IBM Systems Magazine, Mainframe - November/December 2013 - 33

threading multiplier, divided by
threads per core. The threading
multiplier is the increase
in throughput due to using
multiple threads per core. For
example, Simultaneous MultiThreading 4 (SMT4) on IBM
Power Systems* has a multiplier
of two, and the machine has
a frequency of around 4 GHz.
Therefore, in this case:
Ā
à Ã32:(5ůÃWKUHDGÃVSHHGÃIRUÃ
SMT4 ~ 4 x 2/4 = 2
ĀÃ7KHÃ32:(5ůÃVRFNHWÃKDVÃ
Ã
eight cores or 32 threads
à Ã32:(5ůÃ607ŬÃWKURXJKSXWÃ
Ā
~ 32 x 2 = 64
53(ŪÃLVÃDQÃDYHUDJHÃRIÃILYHÃ
EHQFKPDUNV)Ã63(&LQW5$7(Ã
63(&IS5$7(Ã63(&MEEÃ
6$3Ã6WDQGDUGÃ$SSOLFDWLRQÃ
%HQFKPDUNÃDQGÃ73&&Ã
/RRNLQJÃDWÃ)LJXUHÃũÃSDJHÃūŪÃ
KRZHYHUÃ53(ŪÃRIIHUVÃOLWWOHÃLIÃ
any insight into the relative
capacity of machines beyond
the value generated by simply
calculating TP from machine
specifications and claimed
threading benefits. This is
only part of the story, though,
particularly in the modern
world of cloud computing and
virtualization.

Machine Design
Parameters
Many machine design
parameters exist. However,
WKHÃPDMRUÃHOHPHQWVÃWKDWÃ
drive relative capacity are
thread speed, thread count
and cache per thread.
These elements are chosen
because they're the machine
design parameters that
have a primary effect on
NH\ÃSHUIRUPDQFHÃPHWULFVÃÃ
7KH\ùUHÃDOVRÃDÃPDMRUÃVRXUFHÃ
of differentiation between
machine designs. Figure 2
(page 34) illustrates this.

Note that clear trade-offs
exist. To run more threads, the
design must give up thread speed
and cache per thread. This is
shown by the decreasing bubble
size from the lower left to the

"

upper right in Figure 2. Thread
speed and cache per thread are
correlated in the illustration.
Faster threads require more cache
to leverage the thread speed. No
benefit is gained by going faster

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ibmsystemsmag.com NOVEMBER/DECEMBER 2013 // 33


http://www.sdsusa.com/ebusiness http://www.ibmsystemsmag.com

IBM Systems Magazine, Mainframe - November/December 2013

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - November/December 2013

Table of Contents
Editor's Desk: On the road with analytics
IBM Perspective: Extending IBM's commitment to big data and analytics
Trends: IBM Capacity Management Analytics for zEnterprise cost-effectively ensures optimal performance
IT Today: IBM DB2 Analytics Accelerator V4.1 expands the value of high-performance analytics
Case Study: The State of Consolidation: Oklahoma improves service levels by consolidating its IT on zEC12
Cover Story: Big Data's Big Impact: zEnterprise hybrid technology helps redefine business analytics
Feature: The System z Crystal Ball?: Teach the mainframe to predict the future using analytics and automation
Tech Corner: Alternative metrics deliver a more complete view of hardware for server RFPs
Administrator: QMF extends its analytics capabilities to help meet the demands of big data and mobile
Solutions: TestBase; Vanguard Offline
Stop Run: Historic property has much to teach retired IBMer
Reference Point - Global Events, Education, Resources for Mainframe
2014 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - November/December 2013 - Intro
IBM Systems Magazine, Mainframe - November/December 2013 - Cover1
IBM Systems Magazine, Mainframe - November/December 2013 - Cover2
IBM Systems Magazine, Mainframe - November/December 2013 - 1
IBM Systems Magazine, Mainframe - November/December 2013 - Table of Contents
IBM Systems Magazine, Mainframe - November/December 2013 - 3
IBM Systems Magazine, Mainframe - November/December 2013 - 4
IBM Systems Magazine, Mainframe - November/December 2013 - 5
IBM Systems Magazine, Mainframe - November/December 2013 - Editor's Desk: On the road with analytics
IBM Systems Magazine, Mainframe - November/December 2013 - 7
IBM Systems Magazine, Mainframe - November/December 2013 - IBM Perspective: Extending IBM's commitment to big data and analytics
IBM Systems Magazine, Mainframe - November/December 2013 - 9
IBM Systems Magazine, Mainframe - November/December 2013 - Trends: IBM Capacity Management Analytics for zEnterprise cost-effectively ensures optimal performance
IBM Systems Magazine, Mainframe - November/December 2013 - 11
IBM Systems Magazine, Mainframe - November/December 2013 - 12
IBM Systems Magazine, Mainframe - November/December 2013 - 13
IBM Systems Magazine, Mainframe - November/December 2013 - IT Today: IBM DB2 Analytics Accelerator V4.1 expands the value of high-performance analytics
IBM Systems Magazine, Mainframe - November/December 2013 - 15
IBM Systems Magazine, Mainframe - November/December 2013 - 16
IBM Systems Magazine, Mainframe - November/December 2013 - 17
IBM Systems Magazine, Mainframe - November/December 2013 - Case Study: The State of Consolidation: Oklahoma improves service levels by consolidating its IT on zEC12
IBM Systems Magazine, Mainframe - November/December 2013 - 19
IBM Systems Magazine, Mainframe - November/December 2013 - 20
IBM Systems Magazine, Mainframe - November/December 2013 - 21
IBM Systems Magazine, Mainframe - November/December 2013 - Cover Story: Big Data's Big Impact: zEnterprise hybrid technology helps redefine business analytics
IBM Systems Magazine, Mainframe - November/December 2013 - 23
IBM Systems Magazine, Mainframe - November/December 2013 - 24
IBM Systems Magazine, Mainframe - November/December 2013 - 25
IBM Systems Magazine, Mainframe - November/December 2013 - 26
IBM Systems Magazine, Mainframe - November/December 2013 - 27
IBM Systems Magazine, Mainframe - November/December 2013 - Feature: The System z Crystal Ball?: Teach the mainframe to predict the future using analytics and automation
IBM Systems Magazine, Mainframe - November/December 2013 - 29
IBM Systems Magazine, Mainframe - November/December 2013 - 30
IBM Systems Magazine, Mainframe - November/December 2013 - 31
IBM Systems Magazine, Mainframe - November/December 2013 - Tech Corner: Alternative metrics deliver a more complete view of hardware for server RFPs
IBM Systems Magazine, Mainframe - November/December 2013 - 33
IBM Systems Magazine, Mainframe - November/December 2013 - 34
IBM Systems Magazine, Mainframe - November/December 2013 - 35
IBM Systems Magazine, Mainframe - November/December 2013 - Administrator: QMF extends its analytics capabilities to help meet the demands of big data and mobile
IBM Systems Magazine, Mainframe - November/December 2013 - 37
IBM Systems Magazine, Mainframe - November/December 2013 - 38
IBM Systems Magazine, Mainframe - November/December 2013 - Solutions: TestBase; Vanguard Offline
IBM Systems Magazine, Mainframe - November/December 2013 - Stop Run: Historic property has much to teach retired IBMer
IBM Systems Magazine, Mainframe - November/December 2013 - Cover3
IBM Systems Magazine, Mainframe - November/December 2013 - Cover4
IBM Systems Magazine, Mainframe - November/December 2013 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - November/December 2013 - 2014 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - November/December 2013 - SE2
IBM Systems Magazine, Mainframe - November/December 2013 - SE3
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