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Re: [Qemu-devel] irq latency and tcg
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From: |
Paul Brook |
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Subject: |
Re: [Qemu-devel] irq latency and tcg |
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Date: |
Mon, 7 Dec 2009 15:06:02 +0000 |
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User-agent: |
KMail/1.12.2 (Linux/2.6.31-1-amd64; KDE/4.3.2; x86_64; ; ) |
On Monday 07 December 2009, Artyom Tarasenko wrote:
> Can it be that qemu (-system-sparc in my case, but I guess it's more
> or less similar on all platforms) reacts to irqs slower than a real
> hardware due to tcg optimizations?
Interrupts generally only trigger at branch instructions, or similar.
Using -icount should give you precise interrupt delivery.
Paul