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 */
12 struct 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 */
24 struct io_sample {
25 uint64_t time;
26 uint64_t val;
27 uint32_t ddir;
28 uint32_t bs;
29 };
30
31 enum {
32 IO_LOG_TYPE_LAT = 1,
33 IO_LOG_TYPE_CLAT,
34 IO_LOG_TYPE_SLAT,
35 IO_LOG_TYPE_BW,
36 IO_LOG_TYPE_IOPS,
37 };
38
39 /*
40 * Dynamically growing data sample log
41 */
42 struct io_log {
43 /*
44 * Entries already logged
45 */
46 unsigned long nr_samples;
47 unsigned long max_samples;
48 struct io_sample *log;
49
50 unsigned int log_type;
51
52 /*
53 * If we fail extending the log, stop collecting more entries.
54 */
55 unsigned int disabled;
56
57 /*
58 * Windowed average, for logging single entries average over some
59 * period of time.
60 */
61 struct io_stat avg_window[DDIR_RWDIR_CNT];
62 unsigned long avg_msec;
63 unsigned long avg_last;
64 };
65
66 enum {
67 IP_F_ONRB = 1,
68 IP_F_ONLIST = 2,
69 IP_F_TRIMMED = 4,
70 IP_F_IN_FLIGHT = 8,
71 };
72
73 /*
74 * When logging io actions, this matches a single sent io_u
75 */
76 struct io_piece {
77 union {
78 struct rb_node rb_node;
79 struct flist_head list;
80 };
81 struct flist_head trim_list;
82 union {
83 int fileno;
84 struct fio_file *file;
85 };
86 unsigned long long offset;
87 unsigned short numberio;
88 unsigned long len;
89 unsigned int flags;
90 enum fio_ddir ddir;
91 union {
92 unsigned long delay;
93 unsigned int file_action;
94 };
95 };
96
97 /*
98 * Log exports
99 */
100 enum file_log_act {
101 FIO_LOG_ADD_FILE,
102 FIO_LOG_OPEN_FILE,
103 FIO_LOG_CLOSE_FILE,
104 FIO_LOG_UNLINK_FILE,
105 };
106
107 struct io_u;
108 extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
109 extern void log_io_u(struct thread_data *, struct io_u *);
110 extern void log_file(struct thread_data *, struct fio_file *, enum file_log_act);
111 extern int __must_check init_iolog(struct thread_data *td);
112 extern void log_io_piece(struct thread_data *, struct io_u *);
113 extern void unlog_io_piece(struct thread_data *, struct io_u *);
114 extern void trim_io_piece(struct thread_data *, struct io_u *);
115 extern void queue_io_piece(struct thread_data *, struct io_piece *);
116 extern void prune_io_piece_log(struct thread_data *);
117 extern void write_iolog_close(struct thread_data *);
118
119 /*
120 * Logging
121 */
122 extern void finalize_logs(struct thread_data *td);
123 extern void add_lat_sample(struct thread_data *, enum fio_ddir, unsigned long,
124 unsigned int);
125 extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long,
126 unsigned int);
127 extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long,
128 unsigned int);
129 extern void add_bw_sample(struct thread_data *, enum fio_ddir, unsigned int,
130 struct timeval *);
131 extern void add_iops_sample(struct thread_data *, enum fio_ddir, unsigned int,
132 struct timeval *);
133 extern void init_disk_util(struct thread_data *);
134 extern void update_rusage_stat(struct thread_data *);
135 extern void setup_log(struct io_log **, unsigned long, int);
136 extern void __finish_log(struct io_log *, const char *);
137 extern struct io_log *agg_io_log[DDIR_RWDIR_CNT];
138 extern int write_bw_log;
139 extern void add_agg_sample(unsigned long, enum fio_ddir, unsigned int);
140 extern void fio_writeout_logs(struct thread_data *);
141
init_ipo(struct io_piece * ipo)142 static inline void init_ipo(struct io_piece *ipo)
143 {
144 memset(ipo, 0, sizeof(*ipo));
145 INIT_FLIST_HEAD(&ipo->trim_list);
146 }
147
148 #endif
149