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IBM pSeries manual available for free PDF download: Tuning Manual
IBM 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
MPI Tunables for Parallel Environment
5
Mp_Eager_Limit
5
MP_POLLING_INTERVAL and MP_RETRANSMIT_INTERVAL
5
MP_REXMIT_BUF_SIZE and MP_REXMIT_BUF_CNT
6
Memory_Affinity
6
Mp_Task_Affinity
7
Mp_Css_Interrupt
7
Mpi-Io
7
Chgsni Command
8
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
RSCT Daemons
16
Loadleveler Daemons
17
Reducing the Number of Daemons Running
17
Reducing Daemon Communication and Placing Daemons on a Switch
17
Reducing Logging
17
Settings for AIX 5L Threads
18
AIX 5L Mail, Spool, and Sync Daemons
18
Placement of POE Managers and Loadleveler Scheduler
18
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
Packets Dropped Because of a Software Problem on an Endpoint
24
Packets Dropped in the ML0 Interface
26
Packets Dropped Because of a Hardware Problem on an Endpoint
27
Packets Dropped in the Switch Hardware
28
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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