#2595: Modern Intel compilers struggle to compile McLachlan resulting in extremely long build times
Reporter: Gabriele Bozzola Status: new Milestone: Version: development version Type: bug Priority: minor Component:
As mentioned in ET Call on 09/02/22.
I am compiling a subset of the latest release of the Einstein Toolkit with one of latest version available of Intel oneAPI (2021.5). I am attaching thornlist and optionfile.
I see warnings like this:
``` /home/sbozzolo/storage/codes/einstein_toolkit/Cactus/configs/sim/build/ML_BSSN/ML_BSSN_EvolutionInteriorSplitBy2.cc(49): warning #16219: Some OpenMP processing was skipped to constrain compile time. Consider overriding limits (-qoverride-limits). ```
which essentially informs me that the compiler cannot optimize the code within a time frame that is heuristically determined.
As a result, compilation takes a very long time (several tens of minutes). I have seen this on other supercomputers with compilers from 2019.
(I don’t seem able to attach two files, so I am attaching only the option list. ) attachment: generic-intel.cfg (https://api.bitbucket.org/2.0/repositories/einsteintoolkit/tickets/issues/25...)
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