[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] File System Performance - 10x slower
Hello all I am evaluating File I/O performance using Xen & comparing it with baseline (Fedora Core 3, with 2.6.9 kernel). Here are the commands that I use for I/O write I/O: dd if=/dev/zero of=file1 bs=4K count=256K read I/O: dd of=/dev/null if=file1 bs=4K count=256K Here are some numbers (all test results are reported in MB/second) Read I/O - Baseline Fedora Core 3 - 32 - XEN domain 0 - 9.3 - XEN domain 1 - 2.3 Write I/O - Baseline Fedora Core 3 - 22 - XEN domain 0 - 9.8 - XEN domain 1 - 2.5 - Dom0 (without starting xend) results in 2x slower performance - DomU results in 9-10x slower performance I get similar results for domain-1 using both File-based & LVM-based VBD Can someone why I am getting such huge difference in performance compared to baseline ?? Thanks Nauzad ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
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