drivers/md/bcache/stats.h

   1 #ifndef _BCACHE_STATS_H_
   2 #define _BCACHE_STATS_H_
   3
   4 struct cache_stat_collector {
   5         atomic_t cache_hits;
   6         atomic_t cache_misses;
   7         atomic_t cache_bypass_hits;
   8         atomic_t cache_bypass_misses;
   9         atomic_t cache_readaheads;
  10         atomic_t cache_miss_collisions;
  11         atomic_t sectors_bypassed;
  12 };
  13
  14 struct cache_stats {
  15         struct kobject          kobj;
  16
  17         unsigned long cache_hits;
  18         unsigned long cache_misses;
  19         unsigned long cache_bypass_hits;
  20         unsigned long cache_bypass_misses;
  21         unsigned long cache_readaheads;
  22         unsigned long cache_miss_collisions;
  23         unsigned long sectors_bypassed;
  24
  25         unsigned                rescale;
  26 };
  27
  28 struct cache_accounting {
  29         struct closure          cl;
  30         struct timer_list       timer;
  31         atomic_t                closing;
  32
  33         struct cache_stat_collector collector;
  34
  35         struct cache_stats total;
  36         struct cache_stats five_minute;
  37         struct cache_stats hour;
  38         struct cache_stats day;
  39 };
  40
  41 struct search;
  42
  43 void bch_cache_accounting_init(struct cache_accounting *acc,
  44                                struct closure *parent);
  45
  46 int bch_cache_accounting_add_kobjs(struct cache_accounting *acc,
  47                                    struct kobject *parent);
  48
  49 void bch_cache_accounting_clear(struct cache_accounting *acc);
  50
  51 void bch_cache_accounting_destroy(struct cache_accounting *acc);
  52
  53 void bch_mark_cache_accounting(struct search *s, bool hit, bool bypass);
  54 void bch_mark_cache_readahead(struct search *s);
  55 void bch_mark_cache_miss_collision(struct search *s);
  56 void bch_mark_sectors_bypassed(struct search *s, int sectors);
  57
  58 #endif /* _BCACHE_STATS_H_ */