[Commits] [svn:einsteintoolkit] www/about/releases/ (Rev. 735)
knarf at cct.lsu.edu
knarf at cct.lsu.edu
Tue Oct 25 15:42:49 CDT 2011
User: knarf
Date: 2011/10/25 03:42 PM
Added:
/about/releases/
ET_2011_10_announcement.php
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add new announcement text
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Directory: /about/releases/
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+<?php $title='Release Announcement';
+include_once($_SERVER['DOCUMENT_ROOT'].'/global/header.php');?>
+
+<p>We are pleased to announce the forth release (code name "<a href="http://en.wikipedia.org/wiki/James_Clerk_Maxwell">Maxwell</a>") of the Einstein Toolkit, 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 released with support for magnetohydrodynamics. In addition, bug fixes accumulated 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 builds on numerous software efforts in the numerical relativity community including CactusEinstein, the Carpet AMR infrastructure and the relativistic hydrodynamics code GRHydro (an updated and extended version of the public release of the Whisky code). The Cactus Framework is used as the underlying computational infrastructure providing large-scale parallelization, general computational components, and a model for collaborative, portable code development. The toolkit includes modules to build complete codes for simulating black hole spacetimes 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 provided by external groups, the Einstein Toolkit Maintainers provide quality control for modules for inclusion in the toolkit and help coordinate support. The Einstein Toolkit Maintainers currently involve postdocs and faculty from five 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 include: open, community-driven software development; well thought out and stable interfaces; separation of physics software from computational science infrastructure; provision of complete working production code; training and education 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 <<a href="http://einsteintoolkit.org">http://einsteintoolkit.org</a>>.</p>
+
+<p>The Einstein Toolkit is primarily supported by NSF 0903973/0903782/0904015 (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="http://einsteintoolkit.org/release-info/parse_testsuite_results.php">pass</a>, using 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 twenty production and development machines.
+ <li> Carpet
+ <ul>
+ <li> Significant internal development
+ <li> Grid structure is handled in a more efficient manner, leading to improved 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 see where the time is spent in a simulation
+ <li> A backtrace file is now written to the output directory when the simulation code crashes. Note that you probably need to add the -rdynamic option to CFLAGS and CXXFLAGS for the backtrace symbols to be interpreted correctly.
+ </ul>
+ <li> CarpetIOHDF5: There are now parameters which select whether symmetry, boundary and buffer points are output for sliced output.
+ <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 HPC resources
+ <li> Can now run the Cactus test suites as part of a job in a queuing system
+ <li> TODO: List of new machines supported by SimFactory?
+ <li> Optionlists now enable instruction vectorisation by default - this affects those thorns that explicitly use this vectorisation, including McLachlan and Carpet
+ <li> Now supports parameter file scripts <name>.rpar - these should be scripts which write a parameter file to <name>.par. This is useful for performing 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 speed
+ </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 processes 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 included.
+ <ul>
+ <li> The Pitt code implements a robust fully nonlinear characteristic evolution 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 all derivatives - this means they can be used with multi-patch
+ <li> improvements to instruction vectorization
+ <li> can now perform finite differences using either function calls or macros; control using VECTORISE_INLINE = yes/no in optionlist; using functions can make the code fit in the instruction cache where it didn't before, resulting in large speed increases, using macros can cause compilers to run out of memory for complicated codes
+ <li> Generated thorns now check that there are sufficient ghost and boundary 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="http://supercomputers.aei.mpg.de/">Datura</a>, AEI (cluster, Linux)</li>
+<li><a href="http://www.nics.tennessee.edu/computing-resources/kraken">Kraken</a>, NICS (Cray XT5, Linux)</li>
+<li><a href="http://www.hpc.lsu.edu/systems/system.php?system=Philip">Philip</a>, LSU (Intel cluster, Linux)</li>
+<li><a href="http://www.loni.org/systems/system.php?system=QueenBee">Queen Bee</a>, LONI (Intel cluster, Linux)</li>
+<li><a href="http://services.tacc.utexas.edu/index.php/ranger-user-guide">Ranger</a>, TACC (AMD cluster, Linux)</li>
+<li><a href="http://services.tacc.utexas.edu/index.php/lonestar-user-guide">Lonestar</a>, TACC (Intel cluster, Linux)</li>
+<li><a href="http://www.sdsc.edu/us/resources/trestles/">Trestles</a>, SDSC (AMD cluster, Linux)</li>
+<li><a href="http://www.nersc.gov/users/getting-started/">Hopper</a>, NERSC (Cray XE6, Linux)</li>
+<li><a href="https://www.sharcnet.ca/my/systems/show/73">Orca</a>, Sharcnet (AMD cluster, Linux)</li>
+</ul>
+
+<p>The <a href="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="http://www.loni.org/">LONI</a>,
+<a href="http://www.nersc.gov/">NERSC</a>,
+<a href="http://www.rzg.mpg.de/">RZG</a>,
+and <a href="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
+<<a href="../community">users at einsteintoolkit.org</a>>.</p>
+
+<p>On behalf of the Einstein Toolkit Consortium: the "Maxwell" Release Team</p>
+
+<p>
+ Eloisa Bentivegna<br />
+ Tanja Bode<br />
+ Peter Diener<br />
+ Roland Haas<br />
+ Ian Hinder<br />
+ Frank Löffler<br />
+ Bruno Mundim<br />
+ Christian D. Ott<br />
+ Erik Schnetter<br />
+ Eric Seidel<br />
+</p>
+
+<p>April 21, 2011</p>
+
+<?php include_once($_SERVER['DOCUMENT_ROOT'].'/global/footer.php');?>
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