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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 11:19:16 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-07-24 09:53:24 +0000 |
commit | b5f8ee61a7f7e9bd291dd26b0585d03eb686c941 (patch) | |
tree | d4d31289c39fc00da064a825df13a0b98ce95b10 /src/database/engine/cache.h | |
parent | Adding upstream version 1.44.3. (diff) | |
download | netdata-upstream.tar.xz netdata-upstream.zip |
Adding upstream version 1.46.3.upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/database/engine/cache.h')
-rw-r--r-- | src/database/engine/cache.h | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/src/database/engine/cache.h b/src/database/engine/cache.h new file mode 100644 index 000000000..b6f81bcc2 --- /dev/null +++ b/src/database/engine/cache.h @@ -0,0 +1,251 @@ +// SPDX-License-Identifier: GPL-3.0-or-later +#ifndef DBENGINE_CACHE_H +#define DBENGINE_CACHE_H + +#include "datafile.h" +#include "../rrd.h" + +// CACHE COMPILE TIME CONFIGURATION +// #define PGC_COUNT_POINTS_COLLECTED 1 + +typedef struct pgc PGC; +typedef struct pgc_page PGC_PAGE; +#define PGC_NAME_MAX 23 + +typedef enum __attribute__ ((__packed__)) { + PGC_OPTIONS_NONE = 0, + PGC_OPTIONS_EVICT_PAGES_INLINE = (1 << 0), + PGC_OPTIONS_FLUSH_PAGES_INLINE = (1 << 1), + PGC_OPTIONS_AUTOSCALE = (1 << 2), +} PGC_OPTIONS; + +#define PGC_OPTIONS_DEFAULT (PGC_OPTIONS_EVICT_PAGES_INLINE | PGC_OPTIONS_FLUSH_PAGES_INLINE | PGC_OPTIONS_AUTOSCALE) + +typedef struct pgc_entry { + Word_t section; // the section this belongs to + Word_t metric_id; // the metric this belongs to + time_t start_time_s; // the start time of the page + time_t end_time_s; // the end time of the page + size_t size; // the size in bytes of the allocation, outside the cache + void *data; // a pointer to data outside the cache + uint32_t update_every_s; // the update every of the page + bool hot; // true if this entry is currently being collected + uint8_t *custom_data; +} PGC_ENTRY; + +#define PGC_CACHE_LINE_PADDING(x) uint8_t padding##x[64] + +struct pgc_queue_statistics { + size_t entries; + size_t size; + + PGC_CACHE_LINE_PADDING(1); + + size_t max_entries; + size_t max_size; + + PGC_CACHE_LINE_PADDING(2); + + size_t added_entries; + size_t added_size; + + PGC_CACHE_LINE_PADDING(3); + + size_t removed_entries; + size_t removed_size; + + PGC_CACHE_LINE_PADDING(4); +}; + +struct pgc_statistics { + size_t wanted_cache_size; + size_t current_cache_size; + + PGC_CACHE_LINE_PADDING(1); + + size_t added_entries; + size_t added_size; + + PGC_CACHE_LINE_PADDING(2); + + size_t removed_entries; + size_t removed_size; + + PGC_CACHE_LINE_PADDING(3); + + size_t entries; // all the entries (includes clean, dirty, hot) + size_t size; // all the entries (includes clean, dirty, hot) + + size_t evicting_entries; + size_t evicting_size; + + size_t flushing_entries; + size_t flushing_size; + + size_t hot2dirty_entries; + size_t hot2dirty_size; + + PGC_CACHE_LINE_PADDING(4); + + size_t acquires; + PGC_CACHE_LINE_PADDING(4a); + size_t releases; + PGC_CACHE_LINE_PADDING(4b); + size_t acquires_for_deletion; + PGC_CACHE_LINE_PADDING(4c); + + size_t referenced_entries; // all the entries currently referenced + size_t referenced_size; // all the entries currently referenced + + PGC_CACHE_LINE_PADDING(5); + + size_t searches_exact; + size_t searches_exact_hits; + size_t searches_exact_misses; + + PGC_CACHE_LINE_PADDING(6); + + size_t searches_closest; + size_t searches_closest_hits; + size_t searches_closest_misses; + + PGC_CACHE_LINE_PADDING(7); + + size_t flushes_completed; + size_t flushes_completed_size; + size_t flushes_cancelled; + size_t flushes_cancelled_size; + +#ifdef PGC_COUNT_POINTS_COLLECTED + PGC_CACHE_LINE_PADDING(8); + size_t points_collected; +#endif + + PGC_CACHE_LINE_PADDING(9); + + size_t insert_spins; + size_t evict_spins; + size_t release_spins; + size_t acquire_spins; + size_t delete_spins; + size_t flush_spins; + + PGC_CACHE_LINE_PADDING(10); + + size_t workers_search; + size_t workers_add; + size_t workers_evict; + size_t workers_flush; + size_t workers_jv2_flush; + size_t workers_hot2dirty; + + size_t evict_skipped; + size_t hot_empty_pages_evicted_immediately; + size_t hot_empty_pages_evicted_later; + + PGC_CACHE_LINE_PADDING(11); + + // events + size_t events_cache_under_severe_pressure; + size_t events_cache_needs_space_aggressively; + size_t events_flush_critical; + + PGC_CACHE_LINE_PADDING(12); + + struct { + PGC_CACHE_LINE_PADDING(0); + struct pgc_queue_statistics hot; + PGC_CACHE_LINE_PADDING(1); + struct pgc_queue_statistics dirty; + PGC_CACHE_LINE_PADDING(2); + struct pgc_queue_statistics clean; + PGC_CACHE_LINE_PADDING(3); + } queues; +}; + + +typedef void (*free_clean_page_callback)(PGC *cache, PGC_ENTRY entry); +typedef void (*save_dirty_page_callback)(PGC *cache, PGC_ENTRY *entries_array, PGC_PAGE **pages_array, size_t entries); +typedef void (*save_dirty_init_callback)(PGC *cache, Word_t section); +// create a cache +PGC *pgc_create(const char *name, + size_t clean_size_bytes, free_clean_page_callback pgc_free_clean_cb, + size_t max_dirty_pages_per_flush, save_dirty_init_callback pgc_save_init_cb, save_dirty_page_callback pgc_save_dirty_cb, + size_t max_pages_per_inline_eviction, size_t max_inline_evictors, + size_t max_skip_pages_per_inline_eviction, + size_t max_flushes_inline, + PGC_OPTIONS options, size_t partitions, size_t additional_bytes_per_page); + +// destroy the cache +void pgc_destroy(PGC *cache); + +#define PGC_SECTION_ALL ((Word_t)0) +void pgc_flush_all_hot_and_dirty_pages(PGC *cache, Word_t section); + +// add a page to the cache and return a pointer to it +PGC_PAGE *pgc_page_add_and_acquire(PGC *cache, PGC_ENTRY entry, bool *added); + +// get another reference counter on an already referenced page +PGC_PAGE *pgc_page_dup(PGC *cache, PGC_PAGE *page); + +// release a page (all pointers to it are now invalid) +void pgc_page_release(PGC *cache, PGC_PAGE *page); + +// mark a hot page dirty, and release it +void pgc_page_hot_to_dirty_and_release(PGC *cache, PGC_PAGE *page, bool never_flush); + +// find a page from the cache +typedef enum { + PGC_SEARCH_EXACT, + PGC_SEARCH_CLOSEST, + PGC_SEARCH_FIRST, + PGC_SEARCH_NEXT, + PGC_SEARCH_LAST, + PGC_SEARCH_PREV, +} PGC_SEARCH; + +PGC_PAGE *pgc_page_get_and_acquire(PGC *cache, Word_t section, Word_t metric_id, time_t start_time_s, PGC_SEARCH method); + +// get information from an acquired page +Word_t pgc_page_section(PGC_PAGE *page); +Word_t pgc_page_metric(PGC_PAGE *page); +time_t pgc_page_start_time_s(PGC_PAGE *page); +time_t pgc_page_end_time_s(PGC_PAGE *page); +uint32_t pgc_page_update_every_s(PGC_PAGE *page); +uint32_t pgc_page_fix_update_every(PGC_PAGE *page, uint32_t update_every_s); +time_t pgc_page_fix_end_time_s(PGC_PAGE *page, time_t end_time_s); +void *pgc_page_data(PGC_PAGE *page); +void *pgc_page_custom_data(PGC *cache, PGC_PAGE *page); +size_t pgc_page_data_size(PGC *cache, PGC_PAGE *page); +bool pgc_is_page_hot(PGC_PAGE *page); +bool pgc_is_page_dirty(PGC_PAGE *page); +bool pgc_is_page_clean(PGC_PAGE *page); +void pgc_reset_hot_max(PGC *cache); +size_t pgc_get_current_cache_size(PGC *cache); +size_t pgc_get_wanted_cache_size(PGC *cache); + +// resetting the end time of a hot page +void pgc_page_hot_set_end_time_s(PGC *cache, PGC_PAGE *page, time_t end_time_s); +bool pgc_page_to_clean_evict_or_release(PGC *cache, PGC_PAGE *page); + +typedef void (*migrate_to_v2_callback)(Word_t section, unsigned datafile_fileno, uint8_t type, Pvoid_t JudyL_metrics, Pvoid_t JudyL_extents_pos, size_t count_of_unique_extents, size_t count_of_unique_metrics, size_t count_of_unique_pages, void *data); +void pgc_open_cache_to_journal_v2(PGC *cache, Word_t section, unsigned datafile_fileno, uint8_t type, migrate_to_v2_callback cb, void *data); +void pgc_open_evict_clean_pages_of_datafile(PGC *cache, struct rrdengine_datafile *datafile); +size_t pgc_count_clean_pages_having_data_ptr(PGC *cache, Word_t section, void *ptr); +size_t pgc_count_hot_pages_having_data_ptr(PGC *cache, Word_t section, void *ptr); + +typedef size_t (*dynamic_target_cache_size_callback)(void); +void pgc_set_dynamic_target_cache_size_callback(PGC *cache, dynamic_target_cache_size_callback callback); + +// return true when there is more work to do +bool pgc_evict_pages(PGC *cache, size_t max_skip, size_t max_evict); +bool pgc_flush_pages(PGC *cache, size_t max_flushes); + +struct pgc_statistics pgc_get_statistics(PGC *cache); +size_t pgc_hot_and_dirty_entries(PGC *cache); + +struct aral_statistics *pgc_aral_statistics(void); +size_t pgc_aral_structures(void); +size_t pgc_aral_overhead(void); + +#endif // DBENGINE_CACHE_H |