lama::_StorageIO Class Reference

This class provides static utility methods for splitting matrix storage into a local and a halo part. More...

#include <StorageIO.hpp>

Inheritance diagram for lama::_StorageIO:

Static Public Member Functions
static void	writeCSRHeader (const IndexType numRows, const IndexType numValues, const File::FileType &fileType, const std::string &fileName, const PartitionId size, const PartitionId rank)
	This method writes a header file for a CSR storage.
static void	readCSRHeader (IndexType &numRows, IndexType &numColumns, IndexType &numValues, PartitionId &size, PartitionId &rank, File::FileType &fileType, const std::string &fileName)
static size_t	getIndexDataTypeSize (const File::IndexDataType indexDataType)
Protected Member Functions
	LAMA_LOG_DECL_STATIC_LOGGER (logger)
	logger for Storage IO
Static Private Attributes
static const int	mIversion = 4

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Detailed Description

This class provides static utility methods for splitting matrix storage into a local and a halo part.

Due to a column distribution the storage is divided into a local part (having the local columns) and a halo part (for the non-local columns). Furthermore, it builds the halo for exchanging the non-local values between processors.

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Member Function Documentation

size_t lama::_StorageIO::getIndexDataTypeSize

(

const File::IndexDataType

indexDataType

)

[static]

References lama::File::INT, LAMA_THROWEXCEPTION, and lama::File::LONG.

lama::_StorageIO::LAMA_LOG_DECL_STATIC_LOGGER

(

logger

)

[protected]

logger for Storage IO

void lama::_StorageIO::readCSRHeader	(	IndexType &	numRows,
		IndexType &	numColumns,
		IndexType &	numValues,
		PartitionId &	size,
		PartitionId &	rank,
		File::FileType &	fileType,
		const std::string &	fileName
	)		[static]

References lama::File::BINARY, lama::File::FORMATTED, LAMA_THROWEXCEPTION, mIversion, and lama::File::XDR.

void lama::_StorageIO::writeCSRHeader	(	const IndexType	numRows,
		const IndexType	numValues,
		const File::FileType &	fileType,
		const std::string &	fileName,
		const PartitionId	size,
		const PartitionId	rank
	)		[static]

This method writes a header file for a CSR storage.

Parameters:

[in]	numRows	is number of rows of the storage
[in]	numValues	is number of values of the storage
[in]	fileType	specifies the type of representation (e.g. binary)
[in]	filename	is the name of the header file to write
[in]	size	stands for number of partitions, is CSR storage is part of a distributed matrix
[in]	rank	stands for the rank of the partition.

Note: for distributed CSR matrices each partition has its own header file. #row and #non-zero values are the values for each local part.

References lama::File::BINARY, lama::File::FORMATTED, LAMA_THROWEXCEPTION, mIversion, VERSION_ID, and lama::File::XDR.

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Field Documentation

const int lama::_StorageIO::mIversion = 4 [static, private]

Referenced by readCSRHeader(), and writeCSRHeader().

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The documentation for this class was generated from the following files:

• /home/brandes/workspace/LAMA/src/lama/StorageIO.hpp
• /home/brandes/workspace/LAMA/src/lama/StorageIO.cpp