Re: [Xen-devel] Benchmarking Xen (results and questions)

[Andrew Theurer <habanero@xxxxxxxxxx>]

David_Wolinsky@xxxxxxxx wrote:

> Hi all,
>
> Here are some benchmarks that I've done using Xen.
>
> However, before I get started, let me explain some of configuration 
> details…
> Xen Version SPECjbb
> WebBench
> Linux Distribution Debian 3.1
> HT disabled
> Linux Kernel 2.6.12.2
> Host Patch CK3s
>
> Here are the initial benchmarks
>
> SPECJBB WebBench
> 1 Thread 1 Client 2 Clients 4 Clients 8 Clients
> BOPS TPS TPS TPS TPS
> Host 32403.5 213.45 416.86 814.62 1523.78
> 1 VM 32057 205.4 380.91 569.24 733.8
> 2 VM 24909.25 NA 399.29 695.1 896.04
> 4 VM 17815.75 NA NA 742.78 950.63
> 8 VM 10216.25 NA NA NA 1002.81
>
> (and some more notes…. BOPS - business operations per second, TPS - 
> transactions per second…
> SPECjbb tests CPU and Memory
> WebBench (the way we configured it) tests Network I/O and Disk I/O
>
> Values = AVG * VM count
> Domain configurations
> 1 VM - 1660 MB - SPECJBB 1500MB
> 2 VM - 1280 MB - SPECJBB - 1024MB
> 4 VM - 640 MB - SPECJBB - 512 MB
> 8 VM - 320 MB - SPECJBB - 256 MB
>
> Seeing how the SPECjbb numbers declined so bizarrely, I did some 
> scheduling tests and found this out…
> Test1: Examine Xen's scheduling to determine if context switching is 
> causing the overhead
> Period Slice BOPs
> Modified 8 VM 1 ms 125 us 6858
> 8 VM 10 ms 1.25 ms 14287
> 8 VM 100 ms 12.5 ms 18912
> 8 VM 1 Sec .125 Sec 20695
> 8 VM 2 Sec .25 Sec 21072
> 8 VM 10 Sec 1.25 Sec 21797
> 8 VM 100 Sec 12.5 Sec 11402
Did you run each JBB test config several times to ensure consistent 
results? What JVM is this?
Would it be possible to format these more appropriately for email? I am 
having a little trouble reading this :)
Thanks,

-Andrew


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