On Sun, May 29 2005, Michael Thonke wrote:
> >Nothing, unfortunately NCQ doesn't provided any way of doing ordered
> >tags. The only tunable is the queue_depth, you can set that anywhere
> >between 1 and 30.
> >
> >
> >
> So way my drive got default 30 as queue_depth on AHCI as you mentoined
> in the next mail
> 2-4 should be suitable and enough/normal?
Yes, 30 will be default for basically anyone as ahci now advertises a
max depth of 30 and the drives typically all support a depth of 32. The
minimum value of those two is used.
Whether 2-4 is 'enough' depends on your workload. But usually 2-4 is
enough to get a nice speedup on heavier io, while still getting you good
latencies on the individual io.
--
Jens Axboe
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]