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From: Iasen Kostov <tbyte@otel.net>
To: FreeBSD Net <freebsd-net@freebsd.org>
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Date: Thu, 02 Mar 2006 16:24:55 +0200
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Subject: Re: SMP NAT
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On Thu, 2006-03-02 at 15:26 +0200, Iasen Kostov wrote:
> 	Hi,
> I'm now using a MP system (dual opteron) to do NAT for about 1500
> clients at once at speed above 200Mbit/sec full-duplex (e.g about
> 400Mbit/sec) and I'm using PF to do the NAT. Bad thing is that the
> second CPU is idle. As I can see from top - about 50% of the cpu is used
> by irq handler for the ethernet adapter (irq27: bge0 bge1 - I'm using
> only bge0 to route via VLANs) and about 30% by the network interrupt
> handler. I guess that the swi1:net is handling the NAT (via PF) and if
> swi1 and irq27 are in different handlers why they don't get executed on
> different CPUs (second CPU is 98% idle and top show that both handlers
> run on same CPU). Aren't both handlers in different kernel threads ?
> If they are not - is it possible to be in different threads on different
> CPUs ?
> 
> 
	It's 6.0-STABLE #0: Thu Dec  8 21:19:54 UTC 2005 on amd64. And no
polling is used.