The Preliminary Evaluation of a Hypervisor-based Virtualization Mechanism for Intel Optane DC Persistent Memory Module
share
Non-volatile memory (NVM) technologies, being accessible in the same manner as DRAM, are considered indispensable for expanding main memory capacities. Intel Optane DCPMM is a long-awaited product that drastically increases main memory capacities. However, a substantial performance gap exists between DRAM and DCPMM. In our experiments, the read/write latencies of DCPMM were 400 407 37 challenge to researchers; we need a new system software technology supporting emerging hybrid memory architecture. In this paper, we present RAMinate, a hypervisor-based virtualization mechanism for hybrid memory systems, and a key technology to address the performance gap in main memory systems. It provides great flexibility in memory management and maximizes the performance of virtual machines (VMs) by dynamically optimizing memory mappings. Through experiments, we confirmed that even though a VM has only 1 performance degradation of the VM was drastically alleviated by memory mapping optimization. The elapsed time to finish the build of Linux Kernel in the VM was 557 seconds, which was only 13 seconds). When the optimization mechanism was disabled, the elapsed time increased to 624 seconds (i.e. 26
READ FULL TEXT