From knarf@cct.lsu.edu Tue Oct 25 15:42:49 2011
From: knarf@cct.lsu.edu
To: commits@lists.einsteintoolkit.org
Subject: [Commits] [svn:einsteintoolkit] www/about/releases/ (Rev. 735)
Date: Tue, 25 Oct 2011 20:42:49 +0000
Message-ID: <20111025204249.64E2A2C4A39@mail.einsteintoolkit.org>
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User: knarf
Date: 2011/10/25 03:42 PM

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+<?php $title=3D'Release Announcement';
+include_once($_SERVER['DOCUMENT_ROOT'].'/global/header.php');?>
+
+<p>We are pleased to announce the forth release (code name "<a href=3D"http:=
//en.wikipedia.org/wiki/James_Clerk_Maxwell">Maxwell</a>") of the Einstein To=
olkit, an open, community developed software infrastructure for relativistic =
astrophysics. This release includes substantial changes to the underlying AMR=
 infrastructure Carpet and the simfactory tool. GRHydro is now officially rel=
eased with support for magnetohydrodynamics. In addition, bug fixes accumulat=
ed since the previous release in April 2011 have been included.</p>
+
+<p>The Einstein Toolkit is a collection of software components and tools for=
 simulating and analyzing general relativistic astrophysical systems that bui=
lds on numerous software efforts in the numerical relativity community includ=
ing CactusEinstein, the Carpet AMR infrastructure and the relativistic hydrod=
ynamics code GRHydro (an updated and extended version of the public release o=
f the Whisky code). The Cactus Framework is used as the underlying computatio=
nal infrastructure providing large-scale parallelization, general computation=
al components, and a model for collaborative, portable code development. The =
toolkit includes modules to build complete codes for simulating black hole sp=
acetimes as well as systems governed by relativistic hydrodynamics.</p>
+
+<p>The Einstein Toolkit uses a distributed software model and its different =
modules are developed, distributed, and supported either by the core team of =
Einstein Toolkit Maintainers, or by individual groups. Where modules are prov=
ided by external groups, the Einstein Toolkit Maintainers provide quality con=
trol for modules for inclusion in the toolkit and help coordinate support. Th=
e Einstein Toolkit Maintainers currently involve postdocs and faculty from fi=
ve different institutions, and host weekly meetings that are open for anyone =
to join in.</p>
+
+<p>Guiding principles for the design and implementation of the toolkit inclu=
de: open, community-driven software development; well thought out and stable =
interfaces; separation of physics software from computational science infrast=
ructure; provision of complete working production code; training and educatio=
n for a new generation of researchers.</p>
+
+<p>For more information about using or contributing to the Einstein Toolkit,=
 or to join the Einstein Toolkit Consortium, please visit our web pages at &l=
t;<a href=3D"http://einsteintoolkit.org">http://einsteintoolkit.org</a>&gt;.<=
/p>
+
+<p>The Einstein Toolkit is primarily supported by NSF 0903973/0903782/090401=
5 (CIGR), and also by NSF 0701566/0855892 (XiRel), 0721915 (Alpaca), 0905046/=
0941653 (PetaCactus) and 0710874 (LONI Grid).</p>
+
+<p>The Einstein Toolkit thorns contain over 130 regression test cases. On a =
large portion of the tested machines, all of these testsuites <a href=3D"http=
://einsteintoolkit.org/release-info/parse_testsuite_results.php">pass</a>, us=
ing both MPI and OpenMP.</p>
+
+<p>The changes between this and the previous release include:</p>
+<ul>
+ <li> Einstein Toolkit: All test cases pass on almost all of the tested twen=
ty production and development machines.
+ <li> Carpet
+  <ul>
+   <li> Significant internal development
+   <li> Grid structure is handled in a more efficient manner, leading to imp=
roved parallel scalability
+   <li> Grid structure output now supports multipatch
+   <li> Improvements to OpenMP parallelism in Carpet
+   <li> Support for cell-centering
+   <li> Timers are now hierarchical - use parameter output_timer_tree_every =
to output the timer tree to standard output.  This makes it much easier to se=
e where the time is spent in a simulation
+   <li> A backtrace file is now written to the output directory when the sim=
ulation code crashes.  Note that you probably need to add the -rdynamic optio=
n to CFLAGS and CXXFLAGS for the backtrace symbols to be interpreted correctl=
y.
+  </ul>
+ <li> CarpetIOHDF5: There are now parameters which select whether symmetry, =
boundary and buffer points are output for sliced output. =20
+ <li> CarpetRegrid2: Now supports "true" AMR based on a regridding criterion
+ <li> SimFactory
+  <ul>
+   <li> Completely new rewrite, new repository.
+   <li> Machine database and optionlists updated due to system changes on HP=
C resources
+   <li> Can now run the Cactus test suites as part of a job in a queuing sys=
tem
+   <li> TODO: List of new machines supported by SimFactory?
+   <li> Optionlists now enable instruction vectorisation by default - this a=
ffects those thorns that explicitly use this vectorisation, including McLachl=
an and Carpet
+   <li> Now supports parameter file scripts <name>.rpar - these should be sc=
ripts which write a parameter file to <name>.par.  This is useful for perform=
ing simple calculations on parameters in python or perl
+   <li> Now uses the Intel compiler by default on Kraken and Hopper
+  </ul>
+ <li> Cactus
+  <ul>
+   <li> CUDA support added for GPU computing
+   <li> Parameters can now be used in STORAGE specifications in schedule.ccl=
 files
+   <li> Multi-line parameter values can now contain comments - this makes it=
 easier to comment out entries
+   <li> Mac OS 10.7 (Lion) is now supported
+   <li> CCTK_GFINDEX3D now checks index against array bounds when CCTK_DEBUG=
 is defined
+   <li> Standard output of Cactus build process is now much more compact
+  </ul>
+ <li> McLachlan
+  <ul>
+   <li> Performance improvements
+   <li> BSSN has instruction vectorisation enabled by default for improved s=
peed
+  </ul>
+ <li> GRHydro
+  <ul>
+   <li> Support for MHD was added, but is by default disabled.
+  </ul>
+ <li> WeylScal4: OpenMP support enabled in WeylScal4
+ <li> TimerReport: "top timers" now given as min/max/mean across all process=
es instead of just from the root process
+ <li> ADMBase
+  <ul>
+   <li> Variables now have flat boundary condition applied
+   <li> Default value of ADMBase::initial_shift is now zero rather than none
+  </ul>
+ <li> TwoPunctures: Now outputs a BBH metadata file, as used by NINJA / NRAR=
 projects
+ <li> Vectors: New thorn which supports instruction vectorization to improve=
 performance of codes that use it
+ <li> Cauchy Characteristic Extraction and the PITT Null Code are now includ=
ed.
+  <ul>
+   <li> The Pitt code implements a robust fully nonlinear characteristic evo=
lution scheme for the Einstein equations for asymptotically flat spacetimes.
+   <li> Included in the code is the gauge invariant calculation of the Bondi=
 News function at future null infinity.
+   <li> Include in the code are thorns that implement Cauchy Characteristic =
extraction, where Cauchy evolutions (McLachlan) provide  boundary data for a =
characteristic evolution. This allows for the unambiguous calculation of the =
gravitational waveform from merging BBH spacetimes.
+  </ul>
+ <li> FFTW3 library has been added to the ET
+ <li> Kranc
+  <ul>
+   <li> thorns can now be generated including a Jacobian transformation of a=
ll derivatives - this means they can be used with multi-patch
+   <li> improvements to instruction vectorization=20
+   <li> can now perform finite differences using either function calls or ma=
cros; control using VECTORISE_INLINE =3D yes/no in optionlist; using function=
s can make the code fit in the instruction cache where it didn't before, resu=
lting in large speed increases, using macros can cause compilers to run out o=
f memory for complicated codes
+   <li> Generated thorns now check that there are sufficient ghost and bound=
ary points for the finite differencing stencil used
+   <li> error detection has been improved
+  </ul>
+</ul>
+</p>
+
+<p>All repositories participating in this release carry a branch
+<tt>ET_2011_10</tt> marking this release.  These release branches will
+be updated if severe errors are found.</p>
+
+<p>This release has been tested on about twenty systems and
+architectures, including the following:</p>
+
+<ul>
+<li>Workstations (AMD, Linux)</li>
+<li>MacBook Pro notebook (Intel, Mac OS X)</li>
+<li>Lenovo T61p notebook (Intel, Linux)</li>
+<li><a href=3D"http://supercomputers.aei.mpg.de/">Datura</a>, AEI (cluster, =
Linux)</li>
+<li><a href=3D"http://www.nics.tennessee.edu/computing-resources/kraken">Kra=
ken</a>, NICS (Cray XT5, Linux)</li>
+<li><a href=3D"http://www.hpc.lsu.edu/systems/system.php?system=3DPhilip">Ph=
ilip</a>, LSU (Intel cluster, Linux)</li>
+<li><a href=3D"http://www.loni.org/systems/system.php?system=3DQueenBee">Que=
en Bee</a>, LONI (Intel cluster, Linux)</li>
+<li><a href=3D"http://services.tacc.utexas.edu/index.php/ranger-user-guide">=
Ranger</a>, TACC (AMD cluster, Linux)</li>
+<li><a href=3D"http://services.tacc.utexas.edu/index.php/lonestar-user-guide=
">Lonestar</a>, TACC (Intel cluster, Linux)</li>
+<li><a href=3D"http://www.sdsc.edu/us/resources/trestles/">Trestles</a>, SDS=
C (AMD cluster, Linux)</li>
+<li><a href=3D"http://www.nersc.gov/users/getting-started/">Hopper</a>, NERS=
C (Cray XE6, Linux)</li>
+<li><a href=3D"https://www.sharcnet.ca/my/systems/show/73">Orca</a>, Sharcne=
t (AMD cluster, Linux)</li>
+</ul>
+
+<p>The <a href=3D"http://www.simfactory.org/">Simulation
+Factory</a> contains ready-to-use configuration details for more than
+40 additional systems, including most HPC systems
+at <a href=3D"http://www.loni.org/">LONI</a>,
+<a href=3D"http://www.nersc.gov/">NERSC</a>,
+<a href=3D"http://www.rzg.mpg.de/">RZG</a>,
+and <a href=3D"https://www.xsede.org/">XSEDE (TeraGrid)</a>.</p>
+
+<p>The Einstein Toolkit web site contains online documentation for its
+thorns, and pointers for using it to build your own code.  There is
+also a tutorial that explains how to download, build, and run the code
+for a simple binary black hole evolution.  We invite you to join our
+mailing list
+&lt;<a href=3D"../community">users(a)einsteintoolkit.org</a>&gt;.</p>
+
+<p>On behalf of the Einstein Toolkit Consortium: the "Maxwell" Release Team<=
/p>
+
+<p>
+&nbsp;&nbsp;&nbsp;Eloisa Bentivegna<br />
+&nbsp;&nbsp;&nbsp;Tanja Bode<br />
+&nbsp;&nbsp;&nbsp;Peter Diener<br />
+&nbsp;&nbsp;&nbsp;Roland Haas<br />
+&nbsp;&nbsp;&nbsp;Ian Hinder<br />
+&nbsp;&nbsp;&nbsp;Frank L&ouml;ffler<br />
+&nbsp;&nbsp;&nbsp;Bruno Mundim<br />
+&nbsp;&nbsp;&nbsp;Christian D. Ott<br />
+&nbsp;&nbsp;&nbsp;Erik Schnetter<br />
+&nbsp;&nbsp;&nbsp;Eric Seidel<br />
+</p>
+
+<p>April 21, 2011</p>
+=09
+<?php include_once($_SERVER['DOCUMENT_ROOT'].'/global/footer.php');?>


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