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- Outdated ipath_ether Configuration Setup Generates Error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
D–Troubleshooting
QLogic MPI Troubleshooting
IB6054601-00 H D-13
A
Mixed Releases of MPI RPMs
Make sure that all of the MPI RPMs are from the same release. When using
mpirun, an error message will occur if different components of the MPI RPMs are
from different releases. In the following example, mpirun from release 2.1 is
being used with a 2.2 library.
$ mpirun -np 2 -m ~/tmp/x2 osu_latency
MPI_runscript-xqa-14.0: ssh -x> Cannot detect InfiniPath
interconnect.
MPI_runscript-xqa-14.0: ssh -x> Seek help on loading InfiniPath
interconnect driver.
MPI_runscript-xqa-15.1: ssh -x> Cannot detect InfiniPath
interconnect.
MPI_runscript-xqa-15.1: ssh -x> Seek help on loading InfiniPath
interconnect driver.
MPIRUN: Node program(s) exitted during connection setup
$ mpirun -v
MPIRUN:Infinipath Release2.3: Built on Wed Nov 6 17:28:58 PDT 2008
by mee
The following example is the error that occurs when mpirun from the 2.2 release
is being used with the 2.1 libraries.
$ mpirun-ipath-ssh -np 2 -ppn 1 -m ~/tmp/idev osu_latency
MPIRUN: mpirun from the 2.3 software distribution requires all
node processes to be running 2.3 software. At least node <nodename>
uses non-2.3 MPI libraries
The following string means that either an incompatible non-QLogic mpirun binary
has been found or that the binary is from an InfiniPath release prior to 2.3.
Found incompatible non-InfiniPath or pre-2.3
InfiniPath mpirun-ipath-ssh (exec=/usr/bin/mpirun-ipath-ssh)
Missing mpirun Executable
When the mpirun executable is missing, the following error appears:
Please install mpirun on <nodename> or provide a path to
mpirun-ipath-ssh
(not found in $MPICH_ROOT/bin, $PATH
or path/to/mpirun-ipath-ssh/on/the/head/node) or run with
mpirun -distributed=off
This error string means that an mpirun executable (mpirun-ipath-ssh) was
not found on the computation nodes. Make sure that the mpi-frontend-* RPM
is installed on all nodes that will use mpirun.