diff options
author | Kent Overstreet <koverstreet@google.com> | 2013-03-23 16:11:31 -0700 |
---|---|---|
committer | Kent Overstreet <koverstreet@google.com> | 2013-03-23 16:11:31 -0700 |
commit | cafe563591446cf80bfbc2fe3bc72a2e36cf1060 (patch) | |
tree | c8ae27b13dcdb0219634376ca5e667df32b1173a /drivers/md/bcache/stats.h | |
parent | ea6749c705d9e629ed03c7336cc929fc6014b834 (diff) | |
download | linux-stable-cafe563591446cf80bfbc2fe3bc72a2e36cf1060.tar.gz linux-stable-cafe563591446cf80bfbc2fe3bc72a2e36cf1060.tar.bz2 linux-stable-cafe563591446cf80bfbc2fe3bc72a2e36cf1060.zip |
bcache: A block layer cache
Does writethrough and writeback caching, handles unclean shutdown, and
has a bunch of other nifty features motivated by real world usage.
See the wiki at http://bcache.evilpiepirate.org for more.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Diffstat (limited to 'drivers/md/bcache/stats.h')
-rw-r--r-- | drivers/md/bcache/stats.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/md/bcache/stats.h b/drivers/md/bcache/stats.h new file mode 100644 index 000000000000..c7c7a8fd29fe --- /dev/null +++ b/drivers/md/bcache/stats.h @@ -0,0 +1,58 @@ +#ifndef _BCACHE_STATS_H_ +#define _BCACHE_STATS_H_ + +struct cache_stat_collector { + atomic_t cache_hits; + atomic_t cache_misses; + atomic_t cache_bypass_hits; + atomic_t cache_bypass_misses; + atomic_t cache_readaheads; + atomic_t cache_miss_collisions; + atomic_t sectors_bypassed; +}; + +struct cache_stats { + struct kobject kobj; + + unsigned long cache_hits; + unsigned long cache_misses; + unsigned long cache_bypass_hits; + unsigned long cache_bypass_misses; + unsigned long cache_readaheads; + unsigned long cache_miss_collisions; + unsigned long sectors_bypassed; + + unsigned rescale; +}; + +struct cache_accounting { + struct closure cl; + struct timer_list timer; + atomic_t closing; + + struct cache_stat_collector collector; + + struct cache_stats total; + struct cache_stats five_minute; + struct cache_stats hour; + struct cache_stats day; +}; + +struct search; + +void bch_cache_accounting_init(struct cache_accounting *acc, + struct closure *parent); + +int bch_cache_accounting_add_kobjs(struct cache_accounting *acc, + struct kobject *parent); + +void bch_cache_accounting_clear(struct cache_accounting *acc); + +void bch_cache_accounting_destroy(struct cache_accounting *acc); + +void bch_mark_cache_accounting(struct search *s, bool hit, bool bypass); +void bch_mark_cache_readahead(struct search *s); +void bch_mark_cache_miss_collision(struct search *s); +void bch_mark_sectors_bypassed(struct search *s, int sectors); + +#endif /* _BCACHE_STATS_H_ */ |