Vmware, Inc.

Timothy Merrifield

Petr Vandrovec

Xunjia Lu

James White

Jayneel Gandhi

Christopher John Rossbach

Various approaches for exposing a virtual Non-Uniform Memory Access (NUMA) locality table to the guest OS of a VM running on NUMA system are provided. These approaches provide different tradeoffs between the accuracy of the virtual NUMA locality table and the ability of the system's hypervisor to migrate virtual NUMA nodes, with the general goal of enabling the guest OS to make more informed task placement/memory allocation decisions.

Virtual non-uniform memory access (NUMA) locality table for NUMA systems

The disclosure provides an approach for tracking metadata (e.g., accessed and dirty bits) of page tables at finer granularity than the size of the page tables. A disclosed herein, modification to existing hardware design may enable finer page table granularity of metadata, leading to more precise representation of the state of memory and an improvement to system performance and efficiency. Finer grain dirty metadata can dramatically improve the efficiency and simplicity of subsystems.

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Austin, TX, United States of America

Timothy Merrifield