Advanced POWER virtualization on IBM eServer p5 servers : architecture and performance considerations / Ben Gibbs et al.

Format:

Book

Author/Creator:

Gibbs, G. Benton.

Contributor:

Pulles, Margo.

Series:

IBM redbooks.

Redbooks

Language:

English

Subjects (All):

Virtual computer systems.

Client/server computing.

Physical Description:

1 online resource (436 p.)

Place of Publication:

Austin, TX : IBM, International Technical Support Organization, 2005.

Language Note:

English

Contents:

Intro

Contents

Notices

Trademarks

Preface

The specialists who wrote this redbook

Become a published author

Comments welcome

Part 1 Virtualization technology

Chapter 1. Introduction

1.1 Performance tuning redefined

1.1.1 Understanding performance

1.1.2 Performance considerations

Chapter 2. IBM POWER5 architecture

2.1 Introduction

2.2 Chip design

2.3 POWER5 enhancements

2.4 POWER5 instruction pipelines

2.4.1 Instruction fetching

2.4.2 Branch prediction

2.4.3 Instruction decoding and preprocessing

2.4.4 Group dispatch

2.4.5 Register renaming

2.4.6 Instruction execution

2.5 Caches

2.5.1 Level 2 (L2) cache

2.5.2 Level 3 (L3) cache

2.5.3 Summary of caches on POWER5

2.5.4 Address translation resources

2.6 Timing facilities

2.7 Dynamic power management

2.8 Processor Utilization Resource Register (PURR)

2.9 Large POWER5 SMPs

2.10 Summary

Chapter 3. Simultaneous multithreading

3.1 What is multithreading?

3.2 POWER5 simultaneous multithreading features

3.2.1 Dynamic switching of thread states

3.2.2 Snooze and snooze delay

3.3 Controlling priority of threads

3.3.1 Dynamic resource balancing (DRB)

3.3.2 Adjustable thread priorities

3.3.3 Thread priority implementation

3.4 Software considerations

3.4.1 Simultaneous multithreading aware scheduling

3.4.2 Thread priorities on AIX 5L V5.3

3.4.3 Thread priorities on Linux

3.4.4 Cache effects

3.5 Simultaneous multithreading performance

3.5.1 Engineering and scientific applications

3.5.2 Simultaneous multithreading benchmarks

3.6 Summary

Chapter 4. POWER Hypervisor

4.1 POWER Hypervisor implementation

4.1.1 POWER Hypervisor functions

4.1.2 Micro-Partitioning extensions

4.1.3 POWER Hypervisor design

4.2 Performance considerations.

Chapter 5. Micro-Partitioning

5.1 Partitioning on the IBM eServer p5 systems

5.2 Micro-Partitioning implementation

5.2.1 Virtual processor dispatching

5.2.2 Phantom interrupts

5.3 Performance considerations

5.3.1 Micro-Partitioning considerations

5.3.2 Locking considerations

5.3.3 Memory affinity considerations

5.3.4 Idle partition consideration

5.3.5 Application considerations in Micro-Partitioning

5.3.6 Micro-Partitioning planning guidelines

5.4 Summary

Chapter 6. Virtual I/O

6.1 Introduction

6.2 POWER Hypervisor support for virtual I/O

6.2.1 Virtual I/O infrastructure

6.2.2 Types of connections

6.3 The IBM Virtual I/O Server

6.3.1 Providing high availability support

6.4 Virtual Serial Adapter (VSA)

6.5 Virtual Ethernet

6.5.1 Virtual LAN

6.5.2 Virtual Ethernet connections

6.5.3 Benefits of virtual Ethernet

6.5.4 Limitations and considerations

6.5.5 POWER Hypervisor switch implementation

6.5.6 Performance considerations

6.5.7 VLAN throughput at different processor entitlements

6.5.8 Comparing throughput of VLAN to physical Ethernet

6.5.9 Comparing CPU utilization

6.5.10 Comparing transaction rate and latency

6.5.11 VLAN performance

6.5.12 VLAN implementation guidelines

6.6 Shared Ethernet Adapter

6.6.1 Shared Ethernet Adapter performance

6.6.2 Request/response time and latency

6.7 Implementation guidelines

6.7.1 Guidelines for Shared Ethernet Adapter sizing

6.7.2 Guidelines for physical Ethernet sizing

6.7.3 Control of threading in the Shared Ethernet Adapter

6.8 Virtual SCSI

6.8.1 Client and server interaction

6.8.2 AIX 5L V5.3 device configuration for virtual SCSI

6.8.3 Interpartition communication

6.8.4 Disk considerations

6.8.5 Configuring for redundancy

6.8.6 Performance considerations.

6.8.7 Sizing a virtual SCSI server

6.9 Summary

Part 2 Virtualization support and tuning

Chapter 7. AIX 5L Version 5.3 operating system support

7.1 Introduction

7.1.1 Processors

7.1.2 Dynamic re-configuration

7.1.3 Existing performance commands enhancement

7.1.4 New performance commands

7.1.5 Paging space

7.1.6 Logical Volume Manager (LVM)

7.1.7 Virtual local area network (VLAN)

7.1.8 EtherChannel

7.1.9 Partition Load Manager

Chapter 8. POWER5 system performance

8.1 Performance commands

8.1.1 lparstat command

8.1.2 mpstat command

8.1.3 vmstat command

8.1.4 iostat command

8.1.5 sar command

8.1.6 topas command

8.1.7 xmperf command

8.2 Performance tuning approach

8.2.1 Global performance analysis

8.2.2 CPU analysis

8.2.3 Memory analysis

8.2.4 Disk I/O analysis

8.2.5 Network I/O analysis

Chapter 9. Application tuning

9.1 Performance bottlenecks identification

9.1.1 Time commands, time utilities, and time routines

9.2 Tuning applications using only the compiler

9.2.1 Compiler brief overview

9.2.2 Most commonly used flags

9.2.3 Compiler directives for performance

9.2.4 POWER5 compiler features

9.3 Profiling applications

9.3.1 Hardware performance monitor

9.3.2 Profiling utilities

9.4 Memory management

9.5 Optimization of critical sections in the code

9.5.1 General rules for optimization strategies

9.5.2 Array optimization

9.5.3 Loop optimization

9.6 Optimized libraries

9.6.1 MASS Library

9.6.2 ESSL library

9.7 Parallel programming general concepts

Chapter 10. Partition Load Manager

10.1 When and how should I use Partition Load Manager?

10.1.1 Partition Load Manager and other load-balancing tools

10.1.2 When to use Partition Load Manager

10.1.3 How to deploy Partition Load Manager.

10.2 More about Partition Load Manager installation and setup

10.2.1 Overview of Partition Load Manager behavior

10.2.2 Management versus monitoring modes

10.2.3 Configuration file and tunables

10.3 Managing and monitoring with Partition Load Manager

10.3.1 Managing multiple partitions

10.3.2 Extra tips about the xlplm command

10.3.3 Examples of Partition Load Manager commands output

10.4 Partition Load Manager performance impact

10.4.1 Partition Load Manager resource requirements

10.4.2 Partition Load Manager impact on managed partitions

Related publications

IBM Redbooks

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Online resources

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Index

Back cover.

Notes:

Includes index.

OCLC:

80245352