NDLI: Analyzing and improving mpi communication performance in overcommitted virtualized systems.

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Analyzing and improving mpi communication performance in overcommitted virtualized systems.

Content Provider	CiteSeerX
Author	Shao, Zhiyuan Wang, Qiang Xie, Xuejiao Jin, Hai He, Ligang
Abstract	Abstract—Nowadays, it is an important trend in the system domain to use the software-based virtualization technology to build the execution environments (e.g., Clouds) and serve high performance computing (HPC) applications. However, with the extra virtualization layer, the application performance may be negatively affected. Studies revealed that the communication performance of the MPI library, which is widely used by the HPC applications, would suffer a high penalty when a physical host machine becomes overcommitted by virtual processors (VCPU). Unfortunately, the problem has not received enough attention and has not been solved yet in literature. In this paper, we investigate the reasons behind the performance penalty, and propose a solution to improve the communication performance of running MPI applications in the overcommitted virtualized systems. The experimental results show that by our proposal, most HPC applications can gain performance improvement to different extents among the overcommitted systems, depending on their communication patterns and the overcommitting level. Keywords-virtualization; cloud; MPI; performance; I.
File Format	PDF
Access Restriction	Open
Subject Keyword	Overcommitted Virtualized System Improving Mpi Communication Performance Communication Performance Hpc Application Execution Environment Mpi Application Physical Host Machine Becomes Mpi Library High Penalty Important Trend Application Performance Communication Pattern Extra Virtualization Layer Enough Attention Overcommitted System Virtual Processor Abstract Nowadays Software-based Virtualization Technology Performance Improvement System Domain High Performance Computing Performance Penalty Different Extent Experimental Result
Content Type	Text

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