Re: Performance regression in IO scheduler still there

Jens Axboe
2009-11-13T07:45:17Z

On Thu, Nov 12 2009, Jeff Moyer wrote:
> Jens Axboe <jens.axboe@oracle.com> writes:
>
> > On Thu, Nov 12 2009, Jeff Moyer wrote:
> >> Good question. ;-) I grep for NCQ in dmesg output and make sure it's
> >> greater than 0/32. There may be a better way, though.
> >
> > cat /sys/block/<dev>/device/queue_depth
> >
> > :-)
>
> OK, your comment about only working for SCSI disks threw me off.
> Perhaps you meant only works for devices that use the sd driver?

Yeah, only works for storage that plugs into the SCSI stack.

--
Jens Axboe