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CA SYSVIEW How to determine if Simultaneous Multithreading (SMT) is being used/ enabled

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Article ID: 190496

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Updated On:

Products

SYSVIEW Performance Management NXBRIDGE - SYSVIEW/ENDEVOR

Issue/Introduction

Hyper APAR SO12995 states the problem it corrects can only occur if Simultaneous Multithreading (SMT)  
is in use, where there are multiple threads per core.             

How to determine if SMT is enabled and being used  ?

Environment

Release : 15.0

Component : SYSVIEW

Resolution

IBM LOADxx parmlib option PROCVIEW CORE|CPU enables/disables SMT for the life of the IPL
• PROCVIEW CORE on z13 enables SMT support
• IPL required to switch between PROCVIEW CPU and CORE

Additional Information

Simultaneous multithreading (SMT) allows two active instruction  streams per core, each dynamically sharing the core's execution 
resources. SMT is available on the z13 for workloads running on the IFL and the IBM z Integrated Information Processor (zIIP). 
SMT is disabled by default.