Messages in this thread | | | Date | Mon, 12 Dec 2011 18:21:48 +0100 | From | Ingo Molnar <> | Subject | Re: [patch 0/3] kvm tool: Serial emulation overhaul |
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* Sasha Levin <levinsasha928@gmail.com> wrote:
> > You can emulate a chip with a 64byte or so FIFO. You can do > > I/O cycle prediction in the kernel part and you can use the > > empty bit as a clue (which is what most serial<->ethernet > > widgetry does). > > The performance problems here aren't the same performance > problems you have on real hardware. The problem here is that > it costs 40k cycles for the guest to access the emulated chip.
I question that 40k cycles figure - where does Marcelo's paper mention it?
Thanks,
Ingo
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