NDLI: MPI performance engineering with the MPI tool interface: the integration of MVAPICH and TAU

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MPI performance engineering with the MPI tool interface: the integration of MVAPICH and TAU

Content Provider	ACM Digital Library
Author	Malony, Allen D. Mahéo, Aurèle Shende, Sameer Panda, Dhabaleswar K. DK Subramoni, Hari Ramesh, Srinivasan
Abstract	MPI implementations are becoming increasingly complex and highly tunable, and thus scalability limitations can come from numerous sources. The MPI Tools Interface (MPI_T) introduced as part of the MPI 3.0 standard provides an opportunity for performance tools and external software to introspect and understand MPI runtime behavior at a deeper level to detect scalability issues. The interface also provides a mechanism to re-configure the MPI library dynamically at runtime to fine-tune performance. In this paper, we propose an infrastructure that extends existing components - TAU, MVAPICH2 and BEACON to take advantage of the MPI_T interface to offer runtime introspection, online monitoring, recommendation generation and autotuning capabilities. We validate our design by developing optimizations for a combination of production and synthetic applications. We use our infrastructure to implement an autotuning policy for AmberMD[1] that monitors and reduces MVAPICH2 library internal memory footprint by 20% without affecting performance. For applications where collective communication is latency sensitive such as MiniAMR[2], our infrastructure is able to generate recommendations to enable hardware offloading of collectives supported by MVAPICH2. By implementing this recommendation, we see a 5% improvement in application runtime.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISBN	9781450348492
DOI	10.1145/3127024.3127036
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2017-09-25
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Performance recommendations Performance engineering Mvapich2 Beacon Tau Mpi_t Autotuning Runtime introspection
Content Type	Text
Resource Type	Article

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2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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