43 строки
1.1 KiB
C
43 строки
1.1 KiB
C
|
#ifndef BLK_STAT_H
|
||
|
|
#define BLK_STAT_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ~0.13s window as a power-of-2 (2^27 nsecs)
|
||
|
|
*/
|
||
|
|
#define BLK_STAT_NSEC 134217728ULL
|
||
|
|
#define BLK_STAT_NSEC_MASK ~(BLK_STAT_NSEC - 1)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Upper 3 bits can be used elsewhere
|
||
|
|
*/
|
||
|
|
#define BLK_STAT_RES_BITS 3
|
||
|
|
#define BLK_STAT_SHIFT (64 - BLK_STAT_RES_BITS)
|
||
|
|
#define BLK_STAT_TIME_MASK ((1ULL << BLK_STAT_SHIFT) - 1)
|
||
|
|
#define BLK_STAT_MASK ~BLK_STAT_TIME_MASK
|
||
|
|
|
||
|
|
enum {
|
||
|
|
BLK_STAT_READ = 0,
|
||
|
|
BLK_STAT_WRITE,
|
||
|
|
};
|
||
|
|
|
||
|
|
void blk_stat_add(struct blk_rq_stat *, struct request *);
|
||
|
|
void blk_hctx_stat_get(struct blk_mq_hw_ctx *, struct blk_rq_stat *);
|
||
|
|
void blk_queue_stat_get(struct request_queue *, struct blk_rq_stat *);
|
||
|
|
void blk_stat_clear(struct request_queue *);
|
||
|
|
void blk_stat_init(struct blk_rq_stat *);
|
||
|
|
bool blk_stat_is_current(struct blk_rq_stat *);
|
||
|
|
void blk_stat_set_issue_time(struct blk_issue_stat *);
|
||
|
|
bool blk_stat_enable(struct request_queue *);
|
||
|
|
|
||
|
|
static inline u64 __blk_stat_time(u64 time)
|
||
|
|
{
|
||
|
|
return time & BLK_STAT_TIME_MASK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline u64 blk_stat_time(struct blk_issue_stat *stat)
|
||
|
|
{
|
||
|
|
return __blk_stat_time(stat->time);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|