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Re: [Qemu-devel] Qemu workstation

From: Filip Navara
Subject: Re: [Qemu-devel] Qemu workstation
Date: Wed, 07 Apr 2004 09:59:02 +0200 (CEST)

Brad Campbell wrote:
> How does that work then?

I don't know the exact details.

> I have some code that uses a NOP loop for accurate
> timing? That spins at 100% cpu usage, how does a 
> NOP tell the processor to idle? HLT does.

HLT instruction halts the CPU so no more instructions are
processed and the CPU freezes. That's usable only in situation
like Windows blue screens.

- Filip

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