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z/OS SMT: Understanding the Measurements and Applicability


Presentation

Should you enable Simultaneous Multithreading (SMT) on your z13, z13s, or z14 for your zIIP workloads? That is an interesting question that doesn’t have an easy answer. If you do enable SMT you should be prepared to review a number of SMT-specific measurements as well as your standard application measurements. Unfortunately, these are some of the most confusing, misunderstood, and poorly documented measurements in all of the SMF data.

Join Scott Chapman in this session as he explores the meaning and derivations of the SMT measurements and then presents existing measurements that may be useful in determining if SMT should even be explored. A decision tree for deciding whether to stay in single-threaded mode or try SMT-2 will be introduced.

(LL)

Stream: zCMPA
Room: Woodcote
Time: 12:00 - 13:00

Attachments

LL Attachments

Speakers


  • Scott Chapman at EPS
  • • Scott Chapman joined EPS in 2014 as Director of Software Design and Development, Seminar Instructor and Performance expert. He has over two decades of experience in the IBM mainframe environment, with much of this experience focused on performance, from both the application and systems perspective • His mainframe responsibilities have included most facets of keeping a mainframe environment running effectively, from application development and performance tuning to software cost management and Sysplex and WLM configuration. • Scott was chosen as Computer Measurement Group's 2009 Mullen award winner, and also co-authored CMG's 2012 best paper. • Scott is a founding steering committee member of the Central Ohio Mainframe User's Group.


    Email: scott.chapman@epstrategies.com

  • Scott Chapman at EPS
  • • Scott Chapman joined EPS in 2014 as Director of Software Design and Development, Seminar Instructor and Performance expert. He has over two decades of experience in the IBM mainframe environment, with much of this experience focused on performance, from both the application and systems perspective • His mainframe responsibilities have included most facets of keeping a mainframe environment running effectively, from application development and performance tuning to software cost management and Sysplex and WLM configuration. • Scott was chosen as Computer Measurement Group's 2009 Mullen award winner, and also co-authored CMG's 2012 best paper. • Scott is a founding steering committee member of the Central Ohio Mainframe User's Group.


    Email: scott.chapman@epstrategies.com

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