MultiLevel Docomposition

Typhoon · January 31, 2012, 08:43

Dear All,

do you have any experience with the new multiLevel docomposition (core/node)? How much does it accelerate? Do you know some reference, validation, testing?

Have a nice day,
Typhoon

wyldckat · January 31, 2012, 17:11

Greetings Typhoon,

The closest thing I've seen here in the forum is the n-halo decomposition: http://www.cfd-online.com/Forums/ope...alo-layer.html - so you might want to ask thibault_pringuey directly what results he got.

The other closest thing I know of is the work that is either being done or has already been done in the variant OpenFOAM 1.6-ext, where multi-threading capabilities have been (or tried to) added. I've never used it like that, so I don't have a clue if it's better or not.

The other thing you might want to look for is OpenFOAM with "OpenMP" (not OpenMPI), but I haven't seen anything about yet.

Best regards,
Bruno

swifty · April 23, 2012, 20:42

Did you ever figure out how to do multi level decomposition and what the speed up is?

January 31, 2012, 08:43	MultiLevel Docomposition	#1
Typhoon New Member Join Date: Dec 2010 Posts: 9 Rep Power: 15	Dear All, do you have any experience with the new multiLevel docomposition (core/node)? How much does it accelerate? Do you know some reference, validation, testing? Have a nice day, Typhoon

January 31, 2012, 17:11		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,982 Blog Entries: 45 Rep Power: 128	Greetings Typhoon, The closest thing I've seen here in the forum is the n-halo decomposition: http://www.cfd-online.com/Forums/ope...alo-layer.html - so you might want to ask thibault_pringuey directly what results he got. The other closest thing I know of is the work that is either being done or has already been done in the variant OpenFOAM 1.6-ext, where multi-threading capabilities have been (or tried to) added. I've never used it like that, so I don't have a clue if it's better or not. The other thing you might want to look for is OpenFOAM with "OpenMP" (not OpenMPI), but I haven't seen anything about yet. Best regards, Bruno __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

April 23, 2012, 20:42		#3
swifty New Member Join Date: Apr 2012 Location: UK Posts: 3 Rep Power: 14	Did you ever figure out how to do multi level decomposition and what the speed up is?