Product specifications
Table Of Contents
- Table of Contents
- 1 Introduction
- 2 Feature Overview
- 3 Step-by-Step Cluster Setup and MPI Usage Checklists
- 4 InfiniPath Cluster Setup and Administration
- Introduction
- Installed Layout
- Memory Footprint
- BIOS Settings
- InfiniPath and OpenFabrics Driver Overview
- OpenFabrics Drivers and Services Configuration and Startup
- Other Configuration: Changing the MTU Size
- Managing the InfiniPath Driver
- More Information on Configuring and Loading Drivers
- Performance Settings and Management Tips
- Host Environment Setup for MPI
- Checking Cluster and Software Status
- 5 Using QLogic MPI
- Introduction
- Getting Started with MPI
- QLogic MPI Details
- Use Wrapper Scripts for Compiling and Linking
- Configuring MPI Programs for QLogic MPI
- To Use Another Compiler
- Process Allocation
- mpihosts File Details
- Using mpirun
- Console I/O in MPI Programs
- Environment for Node Programs
- Environment Variables
- Running Multiple Versions of InfiniPath or MPI
- Job Blocking in Case of Temporary InfiniBand Link Failures
- Performance Tuning
- MPD
- QLogic MPI and Hybrid MPI/OpenMP Applications
- Debugging MPI Programs
- QLogic MPI Limitations
- 6 Using Other MPIs
- A mpirun Options Summary
- B Benchmark Programs
- C Integration with a Batch Queuing System
- D Troubleshooting
- Using LEDs to Check the State of the Adapter
- BIOS Settings
- Kernel and Initialization Issues
- OpenFabrics and InfiniPath Issues
- Stop OpenSM Before Stopping/Restarting InfiniPath
- Manual Shutdown or Restart May Hang if NFS in Use
- Load and Configure IPoIB Before Loading SDP
- Set $IBPATH for OpenFabrics Scripts
- ifconfig Does Not Display Hardware Address Properly on RHEL4
- SDP Module Not Loading
- ibsrpdm Command Hangs when Two Host Channel Adapters are Installed but Only Unit 1 is Connected to the Switch
- Outdated ipath_ether Configuration Setup Generates Error
- System Administration Troubleshooting
- Performance Issues
- QLogic MPI Troubleshooting
- Mixed Releases of MPI RPMs
- Missing mpirun Executable
- Resolving Hostname with Multi-Homed Head Node
- Cross-Compilation Issues
- Compiler/Linker Mismatch
- Compiler Cannot Find Include, Module, or Library Files
- Problem with Shell Special Characters and Wrapper Scripts
- Run Time Errors with Different MPI Implementations
- Process Limitation with ssh
- Number of Processes Exceeds ulimit for Number of Open Files
- Using MPI.mod Files
- Extending MPI Modules
- Lock Enough Memory on Nodes When Using a Batch Queuing System
- Error Creating Shared Memory Object
- gdb Gets SIG32 Signal Under mpirun -debug with the PSM Receive Progress Thread Enabled
- General Error Messages
- Error Messages Generated by mpirun
- MPI Stats
- E Write Combining
- F Useful Programs and Files
- G Recommended Reading
- Glossary
- Index

xvi IB6054601-00 H
QLogic Host Channel Adapter and QLogic OFED Software Users Guide
QLogic OFED Version 1.4
S
Other Configuration: Changing the MTU Size . . . . . . . . . . . . . . . . . . . . . . . 4-18
Managing the InfiniPath Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Configure the Infinipath Driver State . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Start, Stop, or Restart InfiniPath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Unload the Driver/Modules Manually. . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
InfiniPath Driver Filesystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
More Information on Configuring and Loading Drivers. . . . . . . . . . . . . . . . . 4-21
Performance Settings and Management Tips . . . . . . . . . . . . . . . . . . . . . . . 4-22
Homogeneous Nodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Adapter and Other Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Remove Unneeded Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Disable Powersaving Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
Hyper-Threading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
Host Environment Setup for MPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Configuring for ssh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Configuring ssh and sshd Using shosts.equiv . . . . . . . . . . 4-25
Configuring for ssh Using ssh-agent . . . . . . . . . . . . . . . . . . . 4-27
Process Limitation with ssh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
Checking Cluster and Software Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
ipath_control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
ibstatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
ibv_devinfo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
ipath_checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
The Intel Cluster Checker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
5 Using QLogic MPI
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
QLogic MPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
PSM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Other MPIs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Linux File I/O in MPI Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
MPI-IO with ROMIO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Getting Started with MPI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Copy Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Create the mpihosts File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Compile and Run an Example C Program . . . . . . . . . . . . . . . . . . . . . 5-3
Examples Using Other Programming Languages . . . . . . . . . . . . . . . . 5-4
QLogic MPI Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Use Wrapper Scripts for Compiling and Linking . . . . . . . . . . . . . . . . . 5-6
Configuring MPI Programs for QLogic MPI . . . . . . . . . . . . . . . . . . . . . 5-7