ROOT  6.06/09
Reference Guide
Public Member Functions | Protected Member Functions | Protected Attributes | Private Member Functions | List of all members
TFileCacheRead Class Reference

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
 
TFileGetFile () 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 TFilePrefetchGetPrefetchObj ()
 
virtual void WaitFinishPrefetch ()
 
- Public Member Functions inherited from TObject
 TObject ()
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
TObjectoperator= (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 TObjectClone (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 TObjectDrawClone (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 TObjectFindObject (const char *name) const
 Must be redefined in derived classes. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes. More...
 
virtual Option_tGetDrawOption () 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_tGetOption () 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...
 
voidoperator new (size_t sz)
 
voidoperator new[] (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator 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

TFilePrefetchfPrefetch
 ! 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_tfSeek
 [fNseek] Position on file of buffers to be prefetched More...
 
Long64_tfSeekSort
 [fNseek] Position on file of buffers to be prefetched (sorted) More...
 
Int_tfSeekIndex
 [fNseek] sorted index table of fSeek More...
 
Long64_tfPos
 [fNb] start of long buffers More...
 
Int_tfSeekLen
 [fNseek] Length of buffers to be prefetched More...
 
Int_tfSeekSortLen
 [fNseek] Length of buffers to be prefetched (sorted) More...
 
Int_tfSeekPos
 [fNseek] Position of sorted blocks in fBuffer More...
 
Int_tfLen
 [fNb] Length of long buffers More...
 
TFilefFile
 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_tfBSeek
 [fBNseek] More...
 
Long64_tfBSeekSort
 [fBNseek] More...
 
Int_tfBSeekIndex
 [fBNseek] More...
 
Long64_tfBPos
 [fBNb] More...
 
Int_tfBSeekLen
 [fBNseek] More...
 
Int_tfBSeekSortLen
 [fBNseek] More...
 
Int_tfBSeekPos
 [fBNseek] More...
 
Int_tfBLen
 [fBNb] More...
 
Bool_t fBIsSorted
 
Bool_t fBIsTransferred
 

Private Member Functions

 TFileCacheRead (const TFileCacheRead &)
 
TFileCacheReadoperator= (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
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
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
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
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
Long64_t* TFileCacheRead::fBPos
protected
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
TFile* TFileCacheRead::fFile
protected
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
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
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: