A cache when reading files over the network.

A caching system to speed up network I/O, i.e. when there is no operating system caching support (like the buffer cache for local disk I/O). The cache makes sure that every I/O is done with a (large) fixed length buffer thereby avoiding many small I/O's. Currently the read cache system is used by the classes TNetFile, TXNetFile and TWebFile (via TFile::ReadBuffers()). When processing TTree, TChain, a specialized class TTreeCache that derives from this class is automatically created.

Definition at line 26 of file TFileCacheRead.h.

Public Member Functions
	TFileCacheRead ()

	TFileCacheRead (TFile file, Int_t buffersize, TObject tree=0)
	Creates a TFileCacheRead data structure. More...

virtual	~TFileCacheRead ()
	Destructor. More...

virtual Int_t	AddBranch (TBranch *, Bool_t=kFALSE)

virtual Int_t	AddBranch (const char *, Bool_t=kFALSE)

virtual void	AddNoCacheBytesRead (Long64_t len)

virtual void	AddNoCacheReadCalls (Int_t reads)

virtual void	Close (Option_t *option="")
	Close out any threads or asynchronous fetches used by the underlying implementation. More...

virtual Int_t	GetBufferSize () const

virtual Long64_t	GetBytesRead () const

virtual Long64_t	GetNoCacheBytesRead () const

virtual Long64_t	GetBytesReadExtra () const

TFile *	GetFile () const

Int_t	GetNseek () const

Int_t	GetNtot () const

virtual Int_t	GetReadCalls () const

virtual Int_t	GetNoCacheReadCalls () const

virtual Int_t	GetUnzipBuffer (char *, Long64_t, Int_t, Bool_t )

Long64_t	GetPrefetchedBlocks () const

virtual Bool_t	IsAsyncReading () const

virtual void	SetEnablePrefetching (Bool_t setPrefetching=kFALSE)
	Set the prefetching mode of this file. More...

virtual Bool_t	IsEnablePrefetching () const

virtual Bool_t	IsLearning () const

virtual void	Prefetch (Long64_t pos, Int_t len)
	Add block of length len at position pos in the list of blocks to be prefetched. More...

virtual void	Print (Option_t *option="") const
	Print cache statistics. More...

virtual Int_t	ReadBufferExt (char *buf, Long64_t pos, Int_t len, Int_t &loc)

virtual Int_t	ReadBufferExtNormal (char *buf, Long64_t pos, Int_t len, Int_t &loc)
	Base function for ReadBuffer. More...

virtual Int_t	ReadBufferExtPrefetch (char *buf, Long64_t pos, Int_t len, Int_t &loc)
	prefetch the first block More...

virtual Int_t	ReadBuffer (char *buf, Long64_t pos, Int_t len)
	Read buffer at position pos. More...

virtual Int_t	SetBufferSize (Int_t buffersize)
	Sets the buffer size. More...

virtual void	SetFile (TFile *file, TFile::ECacheAction action=TFile::kDisconnect)
	Set the file using this cache and reset the current blocks (if any). More...

virtual void	SetSkipZip (Bool_t=kTRUE)

virtual void	Sort ()
	Sort buffers to be prefetched in increasing order of positions. More...

virtual void	SecondSort ()
	Sort buffers to be prefetched in increasing order of positions. More...

virtual void	SecondPrefetch (Long64_t, Int_t)

virtual TFilePrefetch *	GetPrefetchObj ()

virtual void	WaitFinishPrefetch ()

Public Member Functions inherited from TObject
	TObject ()

	TObject (const TObject &object)
	TObject copy ctor. More...

TObject &	operator= (const TObject &rhs)
	TObject assignment operator. More...

virtual	~TObject ()
	TObject destructor. More...

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...

virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...

virtual void	Clear (Option_t *="")

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method. More...

virtual void	Copy (TObject &object) const
	Copy this to obj. More...

virtual void	Delete (Option_t *option="")
	Delete this object. More...

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object. More...

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current pad. More...

virtual void	Dump () const
	Dump contents of object on stdout. More...

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py). More...

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...

virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...

virtual const char *	GetName () const
	Returns name of object. More...

virtual const char *	GetIconName () const
	Returns mime type name of object. More...

virtual Option_t *	GetOption () const

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...

virtual const char *	GetTitle () const
	Returns title of object. More...

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...

virtual ULong_t	Hash () const
	Return hash value for this object. More...

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...

virtual Bool_t	IsSortable () const

Bool_t	IsOnHeap () const

Bool_t	IsZombie () const

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...

virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout. More...

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself. More...

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list. More...

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename. More...

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out". More...

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...

virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...

void *	operator new (size_t sz)

void *	operator new[] (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz, void *vp)

void	operator delete (void *ptr)
	Operator delete. More...

void	operator delete[] (void *ptr)
	Operator delete []. More...

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...

void	SetBit (UInt_t f)

void	ResetBit (UInt_t f)

Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

void	InvertBit (UInt_t f)

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message. More...

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message. More...

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message. More...

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message. More...

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message. More...

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...

Protected Member Functions
void	SetEnablePrefetchingImpl (Bool_t setPrefetching=kFALSE)
	TFileCacheRead implementation of SetEnablePrefetching. More...

Protected Member Functions inherited from TObject
void	MakeZombie ()

virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected). More...

Protected Attributes
TFilePrefetch *	fPrefetch
	! Object that does the asynchronous reading in another thread More...

Int_t	fBufferSizeMin
	Original size of fBuffer. More...

Int_t	fBufferSize
	Allocated size of fBuffer (at a given time) More...

Int_t	fBufferLen
	Current buffer length (<= fBufferSize) More...

Long64_t	fBytesRead
	Number of bytes read for this cache. More...

Long64_t	fBytesReadExtra
	Number of extra bytes (overhead) read by the readahead buffer. More...

Int_t	fReadCalls
	Number of read calls for this cache. More...

Long64_t	fNoCacheBytesRead
	Number of bytes read by basket to fill cached tree. More...

Int_t	fNoCacheReadCalls
	Number of read calls by basket to fill cached tree. More...

Bool_t	fAsyncReading

Bool_t	fEnablePrefetching
	reading by prefetching asynchronously More...

Int_t	fNseek
	Number of blocks to be prefetched. More...

Int_t	fNtot
	Total size of prefetched blocks. More...

Int_t	fNb
	Number of long buffers. More...

Int_t	fSeekSize
	Allocated size of fSeek. More...

Long64_t *	fSeek
	[fNseek] Position on file of buffers to be prefetched More...

Long64_t *	fSeekSort
	[fNseek] Position on file of buffers to be prefetched (sorted) More...

Int_t *	fSeekIndex
	[fNseek] sorted index table of fSeek More...

Long64_t *	fPos
	[fNb] start of long buffers More...

Int_t *	fSeekLen
	[fNseek] Length of buffers to be prefetched More...

Int_t *	fSeekSortLen
	[fNseek] Length of buffers to be prefetched (sorted) More...

Int_t *	fSeekPos
	[fNseek] Position of sorted blocks in fBuffer More...

Int_t *	fLen
	[fNb] Length of long buffers More...

TFile *	fFile
	Pointer to file. More...

char *	fBuffer
	[fBufferSize] buffer of contiguous prefetched blocks More...

Bool_t	fIsSorted
	True if fSeek array is sorted. More...

Bool_t	fIsTransferred
	True when fBuffer contains something valid. More...

Long64_t	fPrefetchedBlocks
	Number of blocks prefetched. More...

Int_t	fBNseek

Int_t	fBNtot

Int_t	fBNb

Int_t	fBSeekSize

Long64_t *	fBSeek
	[fBNseek] More...

Long64_t *	fBSeekSort
	[fBNseek] More...

Int_t *	fBSeekIndex
	[fBNseek] More...

Long64_t *	fBPos
	[fBNb] More...

Int_t *	fBSeekLen
	[fBNseek] More...

Int_t *	fBSeekSortLen
	[fBNseek] More...

Int_t *	fBSeekPos
	[fBNseek] More...

Int_t *	fBLen
	[fBNb] More...

Bool_t	fBIsSorted

Bool_t	fBIsTransferred

Private Member Functions
	TFileCacheRead (const TFileCacheRead &)

TFileCacheRead &	operator= (const TFileCacheRead &)

Additional Inherited Members
Public Types inherited from TObject
enum	EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }

enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...

static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

#include <TFileCacheRead.h>

Inheritance diagram for TFileCacheRead:

Collaboration diagram for TFileCacheRead:

Constructor & Destructor Documentation

TFileCacheRead::TFileCacheRead ( const TFileCacheRead & )

private

TFileCacheRead::TFileCacheRead ( )

TFileCacheRead::TFileCacheRead	(	TFile *	file,
		Int_t	buffersize,
		TObject *	tree = `0`
	)

Creates a TFileCacheRead data structure.

Definition at line 92 of file TFileCacheRead.cxx.

TFileCacheRead::~TFileCacheRead ( )

virtual

Destructor.

Definition at line 159 of file TFileCacheRead.cxx.

Member Function Documentation

virtual Int_t TFileCacheRead::AddBranch	(	TBranch *	,
		Bool_t	= `kFALSE`
	)

inlinevirtual

Reimplemented in TTreeCacheUnzip, and TTreeCache.

Definition at line 87 of file TFileCacheRead.h.

Referenced by TBranch::GetBasket().

virtual Int_t TFileCacheRead::AddBranch	(	const char *	,
		Bool_t	= `kFALSE`
	)

inlinevirtual

Reimplemented in TTreeCacheUnzip, and TTreeCache.

Definition at line 88 of file TFileCacheRead.h.

virtual void TFileCacheRead::AddNoCacheBytesRead ( Long64_t len )

inlinevirtual

Definition at line 89 of file TFileCacheRead.h.

Referenced by TBasket::LoadBasketBuffers(), and TBasket::ReadBasketBuffers().

virtual void TFileCacheRead::AddNoCacheReadCalls ( Int_t reads )

inlinevirtual

Definition at line 90 of file TFileCacheRead.h.

Referenced by TBasket::LoadBasketBuffers(), and TBasket::ReadBasketBuffers().

void TFileCacheRead::Close ( Option_t * option = "" )

virtual

Close out any threads or asynchronous fetches used by the underlying implementation.

This is called by TFile::Close to prevent usage of the file handles after the closing of the file.

Definition at line 188 of file TFileCacheRead.cxx.

Referenced by TFile::Close().

virtual Int_t TFileCacheRead::GetBufferSize ( ) const

inlinevirtual

Definition at line 92 of file TFileCacheRead.h.

Referenced by TTreeCloner::FillCache(), TFile::GetBytesToPrefetch(), TTree::TClusterIterator::GetEstimatedClusterSize(), TTreeCacheUnzip::Init(), TTreeCache::SetBufferSize(), TTreeCacheUnzip::SetBufferSize(), TTreeCloner::SetCacheSize(), and TTree::SetCacheSizeAux().

virtual Long64_t TFileCacheRead::GetBytesRead ( ) const

inlinevirtual

Definition at line 93 of file TFileCacheRead.h.

Referenced by Print().

virtual Long64_t TFileCacheRead::GetBytesReadExtra ( ) const

inlinevirtual

Definition at line 95 of file TFileCacheRead.h.

Referenced by Print().

TFile* TFileCacheRead::GetFile ( ) const

inline

Definition at line 96 of file TFileCacheRead.h.

Referenced by TFile::SetCacheRead().

virtual Long64_t TFileCacheRead::GetNoCacheBytesRead ( ) const

inlinevirtual

Definition at line 94 of file TFileCacheRead.h.

Referenced by Print().

virtual Int_t TFileCacheRead::GetNoCacheReadCalls ( ) const

inlinevirtual

Definition at line 100 of file TFileCacheRead.h.

Referenced by Print().

Int_t TFileCacheRead::GetNseek ( ) const

inline

Definition at line 97 of file TFileCacheRead.h.

Int_t TFileCacheRead::GetNtot ( ) const

inline

Definition at line 98 of file TFileCacheRead.h.

Long64_t TFileCacheRead::GetPrefetchedBlocks ( ) const

inline

Definition at line 102 of file TFileCacheRead.h.

TFilePrefetch * TFileCacheRead::GetPrefetchObj ( )

virtual

Definition at line 683 of file TFileCacheRead.cxx.

virtual Int_t TFileCacheRead::GetReadCalls ( ) const

inlinevirtual

Definition at line 99 of file TFileCacheRead.h.

Referenced by Print().

virtual Int_t TFileCacheRead::GetUnzipBuffer	(	char **	,
		Long64_t	,
		Int_t	,
		Bool_t *
	)

inlinevirtual

Reimplemented in TTreeCacheUnzip.

Definition at line 101 of file TFileCacheRead.h.

Referenced by TBasket::ReadBasketBuffers().

virtual Bool_t TFileCacheRead::IsAsyncReading ( ) const

inlinevirtual

Definition at line 103 of file TFileCacheRead.h.

virtual Bool_t TFileCacheRead::IsEnablePrefetching ( ) const

inlinevirtual

Definition at line 105 of file TFileCacheRead.h.

virtual Bool_t TFileCacheRead::IsLearning ( ) const

inlinevirtual

Reimplemented in TTreeCache.

Definition at line 106 of file TFileCacheRead.h.

Referenced by TBranch::GetBasket().

TFileCacheRead& TFileCacheRead::operator= ( const TFileCacheRead & )

private

void TFileCacheRead::Prefetch	(	Long64_t	pos,
		Int_t	len
	)

virtual

Add block of length len at position pos in the list of blocks to be prefetched.

If pos <= 0 the current blocks (if any) are reset.

Definition at line 201 of file TFileCacheRead.cxx.

Referenced by TTreeCache::FillBuffer(), TTreeCacheUnzip::FillBuffer(), TTreeCloner::FillCache(), TTreeCache::ResetCache(), TTreeCache::SetBufferSize(), SetBufferSize(), and SetFile().

void TFileCacheRead::Print ( Option_t * option = "" ) const

virtual

Print cache statistics.

The format is: ******TreeCache statistics for file: cms2.root ****** Reading............................: 72761843 bytes in 7 transactions Readahead..........................: 256000 bytes with overhead = 0 bytes Average transaction................: 10394.549000 Kbytes Number of blocks in current cache..: 210, total size: 6280352

If option = "a" the list of blocks in the cache is printed NB: this function is automatically called by TTreeCache::Print

Reimplemented from TObject.

Reimplemented in TTreeCacheUnzip, and TTreeCache.

Definition at line 325 of file TFileCacheRead.cxx.

Referenced by TTreeCache::Print().

Int_t TFileCacheRead::ReadBuffer	(	char *	buf,
		Long64_t	pos,
		Int_t	len
	)

virtual

Read buffer at position pos.

If pos is in the list of prefetched blocks read from fBuffer, otherwise need to make a normal read from file. Returns -1 in case of read error, 0 in case not in cache, 1 in case read from cache.

Reimplemented in TTreeCache.

Definition at line 363 of file TFileCacheRead.cxx.

Referenced by TBasket::LoadBasketBuffers(), TBasket::ReadBasketBuffers(), TTreeCache::ReadBufferNormal(), TTreeCache::ReadBufferPrefetch(), and TFile::ReadBufferViaCache().

Int_t TFileCacheRead::ReadBufferExt	(	char *	buf,
		Long64_t	pos,
		Int_t	len,
		Int_t &	loc
	)

virtual

Reimplemented in TTreeCacheUnzip.

Definition at line 381 of file TFileCacheRead.cxx.

Referenced by ReadBuffer(), and TTreeCacheUnzip::ReadBufferExt().

Int_t TFileCacheRead::ReadBufferExtNormal	(	char *	buf,
		Long64_t	pos,
		Int_t	len,
		Int_t &	loc
	)

virtual

Base function for ReadBuffer.

Also gives out the position of the block in the internal buffer. This helps TTreeCacheUnzip to avoid doing twice the binary search.

Definition at line 453 of file TFileCacheRead.cxx.

Referenced by ReadBufferExt().

Int_t TFileCacheRead::ReadBufferExtPrefetch	(	char *	buf,
		Long64_t	pos,
		Int_t	len,
		Int_t &	loc
	)

virtual

prefetch the first block

Definition at line 393 of file TFileCacheRead.cxx.

Referenced by ReadBufferExt().

void TFileCacheRead::SecondPrefetch	(	Long64_t	pos,
		Int_t	len
	)

virtual

Definition at line 258 of file TFileCacheRead.cxx.

Referenced by TTreeCache::FillBuffer(), TTreeCache::ResetCache(), TTreeCache::SetBufferSize(), SetBufferSize(), and SetFile().

void TFileCacheRead::SecondSort ( )

virtual

Sort buffers to be prefetched in increasing order of positions.

Merge consecutive blocks if necessary.

Definition at line 629 of file TFileCacheRead.cxx.

Referenced by ReadBufferExtPrefetch().

Int_t TFileCacheRead::SetBufferSize ( Int_t buffersize )

virtual

Sets the buffer size.

If the current prefetch list is too large to fit in the new buffer some or all of the prefetch blocks are dropped. The requested buffersize must be greater than zero. Return values:

0 if the prefetch block lists remain unchanged
1 if some or all blocks have been removed from the prefetch list
-1 on error

Reimplemented in TTreeCacheUnzip, and TTreeCache.

Definition at line 709 of file TFileCacheRead.cxx.

Referenced by TTreeCache::SetBufferSize().

void TFileCacheRead::SetEnablePrefetching ( Bool_t setPrefetching = kFALSE )

virtual

Set the prefetching mode of this file.

If 'setPrefetching', enable the asynchronous prefetching (using TFilePrefetch) and if the gEnv and rootrc variable Cache.Directory is set, also enable the local caching of the prefetched blocks. if 'setPrefetching', the old prefetcher is enabled is the gEnv and rootrc variable is TFile.AsyncReading

Definition at line 771 of file TFileCacheRead.cxx.

void TFileCacheRead::SetEnablePrefetchingImpl ( Bool_t setPrefetching = kFALSE )

protected

TFileCacheRead implementation of SetEnablePrefetching.

This function is called from the constructor and should not be virtual.

Definition at line 781 of file TFileCacheRead.cxx.

Referenced by SetEnablePrefetching(), and TFileCacheRead().

void TFileCacheRead::SetFile	(	TFile *	file,
		TFile::ECacheAction	action = `TFile::kDisconnect`
	)

virtual

Set the file using this cache and reset the current blocks (if any).

Reimplemented in TTreeCache.

Definition at line 544 of file TFileCacheRead.cxx.

Referenced by TFile::SetCacheRead(), and TTreeCache::SetFile().

virtual void TFileCacheRead::SetSkipZip ( Bool_t = kTRUE )

inlinevirtual

Definition at line 115 of file TFileCacheRead.h.

Referenced by TBranch::GetBasket().

void TFileCacheRead::Sort ( )

virtual

Sort buffers to be prefetched in increasing order of positions.

Merge consecutive blocks if necessary.

Definition at line 571 of file TFileCacheRead.cxx.

Referenced by ReadBufferExtNormal(), and ReadBufferExtPrefetch().

void TFileCacheRead::WaitFinishPrefetch ( )

virtual

Definition at line 690 of file TFileCacheRead.cxx.

Referenced by TTree::MoveReadCache(), and TTree::SetCacheSizeAux().

Member Data Documentation

Bool_t TFileCacheRead::fAsyncReading

protected

Definition at line 40 of file TFileCacheRead.h.

Referenced by IsAsyncReading(), ReadBufferExtNormal(), SecondSort(), SetBufferSize(), SetEnablePrefetchingImpl(), SetFile(), and Sort().

Bool_t TFileCacheRead::fBIsSorted

protected

Definition at line 74 of file TFileCacheRead.h.

Referenced by ReadBufferExtPrefetch(), SecondPrefetch(), SecondSort(), and TFileCacheRead().

Bool_t TFileCacheRead::fBIsTransferred

protected

Definition at line 75 of file TFileCacheRead.h.

Referenced by TFileCacheRead().

Int_t* TFileCacheRead::fBLen

protected

[fBNb]

Definition at line 73 of file TFileCacheRead.h.

Referenced by ReadBufferExtPrefetch(), SecondPrefetch(), SecondSort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t TFileCacheRead::fBNb

protected

Definition at line 64 of file TFileCacheRead.h.

Referenced by ReadBufferExtPrefetch(), SecondSort(), and TFileCacheRead().

Int_t TFileCacheRead::fBNseek

protected

Definition at line 62 of file TFileCacheRead.h.

Referenced by ReadBufferExtPrefetch(), SecondPrefetch(), SecondSort(), and TFileCacheRead().

Int_t TFileCacheRead::fBNtot

protected

Definition at line 63 of file TFileCacheRead.h.

Referenced by TTreeCache::FillBuffer(), SecondPrefetch(), SecondSort(), SetBufferSize(), and TFileCacheRead().

Long64_t* TFileCacheRead::fBPos

protected

[fBNb]

Definition at line 69 of file TFileCacheRead.h.

Referenced by ReadBufferExtPrefetch(), SecondPrefetch(), SecondSort(), TFileCacheRead(), and ~TFileCacheRead().

Long64_t* TFileCacheRead::fBSeek

protected

[fBNseek]

Definition at line 66 of file TFileCacheRead.h.

Referenced by SecondPrefetch(), SecondSort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t* TFileCacheRead::fBSeekIndex

protected

[fBNseek]

Definition at line 68 of file TFileCacheRead.h.

Referenced by SecondPrefetch(), SecondSort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t* TFileCacheRead::fBSeekLen

protected

[fBNseek]

Definition at line 70 of file TFileCacheRead.h.

Referenced by SecondPrefetch(), SecondSort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t* TFileCacheRead::fBSeekPos

protected

[fBNseek]

Definition at line 72 of file TFileCacheRead.h.

Referenced by SecondPrefetch(), SecondSort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t TFileCacheRead::fBSeekSize

protected

Definition at line 65 of file TFileCacheRead.h.

Referenced by SecondPrefetch(), and TFileCacheRead().

Long64_t* TFileCacheRead::fBSeekSort

protected

[fBNseek]

Definition at line 67 of file TFileCacheRead.h.

Referenced by ReadBufferExtPrefetch(), SecondPrefetch(), SecondSort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t* TFileCacheRead::fBSeekSortLen

protected

[fBNseek]

Definition at line 71 of file TFileCacheRead.h.

Referenced by SecondPrefetch(), SecondSort(), TFileCacheRead(), and ~TFileCacheRead().

char* TFileCacheRead::fBuffer

protected

[fBufferSize] buffer of contiguous prefetched blocks

Definition at line 56 of file TFileCacheRead.h.

Referenced by ReadBufferExtNormal(), SecondSort(), SetBufferSize(), SetEnablePrefetchingImpl(), SetFile(), Sort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t TFileCacheRead::fBufferLen

protected

Current buffer length (<= fBufferSize)

Definition at line 32 of file TFileCacheRead.h.

Referenced by TFileCacheRead().

Int_t TFileCacheRead::fBufferSize

protected

Allocated size of fBuffer (at a given time)

Definition at line 31 of file TFileCacheRead.h.

Referenced by GetBufferSize(), SecondSort(), SetBufferSize(), SetEnablePrefetchingImpl(), SetFile(), Sort(), and TFileCacheRead().

Int_t TFileCacheRead::fBufferSizeMin

protected

Original size of fBuffer.

Definition at line 30 of file TFileCacheRead.h.

Referenced by TTreeCache::FillBuffer(), SecondSort(), SetBufferSize(), Sort(), and TFileCacheRead().

Long64_t TFileCacheRead::fBytesRead

protected

Number of bytes read for this cache.

Definition at line 34 of file TFileCacheRead.h.

Referenced by GetBytesRead(), ReadBuffer(), and TFileCacheRead().

Long64_t TFileCacheRead::fBytesReadExtra

protected

Number of extra bytes (overhead) read by the readahead buffer.

Definition at line 35 of file TFileCacheRead.h.

Referenced by GetBytesReadExtra(), ReadBuffer(), and TFileCacheRead().

Bool_t TFileCacheRead::fEnablePrefetching

protected

reading by prefetching asynchronously

Definition at line 41 of file TFileCacheRead.h.

Referenced by TTreeCache::FillBuffer(), IsEnablePrefetching(), TTreeCache::ReadBuffer(), ReadBufferExt(), TTreeCache::ResetCache(), TTreeCache::SetBufferSize(), SetBufferSize(), SetEnablePrefetchingImpl(), TTreeCache::StopLearningPhase(), TFileCacheRead(), and WaitFinishPrefetch().

TFile* TFileCacheRead::fFile

protected

Pointer to file.

Definition at line 55 of file TFileCacheRead.h.

Referenced by TTreeCache::FillBuffer(), TTreeCacheUnzip::FillBuffer(), GetFile(), TTreeCacheUnzip::GetUnzipBuffer(), TTreeCacheUnzip::Init(), TTreeCache::Print(), TTreeCacheUnzip::Print(), ReadBuffer(), ReadBufferExtNormal(), ReadBufferExtPrefetch(), SetEnablePrefetchingImpl(), TTreeCache::SetFile(), SetFile(), TFileCacheRead(), TTreeCacheUnzip::UnzipBuffer(), and TTreeCache::~TTreeCache().

Bool_t TFileCacheRead::fIsSorted

protected

True if fSeek array is sorted.

Definition at line 57 of file TFileCacheRead.h.

Referenced by Prefetch(), Print(), ReadBufferExtNormal(), ReadBufferExtPrefetch(), Sort(), and TFileCacheRead().

Bool_t TFileCacheRead::fIsTransferred

protected

True when fBuffer contains something valid.

Definition at line 58 of file TFileCacheRead.h.

Referenced by TTreeCacheUnzip::FillBuffer(), TTreeCacheUnzip::GetUnzipBuffer(), Prefetch(), ReadBufferExtNormal(), ReadBufferExtPrefetch(), SetBufferSize(), TTreeCache::StartLearningPhase(), TFileCacheRead(), TTreeCacheUnzip::UnzipCache(), and TTreeCacheUnzip::UnzipLoop().

Int_t* TFileCacheRead::fLen

protected

[fNb] Length of long buffers

Definition at line 54 of file TFileCacheRead.h.

Referenced by Prefetch(), Print(), ReadBufferExtNormal(), ReadBufferExtPrefetch(), Sort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t TFileCacheRead::fNb

protected

Number of long buffers.

Definition at line 45 of file TFileCacheRead.h.

Referenced by Print(), ReadBufferExtNormal(), ReadBufferExtPrefetch(), Sort(), and TFileCacheRead().

Long64_t TFileCacheRead::fNoCacheBytesRead

protected

Number of bytes read by basket to fill cached tree.

Definition at line 37 of file TFileCacheRead.h.

Referenced by GetNoCacheBytesRead(), and TFileCacheRead().

Int_t TFileCacheRead::fNoCacheReadCalls

protected

Number of read calls by basket to fill cached tree.

Definition at line 38 of file TFileCacheRead.h.

Referenced by GetNoCacheReadCalls(), and TFileCacheRead().

Int_t TFileCacheRead::fNseek

protected

Number of blocks to be prefetched.

Definition at line 43 of file TFileCacheRead.h.

Referenced by TTreeCache::FillBuffer(), TTreeCacheUnzip::FillBuffer(), GetNseek(), TTreeCacheUnzip::GetUnzipBuffer(), Prefetch(), Print(), ReadBufferExtNormal(), ReadBufferExtPrefetch(), TTreeCacheUnzip::ResetCache(), Sort(), TFileCacheRead(), TTreeCacheUnzip::UnzipCache(), and TTreeCacheUnzip::UnzipLoop().

Int_t TFileCacheRead::fNtot

protected

Total size of prefetched blocks.

Definition at line 44 of file TFileCacheRead.h.

Referenced by TTreeCache::FillBuffer(), TTreeCacheUnzip::FillBuffer(), GetNtot(), Prefetch(), Print(), SetBufferSize(), Sort(), and TFileCacheRead().

Long64_t* TFileCacheRead::fPos

protected

[fNb] start of long buffers

Definition at line 50 of file TFileCacheRead.h.

Referenced by Prefetch(), Print(), ReadBufferExtNormal(), ReadBufferExtPrefetch(), Sort(), TFileCacheRead(), and ~TFileCacheRead().

TFilePrefetch* TFileCacheRead::fPrefetch

protected

! Object that does the asynchronous reading in another thread

Definition at line 29 of file TFileCacheRead.h.

Referenced by Close(), GetPrefetchObj(), Print(), ReadBufferExtPrefetch(), SetEnablePrefetchingImpl(), SetFile(), TFileCacheRead(), WaitFinishPrefetch(), and ~TFileCacheRead().

Long64_t TFileCacheRead::fPrefetchedBlocks

protected

Number of blocks prefetched.

Definition at line 59 of file TFileCacheRead.h.

Referenced by GetPrefetchedBlocks(), Print(), ReadBufferExtPrefetch(), and TFileCacheRead().

Int_t TFileCacheRead::fReadCalls

protected

Number of read calls for this cache.

Definition at line 36 of file TFileCacheRead.h.

Referenced by GetReadCalls(), ReadBuffer(), and TFileCacheRead().

Long64_t* TFileCacheRead::fSeek

protected

[fNseek] Position on file of buffers to be prefetched

Definition at line 47 of file TFileCacheRead.h.

Referenced by Prefetch(), Print(), Sort(), TFileCacheRead(), TTreeCacheUnzip::UnzipCache(), and ~TFileCacheRead().

Int_t* TFileCacheRead::fSeekIndex

protected

[fNseek] sorted index table of fSeek

Definition at line 49 of file TFileCacheRead.h.

Referenced by TTreeCacheUnzip::GetUnzipBuffer(), Prefetch(), Sort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t* TFileCacheRead::fSeekLen

protected

[fNseek] Length of buffers to be prefetched

Definition at line 51 of file TFileCacheRead.h.

Referenced by Prefetch(), Print(), ReadBufferExtNormal(), Sort(), TFileCacheRead(), TTreeCacheUnzip::UnzipCache(), and ~TFileCacheRead().

Int_t* TFileCacheRead::fSeekPos

protected

[fNseek] Position of sorted blocks in fBuffer

Definition at line 53 of file TFileCacheRead.h.

Referenced by Prefetch(), ReadBufferExtNormal(), Sort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t TFileCacheRead::fSeekSize

protected

Allocated size of fSeek.

Definition at line 46 of file TFileCacheRead.h.

Referenced by Prefetch(), and TFileCacheRead().

Long64_t* TFileCacheRead::fSeekSort

protected

[fNseek] Position on file of buffers to be prefetched (sorted)

Definition at line 48 of file TFileCacheRead.h.

Referenced by TTreeCacheUnzip::GetUnzipBuffer(), Prefetch(), Print(), ReadBufferExtNormal(), ReadBufferExtPrefetch(), Sort(), TFileCacheRead(), and ~TFileCacheRead().

Int_t* TFileCacheRead::fSeekSortLen

protected

[fNseek] Length of buffers to be prefetched (sorted)

Definition at line 52 of file TFileCacheRead.h.

Referenced by Prefetch(), Print(), Sort(), TFileCacheRead(), and ~TFileCacheRead().

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

io/io/inc/TFileCacheRead.h
io/io/src/TFileCacheRead.cxx

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