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xen-devel
Re: [Xen-devel] how can native driver response quickly for low FIFO devi
On 25 May 2006, at 15:21, Dong, Eddie wrote:
Oo, understand UART is handled by Xen, Is this because of this reason?
or for debug/console use, and how about other devices?
If a user has an PCI card with 8 UART in the box, will we have problem?
thx,eddie
Oh, now I see your point. Yes, for any serial device not handled by Xen
you could have a scheduling problem. Other examples include telephony
interface cards and their drivers (e.g., zaptel). Higher-rate UARTs do
tend to support bigger FIFOs in hardware though. Best bet if it really
matters is to dedicate a logical processor to the domain that owns the
hardware.
-- Keir
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