I/O Characterization of a Portable Astrophysics Application on the IBM SP and Intel Paragon

I/O Characterization of a Portable Astrophysics Application on the IBM SP and Intel Paragon (1995)

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by Rajeev Thakur , Ewing Lusk , William Gropp

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Datum	Value	Source
TITLE	I/O Characterization of a Portable Astrophysics Application on the IBM SP and Intel Paragon	user correction - Legacy Corrections
AUTHOR NAME	Rajeev Thakur	user correction
AUTHOR AFFIL	Mathematics and Computer Science Division; Argonne National Laboratory	user correction
AUTHOR ADDR	9700 S. Cass Avenue; Argonne, IL 60439	user correction
AUTHOR NAME	Ewing Lusk	user correction
AUTHOR AFFIL	Mathematics and Computer Science Division; Argonne National Laboratory	user correction
AUTHOR ADDR	9700 S. Cass Avenue; Argonne, IL 60439	user correction
AUTHOR NAME	William Gropp	user correction
ABSTRACT	Many large-scale applications on parallel machines are bottlenecked by the I/O performance rather than the CPU or communication performance of the system. To improve the I/O performance, it is first necessary for system designers to understand the I/O requirements of various applications. This paper presents the results of a study of the I/O characteristics and performance of a real, I/O-intensive, portable, parallel application in astrophysics, on two different parallel machines---the IBM SP and the Intel Paragon. We instrumented the source code to record all I/O activity, and analyzed the resulting trace files. Our results show that, for this application, the I/O consists of fairly large writes, and writing data to files is faster on the Paragon, whereas opening and closing files are faster on the SP. We also discuss how the I/O performance of this application could be improved; particularly, we believe that this application would benefit from using collective I/O.	user correction
YEAR	1995	INFERENCE
VENUE TYPE	CONFERENCE	INFERENCE
TECH	Technical Report MCS-P534-0895	INFERENCE
CITATIONS	32 found	ParsCit 1.0