Mellanox Technologies
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=   Mellanox ScalableSHMEM Release Notes                    =
=   Version 2.2                                             =
=   Last Modified on December 23, 2012                      =
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Contents
========
1. Overview
2. Changes in This Release
3. Supported Platforms and Operating Systems
4. Known Issues

===============================================================================
1. Overview
===============================================================================
These are the release notes for the Mellanox ScalableSHMEM 2.2
The ScalableSHMEM programming library is a one-side communications library that
supports a unique set of parallel programming features including point-to-point 
and collective routines, synchronizations,
atomic operations, and a shared memory paradigm used between the processes of
a parallel programming application.

===============================================================================
2. Changes in This Release
===============================================================================
Mellanox ScalableSHMEM v2.2 provides the following changes and new features:

Mellanox ScalableSHMEM v2.2 Main Changes (from v2.1):
-------------------------------------------------------------------------------
 - Added Sandy Bridge performance optimizations
 - Allocated memheap using contiguous memory provided by the HCA
 - Replaced the buddy memheap by the ptmalloc allocator
 - Added the option of using multiple pSync arrays instead of 
   barrier synchronization between collective routines 
   (fcollect, reduction routines)
 - spml yoda: Optimized small size puts
 - Performance optimization and bug fixes
 - Added memory footprint optimizations


===============================================================================
3. Supported Platforms and Operating Systems
===============================================================================
The following is the list of supported patforms and OSes:

 - Supported platforms:
   - MLNX_OFED: 1.8.5 or later

 Note: The following packages must be installed separately on all cluster nodes: 
	   Mellanox MXM, Mellanox FCA

 - x86_64 Linux Operating Systems:
   - RHEL6.2

=============================================================================== 
4. Known Issues
===============================================================================
 - Working with multiple HCAs when running with RC qps (-mca spml yoda) 
   is currently not supported.  When SHMEM is in RC mode, only the first active 
   port is used for data traffic.