Hi, We are measuring the execution time between native machine environment and xen virtualization environment using PARSEC Benchmark [1].
In virtualiztion environment, we run a domU with three VCPUs, each of them pinned to a core; we pin the dom0 to another core that is not used by the domU. Inside the Linux in domU in virtualization environment and in native environment, We used the cpuset to isolate a core (or VCPU) for the system processors and to isolate a core for the benchmark processes. We also configured the Linux boot command line with isocpus= option to isolate the core for benchmark from other unnecessary processes. We expect that execution time of benchmarks in xen virtualization environment is larger than the execution time in native machine environment. However, the evaluation gave us an opposite result. Below is the evaluation data for the canneal and streamcluster benchmarks: Benchmark: canneal, input=simlarge, conf=gcc-serial Native: 6.387s Virtualization: 5.890s Benchmark: streamcluster, input=simlarge, conf=gcc-serial Native: 5.276s Virtualization: 5.240s Is there anything wrong with our evaluation that lead to the abnormal performance results? Any suggestion or advice is really appreciated. Thank you very much for your time on this question! Best regards, Meng [1] http://parsec.cs.princeton.edu/ ----------- Meng Xu PhD Student in Computer and Information Science University of Pennsylvania http://www.cis.upenn.edu/~mengxu/ _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
