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xen-devel
Re: [Xen-devel] [PATCH]Add free memory size of every NUMA node in phsica
On Tue, Feb 26, 2008 at 10:46:17AM +0800, Duan, Ronghui wrote:
> I see that, the reason I don't use that function is there need one more
> time hypercall, I only reuse the function which have been realized in
> hypervisor. Thanks for your advice.
The performance impact of doing 1 extra hypercall for 'availheap' is
completely irrelevant in this context. The time for 1 extra hypercall
is dwarfed (by several orders of magnitude) by the overhead due to
'xm' and 'xend' being in python & using XML-RPC. We should just use
the existing hypercall & not worry about time overhead we'll never
notice.
Dan.
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