IBM Systems Magazine, Mainframe - January/February 2017 - SE27


PARTNER PERSPECTIVE
((( SPONSORED AVER TISING CONTENT )))

STOP THROTTLING THAT
FERRARI: GET BETTER GAS

JOHN BAKER
z Performance Specialist
MVS Solutions

John has been analyzing and
tuning MVS systems for over
20 years. He never trusts a
computer he can lift.

MVS Solutions Inc.
ThruPut Manager
#400 - 8300 Woodbine Ave.
Markham, ON, L3R 9Y7, Canada
(905) 940-9404
marketing@thruputmanager.com
thruputmanager.com

Today, we seem to be reaching the upper limits of CPU power in terms of raw clock speed.
The latest IBM z Systems* machine (z13*) has a lower clock speed than its predecessor,
the EC12*-yet the z13 achieves a 12 percent average improvement in total capacity
according to the Large System Performance Reference (LSPR). How is this possible?
The primary capacity bottleneck today is not in the capability of the CPU to execute
instructions; it's in the capability of the supporting infrastructure to keep the CPU
supplied with a steady stream of data and instructions to process. This critical task
falls to the CPU caches.
All modern CPU designs make use of multilevel caches in order to achieve this important
goal. In the z13, the small but fast L1 and L2 caches are dedicated to each CPU core.
Further out, there are larger L3, L4, and main memory caches that are shared among
CPUs. In IBM z Systems architecture, these shared cache areas are referred to as the nest.
The z13 CPUs "spin" at a rate of 5 GHz-5 billion cycles per second. In traditional
capacity planning terms, this could be referred to as 5,000 MIPS. However, your actual
achieved MIPS rate largely depends on how many cycles are wasted waiting for data
or instructions to be fetched from the processor caches. You likely only need a few
cycles to fetch from the local L1 or L2 caches. The deeper and more often you need
to go into the nest, the greater the cost in lost cycles. This measurement is known as
Relative Nest Intensity (RNI).
How do you optimize access to processor caches? Many factors are simply beyond
practical controls, however actions can be taken:
* Study your SMF 113 records to understand your processor cache efficiency
* Limit processor sharing among LPARs by setting PR/SM weights carefully and
balancing logical and physical CPUs; in a Hiperdispatch context, try to avoid
"Vertical Low" polarized CPs
* Reuse data in caches by minimizing the number of diverse applications and limit
concurrency in LPARs (automate batch initiators and CICS*/IMS* regions)
* Automate input queues to control CPU utilization (to avoid processor overload)
It's not about the engine; it's about the fuel. If you're not keeping the engine well
fed, you're just spinning your wheels.

ibmsystemsmag.com/buyersguide 2017 // 27

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11/30/16 1:26 PM


http://www.thruputmanager.com https://www.linkedin.com/company/mvs-solutions-inc. https://www.youtube.com/channel/UCBm3mWiuRwL0ChTKQMxevbg http://www.ibmsystemsmag.com/buyersguide

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - January/February 2017

Table of Contents
Editor's Desk: Loads of Options
Techbits:
Infographic: Your Route to Digital Innovation
Partner PoV: Ignite Innovation: Optimize Linux on z Systems with adaptation, analytics and collaboration
Currents: Great Gains: Hybrid cloud adopters gain competitve advantages
Focus on Storage: Storage in a Flash: Improve performance and efficiency with hybrid and all-flash storage
Cover Story: Mainframe Options: IBM z Systems supports modern languages, tools, optimization and processes
Feature: Unleash Business Applications: IBM Application Discovery unlocks new value and accelerates the adoption of hybrid cloud solutions
Tech Trends: What Keeps IT Leaders Up at Night? Cloud computing is cited as top priority
Tech Corner: Healthy Status: z/OS Health Checker features productivity and ease-of-use enhancements
Solutions: BoxScore II, H&W Computer Systems; CleverView for TCP/IP V9.1, AES; ISPW Deploy, Compuware
Stop Run: Data Points to Love: IBMer combines marketing, technology expertise to help others navigate online dating
Reference Point - Global Events, Education, Resources for Mainframe
2017 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe - January/February 2017 - Intro
IBM Systems Magazine, Mainframe - January/February 2017 - Cover1
IBM Systems Magazine, Mainframe - January/February 2017 - Cover2
IBM Systems Magazine, Mainframe - January/February 2017 - 1
IBM Systems Magazine, Mainframe - January/February 2017 - Table of Contents
IBM Systems Magazine, Mainframe - January/February 2017 - 3
IBM Systems Magazine, Mainframe - January/February 2017 - 4
IBM Systems Magazine, Mainframe - January/February 2017 - 5
IBM Systems Magazine, Mainframe - January/February 2017 - Editor's Desk: Loads of Options
IBM Systems Magazine, Mainframe - January/February 2017 - 7
IBM Systems Magazine, Mainframe - January/February 2017 - Techbits:
IBM Systems Magazine, Mainframe - January/February 2017 - Infographic: Your Route to Digital Innovation
IBM Systems Magazine, Mainframe - January/February 2017 - Partner PoV: Ignite Innovation: Optimize Linux on z Systems with adaptation, analytics and collaboration
IBM Systems Magazine, Mainframe - January/February 2017 - 11
IBM Systems Magazine, Mainframe - January/February 2017 - Currents: Great Gains: Hybrid cloud adopters gain competitve advantages
IBM Systems Magazine, Mainframe - January/February 2017 - 13
IBM Systems Magazine, Mainframe - January/February 2017 - 14
IBM Systems Magazine, Mainframe - January/February 2017 - Focus on Storage: Storage in a Flash: Improve performance and efficiency with hybrid and all-flash storage
IBM Systems Magazine, Mainframe - January/February 2017 - 16
IBM Systems Magazine, Mainframe - January/February 2017 - 17
IBM Systems Magazine, Mainframe - January/February 2017 - Cover Story: Mainframe Options: IBM z Systems supports modern languages, tools, optimization and processes
IBM Systems Magazine, Mainframe - January/February 2017 - 19
IBM Systems Magazine, Mainframe - January/February 2017 - 20
IBM Systems Magazine, Mainframe - January/February 2017 - 21
IBM Systems Magazine, Mainframe - January/February 2017 - 22
IBM Systems Magazine, Mainframe - January/February 2017 - Feature: Unleash Business Applications: IBM Application Discovery unlocks new value and accelerates the adoption of hybrid cloud solutions
IBM Systems Magazine, Mainframe - January/February 2017 - 24
IBM Systems Magazine, Mainframe - January/February 2017 - 25
IBM Systems Magazine, Mainframe - January/February 2017 - 26
IBM Systems Magazine, Mainframe - January/February 2017 - 27
IBM Systems Magazine, Mainframe - January/February 2017 - Tech Trends: What Keeps IT Leaders Up at Night? Cloud computing is cited as top priority
IBM Systems Magazine, Mainframe - January/February 2017 - 29
IBM Systems Magazine, Mainframe - January/February 2017 - 30
IBM Systems Magazine, Mainframe - January/February 2017 - 31
IBM Systems Magazine, Mainframe - January/February 2017 - Tech Corner: Healthy Status: z/OS Health Checker features productivity and ease-of-use enhancements
IBM Systems Magazine, Mainframe - January/February 2017 - 33
IBM Systems Magazine, Mainframe - January/February 2017 - 34
IBM Systems Magazine, Mainframe - January/February 2017 - 35
IBM Systems Magazine, Mainframe - January/February 2017 - 36
IBM Systems Magazine, Mainframe - January/February 2017 - 37
IBM Systems Magazine, Mainframe - January/February 2017 - Solutions: BoxScore II, H&W Computer Systems; CleverView for TCP/IP V9.1, AES; ISPW Deploy, Compuware
IBM Systems Magazine, Mainframe - January/February 2017 - 39
IBM Systems Magazine, Mainframe - January/February 2017 - Stop Run: Data Points to Love: IBMer combines marketing, technology expertise to help others navigate online dating
IBM Systems Magazine, Mainframe - January/February 2017 - Cover3
IBM Systems Magazine, Mainframe - January/February 2017 - Cover4
IBM Systems Magazine, Mainframe - January/February 2017 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - January/February 2017 - SE
IBM Systems Magazine, Mainframe - January/February 2017 - 2017 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe - January/February 2017 - SE2
IBM Systems Magazine, Mainframe - January/February 2017 - SE3
IBM Systems Magazine, Mainframe - January/February 2017 - SE4
IBM Systems Magazine, Mainframe - January/February 2017 - SE5
IBM Systems Magazine, Mainframe - January/February 2017 - SE6
IBM Systems Magazine, Mainframe - January/February 2017 - SE7
IBM Systems Magazine, Mainframe - January/February 2017 - SE8
IBM Systems Magazine, Mainframe - January/February 2017 - SE9
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IBM Systems Magazine, Mainframe - January/February 2017 - SE11
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