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...95 percentile: 0.02ms Threads fairness: events (avg/stddev): 652686.2500/1494.93 execution time (avg/stddev): 12.3390/0.02 </output> I was expecting dom0 to performa better than domU, so to debug more into it I ram lm_bench microbenchmarks. Experiment 2] bw_mem benchmark 1. ./bw_mem 1000m wr dom0 output: 1048.58 3640.60 domU output: 1048.58 4719.32 2. ./bw_mem 1000m rd dom0 output: 1048.58 5780.56 domU output: 1048.58 6258.32 Experiment 3] lat_syscall benchmark 1. ./lat_syscall write dom0 output: Simple write: 1.9659 microseconds domU outpu...

...low as from disk. I ran some of the lmbench tests both under xen and with native linux. Here are the results, with the "-" lines from xen and "+" lines from native linux. The results are pretty poor, and so is the feel of the machine under xen. Any hints on what to try next? bw_mem -0.131072 1068.95 +0.131072 4409.00 bw_pipe -Pipe bandwidth: 85.42 MB/sec +Pipe bandwidth: 989.19 MB/sec bw_unix -AF_UNIX sock stream bandwidth: 104.75 MB/sec +AF_UNIX sock stream bandwidth: 968.87 MB/sec lat_ctx -"size=0k ovr=3.15 -10 13.95 +"size=0k ovr=1.09 +10 0.94 lat_fcntl -Fcnt...