SuperMicro i7 (UP) - very slow performance

Bryce Edwards bryce at
Sat Sep 18 13:58:23 UTC 2010

I have a Supermicro with the C7X58 motherboard and an i7 930 cpu, and
it is nowhere near the performance it should be.  A buildworld just
took 22.5 hours!

bryce at tahiti[~]>uname -a
FreeBSD 8.1-STABLE FreeBSD 8.1-STABLE #0: Tue Sep  7
22:45:38 CDT 2010
root at  amd64

I have disabled "Legacy USB Support" in the BIOS and that helped, but
I'm not finding any other setting that are getting things where they
need to be.

I have tested the two system drives independently (currently a zfs
mirror), so it is not likely to be an hdd issue.

Here's the verbose dmesg boot details -

And, the IPMI ASL in case that is of any value -

Currently, I'm not running powerd, performance is not better with it running.

root at tahiti[/usr/src]#cat /boot/loader.conf



# async i/o

# VirtualBox


# Power Saving

# Disable APIC subsystem - no longer needed when disabling lapic below

# Disable local APIC (LAPIC) timer - for C3 state

# Avoid 128 interrupts/sec per core, at cost of scheduling precision

# Disable throttle control (and rely on EIST)

Thanks in advance for your time!


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