Re: high load, no bottleneck

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Wed, Sep 18, 2013 at 06:03:11PM +0200, Emmanuel Dreyfus wrote:
> Emmanuel Dreyfus <manu%netbsd.org@localhost> wrote:
> 
> > Thank you for saving my day. But now what happens?
> > I note the SATA disks are in IDE emulation mode, and not AHCI. This is
> > something I need to try changing:
> 
> Switched to AHCI. Here is below how hard disks are discovered (the relevant 
> raid
> is RAID1 on wd0 and wd1)

The other thing is, *if* we had support for more modern features (tagged
queueing, FUA, etc.) in our ATA code, switching to AHCI mode could potentially
have much more benefit.  But it doesn't now -- and the development work
required to add support for those features to the ATA code and to use them
in FFS and WAPBL is not small.

Thor