[overture] Re: New Overture release v24
- From: Dominic Chandar <dominic.chandar@xxxxxxxxx>
- To: overture@xxxxxxxxxxxxx
- Date: Tue, 24 May 2011 15:14:34 -0600
Hi Kyle,
Thanks for the update. Currently, I'm working on Unstructured meshes,
mostly applicable to Incompressible/Compressible Flow solver on the GPU,
very similar to cgins ( using same algorithms etc ). I'm very much
interested to see the gpu performance on hybrid grids. I will try the 2D
smesh initially.
Also does smesh reorder the nodes/edges so that the computations are cache
efficient ?
Regards,
Dominic
On Tue, May 24, 2011 at 1:01 PM, Kyle K. Chand <chand1@xxxxxxxx> wrote:
> Hi Dominic,
>
> The 2D unstructured mesh generator smesh is now in the distribution.
> It was supposed to be in the last one but by an oversight it did not make
> it.
> You can get some documentation for smesh on or documents page.
>
> As for 3D meshes, you can try generating a 3D hybrid grid from an
> overlapping
> grid. I also wrote a 3D high-order tet mesher that combines our CAD/IGES
> stuff
> with the advancing front mesh generator. Do you have any interest in that?
> I never
> thought about including it with the Overture release...
>
> Kyle
>
> mailto: chand1@xxxxxxxx
> phoneto: (925) 422 7740
>
>
>
>
> On May 23, 2011, at 3:22 PM, Dominic Chandar wrote:
>
> Hi Joel,
>>
>> It definitely is tempting to use Overture with Petsc+gpu, but
>> you will have to transfer data back and forth between CPU and GPU every
>> time step ( cudaMemcpy - I believe you are using cuda ) which will spoil the
>> speed-up. I guess, when using GPU's, one can reap a lot of benefit only if
>> the entire computation is done on the GPU.
>>
>> Bill,
>> Thanks for a new release ! Do we have any unstructured grid
>> generator shipped with Overture this time ?
>>
>> regards,
>> Dominic
>>
>>
>> On Mon, May 23, 2011 at 3:27 PM, Joel Guerrero <joegi.geo@xxxxxxxxx>
>> wrote:
>> Hi Bill,
>>
>> Great work, I can't wait to try this new version. Just one question,
>> lately I have been playing around with petsc + gpu, so I wonder if it will
>> be possible to use th epetsc gpu accelerated solver with overture.
>>
>> Regards,
>>
>> Joel
>>
>> From: Bill Henshaw <henshaw@xxxxxxxx>
>> To: freelists <overture@xxxxxxxxxxxxx>
>> Sent: Mon, May 23, 2011 9:39:55 PM
>> Subject: [overture] New Overture release v24
>>
>> Dear Overture users:
>>
>> Announcing the release of Overture.v24 and cg.v24.
>>
>> These are now available from the Overture web page.
>>
>> A list of some of the major changes to Overture and cg are
>> given below (from the Overture/CHANGES and cg/Changes files).
>>
>> Please let us know if you have troubles building or using
>> the new version or if we have forgotten to fix some bug that
>> has been previously reported.
>>
>>
>> Regards,
>> #6.
>>
>>
>>
>> ======================================================================================================
>> Overture.v24 - released May 20, 2011
>>
>> Changes:
>>
>> Overture.v24
>> Changes:
>> NOTE: Due to a bug fix in the HDF file output (100329 below) you will
>> need to regenerate your grids and showfiles
>> for this new version.
>>
>> o there is a new graphics option, "set home", (in the command window
>> "File menu") that will make the
>> current view the "home" view. The home view is the one that
>> appears when using the "reset"
>> command (the button with the "home" on it). The "reset" button
>> (command GLOB:init view)
>> will return the home view to the default.
>> o 090422 : fixed a bug in ogen that mainly applied to multi-domain grids
>> -- sometimes interpolation
>> was allowed between grids from different domains. (classify.C
>> l.2615)
>> o 090423 : added a check to mogl.C for NumLock being on -- a message is
>> printed if it is.
>> You should turn off NumLock since the mouse buttons won't work
>> properly.
>> o 090429 : fixed a bug in CompositeGrid.C for grids saved from parallel
>> ogen, some of the
>> interpolation info was not saved correctly
>> (convertLocalInterpolationData).
>> o 090529 : fixed plotting of sequences in plotStuff with multi-domain
>> problems. The sequences to plot
>> now appear on the main dialog.
>> o 090530 : NOTE: running remotely with the gnome window manager can be
>> slow when running command files
>> interactively, (not sure why?), KDE seems less likely to have
>> this problem. See note below 090809.
>> o 090531 : fixed a problem with rubber-band zooming (with middle mouse
>> button) with
>> extreme zooms (e.g. for fixing trim curves) and picking objects
>> -- this works better now.
>> o 090628 : contour2d, when picking values with the mouse, hidden grids
>> will not be used.
>> o 090705 : now when a moving grid computation fails with an invalid grid,
>> the program enters
>> the normal interactive update mode of Ogen so you can
>> remake/query the grid (before the
>> program entered some funny update mode that was confusing).
>> o 090705 : fixed bug with moving grids, the bounding box was not always
>> computed correctly which
>> led to ogen failing when it should have worked (this bug was
>> caused by some code added for parallel).
>> o 090804 : fixed a bug in the ogen's moving grid algorithm: the mask on
>> ghost points was not always set
>> correctly (the problem occurs when a grid "slides" along a
>> shared boundary).
>> o 090808 : there are new parallel copy routines to copy a serial array
>> from one processor to another, see
>> ParallelUtility.h and CopyArray.bC
>> o 090809 : there is a new option for the .overturerc file:
>> showCommandHistory: 1 # set to 0 if interactive scripts
>> are slow to display
>> Sometimes running scripts interactively is very slow when
>> running over a network and
>> this may be fixed by setting this option to '0'.
>> o 090913 : The new plot option 'set plot bounds' (from the grid or
>> contour plotter) allows one to
>> set fixed bounds on x, y and z. Useful when the grid deforms
>> and changes size.
>> Use 'reset plot bounds' to turn off.
>> o 091127 : The new InterpolatePointsOnAGrid class can be used to
>> interpolate a set of points in space
>> from a composite grid function. This functionality works in
>> parallel and supports higher order
>> interpolation. It replaces the old InterpolatePoints class and
>> even older interpolatePoints function.
>> o 091127 : The ExposedPoints class now works in parallel (used to
>> interpolate points that become "exposed"
>> during a moving grid computation).
>> o 091127 : Fixed some bugs for the parallel version of "extrapolate
>> interpolation neighbours" that is used
>> to assign values to unused points next to interpolation points
>> (allowing a wider stencil to be used).
>> o 091209 : there are new parallel copy functions in the CopyArray class
>> for copying serial arrays into a
>> single distributed array (see ParallelUtility.h and
>> CopyArray.bC). This is more general than
>> the normal P++ copy since the serial arrays can be arbitrarily
>> distributed.
>> o 091209 : There are a variety of new grid generation examples in the
>> sampleGrids directory including:
>> cubeInABox.cmd, slider.cmd, squareHole.cmd, sphere.cmd,
>> rotatedBoxBesideBox.cmd
>> valveArg.cmd, plateWithHoles.cmd, plate3dWithHoles.cmd
>> wing3d.cmd, backStepSmooth3d.cmd,
>> divot.cmd, afm.cmd, lens.cmd, solidSphereInABox.cmd
>> o 100226 : The Integrate class should now work in parallel.
>> o 100309 : There is a new LoftedSurfaceMapping that can be used to define
>> a lofted surface such as the
>> surface of a wing with a tip. This mapping was used to build
>> some of the surfaces for
>> the overlapping grid for the model wind-turbine with tower and
>> nacelle.
>> o 100329 : Bug fixed in the HDF file output of parallel distributed
>> arrays when using the multiple file output
>> option (which is the default). Space was being allocated in the
>> main hdf file for the whole array
>> even though no data was written there. This meant that the main
>> hdf file was huge when it
>> should not have been. Thanks to Jeff Banks for noticing this.
>> o 100424 : In cleaning up the MappedGrid the "min and max edge length"
>> arrays were removed since these are
>> rarely used.
>> o 100722 : There is a new "exponential to linear" stretching option which
>> might be a good choice for
>> clustering grid points near boundaries. This function can be
>> used to create very small grid
>> cells near boundaries if desired.
>> o 110211 : There are two new functions in showFileFromDataFile.C that can
>> be used to read and write a
>> grid and solution from an 'ovText' data file. Use 'plotStuff
>> -ovText' to read in a grid and
>> solution from an "ovText" data file (choose the menu item 'data
>> file format' to
>> display the format of the file). From the plotStuff menu use
>> 'save ovText file' to save
>> a grid and solution from a show file into an ovText data file.
>> This is a good way to
>> import a grid and solution into Overture. The solution can
>> subsequently be used as initial conditions
>> for one of the CG solvers, for example. This format is better
>> than the plot3d format since it
>> has more information about boundary conditions, ghost points
>> etc.
>> o 110515 : There is a new "transferSolution" program in Overture/bin that
>> can be used to interpolate a
>> solution from one overlapping grid to another overlapping grid
>> (e.g. a finer grid, or a grid
>> on a larger or smaller domain.). The program reads a solution
>> from a "source" show file and outputs the
>> results to a new "target" show file.
>> o 110515 : Some improvements have been made for reading and writing
>> plot3d files. There is a new option "save plot3d file" in the
>> plotStuff menu that allows one to save a solution and grid
>> into plot3d files (these could then be shown in another
>> graphics program for e.g.).
>> plotStuff can read plot3d grid and solution ("q" or "f") files
>> using the
>> command "plotStuff -plot3d".
>>
>>
>> ==============================================================================================
>> cg.v24 -- released May 20, 2011
>>
>>
>> Changes:
>>
>> o There have been many changes to the CG solvers and I have not kept a
>> careful list.
>>
>> o a new "matrix motion" option has been added for moving grids which can
>> be used to compose together
>> different rotations and translations to form more complex motions. See
>> the new document matrixMotion.pdf
>> for more details. The test routine cg/user/bin/motion can be used to
>> test different matrix motions.
>>
>>
>>
>>
>>
>>
>
>
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