On Fri, Feb 26, 2016 at 12:02:50AM -0500, Meng Xu wrote: > Hi, > Hey!
CC-ing Elena. > 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. You may want to just offline them and also boot the machine with NUMA disabled. > > 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? Nothing is wrong. Virtualization is naturally faster than baremetal! :-) No clue sadly. > > 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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
