Subject: Re: IFQ_MAXLEN: How large can it be?
To: None <tech-net@NetBSD.org>
From: Christoph Kaegi <kgc@zhwin.ch>
List: tech-net
Date: 11/16/2006 15:41:46
On 16.11-15:26, Manuel Bouyer wrote:
> On Thu, Nov 16, 2006 at 02:49:24PM +0100, Christoph Kaegi wrote:
> > [...]
> > I always wondered, if the system is able to handle the
> > 10'000 to 20'000 interrupts it sometimes gets.
> > (according to sysstat vm 1)
> 
> This shouldn't be an issue. I have less powerfull systems that gets that
> much interruts.
> 
> 
> > Sometimes it even gets more than that.
> > 
> > Can I somehow measure if interrupts get lost?
> 
> You can't really "loose" interrupts; the interrupt in keep pending until
> it's serviced. If another comes in while it's pending, the interrupt routine
> will just do all the work at once when it's called.
> 
> Did you enable ip4, tcp4 and udp4 checksums on your wm adapters ? This
> can help a lot.
> 

No I didn't. Can I do that online while the machine is running
without risking it going belly-up?

If not, I'll enable them tonight.


-- 
----------------------------------------------------------------------
Christoph Kaegi                                           kgc@zhwin.ch
----------------------------------------------------------------------