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Enhanced partition statistics: update partition statitics

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Updates the enhanced partition statistics in generic block layer
besides the disk statistics.

Signed-off-by: Jerome Marchand <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jerome Marchand 2008-02-08 11:04:35 +01:00 • committed by Jens Axboe
commit 6f2576af5b
4 changed files with 44 additions and 4 deletions
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34
block/blk-core.c
View file

@ -60,10 +60,15 @@ static void drive_stat_acct(struct request *rq, int new_io)
return;
if (!new_io) {
__disk_stat_inc(rq->rq_disk, merges[rw]);
__all_stat_inc(rq->rq_disk, merges[rw], rq->sector);
} else {
struct hd_struct *part = get_part(rq->rq_disk, rq->sector);
disk_round_stats(rq->rq_disk);
rq->rq_disk->in_flight++;
if (part) {
part_round_stats(part);
part->in_flight++;
}
}
}
@ -997,6 +1002,21 @@ void disk_round_stats(struct gendisk *disk)
}
EXPORT_SYMBOL_GPL(disk_round_stats);
void part_round_stats(struct hd_struct *part)
{
unsigned long now = jiffies;
if (now == part->stamp)
return;
if (part->in_flight) {
__part_stat_add(part, time_in_queue,
part->in_flight * (now - part->stamp));
__part_stat_add(part, io_ticks, (now - part->stamp));
}
part->stamp = now;
}
/*
* queue lock must be held
*/
@ -1530,7 +1550,8 @@ static int __end_that_request_first(struct request *req, int error,
if (blk_fs_request(req) && req->rq_disk) {
const int rw = rq_data_dir(req);
disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9);
all_stat_add(req->rq_disk, sectors[rw],
nr_bytes >> 9, req->sector);
}
total_bytes = bio_nbytes = 0;
@ -1715,11 +1736,16 @@ static void end_that_request_last(struct request *req, int error)
if (disk && blk_fs_request(req) && req != &req->q->bar_rq) {
unsigned long duration = jiffies - req->start_time;
const int rw = rq_data_dir(req);
struct hd_struct *part = get_part(disk, req->sector);
__disk_stat_inc(disk, ios[rw]);
__disk_stat_add(disk, ticks[rw], duration);
__all_stat_inc(disk, ios[rw], req->sector);
__all_stat_add(disk, ticks[rw], duration, req->sector);
disk_round_stats(disk);
disk->in_flight--;
if (part) {
part_round_stats(part);
part->in_flight--;
}
}
if (req->end_io)

6
block/blk-merge.c
View file

@ -454,8 +454,14 @@ static int attempt_merge(struct request_queue *q, struct request *req,
elv_merge_requests(q, req, next);
if (req->rq_disk) {
struct hd_struct *part
= get_part(req->rq_disk, req->sector);
disk_round_stats(req->rq_disk);
req->rq_disk->in_flight--;
if (part) {
part_round_stats(part);
part->in_flight--;
}
}
req->ioprio = ioprio_best(req->ioprio, next->ioprio);