Subject: Re: painfully slow
To: Chris Jones <>
From: Stephen Degler <>
List: port-amd64
Date: 08/20/2007 22:39:06
Chris Jones wrote:
> I have a new Dell server with a dual-core Opteron, running 
> NetBSD/amd64 3.1. Originally, I was trying to get it to run 
> GENERIC.MP, but it would lock up solid under heavy disk load. Now I'm 
> running GENERIC, and it's horribly slow.
> Currently the machine is reconstructing parity on a RAID array while 
> it extracts syssrc.tgz. "systat vmstat" shows 92% time in interrupt, 
> with 33000 interrupts every sample period. 30000 of those are ioapic0 
> pin 11. The disk activity in systat vmstat shows 160 xfers and 2000K 
> bytes to each of wd0 and wd1. To me, the number of interrupts seems 
> excessive for that many transfers. :)
> My dmesg shows pin 11 being used for ohci0, which is the only way I 
> have to attach a keyboard to this thing. There is no PS/2 port. Any 
> advice on what I should do here? I'm guessing it has something to do 
> with USB.
> Chris
Did you disable USB legacy support in the bios?  This may help.