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Date: Wed, 22 Mar 2006 13:14:48 -0800
From: Luigi Rizzo <rizzo@icir.org>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
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	from phk@phk.freebsd.dk on Wed, Mar 22, 2006 at 09:41:27PM +0100
Cc: current@freebsd.org
Subject: Re: interesting(?) data on network interrupt servicing
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On Wed, Mar 22, 2006 at 09:41:27PM +0100, Poul-Henning Kamp wrote:
> In message <20060322122906.A41691@xorpc.icir.org>, Luigi Rizzo writes:
> 
> >    if (thread)
> >	isrc->is_pic->pic_disable_source(isrc, PIC_EOI);
> >
> >I have no idea, though, why the other pic_disable_source()
> >is so expensive. The 4-5k TSC ticks are approx 3us
> >
> >Any clues ?
> 
> ISA bus access.

yeah but this is a modern laptop with an apic,
not an 8259... i don't think it has any ISA bus unless there is
some strange emulation going on ?

	cheers
	luigi