[Dune] [#506] Coarsening of ALUGrid very slow on large grids

Dune dune at dune-project.org
Tue Sep 15 15:00:08 CEST 2009


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FS#506 - Coarsening of ALUGrid very slow on large grids
User who did this - Uli Sack (usack)

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mit dem damals benutzten Compiler auf dem älteren system:

usack at gaia30:~/entwicklung/64bit/dune/test$ gcc -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --program-suffix=-4.1 --enable-__cxa_atexit --enable-clocale=gnu --enable-libstdcxx-debug --enable-mpfr --enable-checking=release x86_64-linux-gnu
Thread model: posix
gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)

usack at gaia30:~/entwicklung/64bit/dune/test$ more /proc/version
Linux version 2.6.18-6-amd64 (Debian 2.6.18.dfsg.1-24) (dannf at debian.org) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Thu Dec 25 21:08:54 UTC 2008

gibt's deutlich schlechtere Werte, die aber immer noch um Meilen besser sind als das ursprüngöich gepostete:
Refine cycle 5:
marking: 0.776049
preAdapt(): 0
ALUGrid; refine time: 25.8576
ALUGrid; coarse time: 1.23208
ALUGrid; updateStatus time: 0.848053
adapt() 434779 -> 1665515: 27.9377
postAdapt(): 0.932058

Coarsen cycle 0:
marking: 1.33608
preAdapt(): 0
ALUGrid; refine time: 3.38421
ALUGrid; coarse time: 28.2698
ALUGrid; updateStatus time: 0.192012
adapt() 1665515 -> 436699: 31.846
postAdapt(): 0.228014



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