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client: fix missing init of 'i'
[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/*
45 * Dynamically growing data sample log
46 */
47struct io_log {
48 /*
49 * Entries already logged
50 */
51 uint64_t nr_samples;
52 uint64_t max_samples;
53 void *log;
54
55 unsigned int log_type;
56
57 /*
58 * If we fail extending the log, stop collecting more entries.
59 */
60 unsigned int disabled;
61
62 /*
63 * Log offsets
64 */
65 unsigned int log_offset;
66
67 /*
68 * Windowed average, for logging single entries average over some
69 * period of time.
70 */
71 struct io_stat avg_window[DDIR_RWDIR_CNT];
72 unsigned long avg_msec;
73 unsigned long avg_last;
74};
75
76static inline size_t __log_entry_sz(int log_offset)
77{
78 if (log_offset)
79 return sizeof(struct io_sample_offset);
80 else
81 return sizeof(struct io_sample);
82}
83
84static inline size_t log_entry_sz(struct io_log *log)
85{
86 return __log_entry_sz(log->log_offset);
87}
88
89static inline struct io_sample *__get_sample(void *samples, int log_offset,
90 uint64_t sample)
91{
92 return samples + sample * __log_entry_sz(log_offset);
93}
94
95static inline struct io_sample *get_sample(struct io_log *iolog,
96 uint64_t sample)
97{
98 return __get_sample(iolog->log, iolog->log_offset, sample);
99}
100
101enum {
102 IP_F_ONRB = 1,
103 IP_F_ONLIST = 2,
104 IP_F_TRIMMED = 4,
105 IP_F_IN_FLIGHT = 8,
106};
107
108/*
109 * When logging io actions, this matches a single sent io_u
110 */
111struct io_piece {
112 union {
113 struct rb_node rb_node;
114 struct flist_head list;
115 };
116 struct flist_head trim_list;
117 union {
118 int fileno;
119 struct fio_file *file;
120 };
121 unsigned long long offset;
122 unsigned short numberio;
123 unsigned long len;
124 unsigned int flags;
125 enum fio_ddir ddir;
126 union {
127 unsigned long delay;
128 unsigned int file_action;
129 };
130};
131
132/*
133 * Log exports
134 */
135enum file_log_act {
136 FIO_LOG_ADD_FILE,
137 FIO_LOG_OPEN_FILE,
138 FIO_LOG_CLOSE_FILE,
139 FIO_LOG_UNLINK_FILE,
140};
141
142struct io_u;
143extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
144extern void log_io_u(struct thread_data *, struct io_u *);
145extern void log_file(struct thread_data *, struct fio_file *, enum file_log_act);
146extern int __must_check init_iolog(struct thread_data *td);
147extern void log_io_piece(struct thread_data *, struct io_u *);
148extern void unlog_io_piece(struct thread_data *, struct io_u *);
149extern void trim_io_piece(struct thread_data *, struct io_u *);
150extern void queue_io_piece(struct thread_data *, struct io_piece *);
151extern void prune_io_piece_log(struct thread_data *);
152extern void write_iolog_close(struct thread_data *);
153
154/*
155 * Logging
156 */
157extern void finalize_logs(struct thread_data *td);
158extern void add_lat_sample(struct thread_data *, enum fio_ddir, unsigned long,
159 unsigned int, uint64_t);
160extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long,
161 unsigned int, uint64_t);
162extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long,
163 unsigned int, uint64_t);
164extern void add_bw_sample(struct thread_data *, enum fio_ddir, unsigned int,
165 struct timeval *);
166extern void add_iops_sample(struct thread_data *, enum fio_ddir, unsigned int,
167 struct timeval *);
168extern void init_disk_util(struct thread_data *);
169extern void update_rusage_stat(struct thread_data *);
170extern void setup_log(struct io_log **, unsigned long, int, int);
171extern void __finish_log(struct io_log *, const char *);
172extern struct io_log *agg_io_log[DDIR_RWDIR_CNT];
173extern int write_bw_log;
174extern void add_agg_sample(unsigned long, enum fio_ddir, unsigned int);
175extern void fio_writeout_logs(struct thread_data *);
176
177static inline void init_ipo(struct io_piece *ipo)
178{
179 memset(ipo, 0, sizeof(*ipo));
180 INIT_FLIST_HEAD(&ipo->trim_list);
181}
182
183#endif
fio - Flexible IO Tester