[PATCH 3/3] cfq-iosched: Print per slice sectors dispatched in blktrace
in [Kernel]
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From: Vivek Goyal on 19 Jul 2010 13:30 - 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/
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