5th-easybuild-hackathon---meeting-minutes-day-3.md

[[5th easybuild hackathon]] - notes day 1 - notes day 2

Discussion about current status of easyconfig format v2

bikeshedding discussion about dependency specifications in format v2

format v1 (for reference)

dependencies = [
    ('GCC', '4.8.1'),
    ('OpenMPI', '1.6.4', '', ('GCC', '4.7.2'),
    ('OpenBLAS', '0.2.6', '-LAPACK-3.4.2', ('gompi', '1.4.10')),
    ('FFTW', '3.3.3', '', ('gompi', '1.4.10')),
    ('ScaLAPACK', '2.0.2', '-OpenBLAS-0.2.6-LAPACK-3.4.2', ('gompi', '1.4.10')),
]

moduleclass = tools

format v2 (current format)

moduleclass = tools

[DEPENDENCIES]
GCC = 4.7.2
OpenMPI = 1.6.4; GCC == 4.7.2
OpenBLAS = 0.2.6 suffix:-LAPACK-3.4.2; gompi == 1.4.10
FFTW = 3.3.3; gompi == 1.4.10
ScaLAPACK = 2.0.2 suffix:-OpenBLAS-0.2.6-LAPACK-3.4.2; gompi == 1.4.10

brainstorm results

• single-line dependency specification (no dedicated section for dependencies):

dependencies = GCC(4.8.1), OpenMPI(1.6.5, gompi == 1.4.10), gompi(1.1.10, suffix:-no-OFED), OpenBLAS(>= 0.2.6, suffix:-LAPACK-3.4.2, goalf == 1.1.10 suffix:-no-OFED)

• multi-line dependency specification (no dedicated section for dependencies):

dependencies =
    GCC(4.7.2),
    OpenMPI(1.6.4, GCC == 4.7.2),
    gompi(1.1.10, suffix:-no-OFED),
    OpenBLAS(>= 0.2.6, suffix:-LAPACK-3.4.2, goalf == 1.1.10 suffix:-no-OFED),
    ...

• format v2 (proposed format for dependencies section)

moduleclass = tools

[DEPENDENCIES]
GCC(4.7.2)
OpenMPI(1.6.4, GCC == 4.7.2)
OpenBLAS(>= 0.2.6, suffix:-LAPACK-3.4.2, gompi == 1.1.10 suffix:-no-OFED)
...

• alternative (using keys for all entries, for consistency)

[DEPENDENCIES]
...
OpenBLAS(version: >= 0.2.6, suffix:-LAPACK-3.4.2, toolchain: (goalf == 1.1.10 suffix:-no-OFED))
...

• (fictive) example for ictce toolchain:

[DEPENDENCIES]
icc(2013_sp1.1)
ifort(2013_sp1.1)
imkl(2013_sp1.1)
impi(2013_sp1.1)

• exceptions for dependencies, based on toolchain

[goolf == 1.1.10]
[[DEPENDENCIES]]
CMake(2.8.5, gompi == 1.1.10)

• sanity check section:

[SANITY_CHECK]
files = foo, bar
dirs = bin, lib

• work out Scalasca example

# EASYBUILDFORMAT 2.0

name = 'Scalasca'

[SUPPORTED]
versions = > 2.0
toolchains = goolf == 1.4.10, ictce == 5.5.0, goalf == 1.1.0 suffix:-no-OFED

[DEPENDENCIES]
Score-P = >= 1.2
Cube = > 4.0  # Cube/4.0-goolf-1.4.10, Cube/4.0-ictce-5.5.0
Opari = > 1.0, dummy == dummy  # Opari/1.0
[[goolf]]
zlib = 1.2.8, gompi == 1.4.10  # zlib/1.2.8-gompi-1.4.10
[[goalf]]
zlib = 1.2.8, gompi > 1.0
[[ictce]]
zlib = (> 1.0 && < 3.0) || != 2.4.5   # version range example

# versionsuffix section
[> 0.0 suffix:-foo]
versionsuffix = -foo

Discussions

• Cube really shouldn't sneakily add --disable-gui if it doesn't like the Qt version it finds

• stacked variables support in Lmod for defining e.g. $CC, etc.

• still leaves issues with unloading modules and surprising users (unless the modules tool is very verbose w.r.t. redefining env vars)

• Markus: modules shouldn't define $CC, etc.

• also ties to mpicc and its behavior (e.g. default compiler is GCC for Intel MPI's mpicc)

Hackathon

• Inge: make Elpa build work after setting $FCFLAGS and $LIBS, providing patch file for tests, set parallel = 1, etc.

• TODO: fix website: throw out disclaimer, fix demo, mention bootstrap as primary way of installing it

• discussions on toolchain-independent modules

• build with goolf or dummy, statically link, generate module with dummy toolchain

• see easybuilders/easybuild-framework#570

• Fotis: full bootstrap:

• build Python, Lua, Lmod

• bootstrap EasyBuild on top

• install Python/Lua/Lmod modules using ev

• source a script to set up Lmod environment

• install EasyBuild with EasyBuild :)

• Markus: interest in adding support for building/using other compilers: Open64, Path64, PGI, …

• TODO: send old easyblocks for Open64 + Path64 to Marcus (update: done)

• Fotis: pymodules, modules tool implemented in Python

• Robert McLay developed a Python modules tool in a previous life

• Alan: set up Lmod on JUROPA3

• use Lmod provided by EasyBuild

• create extra module to use as dependency to avoid requiring source $EBROOTLMOD/init/bash

• Gunther: build own Intel toolchain (intel/14.0.1) with customizations to Intel MKL (e.g. MKLPATH), ...

Next steps post-hackathon

• Markus:
• hierarchical modules
• support more compilers (building and using them)
• add support for job submission to SLURM
• ...
• Bernd + Anke: switch from UNITE to EB, add support for new (versions of) performance tools, … write easyblock for Tau, HPC Toolkit, ... replace current software packaging crap with EasyBuild?
• Alan: pitch use of EasyBuild and Lmod on JUROPA3
• switch to Lmod may be sensitive, to make sure it works everywhere w.r.t. setting up Lmod environment (e.g. make sure tclsh works everywhere)
• HPC-UGent:
• fix issues uncovered during hackathon
• documentation on getting started with easyblocks, e.g. how do you replace easyconfig parameters with sections in an easyblock, concrete use cases, examples, ...
• look into JuBe in a VSC context

JUBE

• rewrite from scratch after studying the design and features?
• EasyBuild resolves a large part of it
• current framework in Perl is too broken to further extend it
• can be used for testing EasyBuild, UNITE performance tools, ...
• mympirun (and myscoop) can fill in a a large chunk of this too?

another idea for dependency specifications

(by Kenneth, after hackathon)

dependency_1-gcc = (GCC, 4.7.2)
dependency_2-openmpi = (OpenMPI, 1.6.4, GCC == 4.7.2)
dependency_3-openblas = (OpenBLAS, >= 0.2.6, suffix:-LAPACK-3.4.2, gompi == 1.1.10 suffix:-no-OFED)
dependency_4-fftw = (FFTW, 3.3.3, gompi == 1.1.10 suffix:-no-OFED)
dependency_5-scalapack = (ScaLAPACK, 2.0.2, suffix:-OpenBLAS-0.2.6-LAPACK-3.4.2, gompi == 1.1.10 suffix:-no-OFED)

dependency_1 = GCC(4.7.2)
dependency_2 = OpenMPI(1.6.4, GCC == 4.7.2)
dependency_3 = OpenBLAS(>= 0.2.6, suffix:-LAPACK-3.4.2, gompi == 1.1.10 suffix:-no-OFED)
dependency_4 = (FFTW, 3.3.3, gompi == 1.4.10)
dependency_5 = (ScaLAPACK, 2.0.2, suffix:-OpenBLAS-0.2.6-LAPACK-3.4.2, gompi == 1.1.10 suffix:-no-OFED)