cfq-iosched: Print per slice sectors dispatched in blktrace
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From: Divyesh Shah on 19 Jul 2010 18:20 Looks good to me. Reviewed-by: Divyesh Shah <dpshah(a)google.com> On Mon, Jul 19, 2010 at 10:20 AM, Vivek Goyal <vgoyal(a)redhat.com> wrote: > - Divyesh had gotten rid of this code in the past. I want to re-introduce it > �back as it helps me a lot during debugging. > > Signed-off-by: Vivek Goyal <vgoyal(a)redhat.com> > --- > �block/cfq-iosched.c | � �8 ++++++-- > �1 files changed, 6 insertions(+), 2 deletions(-) > > diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c > index b23d7f4..1f0d4ea 100644 > --- a/block/cfq-iosched.c > +++ b/block/cfq-iosched.c > @@ -148,6 +148,8 @@ struct cfq_queue { > � � � �struct cfq_queue *new_cfqq; > � � � �struct cfq_group *cfqg; > � � � �struct cfq_group *orig_cfqg; > + � � � /* Number of sectors dispatched from queue in single dispatch round */ > + � � � unsigned long nr_sectors; > �}; > > �/* > @@ -926,8 +928,8 @@ static inline unsigned int cfq_cfqq_slice_usage(struct cfq_queue *cfqq) > � � � � � � � � � � � �slice_used = cfqq->allocated_slice; > � � � �} > > - � � � cfq_log_cfqq(cfqq->cfqd, cfqq, "sl_used=%u, sl_disp=%u", slice_used, > - � � � � � � � � � � � cfqq->slice_dispatch); > + � � � cfq_log_cfqq(cfqq->cfqd, cfqq, "sl_used=%u, disp=%u sect=%u", > + � � � � � � � � � � � slice_used, cfqq->slice_dispatch, cfqq->nr_sectors); > � � � �return slice_used; > �} > > @@ -1608,6 +1610,7 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd, > � � � � � � � �cfqq->allocated_slice = 0; > � � � � � � � �cfqq->slice_end = 0; > � � � � � � � �cfqq->slice_dispatch = 0; > + � � � � � � � cfqq->nr_sectors = 0; > > � � � � � � � �cfq_clear_cfqq_wait_request(cfqq); > � � � � � � � �cfq_clear_cfqq_must_dispatch(cfqq); > @@ -1970,6 +1973,7 @@ static void cfq_dispatch_insert(struct request_queue *q, struct request *rq) > � � � �elv_dispatch_sort(q, rq); > > � � � �cfqd->rq_in_flight[cfq_cfqq_sync(cfqq)]++; > + � � � cfqq->nr_sectors += blk_rq_sectors(rq); > � � � �cfq_blkiocg_update_dispatch_stats(&cfqq->cfqg->blkg, blk_rq_bytes(rq), > � � � � � � � � � � � � � � � � � � � �rq_data_dir(rq), rq_is_sync(rq)); > �} > -- > 1.7.1.1 > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |