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- Outdated ipath_ether Configuration Setup Generates Error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
F–Useful Programs and Files
Summary and Descriptions of Useful Programs
F-6 IB6054601-00 H
S
ident
The ident strings are available in ib_ipath.ko. Running ident provides
driver information similar to the following. For QLogic RPMs, it will look like:
$ ident /lib/modules/$(uname-r)/updates/kernel/drivers/
infiniband/hw/ipath/ib_ipath.ko
/lib/modules/2.6.16.46-0.12-smp/updates/kernel/drivers/infiniband/
hw/ipath/ib_ipath.ko:
$Id: QLogic OFED Release 1.4 $
$Date: Fri Feb 27 16:14:31 PST 2009 $
$Id: QLogic OFED Release 1.4 $
$Date: Fri Feb 27 16:14:39 PST 2009 $
If the /lib/modules/$(uname -r)/updates directory is not present, then the
driver in use is the one that comes with the core kernel. In this case, either the
kernel-ib RPM is not installed or it is not configured for the current running
kernel.
If the updates directory is present, but empty except for the subdirectory
kernel, then an OFED install is probably being used, and the ident string will
be empty. For example:
$ cd /lib/modules/$(uname -r)/updates
$ ls
kernel
$ cd kernel/drivers/infiniband/hw/ipath/
lib/modules/2.6.18-8.el5/updates/kernel/drivers/infiniband/hw/ipat
h
$ ident ib_ipath.ko
ib_ipath.ko:
ident warning: no id keywords in ib_ipath.ko
ipathbug-helper
The tool ipathbug-helper is useful for verifying homogeneity. It is installed
from the infinipath RPM. Before contacting QLogic Technical Support, run this
script on the head node of your cluster and the compute nodes that you suspect
are having problems. Looking at the output often helps you find the problem. Run
ipathbug-helper on several nodes and examine the output for differences.
It is best to run ipathbug-helper with root privilege, since some of the queries
it makes require this level of privilege. There is also a --verbose parameter,
which increases the amount of gathered information.
NOTE:
ident is in the optional rcs RPM, and is not always installed.