On Tue, 27 Jan 2009 13:56:34 -0500, Alan Altmark <[email protected]
> 
wrote:

>Does this help?  (It's z/VM 5.3)
>http://www.vm.ibm.com/perf/reports/zvm/html/mt31cpus.html
>
>I infer from the chart that up to 6 CPUs, the MP effect is nearly
>unnoticeable.

As stated in the text, the chart shows the ratio of the MP effect between
 
the 2 z/VM releases using z/VM 5.3 on 6 CPU's as the baseline.  For up to
 
6 CPU's the conclusion would be that both releases perform reasonably 
similarly.

To determine the magnitude of the MP effect at 6 CPU's would require 
running a test with 1 CPU and comparing the ITR ratios to see how close t
o 
a 6:1 ratio they are.

Brian Nielsen

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