2009/12/7 Paul Brook <p...@codesourcery.com>: > 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.
That's what I thought, but as I reported a few days ago, I couldn't find a good value for icount when using OBP. I tried a few values but keep getting "qemu: fatal: Raised interrupt while not in I/O function". Also I got a report from other person where qemu crashed with another message: "qemu: fatal: Trap 0x29 while interrupts disabled". What could be a good value for -icount? Is it host-cpu specific? Isn't it a bug that qemu crashes [at least] on some icount values?
