             Open Fabrics Enterprise Distribution (OFED)
          OSU MPI MVAPICH-0.9.9, in OFED 1.2 Release Notes

                          June 2007


===============================================================================
Table of Contents
===============================================================================
1. Overview
2. Software Dependencies
3. New Features
4. Bug Fixes
5. Known Issues
6. Main Verification Flows


===============================================================================
1. Overview
===============================================================================
These are the release notes for OSU MPI MVAPICH-0.9.9.
OSU MPI is an MPI channel implementation over InfiniBand 
by Ohio State University (OSU).

See http://nowlab.cse.ohio-state.edu/projects/mpi-iba/.


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2. Software Dependencies
===============================================================================
OSU MPI depends on the installation of the OFED stack with OpenSM running.
The MPI module also requires an established network interface (either
InfiniBand IPoIB or Ethernet).


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3. New Features ( Compared to mvapich 0.9.7-mlnx2.2.0 )
===============================================================================
This version for OFED has the following additional features:
- Improved message coalescing
  * Reduction of per QP send queues for reduction in memory requirement
  * Significant increase in small message messaging rate
- Multi-core optimizations
  * Optimized scalable shared memory design 
  * Optimized, high-performance shared-memory-aware collective operations
  * Multi-port support for enabling user processes to bind to different IB ports
    for balanced communication performance
- On-demand connection management using native IB UD support
- Multi-path support for hot-spot avoidance in large scale clusters
- Memory Hook Support provided by integration with ptmalloc2 library


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4. Bug Fixes
===============================================================================
- Error report fixes
- PKEY support fix


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5. Known Issues
===============================================================================
- A process running MPI cannot fork after MPI_Init. Using fork might cause a
  segmentation fault.
- Using mpirun with ssh has a signal collection problem. Killing the run
  (using CTRL-C) might leave some of the processes running on some of the
  nodes. This can also happen if one of the processes exits with an error.
  Note: This problem does not exist with rsh.
- The MPD job launcher feature of the OSU MPI module has not been tested by
  Mellanox Technologies.
  See http://nowlab.cse.ohio-state.edu/projects/mpi-iba/ for more details.
- For users of Mellanox Technologies firmware fw-23108 or fw-25208 only:
  OSU MPI might fail in its default configuration if your HCA is burnt with an
  fw-23108 version that is earlier than 3.4.000, or with an fw-25208 version
  4.7.400 or earlier.
  Workaround:
  Option 1 - Update the firmware
  Option 2 - In mvapich.conf, set VIADEV_SRQ_ENABLE=0
- MVAPICH may fail to run on some SLES 10 machines due to problems in resolving
  the host name.
  Workaround: Edit /etc/hosts and comment-out/remove the line that maps 
  IP address 127.0.0.2 to the system's fully qualified hostname.


===============================================================================
5. Main Verification Flows
===============================================================================
In order to verify the correctness of OSU MPI, the following tests and
parameters were run.

Test 				Description
-------------------------------------------------------------------
Intel's 			Test suite - 1400 Intel tests
BW/LT 				OSU's test for bandwidth latency
IMB 		        	Intel's MPI Benchmark test
mpitest 			b_eff test
Presta 				Presta multicast test
Linpack 			Linpack benchmark
NAS2.3 				NAS NPB2.3 tests
SuperLU 			SuperLU benchmark (NERSC edition)
NAMD 				NAMD application
CAM 				CAM application
