_t offset;
34};
35
36enum {
37 IO_LOG_TYPE_LAT = 1,
38 IO_LOG_TYPE_CLAT,
39 IO_LOG_TYPE_SLAT,
40 IO_LOG_TYPE_BW,
41 IO_LOG_TYPE_IOPS,
42};
43
44#define DEF_LOG_ENTRIES 1024
45
46/*
47 * Dynamically growing data sample log
48 */
49struct io_log {
50 /*
51 * Entries already logged
52 */
53 uint64_t nr_samples;
54 uint64_t max_samples;
55 void *log;
56
57 unsigned int log_ddir_mask;
58
59 char *filename;
60
61 struct thread_data *td;
62
63 unsigned int log_type;
64
65 /*
66 * If we fail extending the log, stop collecting more entries.
67 */
68 unsigned int disabled;
69
70 /*
71 * Log offsets
72 */
73 unsigned int log_offset;
74
75 /*
76 * Max size of log entries before a chunk is compressed
77 */
78 unsigned int log_gz;
79
80 /*
81 * Don't deflate for storing, just store the compressed bits
82 */
83 unsigned int log_gz_store;
84
85 /*
86 * Windowed average, for logging single entries average over some
87 * period of time.
88 */
89 struct io_stat avg_window[DDIR_RWDIR_CNT];
90 unsigned long avg_msec;
91 unsigned long avg_last;
92
93 pthread_mutex_t chunk_lock;
94 unsigned int chunk_seq;
95 struct flist_head chunk_list;
96};
97
98/*
99 * If the upper bit is set, then we have the offset as well
100 */
101#define LOG_OFFSET_SAMPLE_BIT 0x80000000U
102#define io_sample_ddir(io) ((io)->__ddir & ~LOG_OFFSET_SAMPLE_BIT)
103
104static inline void io_sample_set_ddir(struct io_log *log,
105 struct io_sample *io,
106 enum fio_ddir ddir)
107{
108 io->__ddir = ddir | log->log_ddir_mask;
109}
110
111static inline size_t __log_entry_sz(int log_offset)
112{
113 if (log_offset)
114 return sizeof(struct io_sample_offset);
115 else
116 return sizeof(struct io_sample);
117}
118
119static inline size_t log_entry_sz(struct io_log *log)
120{
121 return __log_entry_sz(log->log_offset);
122}
123
124static inline struct io_sample *__get_sample(void *samples, int log_offset,
125 uint64_t sample)
126{
127 uint64_t sample_offset = sample * __log_entry_sz(log_offset);
128 return (struct io_sample *) ((char *) samples + sample_offset);
129}
130
131static inline struct io_sample *get_sample(struct io_log *iolog,
132 uint64_t sample)
133{
134 return __get_sample(iolog->log, iolog->log_offset, sample);
135}
136
137enum {
138 IP_F_ONRB = 1,
139 IP_F_ONLIST = 2,
140 IP_F_TRIMMED = 4,
141 IP_F_IN_FLIGHT = 8,
142};
143
144/*
145 * When logging io actions, this matches a single sent io_u
146 */
147struct io_piece {
148 union {
149 struct rb_node rb_node;
150 struct flist_head list;
151 };
152 struct flist_head trim_list;
153 union {
154 int fileno;
155 struct fio_file *file;
156 };
157 unsigned long long offset;
158 unsigned short numberio;
159 unsigned long len;
160 unsigned int flags;
161 enum fio_ddir ddir;
162 union {
163 unsigned long delay;
164 unsigned int file_action;
165 };
166};
167
168/*
169 * Log exports
170 */
171enum file_log_act {
172 FIO_LOG_ADD_FILE,
173 FIO_LOG_OPEN_FILE,
174 FIO_LOG_CLOSE_FILE,
175 FIO_LOG_UNLINK_FILE,
176};
177
178struct io_u;
179extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
180extern void log_io_u(const struct thread_data *, const struct io_u *);
181extern void log_file(struct thread_data *, struct fio_file *, enum file_log_act);
182extern int __must_check init_iolog(struct thread_data *td);
183extern void log_io_piece(struct thread_data *, struct io_u *);
184extern void unlog_io_piece(struct thread_data *, struct io_u *);
185extern void trim_io_piece(struct thread_data *, const struct io_u *);
186extern void queue_io_piece(struct thread_data *, struct io_piece *);
187extern void prune_io_piece_log(struct thread_data *);
188extern void write_iolog_close(struct thread_data *);
189extern int iolog_compress_init(struct thread_data *, struct sk_out *);
190extern void iolog_compress_exit(struct thread_data *);
191extern size_t log_chunk_sizes(struct io_log *);
192
193#ifdef CONFIG_ZLIB
194extern int iolog_file_inflate(const char *);
195#endif
196
197/*
198 * Logging
199 */
200struct log_params {
201 struct thread_data *td;
202 unsigned long avg_msec;
203 int log_type;
204 int log_offset;
205 int log_gz;
206 int log_gz_store;
207 int log_compress;
208};
209
210static inline bool per_unit_log(struct io_log *log)
211{
212 return log && !log->avg_msec;
213}
214
215extern void finalize_logs(struct thread_data *td, bool);
216extern void setup_log(struct io_log **, struct log_params *, const char *);
217extern void flush_log(struct io_log *, int);
218extern void flush_samples(FILE *, void *, uint64_t);
219extern void free_log(struct io_log *);
220extern void fio_writeout_logs(bool);
221extern void td_writeout_logs(struct thread_data *, bool);
222extern int iolog_flush(struct io_log *, int);
223
224static inline void init_ipo(struct io_piece *ipo)
225{
226 memset(ipo, 0, sizeof(*ipo));
227 INIT_FLIST_HEAD(&ipo->trim_list);
228}
229
230struct iolog_compress {
231 struct flist_head list;
232 void *buf;
233 size_t len;
234 unsigned int seq;
235};
236
237#endif
fio - Flexible IO Tester