Hi Martin, openblas will ignore the optarch option in easybuild but you can use something like this in the OpenBLAS easyconfig
buildopts = 'TARGET=SANDYBRIDGE BINARY=64 ' + threading + ' CC="$CC" FC="$F77"' here you have the list of supported targets in openblas https://github.com/xianyi/OpenBLAS/blob/develop/TargetList.txt If you want to share the same openblas installation across all your different cpu types you will need to use the target which match your oldest cpu. Another approach is to maintain a different software stack by cpu type as described in the slides I attach (page 9) regards, Pablo. 2015-07-14 13:21 GMT+02:00 Martin <[email protected]>: > Hi, > > I have a couple of different CPUs and in my situation EB is not so much > about a HPC site or repeatable build but rather about managing the stuff. > So here's the thing: > > When using R/3.2.0-foss-2015a-bare (just a simply --try-software-version > easyconfig) and subsequently installing a few R packages will work on one > host but fail on another. > > The error is a classical illegal instruction in the underlying OpenBLAS > library (I could reproduce this specific problem > > The problem is that OpenBLAS/0.2.13-GCC-4.9.2-LAPACK-3.5.0 seems to > using some magic so that is is processor dependent. The processors involved > are: > > * AMD Opteron(TM) Processor 6238 and > * Six-Core AMD Opteron(tm) Processor 8431 > > There are also a few Intel processors and a few other AMD CPUs here. > What I'm looking for is a setting for easybuild that optimizes for > portability between compatible CPU architectures. > > Does anyone have suggestions how to achieve the most compatibility and > care less about byte-level reproducability or performance? The target > platform I have in mind is "64bit x86 compatible". > > I have optarch="" in my config.cfg where I thought that would already > take care of it. > > Any thoughts would be appreciated. > > /Martin > -- > -- > http://www.xing.com/profile/Martin_Marcher > http://www.linkedin.com/in/martinmarcher > Mobil: +43 / 660 / 62 45 103 > UID: ATU68801424 > -- Pablo Escobar López HPC systems engineer Biozentrum, University of Basel Swiss Institute of Bioinformatics SIB Email: [email protected] Phone: +41 61 267 21 80 http://www.biozentrum.unibas.ch
hpc-ch-slides.pdf
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