From knarf@cct.lsu.edu Tue May 21 11:03:04 2013
From: knarf@cct.lsu.edu
To: commits@lists.einsteintoolkit.org
Subject: [Commits] [svn:einsteintoolkit] www/about/releases/ (Rev. 1016)
Date: Tue, 21 May 2013 16:03:03 +0000
Message-ID: <20130521160303.EBE382C5893@mail.einsteintoolkit.org>
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User: knarf
Date: 2013/05/21 11:03 AM

Added:
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Log:
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+<?php $title=3D'Release Announcement';
+include_once($_SERVER['DOCUMENT_ROOT'].'/global/header.php');?>
+
+<p>We are pleased to announce the seventh release (code name
+"<a href=3D"http://en.wikipedia.org/wiki/Carl_Friedrich_Gauss">Gauss</a>") o=
f the
+Einstein Toolkit, an open, community developed software infrastructure for
+relativistic astrophysics. This release includes various improvements to the
+MHD handling within GRHydro, and improvements to the Cactus flesh, especially
+treatment of external libraries. In addition,
+bug fixes accumulated since the previous release in November 2012 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 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
+six 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
+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
+&lt;<a href=3D"http://einsteintoolkit.org">http://einsteintoolkit.org</a>&gt=
;.</p>
+
+<p>The Einstein Toolkit is primarily supported by NSF
+1212401/1212426/1212433/1212460 (Einstein Toolkit), 0903973/0903782/0904015 =
(CIGR), and also by
+0905046/0941653 (PetaCactus) and 0710874 (LONI Grid).</p>
+
+<p>The Einstein Toolkit contains about 200 regression test cases.  On a large
+portion of the tested machines, almost all of these testsuites pass, using b=
oth
+MPI and OpenMP parallelization.</p>
+
+<h4>The changes between this and the previous release include:</h4>
+
+<p><ul><li><b>Compatibility</b></li></ul></p>
+
+The following changes lead to potential different numerical results or the n=
eed to modify optionlists:
+<ul>
+ <li> Cactus: Move MPI support from flesh to a thorn; use new MPI_DIR variab=
le to control use of MPI (see below)
+ <li> McLachlan: Correct some errors in CCZ4, in particular the GammaShift p=
arameter
+ <li> McLachlan: Change the default value of apply_dissipation to "never".
+</ul>
+
+<!-- TODO -->
+<p><ul><li><b>Changes since last release</b></li></ul></p>
+<ul>
+ <li> GetComponents:
+ <ul>
+  <li> anonymous checkout is now used by default. Use --no-anonymous for aut=
henticated checkouts
+  <li> no longer use "shallow git clones" by default
+ </ul>
+ <li> simfactory
+ <ul>
+  <li> updates of various machine configurations
+  <li> Replace large files by hard links during cleanup
+  <li> Basic configuration file for Ubuntu, Debian and Fedora operating syst=
ems.
+ </ul>
+ <li> utils: syntax highlight for vim and emacs
+ <li> Cactus flesh:
+ <ul>
+  <li> grid functions may be padded, i.e. the driver may allocate more grid =
points than requested. The allocated size of grid functions can be accessed u=
sing cctk_ash. Note however, that this can be different from cctk_lsh. The la=
tter is that part (size) of cctk_ash that is used within a simulation, i.e. t=
hat was set as simulation size via parameters. This is necessary for vectoriz=
ation where the size of arrays needs to be a multiple of some number, but the=
 simulation domain might not be.  There is no padding by default.
+  <li> correctly detect circular schedule items
+  <li> replace CCTK_RESTRICT by restrict, which is now defined by the flesh
+  <li> Change per thorn -DTHORN_IS_xxx to a per thorn -I bindings/include/xxx
+  <li> Correct error in determining dependencies
+  <li> have -reconfig target execute -cleandeps after reconfiguration
+  <li> add parameters to reverse un-enforced Cactus schedule ordering
+  <li> Move MPI support from flesh to a thorn
+  <li> Support various new Darwin minor versions
+  <li> increase default value of RELTOL to 1e-12
+  <li> Enforce that arrangement names are legal C identifiers
+  <li> Update Fortran API for CCTK_LOOP macros
+  <li> Add autoconf check whether C99 is supported (now required)
+  <li> New option -P (--exit-after-param-check) to exit after param check
+  <li> allow ${parfile} in parameter files to allow ${parfile}/subdir
+ </ul>
+ <li> Carpet
+ <ul>
+  <li> Now lives in git again
+  <li> A parameter CarpetLib::interpolate_from_buffer_zones was introduced w=
hich, in order to get the correct behaviour (not to use the buffer zones for =
interpolations), should be set to "no". However, since this changes the way t=
hings had been done in the past and this change isn't well tested yet, the de=
fault is still "yes" (as like before the parameter was introduced). The defau=
lt will very likely be changed for the next Einstein Toolkit release, after m=
ore testing.
+  <li> Added "balanced" domain decomposition
+  <li> Update setting CPU affinity
+  <li> change defaults of periodic_[xyz] to "yes" to match PUGH
+  <li> CarpetIOHDF5: add option checkpoint_every_divisor
+  <li> CarpetIOHDF5: teach the checkpointer to write index files
+  <li> CarpetIOHDF5: add support for index files to file reader
+  <li> LoopControl: Change printstats default to "no"
+  <li> CarpetInterp2: New ENO2 interpolator.
+  <li> Support more than one hierarchy of timers
+  <li> Add timers for refinement levels
+  <li> CarpetLib: Support higher-then 2nd order restriction operator for cel=
l-centered meshes for Langrange prolongated grid functions.
+ </ul>
+ <li> EinsteinExact: New arrangement, to eventually replace the Exact thorn.=
 The thorns in this arrangement are generated by Kranc
+ <li> McLachlan
+ <ul>
+  <li> Correct some errors in CCZ4, in particular the GammaShift parameter
+  <li> Change the default value of apply_dissipation to "never".
+ </ul>
+ <li> ExternalLibraries: MPI is now treated like any other library on which =
flesh and thorns may depend, such as e.g. the GSL. It is thus configured via =
thorn ExternalLibraries/MPI, and not via the flesh any more. In particular, t=
he option "MPI =3D ..." does not work any more and must not be used; instead,=
 use e.g. "MPI_DIR =3D <path>" to point to an existing installation. You may =
also say "MPI_DIR =3D BUILD" to have Cactus build OpenMPI automatically, whic=
h is a convenient way of using MPI on a system where it may not be installed.
+ <li> LocalInterp: The interpolation loop uses OpenMP
+ <li> MoL: add multirate capabilities and three new multirate rk schemes
+ <li> SphericalSurface: make maxnphi and maxntheta parameters steerable
+ <li> NaNChecker: Add options to use restriction mask to ignore unused point=
s, output more information about the failed points, use OpenMP during NaN che=
ck
+ <li> Multipole: Implement Driscoll&Healy integration
+ <li> HydroBase: schedule hydrobase_InitExcisionmask global-early loop-local
+ <li> TmunuBase: support_old_CalcTmunu_mechanism is now deprecated and is li=
kely to be removed soon
+ <li> EOS_Omni: make more parameters steerable, add option read_table_on_sin=
gle_process to have a named processor read the full table and MPI_Bcast it to=
 the other processors
+ <li> GRHydro
+ <ul>
+  <li> C2P: resort to bisection if Newton-Raphson fails. This is only activa=
ted if user requested this
+  <li> introduce parameters GRHydro_Y_e_min and GRHydro_Y_e_max to fix issue=
s with EOS tables that don't extend sufficiently far
+  <li> Fixes to atmosphere mask and the way we sync
+  <li> various fixes to ePPM
+  <li> Option to use the slow sector of multirate RK methods
+  <li> fixed issues with hot EOS treatment
+  <li> Option to reconstruct W*vel instead of vel
+  <li> use an early atmosphere reset to ensure past timelevels are initializ=
ed correctly
+  <li> various MHD fixes
+ </ul>
+ <li> Exact: openmp fixes
+ <li> GRHydro_InitData: new poloidal magnetic field routine, Added option to=
 smooth metric inside horizon, Alfven wave test
+ <li> SummationByParts: improve OpenMP parallelization
+ <li> PITTNull*: respect Cactus' IO::truncate parameter
+ <li> AEIThorns/Trigger now part of the Einstein Toolkit
+
+External libraries:
+ <li> MPI: new - use this instead of the flesh mechanism (see above)
+ <li> BLAS: update to 3.4.2
+ <li> FFTW3: update to 3.3.2
+ <li> HDF5: will likely not build fortran and C++ api for next release by de=
fault (but still does now)
+ <li> LAPACK: update to 3.4.2
+ <li> LORENE: don't use OpenMP unless it's enabled within Cactus
+ <li> OpenSSL: improve search for existing library
+ <li> zlib: update to 1.2.7
+ <li> hwloc: new thorn for libhwloc
+</ul>
+
+<p><ul><li><b>How to upgrade from =C3=83=C2=98rsted (ET_2012_11)</b></li></u=
l></p>
+
+<p>To upgrade from the previous release, use GetComponents with the new thor=
nlist to check out the new version.</p>
+
+<p>See the <a href=3D"http://einsteintoolkit.org/download/">Download</a> pag=
e on the Einstein Toolkit website for download instructions.</p>
+
+<p><ul><li><b>Remaining issues with this release</b></li></ul></p>
+
+<ul>
+ <li> Certain machines need to be configured specially in Simfactory because=
 the remote directories cannot be determined automatically just from the user=
name.  See the Machine notes below.
+ <li> Recovering with Carpet: The maximum number of timelevels that can be r=
ecovered is Carpet::prolongation_order_time+1. This is usually the case, but =
it is possible to write parameter files e.g. with prolongation_order_time=3D1=
 that use 3 timelevels. This bug manifests in an assert() failure when recove=
ring from checkpoints. The work-around is to either increase Carpet::prolonga=
tion_order_time or decrease the number of timelevels for the grid function in=
 question accordingly.
+</ul>
+
+<p><ul><li><b>Machine notes</b></li></ul></p>
+
+<ul>
+ <li>Kraken:
+defs.local.ini needs to have sourcebasedir =3D $HOME configured for this mac=
hine.  You need to determine $HOME by logging in to the machine.</li>
+ <li>LoneStar and Stampede:
+defs.local.ini needs to have sourcebasedir =3D $WORK and basedir =3D $SCRATC=
H/simulations configured for this machine.  You need to determine $WORK and $=
SCRATCH by logging in to the machine.</li>
+ <li>Pandora:
+The LSU system pandora has at the time of writing not only severe problems o=
f compiling Cactus (can crash the filesystem), but in part due to this also o=
utstanding are some failing testsuite results. Please contact Peter Diener at=
 CCT (LSU) before trying to use this machine.</li>
+</ul>
+
+<p>All repositories participating in this release carry a branch ET_2013_05
+marking this release.  These release branches will be updated if severe
+errors are found.</p>
+
+<p>The "Gauss" Release Team on behalf of the Einstein Toolkit Consortium (20=
13-05-22)</p>
+
+<p>
+&nbsp;&nbsp;&nbsp;Eloisa Bentivegna<br />
+&nbsp;&nbsp;&nbsp;Tanja Bode<br />
+&nbsp;&nbsp;&nbsp;Peter Diener<br />
+&nbsp;&nbsp;&nbsp;Roland Haas<br />
+&nbsp;&nbsp;&nbsp;Ian Hinder<br />
+&nbsp;&nbsp;&nbsp;Frank L=C3=83=C2=B6ffler<br />
+&nbsp;&nbsp;&nbsp;Bruno Mundim<br />
+&nbsp;&nbsp;&nbsp;Christian D. Ott<br />
+&nbsp;&nbsp;&nbsp;Erik Schnetter<br />
+</p>
+
+<p>May 22, 2013</p>
+
+<?php include_once($_SERVER['DOCUMENT_ROOT'].'/global/footer.php');?>
+


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