/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright 2023 Red Hat */ #ifndef STATISTICS_H #define STATISTICS_H #include "types.h" enum { STATISTICS_VERSION = 36, }; struct block_allocator_statistics { /* The total number of slabs from which blocks may be allocated */ u64 slab_count; /* The total number of slabs from which blocks have ever been allocated */ u64 slabs_opened; /* The number of times since loading that a slab has been re-opened */ u64 slabs_reopened; }; /** * Counters for tracking the number of items written (blocks, requests, etc.) * that keep track of totals at steps in the write pipeline. Three counters * allow the number of buffered, in-memory items and the number of in-flight, * unacknowledged writes to be derived, while still tracking totals for * reporting purposes */ struct commit_statistics { /* The total number of items on which processing has started */ u64 started; /* The total number of items for which a write operation has been issued */ u64 written; /* The total number of items for which a write operation has completed */ u64 committed; }; /** Counters for events in the recovery journal */ struct recovery_journal_statistics { /* Number of times the on-disk journal was full */ u64 disk_full; /* Number of times the recovery journal requested slab journal commits. */ u64 slab_journal_commits_requested; /* Write/Commit totals for individual journal entries */ struct commit_statistics entries; /* Write/Commit totals for journal blocks */ struct commit_statistics blocks; }; /** The statistics for the compressed block packer. */ struct packer_statistics { /* Number of compressed data items written since startup */ u64 compressed_fragments_written; /* Number of blocks containing compressed items written since startup */ u64 compressed_blocks_written; /* Number of VIOs that are pending in the packer */ u64 compressed_fragments_in_packer; }; /** The statistics for the slab journals. */ struct slab_journal_statistics { /* Number of times the on-disk journal was full */ u64 disk_full_count; /* Number of times an entry was added over the flush threshold */ u64 flush_count; /* Number of times an entry was added over the block threshold */ u64 blocked_count; /* Number of times a tail block was written */ u64 blocks_written; /* Number of times we had to wait for the tail to write */ u64 tail_busy_count; }; /** The statistics for the slab summary. */ struct slab_summary_statistics { /* Number of blocks written */ u64 blocks_written; }; /** The statistics for the reference counts. */ struct ref_counts_statistics { /* Number of reference blocks written */ u64 blocks_written; }; /** The statistics for the block map. */ struct block_map_statistics { /* number of dirty (resident) pages */ u32 dirty_pages; /* number of clean (resident) pages */ u32 clean_pages; /* number of free pages */ u32 free_pages; /* number of pages in failed state */ u32 failed_pages; /* number of pages incoming */ u32 incoming_pages; /* number of pages outgoing */ u32 outgoing_pages; /* how many times free page not avail */ u32 cache_pressure; /* number of get_vdo_page() calls for read */ u64 read_count; /* number of get_vdo_page() calls for write */ u64 write_count; /* number of times pages failed to read */ u64 failed_reads; /* number of times pages failed to write */ u64 failed_writes; /* number of gets that are reclaimed */ u64 reclaimed; /* number of gets for outgoing pages */ u64 read_outgoing; /* number of gets that were already there */ u64 found_in_cache; /* number of gets requiring discard */ u64 discard_required; /* number of gets enqueued for their page */ u64 wait_for_page; /* number of gets that have to fetch */ u64 fetch_required; /* number of page fetches */ u64 pages_loaded; /* number of page saves */ u64 pages_saved; /* the number of flushes issued */ u64 flush_count; }; /** The dedupe statistics from hash locks */ struct hash_lock_statistics { /* Number of times the UDS advice proved correct */ u64 dedupe_advice_valid; /* Number of times the UDS advice proved incorrect */ u64 dedupe_advice_stale; /* Number of writes with the same data as another in-flight write */ u64 concurrent_data_matches; /* Number of writes whose hash collided with an in-flight write */ u64 concurrent_hash_collisions; /* Current number of dedupe queries that are in flight */ u32 curr_dedupe_queries; }; /** Counts of error conditions in VDO. */ struct error_statistics { /* number of times VDO got an invalid dedupe advice PBN from UDS */ u64 invalid_advice_pbn_count; /* number of times a VIO completed with a VDO_NO_SPACE error */ u64 no_space_error_count; /* number of times a VIO completed with a VDO_READ_ONLY error */ u64 read_only_error_count; }; struct bio_stats { /* Number of REQ_OP_READ bios */ u64 read; /* Number of REQ_OP_WRITE bios with data */ u64 write; /* Number of bios tagged with REQ_PREFLUSH and containing no data */ u64 empty_flush; /* Number of REQ_OP_DISCARD bios */ u64 discard; /* Number of bios tagged with REQ_PREFLUSH */ u64 flush; /* Number of bios tagged with REQ_FUA */ u64 fua; }; struct memory_usage { /* Tracked bytes currently allocated. */ u64 bytes_used; /* Maximum tracked bytes allocated. */ u64 peak_bytes_used; }; /** UDS index statistics */ struct index_statistics { /* Number of records stored in the index */ u64 entries_indexed; /* Number of post calls that found an existing entry */ u64 posts_found; /* Number of post calls that added a new entry */ u64 posts_not_found; /* Number of query calls that found an existing entry */ u64 queries_found; /* Number of query calls that added a new entry */ u64 queries_not_found; /* Number of update calls that found an existing entry */ u64 updates_found; /* Number of update calls that added a new entry */ u64 updates_not_found; /* Number of entries discarded */ u64 entries_discarded; }; /** The statistics of the vdo service. */ struct vdo_statistics { u32 version; /* Number of blocks used for data */ u64 data_blocks_used; /* Number of blocks used for VDO metadata */ u64 overhead_blocks_used; /* Number of logical blocks that are currently mapped to physical blocks */ u64 logical_blocks_used; /* number of physical blocks */ block_count_t physical_blocks; /* number of logical blocks */ block_count_t logical_blocks; /* Size of the block map page cache, in bytes */ u64 block_map_cache_size; /* The physical block size */ u64 block_size; /* Number of times the VDO has successfully recovered */ u64 complete_recoveries; /* Number of times the VDO has recovered from read-only mode */ u64 read_only_recoveries; /* String describing the operating mode of the VDO */ char mode[15]; /* Whether the VDO is in recovery mode */ bool in_recovery_mode; /* What percentage of recovery mode work has been completed */ u8 recovery_percentage; /* The statistics for the compressed block packer */ struct packer_statistics packer; /* Counters for events in the block allocator */ struct block_allocator_statistics allocator; /* Counters for events in the recovery journal */ struct recovery_journal_statistics journal; /* The statistics for the slab journals */ struct slab_journal_statistics slab_journal; /* The statistics for the slab summary */ struct slab_summary_statistics slab_summary; /* The statistics for the reference counts */ struct ref_counts_statistics ref_counts; /* The statistics for the block map */ struct block_map_statistics block_map; /* The dedupe statistics from hash locks */ struct hash_lock_statistics hash_lock; /* Counts of error conditions */ struct error_statistics errors; /* The VDO instance */ u32 instance; /* Current number of active VIOs */ u32 current_vios_in_progress; /* Maximum number of active VIOs */ u32 max_vios; /* Number of times the UDS index was too slow in responding */ u64 dedupe_advice_timeouts; /* Number of flush requests submitted to the storage device */ u64 flush_out; /* Logical block size */ u64 logical_block_size; /* Bios submitted into VDO from above */ struct bio_stats bios_in; struct bio_stats bios_in_partial; /* Bios submitted onward for user data */ struct bio_stats bios_out; /* Bios submitted onward for metadata */ struct bio_stats bios_meta; struct bio_stats bios_journal; struct bio_stats bios_page_cache; struct bio_stats bios_out_completed; struct bio_stats bios_meta_completed; struct bio_stats bios_journal_completed; struct bio_stats bios_page_cache_completed; struct bio_stats bios_acknowledged; struct bio_stats bios_acknowledged_partial; /* Current number of bios in progress */ struct bio_stats bios_in_progress; /* Memory usage stats. */ struct memory_usage memory_usage; /* The statistics for the UDS index */ struct index_statistics index; }; #endif /* not STATISTICS_H */
