I think the answer is that zSeries Linux scales to more than 4
processors. This is obviously workload dependent. Not sure what you
mean by "negative" if you mean that 4 processors get less work done than
3, probably won't see that on zSeries. If you mean that you get less than
4X the uniprocessor performance you will see that on most workloads on
virtually all machines. If you mean that you see less throughput on linux
4ways than on windows 4 ways, you may or may not see it on zLinux. This
will depend on whether the z hardware overcomes whatever software advantage
that Windows has. (The two effects will mitigate each other but are not
really related, so there is no single answer.)
Joe Temple
Sr. Consulting Sr. Certified IT Specialist
[EMAIL PROTECTED]
845-435-6301 295/6301 cell 914-706-5211 home 845-338-8794
Walter Wojcik
<[EMAIL PROTECTED] To: [EMAIL PROTECTED]
com> cc:
Sent by: Linux on Subject: Performance with Multiple CPUs
390 Port
<[EMAIL PROTECTED]
IST.EDU>
06/22/2004 11:58
AM
Please respond to
Linux on 390 Port
Does anyone have experience running zLinux in an LPAR which has multiple
CPUs defined? We have experienced negative performance characteristics
with Intel Linux versions (RedHat, SUSSE) when the Intel machine had 4
processors. We were wondering if the same performance degradations appear
on the mainframe.
Walter E. Wojcik
[EMAIL PROTECTED]
phone: (781) 301-2000
fax: (781) 301-2001
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