Re: Ask yourself these before you choosing a 32bit OS...

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Article #1777

#1777

From: Peter da Silva
Date: Mon, 28 Aug 1995 18:07

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In article <41itqp$4ij@usenet.ucs.indiana.edu>,
scott goehring <sgoehrin@copper.ucs.indiana.edu> wrote:
> strictly speaking, any system that allows interrupts is preemptive, in
> that an interrupt can preempt the running process in order to service
> the interrupt.

That is the definition I was using.

> i make the distinction between preemptive and
> nonpreemptive based on whether an interrupt can cause rescheduling.

In that case the overhead for preemption over batch is a grand total of
one instruction per interrupt if nothing is waiting to run, and negative
if something is waiting (because in a cooperative system you would have
been unable to run that task).
-- 
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<3vh2hc$9dd@falcon.ccs.uwo.ca> <41frv1$7m4@usenet.ucs.indiana.edu> <41g14g$efj@bmtlh10.bnr.ca> <41itqp$4ij@usenet.ucs.indiana.edu>

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Newsgroups: comp.sys.powerpc,comp.os.linux.advocacy,comp.sys.mac.advocacy,comp.os.os2.advocacy,comp.sys.amiga.advocacy,comp.sys.intel,alt.2600,comp.os.ms-windows.advocacy
Path: arc1-ca.pugleaf.net!uuneo.neosoft.com!nmtigw!peter
From: peter@nmti.com (Peter da Silva)
Subject: Re: Ask yourself these before you choosing a 32bit OS...
Message-ID: <id.69WM1.S73@nmti.com>
Sender: peter@nmti.com (peter da silva)
Organization: Network/development platform support, NMTI
References: <3vh2hc$9dd@falcon.ccs.uwo.ca> <41frv1$7m4@usenet.ucs.indiana.edu> <41g14g$efj@bmtlh10.bnr.ca> <41itqp$4ij@usenet.ucs.indiana.edu>
Date: Mon, 28 Aug 1995 18:07:30 GMT

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