Journal of KIISE (정보과학회 논문지)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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Para-virtualized Library for Bare-metal Network Performance in Virtualized Environment

가상화 환경의 고성능 I/O를 위한 반가상화 라이브러리

  • 이동우 (성균관대학교 정보통신대학) ;
  • 조영중 (성균관대학교 정보통신대학) ;
  • 엄영익 (성균관대학교 정보통신대학)
  • Received : 2013.07.10
  • Accepted : 2014.05.15
  • Published : 2014.09.15
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Abstract

Now, virtualization is no more emerging research area, and we can easily find its application in our circumstance. Nevertheless, I/O workloads are reluctant to be applied in virtual environment since they still suffer from unacceptable performance degradation due to virtualization latency. Many previous papers identified that virtual I/O overhead is mainly caused by exits and redundant I/O stack, and proposed several techniques to reduce them. However, they still have some limitations. In this paper, we introduce a novel I/O virtualization framework which improves I/O performance by exploiting multicore architecture. We applied our framework to the virtual network, and it improves TCP throughput up to 169%, and decreases UDP latency up to 38% on the network with the 10Gbps NIC.

현재 가상화 기술은 많은 연구를 통해 다양한 분야에서 널리 쓰이고 있다. 그러나 여전히 I/O 워크로드는 가상화로 인한 성능 저하로 인하여 가상화 분야에 적용되지 못하고 있다. 이전의 많은 연구에서 가상화 I/O 과정의 모드전환과 중복된 I/O 스택을 이러한 성능 저하의 원인으로 파악하고, 이를 해결하기 위한 기법을 제안하였으나 여전히 가상화 되지 않은 환경의 물리장치에 비해 낮은 성능을 보여주었다. 본 논문에서는 가상화 라이브러리를 사용하는 새로운 I/O 가상화 기법을 제안한다. 본 제안기법은 가상화 I/O 과정에서 발생하는 모드 전환을 완전히 제거하고 게스트 운영체제의 I/O 스택을 우회함으로써 /O 성능을 향상 시킨다. 네트워크 환경을 위한 프로토타입 구현을 통해 본 제안기법은 네트워크 처리량을 169% 향상시키며 네트워크 지연을 38% 감소시킴을 확인하였다.

Keywords

Acknowledgement

Supported by : 한국연구재단

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