Re: High TLB shootdown I interrupts with wm gigabit NIC?

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

On Wed, Jul 30, 2008 at 06:42:30PM +0100, Mark Cullen wrote:
> (markie@homeserver:ttyp0)-(~)$ uname -a
> NetBSD homeserver.bone.servebeer.com 4.0_STABLE NetBSD 4.0_STABLE 
> (HOMESERVER.MP) #2: Sat Jul 12 14:54:54 BST 2008 
> markie%homeserver.bone.servebeer.com@localhost:/usr/obj/sys/arch/amd64/compile/HOMESERVER.MP
>  
> amd64

NetBSD 4.0's kernel doesn't have very scalable SMP support. The high
number of TLB shootdowns is probably a side effect of that.

The good news is that SMP scalability has been improved a lot in
NetBSD-current, mostly because of Andy Doran's work.

        Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/