intro story D-Flow FM

 

D-Flow Flexible Mesh

D-Flow Flexible Mesh (D-Flow FM) is the new software engine for hydrodynamical simulations on unstructured grids in 1D-2D-3D. Together with the familiar curvilinear meshes from Delft3D 4, the unstructured grid can consist of triangles, pentagons (etc.) and 1D channel networks, all in one single mesh. It combines proven technology from the hydrodynamic engines of Delft3D 4 and SOBEK 2 and adds flexible administration, resulting in:

  • Easier 1D-2D-3D model coupling, intuitive setup of boundary conditions and meteorological forcings (amongst others).
  • More flexible 2D gridding in delta regions, river junctions, harbours, intertidal flats and more.
  • High performance by smart use of multicore architectures, and grid computing clusters.
An overview of the current developments can be found here.
 
The D-Flow FM - team would be delighted if you would participate in discussions on the generation of meshes, the specification of boundary conditions, the running of computations, and all kinds of other relevant topics. Feel free to share your smart questions and/or brilliant solutions! 

 

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We have launched a new website (still under construction so expect continuous improvements) and a new forum dedicated to Delft3D Flexible Mesh.

Please follow this link to the new forum: 
/web/delft3dfm/forum

Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.

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** PLEASE TAG YOUR POST! **

 

 

Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems

 


Message Boards

`MPIR_ThreadInfo' error sorted with MPICH 3.x instead of MPICH2

Giordano Lipari, modified 4 Years ago.

`MPIR_ThreadInfo' error sorted with MPICH 3.x instead of MPICH2

Youngling Posts: 12 Join Date: 3/23/11 Recent Posts
This can be of interest to those who want to compile and install Delft3D on a Linux system.

During the installation of Delft3D (tag 4440) on a system with Ubuntu Desktop 12.04 64-bit, I bumped into the error

relocation R_X86_64_32 against `MPIR_ThreadInfo' can not be used when making a shared object; recompile with -fPIC

This error is also addressed in the FAQ. The suggestion there is to recompile MPICH2 with the flag -fPIC.

However, after a short exchange with developers of MPICH, I have rather compiled Delft3D by linking it to a recent more version of MPICH (3.1.2 in my case). This solved the issue.

About the naming: MPICH2 and MPICH are the same project. After a stint using MPCHI2 as a merged name for program and version, they came back to the usage of using the name only. MPICH has moved on to version 3, hence nowadays MPICH2 simply means an obsolete version of MPICH.

MPICH2 is still referred to as a necessary package in Fedor Baart's webinar (#3) and in the file $TAG/src/build.sh that has to be customized for a successful installation. My suggestion is that these documents and the FAQ could be updated to reflect the progress with MPICH and avoid setting current users on a tricky path.

I leave this for the developers' review and evaluation. Hope this helps.

Giordano
watermotion.eu
Adri Mourits, modified 4 Years ago.

RE: `MPIR_ThreadInfo' error sorted with MPICH 3.x instead of MPICH2

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Giordano,

Thanks for analysing this and sharing it.

The FAQ and "download source code" are updated. The build.sh and webinare aren't; that will need some more time.

Regards,

Adri
Ben Williams, modified 4 Years ago.

RE: `MPIR_ThreadInfo' error sorted with MPICH 3.x instead of MPICH2

Jedi Knight Posts: 114 Join Date: 3/23/11 Recent Posts
Hi Adri, Giordano.

This is an interesting thread, thanks for sharing.

Looks like MPICH 3.0 may have some significant performance benefits for executing parallel code. Is MPICH in the windows version of Delft3D source code also updated to version 3.0?

If not, is it a relatively simple thing to switch from MPICH2 to MPICH 3.0? Simply download the executable from http://www.mpich.org/downloads/ and edit references in the source code appropriately?

Best regards,

Ben
Adri Mourits, modified 4 Years ago.

RE: `MPIR_ThreadInfo' error sorted with MPICH 3.x instead of MPICH2

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Ben,

Please try it and post your findings here.

Thanks.

Adri
RD
rayan dexter, modified 1 Month ago.

RE: `MPIR_ThreadInfo' error sorted with MPICH 3.x instead of MPICH2

Youngling Posts: 1 Join Date: 10/24/19 Recent Posts
Ben Williams:

Hi Adri, Giordano.

This is an interesting thread, thanks for sharing.

Looks like MPICH 3.0 may have some significant performance benefits for executing parallel code. Is MPICH in the windows version of Delft3D source code also updated to version 3.0?

If not, is it a relatively simple thing to switch from MPICH2 to MPICH 3.0? Simply download the executable from https://theessayservice.org and edit references in the source code appropriately?

Best regards,

Ben

Hello! Are there any updates as for the performance benefits for executing parallel code? Was it confirmed?