z/VM Performance Report
Table of Contents
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Notices
Programming Information
Trademarks
Acknowledgements
Introduction
Update Log
Referenced Publications
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 2G
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
Glossary of Performance Terms
Footnotes
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