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blkio: Increment the blkio cgroup stats for real now

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We also add start_time_ns and io_start_time_ns fields to struct request
here to record the time when a request is created and when it is
dispatched to device. We use ns uints here as ms and jiffies are
not very useful for non-rotational media.

Signed-off-by: Divyesh Shah<[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Divyesh Shah 2010-04-01 15:01:41 -07:00 • committed by Jens Axboe
commit 9195291e5f
5 changed files with 95 additions and 9 deletions
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14
block/blk-cgroup.h
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@ -112,12 +112,12 @@ static inline char *blkg_path(struct blkio_group *blkg)
{
return blkg->path;
}
void blkiocg_update_blkio_group_dequeue_stats(struct blkio_group *blkg,
void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
unsigned long dequeue);
#else
static inline char *blkg_path(struct blkio_group *blkg) { return NULL; }
static inline void blkiocg_update_blkio_group_dequeue_stats(
struct blkio_group *blkg, unsigned long dequeue) {}
static inline void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
unsigned long dequeue) {}
#endif
#if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE)
@ -130,6 +130,10 @@ extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg,
void *key);
void blkiocg_update_timeslice_used(struct blkio_group *blkg,
unsigned long time);
void blkiocg_update_request_dispatch_stats(struct blkio_group *blkg,
struct request *rq);
void blkiocg_update_request_completion_stats(struct blkio_group *blkg,
struct request *rq);
#else
struct cgroup;
static inline struct blkio_cgroup *
@ -147,5 +151,9 @@ static inline struct blkio_group *
blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key) { return NULL; }
static inline void blkiocg_update_timeslice_used(struct blkio_group *blkg,
unsigned long time) {}
static inline void blkiocg_update_request_dispatch_stats(
struct blkio_group *blkg, struct request *rq) {}
static inline void blkiocg_update_request_completion_stats(
struct blkio_group *blkg, struct request *rq) {}
#endif
#endif /* _BLK_CGROUP_H */