IBM @server pSeries Manuals

Manuals and User Guides for IBM @server pSeries. We have 1 IBM @server pSeries manual available for free PDF download: Tuning Manual

IBM @server pSeries Tuning Manual

IBM @server pSeries Tuning Manual (32 pages)

high performance switch Tuning and Debug Guide

Brand: IBM | Category: Switch | Size: 0.15 MB

Table of Contents

Table of Contents
2
1 Introduction

4
2 Tunables and Settings for Switch Software

5
3 Tunables and Settings for AIX 5L

9
- IP Tunables
  9
- File Cache
  9
- Svmon and Vmstat Commands
  10
  - Svmon
    11
  - Vmstat
    12
- Large
  13
- Large Pages and IP Support
  15
- Memory Affinity for a Single LPAR
  15
- Amount of Memory Available
  15
- Debug Settings in the AIX 5L Kernel
  16
4 Daemon Configuration

16
5 Debug Settings and Data Collection Tools

19
- Lsattr Tuning
  19
  - Driver_Debug Setting
    19
  - Ip_Trc_Lvl Setting
    19
- Cpus and Frequency
  19
- Affinity Lpars
  20
- Small Real Mode Address Region on HMC GUI
  20
- Deconfigured L3 Cache
  20
- Service Focal Point
  20
- Errpt Command
  21
- HMC Error Logging
  21
- Multiple Versions of MPI Libraries
  21
- Mp_Printenv
  22
- Mp_Statistics
  23
- Dropped Switch Packets
  24
- Mp_Infolevel
  28
- Lapi_Debug_Comm_Timeout
  29
- Lapi_Debug_Perf
  29
- AIX 5L Trace for Daemon Activity
  30
6 Conclusions and Summary

30
7 Additional Reading

30
- HPS Documentation
  30
- MPI Documentation
  31
- AIX 5L Performance Guides
  31
- IBM Redbooks
  31
- Power4
  31

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