Performance Profiling of VMs on NUMA Multicore Platform by Inspecting the Uncore Data Flow

Recentlly, NUMA(Non-Uniform Memory Access) multicore platform becomes more and more popular which provides hardware level support for many hot fields, such as cloud computing and big data, and deploying virtual machines on NUMA is a key technology. However, performance degradation in virtual machine isn´t negligible due to the fact that guest OS has little or inaccurate knowledge about the underlying hardware. Our research will focus on performance profiling of VMs on multicore platform by inspecting the uncore data flow, and we design a performance profiling tool called VMMprof based on PMU(Performance Monitoring Units). It supports the uncore part of the processor, which is a new function beyond the capabilities of those existing tools. Experiments show that VMMprof can obtain typical factors which affect the performance of the processes and the whole system.