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Diffstat (limited to 'drivers/md/dm-vdo/statistics.h')
| -rw-r--r-- | drivers/md/dm-vdo/statistics.h | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/drivers/md/dm-vdo/statistics.h b/drivers/md/dm-vdo/statistics.h new file mode 100644 index 000000000..c88a75dff --- /dev/null +++ b/drivers/md/dm-vdo/statistics.h @@ -0,0 +1,278 @@ +/* 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 */ |