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Online MPI trace compression using event flow graphs and wavelets
KTH, Centra, SeRC - Swedish e-Science Research Centre.ORCID-id: 0000-0001-9693-6265
KTH, Centra, SeRC - Swedish e-Science Research Centre. KTH, Skolan för datavetenskap och kommunikation (CSC), Beräkningsvetenskap och beräkningsteknik (CST).ORCID-id: 0000-0002-9901-9857
2016 (engelsk)Inngår i: Procedia Computer Science, Elsevier, 2016, s. 1497-1506Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Performance analysis of scientific parallel applications is essential to use High Performance Computing (HPC) infrastructures efficiently. Nevertheless, collecting detailed data of large-scale parallel programs and long-running applications is infeasible due to the huge amount of performance information generated. Even though there are no technological constraints in storing Terabytes of performance data, the constant flushing of such data to disk introduces a massive overhead into the application that makes the performance measurements worthless. This paper explores the use of Event flow graphs together with wavelet analysis and EZW-encoding to provide MPI event traces that are orders of magnitude smaller while preserving accurate information on timestamped events. Our mechanism compresses the performance data online while the application runs, thus, reducing the pressure put on the I/O system due to buffer flushing. As a result, we achieve lower application perturbation, reduced performance data output, and the possibility to monitor longer application runs. © The Authors. Published by Elsevier B.V.

sted, utgiver, år, opplag, sider
Elsevier, 2016. s. 1497-1506
Emneord [en]
Event flow graphs, EZW coding, MPI performance monitoring, Trace compression, Wavelets, Application programs, Graphic methods, Wavelet analysis, Event-flow graph, Performance monitoring, Flow graphs
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Identifikatorer
URN: urn:nbn:se:kth:diva-194600DOI: 10.1016/j.procs.2016.05.471Scopus ID: 2-s2.0-84978517854OAI: oai:DiVA.org:kth-194600DiVA, id: diva2:1044118
Konferanse
International Conference on Computational Science, ICCS 2016, 6 June 2016 through 8 June 2016
Merknad

Conference Paper. QC 20161102

Tilgjengelig fra: 2016-11-02 Laget: 2016-10-31 Sist oppdatert: 2016-11-02bibliografisk kontrollert

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