IBM Power7+ Manuals

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IBM Power7+ Optimization And Tuning Manual

IBM Power7+ Optimization And Tuning Manual (224 pages)

Brand: IBM | Category: Computer Hardware | Size: 3.03 MB

Table of Contents

Front Cover
1
Table of Contents
5
Notices

9
- Trademarks
  10
Preface

11
Chapter 1. Optimization and Tuning on IBM POWER7 and IBM POWER7

17
Chapter 2. The POWER7 Processor

37
Chapter 3. The POWER Hypervisor

71
Chapter 4. AIX

83
- AIX and System Libraries
  84
  - AIX Operating System-Specific Optimizations
    84
  - Using POWER7+ Features under AIX
    99
- AIX Active System Optimizer and Dynamic System Optimizer
  100
  - Concepts
    100
  - ASO and DSO Optimizations
    102
  - Workloads
    103
  - The Asoo Command
    105
  - Environment Variables
    105
  - System Requirements
    106
  - Installing DSO
    107
  - Log Files
    107
- AIX Preferred Practices
  108
- Related Publications
  110
Chapter 5. Linux

113
- Linux and System Libraries
  114
  - Introduction
    114
  - Linux Operating System-Specific Optimizations
    114
- Related Publications
  122
Chapter 6. Compilers and Optimization Tools for C, C++, and Fortran

123
- Compiler Versions and Optimization Levels
  124
- Advanced Compiler Optimization Techniques
  125
  - Common Prerequisites
    125
  - XL Compiler Family
    126
  - GCC Compiler Family
    128
- IBM Feedback Directed Program Restructuring
  130
  - Introduction
    130
  - FDPR Supported Environments
    131
  - Acceptable Input Formats
    132
  - General Operation
    132
  - Instrumentation and Profiling
    133
  - Optimization
    135
- Related Publications
  139
Chapter 7. Java

141
- Java Levels
  142
- 32-Bit Versus 64-Bit Java
  142
- Memory and Page Size Considerations
  143
  - Medium and Large Pages for Java Heap and Code Cache
    143
  - Configuring Large Pages for Java Heap and Code Cache
    144
  - Prefetching
    144
  - Compressed References
    144
  - JIT Code Cache
    145
  - Shared Classes
    146
- Java Garbage Collection Tuning
  146
  - GC Strategy: Optthruput
    146
  - GC Strategy: Optavgpause
    147
  - GC Strategy: Gencon
    147
  - GC Strategy: Balanced
    147
  - Optimal Heap Size
    148
- Application Scaling
  149
  - Choosing the Correct SMT Mode
    149
  - Using Resource Sets
    149
  - Java Lock Reservation
    151
  - Java GC Threads
    151
  - Java Concurrent Marking
    152
- Related Publications
  152
Chapter 8. DB2

153
- DB2 and the POWER7 Processor
  154
- Taking Advantage of the POWER7 Processor
  154
  - Affinitization
    154
  - Page Sizes
    155
  - Decimal Arithmetics
    155
  - Using SMT Priorities for Internal Lock Implementation
    156
- Capitalizing on the Compilers and Optimization Tools for POWER7
  156
  - Whole-Program Analysis and Profile-Based Optimizations
    156
  - Feedback Directed Program Restructuring (FDPR)
    156
- Capitalizing on POWER7 Virtualization
  156
  - DB2 Virtualization
    157
  - DB2 in an AIX Workload Partition
    157
- Capitalizing on the AIX System Libraries
  158
  - Using the Thread_Post_Many API
    158
  - File Systems
    158
- Capitalizing on Performance Tooling
  159
  - High-Level Investigation
    159
  - Low-Level Investigation
    160
- Conclusion
  160
- Related Publications
  160
Chapter 9. Websphere Application Server

163
- IBM Websphere
  164
  - Installation
    164
  - Deployment
    164
  - Performance
    165
  - Performance Analysis, Problem Determination, and Diagnostic Tests
    166
Appendix A. Analyzing Malloc Usage under AIX

167
- Introduction
  168
- How to Collect Malloc Usage Information
  168
Appendix B. Performance Tooling and Empirical Performance Analysis

171
- Introduction
  172
- Performance Advisors
  172
  - Expert System Advisors
    172
  - Rational Performance Advisor
    177
- Aix
  178
  - CPU Profiling
    179
  - AIX Trace-Based Analysis Tools
    181
  - Finding Emulation Issues
    186
  - Hpmstat, Hpmcount, and Tprof -E
    187
- Linux
  187
- Java (Either AIX or Linux)
  192
  - 32-Bit or 64-Bit JDK
    192
  - Java Heap Size, and Garbage Collection Policies and Parameters
    192
  - Hot Method or Routine Analysis
    193
  - Locking Analysis
    198
  - Thread State Analysis
    199
Appendix C. POWER7 Optimization and Tuning with Third-Party Applications

201

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