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- Outdated ipath_ether Configuration Setup Generates Error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
IB6054601-00 H F-11
A
ipath_pkt_test
This program is installed from the infinipath RPM. Use ipath_pkt_test to
do one of the following:
Test the InfiniBand link and bandwidth between two InfiniPath host channel
adapters.
Using an InfiniBand loopback connector, test the link and bandwidth within a
single InfiniPath host channel adapter.
The ipath_pkt_test program runs in either ping-pong mode (send a packet,
wait for a reply, repeat) or in stream mode (send packets as quickly as possible,
receive responses as they come back).
Upon completion, the sending side prints statistics on the packet bandwidth,
showing both the payload bandwidth and the total bandwidth (including InfiniBand
and InfiniPath headers). See the man page for more information.
ipathstats
The ipathstats program is useful for diagnosing InfiniPath problems,
particularly those that are performance related. It is installed from the
infinipath RPM. It displays both driver statistics and hardware counters,
including both performance and "error" (including status) counters.
Running ipathstats -c 10, for example, displays the number of packets and
32-bit words of data being transferred on a node in each 10-second interval. This
output may show differences in traffic patterns on different nodes, or at different
stages of execution. See the man page for more information.
lsmod
When you need to find which InfiniPath and OpenFabrics modules are running,
type the following command:
# lsmod | egrep ’ipath_|ib_|rdma_|findex’
modprobe
Use this program to load/unload the drivers. You can check to see if the driver has
loaded by using this command:
# modprobe -v ib_ipath
The -v option typically only prints messages if there are problems.
The configuration file that modprobe uses is /etc/modprobe.conf
(/etc/modprobe.conf.local on SLES). In this file, various options and
naming aliases can be set.