El 21/08/2011, a las 19:53, Barry Smith escribi?: > > On Aug 21, 2011, at 12:21 PM, Jose E. Roman wrote: > >> >> Ok. I will take the opportunity to update the other partitioners. By the >> way, the interface to Jostle is broken. Jostle is not distributed in source >> code, so I would vote for removing the interface. Any objection? > > Yes, take Jostle out.
Done. By the way, --download-ptscotch gets it from gforge.inria.fr rather than ftp.mcs.anl.gov. This may cause problems in the future. Jose > > Supposedly someone here is doing a new parmetis so you shouldn't do that one. > >> >> Question: I used identifiers such as MP_PTSCOTCH_QUALITY as a shortcut of >> MATPARTITIONING_PTSCOTCH_QUALITY. Should the long version be preferred? > > We are limited by 31 characters total so your short cut is correct. > > Barry > >> >> Jose >> >> >> El 20/08/2011, a las 22:17, Barry Smith escribi?: >> >>> >>> I have updated all the Scotch stuff to use the proper PTScotch names: >>> >>> --download-ptscotch -mat_partitioning_type ptscotch >>> MatPartitioningSetType(p,MATPARTITIONINGPTSCOTCH) Scotch.py to PTScotch.py >>> etc etc >>> >>> You will need to hg pull BuildSystem also. >>> >>> >>> Barry >>> >>> >>> On Aug 20, 2011, at 3:10 AM, Jose E. Roman wrote: >>> >>>> >>>> El 20/08/2011, a las 05:45, Barry Smith escribi?: >>>> >>>>> >>>>> Questions for anyone with knowledge on this subject: >>>>> >>>>> Are Scotch and ptscotch different packages? >>>> >>>> They are different libraries but are included in the same distribution >>>> file. The tarball contains both the serial and parallel versions (as >>>> opposed to e.g. Metis/Parmetis). >>>> >>>>> >>>>> How come the download site has scotch_5.1.11.tar.gz and >>>>> scotch_5.1.11_esmumps.tar.gz and neither mentions ptscotch do one or both >>>>> of them contain ptscotch? Do either contain scotch? What is the mumps >>>>> business in the name? >>>> >>>> Both of them contain scotch+ptscotch. I have diff'ed the two of them. The >>>> esmumps one contains an additional file esmumps.c with a single function >>>> esmumps(): "This routine acts as an interface between ordering software >>>> such as MUMPS and Scotch+Emilio." The other difference is that esmumps has >>>> typedef int32_t SCOTCH_Num; >>>> instead of >>>> typedef int SCOTCH_Num; >>>> (also for indices) so probably 64-bit integers/indices are disabled in >>>> this version. >>>> >>>>> >>>>> If this uses ptscotch why is the call in the source code >>>>> SCOTCH_dgraphBuild()? and doesn't mention pt? >>>> >>>> The differences in usage/interface between scotch and ptscotch are very >>>> small: >>>> 1) One has to include either scotch.h or ptscotch.h, and link with >>>> -lscotch or -lptscotch >>>> 2) For ptscotch one has to use distributed graphs, i.e. call >>>> SCOTCH_dgraph*() instead of SCOTCH_graph*() >>>> Apart from this, the interface seems to be the same. >>>> >>>>> >>>>> If scotch and ptscotch are different shouldn't scotch.py be called >>>>> ptscotch.py? >>>> >>>> They are different because the algorithms available in the parallel >>>> version are much more limited compared to the serial version. But since >>>> they are both included in the same distribution file, I guess it doesn't >>>> matter to call it scotch.py or ptscotch.py. >>>> >>>> In terms of MatPartitioning, it could be possible to create two >>>> partitioners, one for scotch and another for ptscotch. But I think it is >>>> far more useful to have the ptscotch interface, because the sequential one >>>> would require gathering the whole graph in a single process (as it happens >>>> with chaco and party). Also, in that case one could also have another one >>>> for Metis (since the method is not exactly the same as Parmetis). >>>> >>>> >>>>> >>>>> Pastix seems to use either scotch or ptscotch? Will anyone ever fix the >>>>> install of pastix.py for PETSc? Will that require a --download-scotch >>>>> that installs sequential scotch? >>>> >>>> I have no idea about Pastix (I haven't seen pastix.py in petsc-dev), but I >>>> guess it will be enough to force --download-scotch together with >>>> --download-pastix. >>>> >>>> Jose >>>> >>>>> >>>>> >>>>> Barry >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> On Aug 19, 2011, at 6:10 PM, Jose E. Roman wrote: >>>>> >>>>>> I have rewritten the Scotch interface so that it can be used again as a >>>>>> MatPartitioning object. I have done limited testing, so please let me >>>>>> know if problems arise. >>>>>> >>>>>> The interface is really to PT-Scotch rather than serial Scotch. >>>>>> >>>>>> Some comments regarding configure's download-scotch option: >>>>>> - It will probably fail in batch environments since the program >>>>>> 'dummysizes' must be run before compiling >>>>>> - Compilation requires lex & yacc, I don't know if these are tested by >>>>>> configure. >>>>>> >>>>>> Jose >>>>>> >>>>> >>>> >>> >> >
