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- Outdated ipath_ether Configuration Setup Generates Error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
A–mpirun Options Summary
Tuning Options
IB6054601-00 H A-5
A
-statsfile file-prefix
This option specifies an alternate file to receive the output from the
-print-stats option.
Default: stderr
-statsmode absolute|diffs
When printing process statistics with the -print-stats option, this option
specifies if the printed statistics have the absolute values of the QLogic adapter
chip counters and registers or if there are differences between those values at the
start and end of the process.
Default mode: diffs
Tuning Options
-L, -long-len length
This option determines the length of the message used by the rendezvous
protocol. The InfiniPath rendezvous messaging protocol uses two-way handshake
(with MPI synchronous send semantics) and receive-side DMA.
Default: 64000
-N, -num-send-bufs buffer-count
QLogic MPI uses the specified number as the number of packets that can be sent
without having to wait from an acknowledgement from the receiver. Each packet
contains approximately 2048 bytes of user data.
Default: 512
-s,-long-len-shmem length
This option specifies the length of the message used by the rendezvous protocol
for intra-node communications. The InfiniPath rendezvous messaging protocol
uses two-way handshake (with MPI synchronous send semantics) and
receive-side DMA.
Default: 16000
-W, -rndv-window-size length
When sending a large message using the rendezvous protocol, QLogic MPI splits
the message into a number of fragments at the source and recombines them at
the destination. Each fragment is sent as a single rendezvous stage. This option
specifies the maximum length of each fragment.
Default: 262144 bytes