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authorDivyesh Shah <dpshah@google.com>2010-04-08 21:15:10 -0700
committerJens Axboe <jens.axboe@oracle.com>2010-04-09 08:36:08 +0200
commitcdc1184cf4a7bd99f5473a91244197accc49146b (patch)
treeecd572867bfa5a82fa4ed16d7303448c7ea7d24c /drivers/scsi/libfc/fc_elsct.c
parent812d402648f4fc1ab1091b2172a46fc1b367c724 (diff)
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blkio: Add io_queued and avg_queue_size stats
These stats are useful for getting a feel for the queue depth of the cgroup, i.e., how filled up its queues are at a given instant and over the existence of the cgroup. This ability is useful when debugging problems in the wild as it helps understand the application's IO pattern w/o having to read through the userspace code (coz its tedious or just not available) or w/o the ability to run blktrace (since you may not have root access and/or not want to disturb performance). Signed-off-by: Divyesh Shah<dpshah@google.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/scsi/libfc/fc_elsct.c')
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