diff options
| author | Jens Axboe <axboe@suse.de> | 2006-06-16 11:23:00 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@nelson.home.kernel.dk> | 2006-06-23 17:10:39 +0200 |
| commit | caaa5f9f0a75d1dc5e812e69afdbb8720e077fd3 (patch) | |
| tree | 07aba6bac5a57cb3efd23762acfd719e255775ab /drivers/scsi/tmscsim.h | |
| parent | 35e6077cb16f93517ba5a51ba849b186d2474d60 (diff) | |
[PATCH] cfq-iosched: many performance fixes
This is a collection of patches that greatly improve CFQ performance
in some circumstances.
- Change the idling logic to only kick in after a request is done and we
are deciding what to do. Before the idling included the request service
time, so it was hard to adjust. Now it's true think/idle time.
- Take advantage of TCQ/NCQ/queueing for seeky sync workloads, but keep
it in control for sync and sequential (or close to) workloads.
- Expire queues immediately and move on to other busy queues, if we are
not going to idle after the current one finishes.
- Don't rearm idle timer if there are no busy queues. Just leave the
system idle.
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'drivers/scsi/tmscsim.h')
0 files changed, 0 insertions, 0 deletions