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block: Update to io-controller stats

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Changelog from v1:
o Call blkiocg_update_idle_time_stats() at cfq_rq_enqueued() instead of at
  dispatch time.

Changelog from original patchset: (in response to Vivek Goyal's comments)
o group blkiocg_update_blkio_group_dequeue_stats() with other DEBUG functions
o rename blkiocg_update_set_active_queue_stats() to
  blkiocg_update_avg_queue_size_stats()
o s/request/io/ in blkiocg_update_request_add_stats() and
  blkiocg_update_request_remove_stats()
o Call cfq_del_timer() at request dispatch() instead of
  blkiocg_update_idle_time_stats()

Signed-off-by: Divyesh Shah<[email protected]>
Acked-by: Vivek Goyal <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Divyesh Shah 2010-04-13 19:59:17 +02:00 • committed by Jens Axboe
commit a11cdaa7af
3 changed files with 28 additions and 32 deletions
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20
block/cfq-iosched.c
View file

@ -1381,10 +1381,10 @@ static void cfq_reposition_rq_rb(struct cfq_queue *cfqq, struct request *rq)
{
elv_rb_del(&cfqq->sort_list, rq);
cfqq->queued[rq_is_sync(rq)]--;
blkiocg_update_request_remove_stats(&cfqq->cfqg->blkg, rq_data_dir(rq),
blkiocg_update_io_remove_stats(&cfqq->cfqg->blkg, rq_data_dir(rq),
rq_is_sync(rq));
cfq_add_rq_rb(rq);
blkiocg_update_request_add_stats(
blkiocg_update_io_add_stats(
&cfqq->cfqg->blkg, &cfqq->cfqd->serving_group->blkg,
rq_data_dir(rq), rq_is_sync(rq));
}
@ -1442,7 +1442,7 @@ static void cfq_remove_request(struct request *rq)
cfq_del_rq_rb(rq);
cfqq->cfqd->rq_queued--;
blkiocg_update_request_remove_stats(&cfqq->cfqg->blkg, rq_data_dir(rq),
blkiocg_update_io_remove_stats(&cfqq->cfqg->blkg, rq_data_dir(rq),
rq_is_sync(rq));
if (rq_is_meta(rq)) {
WARN_ON(!cfqq->meta_pending);
@ -1541,7 +1541,7 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
if (cfqq) {
cfq_log_cfqq(cfqd, cfqq, "set_active wl_prio:%d wl_type:%d",
cfqd->serving_prio, cfqd->serving_type);
blkiocg_update_set_active_queue_stats(&cfqq->cfqg->blkg);
blkiocg_update_avg_queue_size_stats(&cfqq->cfqg->blkg);
cfqq->slice_start = 0;
cfqq->dispatch_start = jiffies;
cfqq->allocated_slice = 0;
@ -2395,11 +2395,6 @@ static int cfq_dispatch_requests(struct request_queue *q, int force)
}
cfq_log_cfqq(cfqd, cfqq, "dispatched a request");
/*
* This is needed since we don't exactly match the mod_timer() and
* del_timer() calls in CFQ.
*/
blkiocg_update_idle_time_stats(&cfqq->cfqg->blkg);
return 1;
}
@ -3208,8 +3203,11 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
cfq_del_timer(cfqd, cfqq);
cfq_clear_cfqq_wait_request(cfqq);
__blk_run_queue(cfqd->queue);
} else
} else {
blkiocg_update_idle_time_stats(
&cfqq->cfqg->blkg);
cfq_mark_cfqq_must_dispatch(cfqq);
}
}
} else if (cfq_should_preempt(cfqd, cfqq, rq)) {
/*
@ -3235,7 +3233,7 @@ static void cfq_insert_request(struct request_queue *q, struct request *rq)
list_add_tail(&rq->queuelist, &cfqq->fifo);
cfq_add_rq_rb(rq);
blkiocg_update_request_add_stats(&cfqq->cfqg->blkg,
blkiocg_update_io_add_stats(&cfqq->cfqg->blkg,
&cfqd->serving_group->blkg, rq_data_dir(rq),
rq_is_sync(rq));
cfq_rq_enqueued(cfqd, cfqq, rq);