With parallel file I/O we are faced with the situation that we do not have appropriate tools to get an insight into the I/O server behavior depending on the I/O calls in the corresponding parallel MPI program. We present an approach that allows us to also get event traces from the I/O server environment and to merge them with the client trace. Corresponding events will be matched and visualized. We integrate this functionality into the parallel file system PVFS2 and the MPICH2 tool Jumpshot. Keywords: Performance Analyzer, Parallel I/O, Visualization, Trace-based Tools, PVFS2.

@inproceedings{TTMCDALKKP06,
	author	 = {Thomas Ludwig and Stephan Krempel and Julian Kunkel and Frank Panse and Dulip Withanage},
	title	 = {{Tracing the MPI-IO Calls' Disk Accesses}},
	year	 = {2006},
	booktitle	 = {{Recent Advances in Parallel Virtual Machine and Message Passing Interface}},
	editor	 = {Bernd Mohr and Jesper Larsson Träff and Joachim Worringen and Jack Dongarra},
	publisher	 = {Springer},
	address	 = {Berlin / Heidelberg, Germany},
	series	 = {Lecture Notes in Computer Science},
	number	 = {4192},
	pages	 = {322--330},
	conference	 = {EuroPVM/MPI-06},
	organization	 = {C\&C Research Labs, NEC Europe Ltd., and the Research Centre Jülich},
	location	 = {Bonn, Germany},
	isbn	 = {3-540-39110-X},
	doi	 = {http://dx.doi.org/10.1007/11846802_45},
	abstract	 = {With parallel file I/O we are faced with the situation that we do not have appropriate tools to get an insight into the I/O server behavior depending on the I/O calls in the corresponding parallel MPI program. We present an approach that allows us to also get event traces from the I/O server environment and to merge them with the client trace. Corresponding events will be matched and visualized. We integrate this functionality into the parallel file system PVFS2 and the MPICH2 tool Jumpshot. Keywords: Performance Analyzer, Parallel I/O, Visualization, Trace-based Tools, PVFS2.},
	url	 = {http://www.springerlink.com/content/537j28201153t3n7/fulltext.pdf},
}