z/VM Performance Report
Table of Contents
Notices
Programming Information
Trademarks
Acknowledgements
Introduction
Update Log
Referenced Publications
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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