The following software/libraries have been updated on hexagon. Users are encouraged to recompile their programs to gain any performance and stability benefits.

MPI
xt-mpt 5.0.1 -> 5.1.0

Math-libs
xt-libsci 10.4.7 -> 10.4.8
PETSc 3.1.01 -> 3.1.02
GA 4.3.1

Compilers and wrappers
PGI 10.6.0 -> 10.8.0
GCC 4.5.0 -> 4.5.1
xt-asyncpe 4.2 -> 4.3

Performance tools and debuggers
xt-craypat/apprentice2 5.1.1 -> 5.1.2
MRNet 2.2.0.1 -> 3.0.0
stat 1.0.0 -> 1.1.0

NOTES:

xt-craypat
General
* more complete support for PGAS, UPC and CAF programs
pat_build
* the 'caf' and 'upc' trace groups now include tracing the 'pgas' group
* some shared objects of executable files that pat_build executed could
not be found - fixed truncation of LD_LIBRARY_PATH
* update Global Array trace wrappers
* fix tracing pthread functions using GNU PrgEnv
* fix tracing user-defined functions for GNU 4.5.0 Fortran

Bugs closed since 5.1.1 release
763880 App2/5.1.2: HW counters overview shows negative numbers
763877 App2/5.1.2: HW counters overview shows more than 100%
763439 tracing user-defined functions results in seg fault for GNU
Fortran 4.5.0
762905 No CAF specific info is provided when instrumenting a CAF code with -g caf
762904 craypat provides misleading info on PGAS codes running on XE6

MPI
The following features were added to MPT 5.1.0:

- Totalview message queue debugging is now supported on XE systems.
This feature can be enabled by setting the MPICH_MSG_QUEUE_DBG
environment variable. For more information about this feature see
the intro_mpi man page.

- SHMEM users can now get the SHMEM version displayed by setting
the SHMEM_VERSION_DISPLAY environment variable when running on
either XT or XE systems.

In addition the following features were added in MPT updates since
the MPT 5.0.0 release and are also included:

- The MPI single copy optimization feature is now enabled by default.
The feature can be disabled by using the MPICH_SMP_SINGLE_COPY_OFF
env variable. For more information about this feature see the
intro_mpi man page.

- Additional information is also now emitted with MPI tracebacks to
more easily correlate them with console messages. Also certain
memory
registration errors will now have the virtual memory maps dumped to
aid in users debugging their programs.

- Cray SHMEM users also can use the new SHMEM_BTE_THRESHOLD env
variable to adjust when SHMEM uses the Block Transfer Engine(BTE)
for off-node transfers.

Several bugs were also fixed in this release and are listed below.

Bugs fixed:
761094,760949,763512,762928 - Fix bytes_transferred field in the gni
netmod LMT RDMA write path
763677,760868 - Fix for LMT path for MPI_Issend hangs


xt-asyncpe
Bugs fixed in this release
760967 MPICH2 tests failing for -sdefault64 -dynamic calling
MPI_Initialized( flag, ierr ) - bad flag returned
761681 Cannot override PGI -tp option from xtpe-* module
763605 mpi applications using pgi and default64 fail
763724 "ftn -default64" is no longer adding "-i8 -r8" to PGI
compilations.
763787 empty parameter reference causes syntax error

xt-libsci
LibSci 10.4.8 includes bugfixes.
761427 xt-libsci/10.4.3 with dynamic libraries
763728 Remove "conflict xt-libsci-gemini" from xt-libsci modulefiles

PETSc
The PETSc 3.1.02 release contains PETSc 3.1-p4 patch set and provides
performance improvements in ATF-CASK SpMV Multiply Kernels PETSc for
AIJ format.

Bugs fixed in this release:
763445 Problem with PetscSynchronizedFlush
763494 Problem with variable definition files (PETSC_LIB_DIR is not
set in the conf/variables)

More detailed information about the official PETSc-3.1 release is
available at
http://www.mcs.anl.gov/petsc/petsc-as/documentation/changes/31.html
SuperLU-4.0 information can be found at
http://crd.lbl.gov/~xiaoye/SuperLU/#superlu

Known problem:
--------------
Missing library entry points in the PETSc complex dynamic libraries,
for non-GNU libraries only.
763837 petsc-complex will not link -dynamic

MRNet
Update to the 3.0 release of the MRNet library.

MRNet 3.0 release notes:
http://www.paradyn.org/mrnet/release_3.0/README

MRNet 3.0 Programmer's Guide:
http://www.paradyn.org/mrnet/release_3.0/mrnet_3.0.html

GA
This is the initial release of Global Arrays Library.
Global Arrays is a portable Non-Uniform Memory Access (NUMA) shared-
memory programming environment for distributed and shared memory
computers. It augments the message-passing model by providing
a shared-memory like access to distributed dense arrays.

For more information visit:
http://www.emsl.pnl.gov/docs/global/ga.html

GCC
The following bugs are fixed in the gcc 4.5.1 release.
760192 GNU gfortran OpenMP - untied task accesses threadprivate -
non-conforming but no msg [44085]
763453 seg fault in gcc 4.5.0

PGI
Features of PGI 10.8.0 are documented at:
http://www.pgroup.com/doc/pgiwsrn108.pdf
The following bugs are fixed in the PGI 10.8.0 release.
761844 internal compiler error [17079]