Re: Benchmarking Xen (results and questions)

[Andrew Theurer <habanero@us.ibm.com>]

David_Wolinsky@Dell.com 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