Hi All, We are doing some performance testing of virtualization on Solaris Nevada build 87.
For the xVM case, we noticed a higher than expected overhead in Dom0. In an effort to make sense of it, we compared the results with a Linux system vs. its Dom0. We ran an apache compile on each system. Here are the compile time results: Solaris base 1m24.478sSolaris xVM Dom0 2m32.772s Linux base 1m32.632s Linux Dom0 1m54.301s As you can see there is much more overhead for the xVM Dom0 case relative to the Linux Dom0 case. Note that we are not comparing Solaris to Linux in a general sense, we are only comparing the overhead of the base compared to its Dom0. We have the complete output for the average of 3 trials that we ran on each, and the breakdown from the output of the time command included in a spreadsheet, which you can find here: http://spreadsheets.google.com/pub?key=pYKv0vD13oyMfkORpXSLDMQ In particular for the raw data we see that the overhead from the compile on the xVM Dom0 comes from the sys field (or time spent in system mode) Our understanding is that the Solaris port of Xen is working, but is still under heavy development. Is it the case that the Solaris Dom0, at least in build 87, is not optimized yet? And that the results we are seeing are in fact correct, but that work ongoing will show better Solaris Dom0 results in the future? We carefully compared the differences between Solaris base and xVM Dom0 Here are the process lists, with the xVM difference highlighted in yellow: http://docs.google.com/View?docid=dc5sf6db_122wmdfpfct All of Linux, Linux Dom0, Solaris base, and xVM are 64bit and SMP capable. The uname and isainfo commands follow. solaris-base# uname -a SunOS solaris 5.11 snv_87 i86pc i386 i86pc solaris-base# isainfo amd64 i386 xVM# uname -a SunOS solaris 5.11 snv_87 i86pc i386 i86xpv xVM# isainfo amd64 i386 The system details are: Dell OptiPlex 745 with a 2.4 GHz Intel Core 2 CPU 6600, 4 GB of RAM Thanks for you time and any feedback. Best Regards, Todd -- Todd Deshane http://todddeshane.net check out our book: http://runningxen.com
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