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Re: [Qemu-devel] Deterministic replay
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From: |
Paul Brook |
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Subject: |
Re: [Qemu-devel] Deterministic replay |
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Date: |
Wed, 22 Dec 2010 12:35:13 +0000 |
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User-agent: |
KMail/1.13.5 (Linux/2.6.36-trunk-amd64; KDE/4.4.5; x86_64; ; ) |
> Hello.
>
> I am working on implementation of deteministic execution replay technology
> for Qemu. It should be similar to VMWare's replay debugging.
>
> To make alarm timer (which invokes host_alarm_handler function)
> determinisic, I changed it's behavior: it sets flag, that execution should
> be stopped and this flag is checked before every instruction in the
> translated code.
You don't need to do this. A much better solution is to not use the host timer
at all. See -icount.
Paul