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- Outdated ipath_ether Configuration Setup Generates Error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
D-18 IB6054601-00 H
S
The shell strips off the double quotes before handing the arguments to the mpicc
script, thus causing the problem. The workaround is to escape the double quotes
and white space by using backslashes, so that the shell does not process them.
(Also note the single quote (‘) around the -D, since the scripts do an eval rather
than directly invoking the underlying compiler.) Use this command instead:
$ mpicc -show -DMYDEFINE=\"some\ value\" test.c
gcc -c ‘-DMYDEFINE="some value"‘ test.c
gcc -Wl,--export-dynamic,--allow-shlib-undefined test.o -lmpich
Run Time Errors with Different MPI Implementations
It is now possible to run different implementations of MPI, such as HP-MPI, over
InfiniPath. Many of these implementations share command (such as mpirun) and
library names, so it is important to distinguish which MPI version is in use. This is
done primarily through careful programming practices.
Examples are provided in the following paragraphs.
In the following command, the HP-MPI version of mpirun is invoked by the full
path name. However, the program mpi_nxnlatbw was compiled with the QLogic
version of mpicc. The mismatch produces errors similar this:
$ /opt/hpmpi/bin/mpirun -hostlist "bbb-01,bbb-02,bbb-03,bbb-04"
-np 4 /usr/bin/mpi_nxnlatbw
bbb-02: Not running from mpirun?.
MPI Application rank 1 exited before MPI_Init() with status 1
bbb-03: Not running from mpirun?.
MPI Application rank 2 exited before MPI_Init() with status 1
bbb-01: Not running from mpirun?.
bbb-04: Not running from mpirun?.
MPI Application rank 3 exited before MPI_Init() with status 1
MPI Application rank 0 exited before MPI_Init() with status 1