Re: [Xen-devel][RFC]degradation on IPF due to hypercall set irq

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 22/11/06 7:55 am, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> wrote:

> Have an array of set_level hypercall structures, and an array of multicall
> structures. Fill them in at the point we currently do the hypercall. Flush
> when:
>  A) the array is already full; or
>  B) when qemu passes through its event loop.
> 
> Make the arrays 16 entries large, for example, will be plenty.
> 
> Use the same mechanism for the notification (i.e., add to the multicall
> array, to be flushed by qemu's main loop).

To clarify, by event/main loop I mean: Flush just before qemu blocks
(otherwise multicall can be held for unbounded time, unless we set a
batching timeout which hopefully we can avoid needing to do).

 -- Keir



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