sll_m_compression Module Reference

Description

Module providing an F90 interface to the ZFP compression library: http://computation.llnl.gov/projects/floating-point-compression In addition it provides simple threaded (de)compression routines. Important: This module uses C-like 0-based indexing!

Author

Klaus Reuter, Max Planck Computing and Data Facility (MPCDF)

Derived types and interfaces
type	sll_t_compressed_buffer
	data structure to support threaded ZFP compression and decompression More...

Functions/Subroutines
subroutine	deflate_buffer_real64 (buf, comp, n_doubles, n_threads)
	compress buffer More...
subroutine	inflate_buffer_real64 (buf, comp, n_threads)
	decompress buffer More...
subroutine	deallocate_compressed_buffer_obj (comp)
subroutine	allocate_compressed_buffer_index_arrays (comp, n_slices)
subroutine	print_compression_information (comp, verbose)
subroutine	set_compression_precision (prec)
integer function	concatenate_index_arrays (comp, array)
	allocate array, copy indices from comp into array, return More...
subroutine	decatenate_index_arrays (comp, array)
double precision function	get_time ()

Variables
integer, parameter	zfp_blocksize = 64
integer	zfp_precision = 32

---

Data Type Documentation

sll_m_compression::sll_t_compressed_buffer

type sll_m_compression::sll_t_compressed_buffer

data structure to support threaded ZFP compression and decompression

Definition at line 65 of file sll_m_compression.F90.

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Class Members
character, dimension(:), pointer	buffer
integer, dimension(:), pointer	n_bytes_deflated
integer	n_bytes_deflated_total
integer, dimension(:), pointer	n_bytes_inflated
integer	n_bytes_inflated_total
integer	n_slices
integer, dimension(:), pointer	offset_deflated
integer, dimension(:), pointer	offset_inflated

Function/Subroutine Documentation

allocate_compressed_buffer_index_arrays()

subroutine sll_m_compression::allocate_compressed_buffer_index_arrays	(	type(sll_t_compressed_buffer), intent(inout)	comp,
		integer, intent(in)	n_slices
	)

Definition at line 254 of file sll_m_compression.F90.

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concatenate_index_arrays()

integer function sll_m_compression::concatenate_index_arrays	(	type(sll_t_compressed_buffer)	comp,
		integer, dimension(:), pointer	array
	)

allocate array, copy indices from comp into array, return

Definition at line 296 of file sll_m_compression.F90.

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deallocate_compressed_buffer_obj()

subroutine sll_m_compression::deallocate_compressed_buffer_obj

(

type(sll_t_compressed_buffer), intent(inout)

comp

)

Definition at line 231 of file sll_m_compression.F90.

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decatenate_index_arrays()

subroutine sll_m_compression::decatenate_index_arrays	(	type(sll_t_compressed_buffer)	comp,
		integer, dimension(:), pointer	array
	)

Definition at line 330 of file sll_m_compression.F90.

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deflate_buffer_real64()

subroutine sll_m_compression::deflate_buffer_real64	(	real(kind=f64), dimension(0:), intent(in), target	buf,
		type(sll_t_compressed_buffer), intent(inout)	comp,
		integer, intent(in), optional	n_doubles,
		integer, intent(in), optional	n_threads
	)

compress buffer

Definition at line 88 of file sll_m_compression.F90.

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get_time()

double precision function sll_m_compression::get_time

Definition at line 362 of file sll_m_compression.F90.

inflate_buffer_real64()

subroutine sll_m_compression::inflate_buffer_real64	(	real(kind=f64), dimension(0:), intent(inout), target	buf,
		type(sll_t_compressed_buffer), intent(inout)	comp,
		integer, intent(in), optional	n_threads
	)

decompress buffer

Definition at line 180 of file sll_m_compression.F90.

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print_compression_information()

subroutine sll_m_compression::print_compression_information	(	type(sll_t_compressed_buffer), intent(in)	comp,
		logical, intent(in), optional	verbose
	)

Definition at line 265 of file sll_m_compression.F90.

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set_compression_precision()

subroutine sll_m_compression::set_compression_precision

(

integer, intent(in)

prec

)

Definition at line 289 of file sll_m_compression.F90.

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Variable Documentation

zfp_blocksize

integer, parameter zfp_blocksize = 64

Definition at line 61 of file sll_m_compression.F90.

zfp_precision

integer zfp_precision = 32

Definition at line 62 of file sll_m_compression.F90.