z/VM Performance Report

Table of Contents

Notices

• Programming Information
• Trademarks
• Acknowledgements

Introduction

• Update Log
• Referenced Publications

New - z/VM Version 7 Release 4

• New Functions
  • Two-Speed Monitoring

z/VM Version 7 Release 3

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • NVMe EDEVs
  • Support for Guests Greater Than One Terabyte
  • Warning-Track Interruption Facility

z/VM Version 7 Release 2

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • SSL OCSP Support
  • 4 TB Exploitation
  • z/HPF I/O for Dumps
  • Guest Instruction Simulation Improvements
  • Dynamic Memory Downgrade
  • Host Exploitation of Crypto Interruptions
• Additional Evaluations
  • Dedicated OSA vs. VSwitch Update

z/VM Version 7 Release 1

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • Dump Improvements
  • TLS/SSL Elliptic Curve Support
  • Vswitch Priority Queueing
  • Eighty Logical Processors
  • Fast Minidisk Erase
  • TLS Certificate Verification

z/VM Version 6 Release 4

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • Memory Management Serialization Contention Relief
  • z/VM Paging Improvements
  • CP Scheduler Improvements
  • RSCS TCPNJE Encryption
  • TLS/SSL Server Changes
  • Concurrent I/O Support for XIV
  • Dump Channel Program Changes
  • Encrypted Paging
  • Unparking
  • Pause-Reduced Garbage Collection for Java

z/VM for z13

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • Simultaneous Multithreading
  • System Scaling Improvements

z/VM Version 6 Release 3

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • Storage Management Scaling Improvements
  • z/VM HiperDispatch
  • Dump Enhancements
  • CPU Pooling

z/VM Version 6 Release 2

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • Live Guest Relocation
  • Workload and Resource Distribution
  • ISFC Improvements
  • Storage Management Improvements
  • High Performance FICON

z/VM Version 5 Release 4

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • Dynamic Memory Upgrade
  • Specialty Engine Enhancements
  • DCSS Above 2 GB
  • TCP/IP Ethernet Mode Support
  • Telnet IPv6 Support
  • CMS-Based SSL Server

z/VM Version 5 Release 3

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • Improved Real Storage Scalability
  • Memory Management: VMRM-CMM and CMMA
  • Improved Processor Scalability
  • Diagnose X'9C' Support
  • Specialty Engine Support
  • SCSI Performance Improvements
  • z/VM HyperPAV Support
  • Virtual Switch Link Aggregation

z/VM Version 5 Release 2

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• Migration from z/VM 5.1.0
  • CP Regression Measurements
  • CP Disk I/O Performance
• New Functions
  • Enhanced Large Real Storage Exploitation
  • Extended Diagnose X'44' Fast Path
  • QDIO Enhanced Buffer State Management
  • z/VM PAV Exploitation
• Additional Evaluations
  • Linux Disk I/O Alternatives
  • Dedicated OSA vs Virtual Switch Comparison
  • Layer 3 and Layer 2 Comparisons
  • Guest Cryptographic Enhancements

z/VM Version 5 Release 1

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • 24-Way Support
  • Emulated FBA on SCSI
  • Internet Protocol Version 6 Support
  • Virtual Switch Layer 2 Support
• Additional Evaluations
  • z990 Guest Crypto Enhancements

z/VM Version 4 Release 4

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Management
• New Functions
  • Scheduler Lock Improvement
  • z/VM Virtual Switch
  • Queued I/O Assist
  • TCP/IP Stack Performance Improvements
  • TCP/IP Device Layer MP Support
• Additional Evaluations
  • Linux Guest Crypto on z990

z/VM Version 4 Release 3

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• New Functions
  • Enhanced Timer Management
  • VM Guest LAN: QDIO Simulation
  • Linux Guest Crypto Support
  • Improved Utilization of Large Real Storage
  • Accounting for Virtualized Network Devices
  • Large Volume CMS Minidisks
  • TCP/IP Stack Performance Improvements

z/VM Version 4 Release 2

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Management
• New Functions
  • HiperSockets and VM Guest Lan Support
  • 64-bit Fast CCW Translation
  • 64-bit Asynchronous Page Fault Service (PFAULT)
  • Guest Support for FICON CTCA
  • DDR LZCOMPACT Option
  • IMAP Server
• Additional Evaluations
  • Linux Connectivity Performance
  • Linux Guest DASD Performance

z/VM Version 4 Release 1

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Management
• New Functions
  • Fast CCW Translation for Network I/O

z/VM Version 3 Release 1

• Summary of Key Findings
• Changes That Affect Performance
  • Performance Improvements
  • Performance Considerations
  • Performance Management
• Migration from VM/ESA 2.4.0 and TCP/IP FL 320
  • CMS-Intensive
    • 2064 2-Way LPAR, 1G/2G
    • 2064-1C8, 2G/6G
    • 2064-1C8, 2G/10G
  • VSE/ESA Guest
  • TCP/IP
    • Telnet
    • FTP
  • Migration from Other VM Releases
  • New Functions
    • CP 64-Bit Support
      • Real Storage Sizes above 2 GB
      • Minidisk Cache with Large Real Storage
      • The 2G Line
    • Queued Direct I/O Support
    • Secure Socket Layer Support
  • Additional Evaluations
    • Linux Guest IUCV Driver
    • Virtual Channel-to-Channel Performance
    • Migration from VTAM to Telnet
    • Comparison of CMS1 to FS8F

Workloads

• AWM
• Apache
• IOzone
• Linux OpenSSL Exerciser
• z/OS SSL Performance Workload
• z/OS DB2 Utility Workload
• z/OS Java Encryption Performance Workload
• z/OS ICSF Performance Workload
• CMS-Intensive (FS8F)
• CMS-Intensive (CMS1)
• VSE Guest (DYNAPACE)
• z/OS File System Performance Tool
• z/OS IP Security Performance Workload
• Virtual Storage Exerciser
• Ping
• PFAULT
• BLAST
• ISFC Workload
• IO3390 Workload
• z/VM HiperDispatch Workloads
• Daytrader Workload
• Master Processor Workload
• PTOUCH Workload

Glossary of Performance Terms

Footnotes