md/dm-vdo/statistics.h

16 	/* The total number of slabs from which blocks may be allocated */
18 	/* The total number of slabs from which blocks have ever been allocated */
20 	/* The number of times since loading that a slab has been re-opened */
25  * Counters for tracking the number of items written (blocks, requests, etc.)
26  * that keep track of totals at steps in the write pipeline. Three counters
27  * allow the number of buffered, in-memory items and the number of in-flight,
32 	/* The total number of items on which processing has started */
34 	/* The total number of items for which a write operation has been issued */
36 	/* The total number of items for which a write operation has completed */
42 	/* Number of times the on-disk journal was full */
44 	/* Number of times the recovery journal requested slab journal commits. */
54 	/* Number of compressed data items written since startup */
56 	/* Number of blocks containing compressed items written since startup */
58 	/* Number of VIOs that are pending in the packer */
64 	/* Number of times the on-disk journal was full */
66 	/* Number of times an entry was added over the flush threshold */
68 	/* Number of times an entry was added over the block threshold */
70 	/* Number of times a tail block was written */
72 	/* Number of times we had to wait for the tail to write */
78 	/* Number of blocks written */
84 	/* Number of reference blocks written */
90 	/* number of dirty (resident) pages */
92 	/* number of clean (resident) pages */
94 	/* number of free pages */
96 	/* number of pages in failed state */
98 	/* number of pages incoming */
100 	/* number of pages outgoing */
104 	/* number of get_vdo_page() calls for read */
106 	/* number of get_vdo_page() calls for write */
108 	/* number of times pages failed to read */
110 	/* number of times pages failed to write */
112 	/* number of gets that are reclaimed */
114 	/* number of gets for outgoing pages */
116 	/* number of gets that were already there */
118 	/* number of gets requiring discard */
120 	/* number of gets enqueued for their page */
122 	/* number of gets that have to fetch */
124 	/* number of page fetches */
126 	/* number of page saves */
128 	/* the number of flushes issued */
134 	/* Number of times the UDS advice proved correct */
136 	/* Number of times the UDS advice proved incorrect */
138 	/* Number of writes with the same data as another in-flight write */
140 	/* Number of writes whose hash collided with an in-flight write */
142 	/* Current number of dedupe queries that are in flight */
146 /** Counts of error conditions in VDO. */
148 	/* number of times VDO got an invalid dedupe advice PBN from UDS */
150 	/* number of times a VIO completed with a VDO_NO_SPACE error */
152 	/* number of times a VIO completed with a VDO_READ_ONLY error */
157 	/* Number of REQ_OP_READ bios */
159 	/* Number of REQ_OP_WRITE bios with data */
161 	/* Number of bios tagged with REQ_PREFLUSH and containing no data */
163 	/* Number of REQ_OP_DISCARD bios */
165 	/* Number of bios tagged with REQ_PREFLUSH */
167 	/* Number of bios tagged with REQ_FUA */
180 	/* Number of records stored in the index */
182 	/* Number of post calls that found an existing entry */
184 	/* Number of post calls that added a new entry */
186 	/* Number of query calls that found an existing entry */
188 	/* Number of query calls that added a new entry */
190 	/* Number of update calls that found an existing entry */
192 	/* Number of update calls that added a new entry */
194 	/* Number of entries discarded */
198 /** The statistics of the vdo service. */
201 	/* Number of blocks used for data */
203 	/* Number of blocks used for VDO metadata */
205 	/* Number of logical blocks that are currently mapped to physical blocks */
207 	/* number of physical blocks */
209 	/* number of logical blocks */
211 	/* Size of the block map page cache, in bytes */
215 	/* Number of times the VDO has successfully recovered */
217 	/* Number of times the VDO has recovered from read-only mode */
219 	/* String describing the operating mode of the VDO */
223 	/* What percentage of recovery mode work has been completed */
241 	/* Counts of error conditions */
245 	/* Current number of active VIOs */
247 	/* Maximum number of active VIOs */
249 	/* Number of times the UDS index was too slow in responding */
251 	/* Number of flush requests submitted to the storage device */
270 	/* Current number of bios in progress */