Manuali utente per IBM pSeries

Sommario

• 1.0 Introduction

  4
• 2.0 Tunables and settings for switch software

  5
• 2.1 MPI tunables for Parallel Environment

  5
• 2.1.1 MP_EAGER_LIMIT

  5
• 2.1.2 MP_POLLING_INTERVAL and MP_RETRANSMIT_INTERVAL

  5
• 2.1.3 MP_REXMIT_BUF_SIZE and MP_REXMIT_BUF_CNT

  6
• 2.1.4 MEMORY_AFFINITY

  6
• 2.1.5 MP_TASK_AFFINITY

  7
• 2.1.6 MP_CSS_INTERRUPT

  7
• 2.2 MPI-IO

  7
• 2.3 chgsni command

  8
• 3.0 Tunables and settings for AIX 5L

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• 3.1 IP tunables

  9
• 3.2 File cache

  9
• 3.3 svmon and vmstat commands

  10
• 3.3.1 svmon

  11
• 3.3.2 vmstat

  12
• 3.4 Large page sizing

  13
• 3.5 Large pages and IP support

  15
• 3.6 Memory affinity for a single LPAR

  15
• 3.7 Amount of memory available

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• 3.8 Debug settings in the AIX 5L kernel

  16
• 4.0 Daemon configuration

  16
• 4.1 RSCT daemons

  16
• 4.2 LoadLeveler daemons

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• 4.2.1 Reducing the number of daemons running

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• 4.2.3 Reducing logging

  17
• 4.3 Settings for AIX 5L threads

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• 4.4 AIX 5L mail, spool, and sync daemons

  18
• 4.5 Placement of POE managers and LoadLeveler scheduler

  18
• 5.0 Debug settings and data collection tools

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• 5.1 lsattr tuning

  19
• 5.1.1 driver_debug setting

  19
• 5.1.2 ip_trc_lvl setting

  19
• 5.2 CPUs and frequency

  19
• 5.3 Affinity LPARs

  20
• 5.4 Small Real Mode Address Region on HMC GUI

  20
• 5.5 Deconfigured L3 cache

  20
• 5.6 Service focal point

  20
• 5.7 errpt command

  21
• 5.8 HMC error logging

  21
• 5.9 Multiple versions of MPI libraries

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• 5.10 MP_PRINTENV

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• 5.11 MP_STATISTICS

  23
• 5.12 Dropped switch packets

  24
• 5.12.2 Packets dropped in the ML0 interface

  26
• 5.12.4 Packets dropped in the switch hardware

  28
• 5.13 MP_INFOLEVEL

  28
• 5.14 LAPI_DEBUG_COMM_TIMEOUT

  29
• 5.15 LAPI_DEBUG_PERF

  29
• 5.16 AIX 5L trace for daemon activity

  30
• 6.0 Conclusions and summary

  30
• 7.0 Additional reading

  30
• 7.1 HPS documentation

  30
• 7.2 MPI documentation

  31
• 7.3 AIX 5L performance guides

  31
• 7.4 IBM Redbooks

  31
• 7.5 POWER4

  31
• flags

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