Date: Fri, 7 Feb 2003 21:54:10 -0500 From: Hiten Pandya <hiten@unixdaemons.com> To: Andrey Simonenko <simon@comsys.ntu-kpi.kiev.ua> Cc: Julian Elischer <julian@elischer.org>, Dag-Erling Smorgrav <des@ofug.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: Help with understanding process state, context switching and Message-ID: <20030208025410.GA87030@unixdaemons.com> In-Reply-To: <20030207133515.GA2480@pm514-9.comsys.ntu-kpi.kiev.ua> References: <200302061850.KAA08537@InterJet.elischer.org> <20030207133515.GA2480@pm514-9.comsys.ntu-kpi.kiev.ua>
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On Fri, Feb 07, 2003 at 03:35:15PM +0200, Andrey Simonenko wrote the words in effect of:
> On Thu, Feb 06, 2003 at 10:50:28AM -0800, Julian Elischer wrote:
> In this case, as I understand, I need to modify some parts of the kernel.
> What is IP ?
I think Julian meant IPI (Inter-Processor Interrupt), basically, a way
of communicating with other CPUs in an x86 SMP system. They allow you
to 'interrupt any other processor or set of processors' [1] -- This
guide should give you a lot of valuable information regarding IPIs and
basic SMP stuff. More details on SMP can be found in [2] for x86s.
Cheers.
[1] - IA-32 Intel(R) Architecture Software Developer's Manual
Volume 3: System Programming Guide. Available from:
http://developer.intel.com/
[2] - Intel(R) MultiProcessor Specification. Available from:
http://developer.intel.com/
--
Hiten Pandya (hiten@unixdaemons.com, hiten@uk.FreeBSD.org)
http://www.unixdaemons.com/~hiten/
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