TPacketGenerator

class TPacketGenerator : public TObject

    private:

      TPacketGenerator TPacketGenerator()
      TPacketGenerator TPacketGenerator(const TPacketGenerator&)
                  void Init()
                  void operator=(const TPacketGenerator&)

    public:

      TPacketGenerator TPacketGenerator(Stat_t firstEntry, Stat_t lastEntry, TTree* tree, TList* slaves)
      TPacketGenerator TPacketGenerator(Stat_t firstEntry, Stat_t lastEntry, Int_t packetSize, TList* slaves)
          virtual void ~TPacketGenerator()
        static TClass* Class()
                Stat_t GetEntriesProcessed() const
                Stat_t GetEntriesProcessed(TSlave* sl) const
                 Int_t GetInitialPacketSize() const
                Stat_t GetLastEntry() const
                Stat_t GetNextEntry() const
                Bool_t GetNextPacket(TSlave* sl, Int_t& nentry, Stat_t& first)
                 Int_t GetNoPackets() const
                TList* GetPackets() const
       virtual TClass* IsA() const
          virtual void Print(Option_t* option) const
                  void Reset(Stat_t firstEntry, Stat_t lastEntry, TList* slaves)
                  void SetMinPacketSize(Int_t minps)
          virtual void ShowMembers(TMemberInspector& insp, char* parent)
          virtual void Streamer(TBuffer& b)
                  void StreamerNVirtual(TBuffer& b)

Data Members

    private:

          Stat_t fNextEntry          next entry to be processed
          Stat_t fLastEntry          last entry to be processed
          Stat_t fEntriesProcessed   number of entries processed
           Int_t fInitialPacketSize  initial packet size
           Int_t fMinPacketSize      minimum packet size
           Int_t fSmallestPacket     smallest packet generated
           TTime fMinTimeDiff        time difference between last two packets for fastest slave
           Int_t fMaxOrd             highest ordinal slave number
          TTree* fTree               tree or chain being processed
          TList* fSlaves             list of slaves
         Stat_t* fEntriesPerSlave    array containing number of entries processed per slave
      TObjArray* fLastPackets        pointer to the last packet for each slave
          TList* fPackets            list of packets that have been processed

Class Description

                                                                      
 TPacketGenerator                                                     
                                                                      
 This class generates packets to be processed on PROOF slave servers. 
 A packet is an entry range (begin entry and number of entries).      
 Packets are generated taking into account the performance of the     
 remote machine, the time it took to process a previous packet on     
 the remote machine, the locality of the database files, etc.         
                                                                      

 Private default ctor.

 Initialize TPacketGenerator using a TTree and a list of slave processors.

 Initialize TPacketGenerator using the total number of entries, the
 initial packet size and the list of slaves.

 TPacketGenerator dtor. Deletes the list of packets.

 Initialize the TPacketGenerator. Called by the ctors.

 Return number of entries processed by slave sl.

 Get next packet for slave sl. Returns kTRUE and sets first and nentry.
 In case no more packets return kFALSE (and set first and nentry == 0).
 The packet size for a slave is a linear function of the time diff between
 the processing of two packets relative to the fastest slave (i.e. the one
 with the smallest time diff). The fastest slave always processes
 packets of size fTree->GetPacketSize() (or of the size specified in
 the TPacketGenerator ctor).

 Number of packets generated.

 Prints info about the packet generator. If option is "all", print also
 info about all packets.

 Reset the packet generator for a new cycle.

 Set minimum packet size. The default is 20% of the initial packet size
 (in case of TTree's the initial packet size is set in via
 TTree::SetPacketSize() and its default is 100).

Inline Functions

                    void operator=(const TPacketGenerator&)
        TPacketGenerator TPacketGenerator(Stat_t firstEntry, Stat_t lastEntry, Int_t packetSize, TList* slaves)
                  Stat_t GetEntriesProcessed(TSlave* sl) const
                   Int_t GetInitialPacketSize() const
                  Stat_t GetNextEntry() const
                  TList* GetPackets() const
                  Stat_t GetLastEntry() const
                 TClass* Class()
                 TClass* IsA() const
                    void ShowMembers(TMemberInspector& insp, char* parent)
                    void Streamer(TBuffer& b)
                    void StreamerNVirtual(TBuffer& b)