Difference between revisions of "BwUniCluster2.0/FAQ - broadwell partition"
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$ icc/ifort -xCORE-AVX2 -axCORE-AVX512 [-further_options] |
$ icc/ifort -xCORE-AVX2 -axCORE-AVX512 [-further_options] |
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</pre> |
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− | == What happens with code compiled for old partition whic is running on the extension partition? == |
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− | Code will run but significantly slower since AVX2 will not be used. Please recompile your code accordingly. |
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− | <!--* To compile the same jobs on uc1 and uc1e, you have to use appropriate flags. Otherwise the submitted jobs will be crashed. Some of the main flags are:--> |
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= Job execution = |
= Job execution = |
Revision as of 12:45, 20 April 2020
FAQs concerning best practice of bwUniCluster broadwell partition (aka "extension" partition).
Contents
1 Login
1.1 Are there separate login nodes for the bwUniCluster broadwell partition?
- Yes, but primarily to be used for compiling code.
1.2 How to login to broadwell login nodes?
- You can directly login on broadwell partition login nodes using
$ ssh username@uc1e.scc.kit.edu
- If you are compiling code on broadwell login nodes, your code will not optimally run on the new "Cascade Lake" nodes.
2 Compilation
2.1 How to compile code on broadwell (extension) nodes?
To use the code only on the partition multiple_e:
$ icc/ifort -xHost [-further_options]
2.2 How to compile code to be used on ALL partitions?
On uc1e (= extension) login nodes:
$ icc/ifort -xCORE-AVX2 -axCORE-AVX512 [-further_options]
3 Job execution
3.1 How to submit jobs to the broadwell (= extension) partition
The submitted job will be distributed either way to the broadwell nodes if specified correctly, i.e.:
$ sbatch -p multiple_e
3.2 Can I use my old multinode job script for the new broadwell partition?
Yes, but please note that all broadwell nodes do have 28 cores per node.