mfi(4) IO performance regression, post 8.1

[Steve McCoy]

On 7/19/12 10:12 AM, Eric van Gyzen wrote:
>
> You might simply try a different idle function.  See these sysctls:
>
> machdep.idle: acpi
> machdep.idle_available: spin, mwait, mwait_hlt, hlt, acpi,
>
> Eric

I've tried your suggestion (with mwait) and the problem went away. Thanks a lot!
This seems like a good workaround, but I am worried about whether it could
negatively affect something that I don't know about which also depends on this sysctl.
If you have any ideas on other areas I could test, I'd greatly appreciate the info.

Thanks again!