Berkeley UPC 2.6.0 and GASNet 1.10.0 released!

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We are pleased to announce the release of Berkeley UPC 2.6.0, which is now
available at:

     http://upc.lbl.gov/download/

Source is available for all supported platforms.  Binary distributions are
available for OS X and Windows/Cygwin. As usual, CD's containing the release 
will be freely available at the PGAS booth at SuperComputing 07 this week.

The 2.6.0 release contains numerous improvements over our last release,
including:

  - Multiconf build manager is now enabled by default, providing easy access
      to multiple UPCR configs (eg debug and opt) from the upcc command line
  - lapi-conduit now uses RDMA support on LAPI/Federation systems,
      when available, to improve communication performance
  - Data movement collectives now use a scalable, high-performance 
implementation
  - Add upcc -extern-main flag for programs with main() in non-UPC code
  - Suppress harmless warnings caused by a gcc 4.2 optimizer bug
  - Document workarounds for a gcc 4.x optimizer bug that can affect the
    correctness of shared-local accesses in rare cases.
  - Upgrade portals network support to be fully native
  - Add pthreads support on compute-node Linux
  - Value collectives v1.2: minor usability upgrades
  - Fully inline local put/get operations for GCCUPC+UPCR
  - GCCUPC+UPCR now requires GCCUPC v4.x or newer
  - Add native support for OpenIB networks via new 'ibv' network
  - Port the runtime to: CrayXT/Linux, SunC/Linux, OpenBSD/x86
  - Fix a bug with handling of multiple trans_extra files
  - Add upcrun options for backtracing and freezing
  - Add upcrun options for argument and environment encoding for buggy 
spawners
  - Add new test harness options to select groups of tests based on filters
  - Add a valgrind warning suppression file: gasnet.supp
  - Fix bug 1853: compiler mismatch warnings for GCC/UPC
  - Numerous misc fixes: see http://upc-bugs.lbl.gov for details

Bundled with this release is the new 1.10.0 release of the GASNet 
communication system, which is also available for separate download at:

             http://gasnet.cs.berkeley.edu/

Below are the notable changes at the GASNet level since the last public 
release:

* New conduits added:
   - ibv-conduit: High-performance conduit using the OpenIB communication
     interface on InfiniBand hardware.

* New platform support:
   - New ports: CrayXT/Linux, K42/PPC64, OpenBSD/x86, SunC/Linux

* IBM SP/LAPI:
   - Upgraded lapi-conduit to use RDMA support on LAPI/Federation systems,
     when available. This provides improved communication performance.

* CrayXT/Portals:
   - portals-conduit is now a fully-native implementation, no longer relies
     on any MPI calls
   - portals-conduit now works with PrgEnv-PGI, starting with Cray PE 1.5
   - support has been added for compute-node Linux
   - support has been added for pthreads on compute-node Linux
   - fixes to automatically workaround known problems in various PE versions
   - removed the 100 MB limit for SEGMENT_FAST on CNL
   - workaround a thread-safety bug in CNL Portals that could result in
     crashes for AM-heavy workloads

* Myrinet/GM:
   - Fix a race that could result in lost payload data for heavy AM Long
     communication in the presence of multiple client threads.

* InfiniBand/{VAPI,IBV}:
   - New AM-over-RDMA optimization significantly improves performance of small 
AMs
   - Expose env vars to manipulate hardware-level retransmission parameters.

* Ethernet/UDP:
   - now supports up to 16K nodes (although buffer utilization remains 
non-scalable)
   - fix an exit race that could cause some trailing output to be lost

* Collectives:
   - Added an initial high-performance implementation of the GASNet
     collectives. This provides scalable implementations of all the
     data movement collectives, implemented over Active Messages.

* Misc changes:
   - Improved checking for randomized Linux VM spaces, which inhibit
     the ability to provide GASNET_ALIGNED_SEGMENTS
   - Add node placement support for various job spawners
   - Fix a crash in gasnett_threadkey for C++ clients
   - Add backtrace extensibility to GASNet tools
   - Add new features GASNET_FREEZE_SIGNAL and GASNET_BACKTRACE_SIGNAL
     which allow a user to asynchronously freeze a process or print a 
backtrace
   - Many, many bug fixes, for both specific conduits and general platform
     portability. See http://upc-bugs.lbl.gov for complete details.    

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