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