- 期刊
- OpenAccess
A Methology for Improving the Performance of Paravirtual I/O Systems Based on Fast NVM Devices
摘要
Paravirtual I/O systems have been paid much attention to due to their reasonable performance levels. To increase these levels, Non-Volatile Memory (NVM) such as flash memory is considered and used as their storage media alternative to HDD. Although the storage media is fast, the performance of paravirtual I/O systems using the media is much lower than expected. The performance is lowered because the I/O process in the guest and host OSes is serialized and the OSes are run ignoring the processor affinity while the same software layers performing I/O are duplicated in the OSes. We present our methodology to employ towards optimizing the performance of NVM-based paravirtual I/O systems: the use of polling rather than interrupt, and parallel batching in order to maximize the parallelism in performing the sequence of I/O operations, and avoidance of context switches in order to consider the processor affinity. Our experiments with Kernel Virtual Machine (KVM) I/O systems using different NVM storage devices suggest that the use of the methodology can lead to enhancements in throughput by 50% to more than 80% while reducing CPU usage by up to 25% for a microbenchmark program and by up to 100% for workloads in mixed-read/write patterms.
延伸閱讀
- Lai, C. K. (2016). Virtual Performance Monitoring and Analysis for Heterogeneous Architectures [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU201602849
- Wang, D. C. (2006). An Efficient Mechanism for Performance Optimization of Variable-Latency Designs [master's thesis, National Tsing Hua University]. Airiti Library. https://doi.org/10.6843/NTHU.2006.00112
- Huang, C. W. (2014). Performance and Energy Optimization of Embedded Memory Systems [doctoral dissertation, National Chiao Tung University]. Airiti Library. https://doi.org/10.6842/NCTU.2014.01110
- Chen, J. H. (2007). System-Level Performance Profiling and Simulation Framework for I/O-Intensive Applications [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2007.03289
- 王俊傑（2019）。Performance-Driven Simultaneous Partitioning and Routing onMulti-FPGA Systems〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU201902811