/* 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 */
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