Package: libdune-istl-dev Version: 2.6.0-2 Severity: normal Dear Maintainer,
I think that libdune-istl-dev should at least recommend libscotchparmetis-dev (or better: even depend on it like for superlu and libsuitesparse). The parallel version of the AMG will suffer from scalability issues otherwise. Note that the non-free libparmetis-dev would resolve this, too, but is not usable by everybody. * What led up to the situation? Installing libdune-istl-dev without installing either libparmetis-dev or libptscotchparmetis-dev. Write an example program that uses AMG and run it on a parallel computer with more than 32 processes. >From a certain number of processes you will see a warning : "Successive accumulation of data on coarse levels only works with ParMETIS installed." * What exactly did you do (or not do) that was effective (or ineffective)? To remedy I need to install libscotchparmetis-dev and recompile the program. * What was the outcome of this action? Having libscotchparmetis-dev makes the warning go away * What outcome did you expect instead? I expected that just installing libdune-istl-dev would actually install libscotchparmetis-dev to make using the more scalable version of the parallel AMG solver the default in other/user DUNE modules. Thanks a lot in advance! Cheers, Markus -- System Information: Debian Release: 10.6 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-debug'), (500, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.19.0-12-amd64 (SMP w/32 CPU cores) Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages libdune-istl-dev depends on: ii libdune-common-dev 2.6.0-3 ii libsuitesparse-dev 1:5.4.0+dfsg-1 ii libsuperlu-dev 5.2.1+dfsg1-4 libdune-istl-dev recommends no packages. Versions of packages libdune-istl-dev suggests: pn libdune-istl-doc <none> -- no debconf information