Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
1 PublicationProfiling of RT-PICLS Code
It was observed, that the RT-PICLS code ran by FWKT on the hypnos cluster was producing an unusual amount of system load, according to Ganglia metrics. Since this may point to an IO-problem in the code, this code was analyzed more closely.
RT-PICLS was run with additionally provided input data on 64 CPU cores (AMD Opteron) in a single node of the hypnos cluster. Score-P 4.0 with IO-tracing support was used for profiling and tracing of the application. A developer version of Vampir 9.2 [3] enabled graphical analysis of the traces.
Different file systems were evaluated for storing the output:
- bigdata: the high-performance file system of the cluster based on GPFS.
- nfs: a loop-mounted EXT4 image mounted to the current compute node via NFS.
- scr: the local scratch file-system of the compute node.
- tmpfs: a virtual filesystem, physically located in the main memory of the compute node.
The trace files that were used to compile the referenced report are collected in this upload.
Keywords: Scorep; Vampir; Tracing; Profiling
Related publications
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Profiling of RT-PICLS Code
ROBIS: 25474 is a supplement to this (Id 27417) publication
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Reseach data in the HZDR data repository RODARE
Publication date: 2018-04-25 Open access
DOI: 10.14278/rodare.15
Versions: 10.14278/rodare.16
License: CC-BY-4.0
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Permalink: https://www.hzdr.de/publications/Publ-27417