[Xen-devel] [PATCH] Add DOM0_GETDOMAININFOLIST op for bulk retrieval of domain info

[Josh Triplett <josht@xxxxxxxxxx>]

The attached patch adds a new dom0_op, DOM0_GETDOMAININFOLIST.  This
operation allows retrieval of the domain info structures for all domains
in one hypercall.

Using a small test program, on a system with 97 domains with
non-contiguous domain IDs, I found that with this hypercall I could
retrieve the full array of info structures 12840 times per second, an
improvement from 2380 times per second with the DOM0_GETDOMAININFO op.

The patch also adds a libxc wrapper for this new hypercall.

- Josh Triplett

Attachment: xen-getdomaininfolist.patch
Description: Text Data

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