| 1 |
utke |
1.1 |
MODULE revolve |
| 2 |
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IMPLICIT NONE |
| 3 |
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| 4 |
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PUBLIC :: rvInit, rvVerbose, rvNextAction, rvGuess, rvFactor, & |
| 5 |
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rvStore, rvRestore, rvForward, rvFirstUTurn, rvUTurn, rvDone, rvError |
| 6 |
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| 7 |
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PRIVATE :: & |
| 8 |
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ourSteps, ourACP, ourCStart, ourCEnd, ourVerbosity, & |
| 9 |
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ourNumFwd , ourNumInv, ourNumStore, ourRWCP, ourPrevCEnd, ourFirstUTurned, & |
| 10 |
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chkRange, forwdCount |
| 11 |
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| 12 |
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! possible actions |
| 13 |
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INTEGER, PARAMETER :: rvStore =1 |
| 14 |
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INTEGER, PARAMETER :: rvRestore =2 |
| 15 |
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INTEGER, PARAMETER :: rvForward =3 |
| 16 |
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INTEGER, PARAMETER :: rvFirstUTurn =4 |
| 17 |
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INTEGER, PARAMETER :: rvUTurn =5 |
| 18 |
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INTEGER, PARAMETER :: rvDone =6 |
| 19 |
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INTEGER, PARAMETER :: rvError =7 |
| 20 |
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| 21 |
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TYPE rvAction |
| 22 |
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INTEGER :: actionFlag = 0 |
| 23 |
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INTEGER :: iteration = 0 |
| 24 |
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INTEGER :: cpNum = 0 |
| 25 |
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CHARACTER, dimension(80) :: errorMsg |
| 26 |
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END TYPE rvAction |
| 27 |
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| 28 |
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INTEGER :: ourSteps = 0 ! number of steps |
| 29 |
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INTEGER :: ourACP = 0 ! allowed number of checkpoints |
| 30 |
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INTEGER :: ourCStart = 0 ! current subrange start |
| 31 |
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INTEGER :: ourCEnd = 0 ! current subrange end |
| 32 |
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INTEGER :: ourNumFwd = 0 ! count of forward steps |
| 33 |
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INTEGER :: ourNumInv = 0 ! count of invocations of rvNextAction |
| 34 |
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INTEGER :: ourNumStore = 0 ! number of stored checkpoints |
| 35 |
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INTEGER :: ourRWCP = -1! checkpoint currently (re)stored (first checkpoint is 0) |
| 36 |
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INTEGER :: ourPrevCEnd = 0 ! previous subrange end |
| 37 |
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LOGICAL :: ourFirstUturned = .FALSE. ! have we first for the first time |
| 38 |
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! vector of step numbers indexed by checkpoint |
| 39 |
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INTEGER, DIMENSION(:), ALLOCATABLE :: ourStepOf |
| 40 |
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| 41 |
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! for debugging purposes: |
| 42 |
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! 0 includes errors |
| 43 |
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! 1 includes summary info |
| 44 |
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! 2 includes iterations with checkpoints stored |
| 45 |
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! 3 includes all action results |
| 46 |
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INTEGER :: ourVerbosity = 0 |
| 47 |
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| 48 |
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CONTAINS |
| 49 |
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| 50 |
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!--------------------------------------------------------------------* |
| 51 |
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| 52 |
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FUNCTION rvInit(steps,checkpoints,errorMsg,anActionInstance) |
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IMPLICIT NONE |
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LOGICAL :: rvInit |
| 55 |
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INTEGER, INTENT(IN) :: steps |
| 56 |
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INTEGER, INTENT(IN) :: checkpoints |
| 57 |
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CHARACTER ,dimension(:), INTENT(OUT) :: errorMsg |
| 58 |
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type(rvAction), optional :: anActionInstance |
| 59 |
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INTEGER :: predFwdCnt ! predicted forward count |
| 60 |
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rvInit = .TRUE. |
| 61 |
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errorMsg ='none' |
| 62 |
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IF (present(anActionInstance)) THEN |
| 63 |
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! same as default init above |
| 64 |
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anActionInstance%actionFlag = 0 |
| 65 |
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anActionInstance%iteration = 0 |
| 66 |
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anActionInstance%cpNum = 0 |
| 67 |
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END IF |
| 68 |
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IF (steps<0 .OR. checkpoints<0) THEN |
| 69 |
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rvInit=.FALSE. |
| 70 |
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errorMsg = 'revolve::rvInit: negative steps or checkpoints' |
| 71 |
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ELSE |
| 72 |
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ourCStart = 0 |
| 73 |
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ourSteps = steps |
| 74 |
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ourCEnd = steps |
| 75 |
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ourACP = checkpoints |
| 76 |
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ourNumFwd = 0 |
| 77 |
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ourNumInv = 0 |
| 78 |
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ourNumStore = 0 |
| 79 |
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ourRWCP = -1 |
| 80 |
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ourPrevCEnd = 0 |
| 81 |
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ourFirstUTurned = .FALSE. |
| 82 |
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| 83 |
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IF (ALLOCATED(ourStepOf)) THEN |
| 84 |
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DEALLOCATE(ourStepOf) |
| 85 |
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END IF |
| 86 |
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IF(.NOT.ALLOCATED(ourStepOf)) THEN |
| 87 |
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ALLOCATE(ourStepOf(0:ourACP)) |
| 88 |
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END IF |
| 89 |
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| 90 |
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IF (ourVerbosity>0) THEN |
| 91 |
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predFwdCnt = forwdCount(ourCEnd-ourCStart,ourACP) |
| 92 |
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IF (predFwdCnt==-1) THEN |
| 93 |
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errorMsg='error in forwdCount' |
| 94 |
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RETURN |
| 95 |
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ELSE |
| 96 |
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WRITE (*,'(A)') 'prediction:' |
| 97 |
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WRITE (*,'(A,I7)') ' needed forward steps: ', predFwdCnt |
| 98 |
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WRITE (*,'(A,F8.4)') ' slowdown factor : ', dble(predFwdCnt)/(ourCEnd-ourCStart) |
| 99 |
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END IF |
| 100 |
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END IF |
| 101 |
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END IF |
| 102 |
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END FUNCTION rvInit |
| 103 |
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| 104 |
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!--------------------------------------------------------------------* |
| 105 |
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| 106 |
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SUBROUTINE rvVerbose(level) |
| 107 |
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IMPLICIT NONE |
| 108 |
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INTEGER, INTENT(IN) :: level |
| 109 |
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ourVerbosity=level |
| 110 |
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END SUBROUTINE rvVerbose |
| 111 |
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| 112 |
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!--------------------------------------------------------------------* |
| 113 |
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| 114 |
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FUNCTION rvNextAction() |
| 115 |
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IMPLICIT NONE |
| 116 |
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REAL :: bino1, bino2, bino3, bino4, bino5 |
| 117 |
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INTEGER :: availCP ! available checkpoint slots |
| 118 |
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INTEGER :: prevCStart ! previous subrange start |
| 119 |
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INTEGER :: range ! |
| 120 |
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INTEGER :: reps |
| 121 |
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INTEGER :: i |
| 122 |
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type(rvAction) :: rvNextAction |
| 123 |
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IF (ourNumInv==0) THEN |
| 124 |
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! first invocation |
| 125 |
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DO i = 0, ourACP |
| 126 |
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ourStepOf(i) = 0 |
| 127 |
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END DO |
| 128 |
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ourStepOf(0) = ourCStart - 1 |
| 129 |
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END IF |
| 130 |
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ourNumInv = ourNumInv + 1 |
| 131 |
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IF ((ourCEnd-ourCStart)==0) THEN |
| 132 |
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! nothing in current subrange |
| 133 |
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IF ((ourRWCP==(-1)) .OR. (ourCStart==ourStepOf(0))) THEN |
| 134 |
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! we are done |
| 135 |
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ourRWCP = ourRWCP - 1 |
| 136 |
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IF (ourVerbosity>0) THEN |
| 137 |
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WRITE (*,'(A)') 'summary:' |
| 138 |
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WRITE (*,'(A,I8)') ' forward steps:', ourNumFwd |
| 139 |
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WRITE (*,'(A,I8)') ' CP stores :', ourNumStore |
| 140 |
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WRITE (*,'(A,I8)') ' invocations :', ourNumInv |
| 141 |
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END IF |
| 142 |
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rvNextAction%actionFlag = rvDone |
| 143 |
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ELSE |
| 144 |
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ourCStart = ourStepOf(ourRWCP) |
| 145 |
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ourPrevCEnd = ourCEnd |
| 146 |
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rvNextAction%actionFlag = rvRestore |
| 147 |
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END IF |
| 148 |
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ELSE IF ((ourCEnd-ourCStart)==1) THEN |
| 149 |
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ourCEnd = ourCEnd - 1 |
| 150 |
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ourPrevCEnd = ourCEnd |
| 151 |
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IF ((ourRWCP>=0) .AND. (ourStepOf(ourRWCP)==ourCStart)) ourRWCP = ourRWCP - 1 |
| 152 |
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IF (.NOT.ourFirstUTurned) THEN |
| 153 |
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rvNextAction%actionFlag = rvFirstUTurn |
| 154 |
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ourFirstUTurned = .TRUE. |
| 155 |
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ELSE |
| 156 |
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rvNextAction%actionFlag = rvUTurn |
| 157 |
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END IF |
| 158 |
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ELSE IF ((ourRWCP==(-1)) .OR. (ourStepOf(ourRWCP)/=ourCStart)) THEN |
| 159 |
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ourRWCP = ourRWCP + 1 |
| 160 |
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IF (ourRWCP+1>ourACP) THEN |
| 161 |
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rvNextAction%actionFlag = rvError |
| 162 |
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rvNextAction%errorMsg='insufficient allowed checkpoints' |
| 163 |
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RETURN |
| 164 |
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ELSE |
| 165 |
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ourStepOf(ourRWCP) = ourCStart |
| 166 |
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ourNumStore = ourNumStore + 1 |
| 167 |
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ourPrevCEnd = ourCEnd |
| 168 |
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rvNextAction%actionFlag = rvStore |
| 169 |
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END IF |
| 170 |
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ELSE IF ((ourPrevCEnd<ourCEnd) .AND. (ourACP==ourRWCP+1)) THEN |
| 171 |
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rvNextAction%actionFlag = rvError |
| 172 |
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rvNextAction%errorMsg='insufficient allowed checkpoints' |
| 173 |
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ELSE |
| 174 |
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prevCStart = ourCStart |
| 175 |
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availCP = ourACP - ourRWCP |
| 176 |
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IF (availCP<1) THEN |
| 177 |
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rvNextAction%actionFlag = rvError |
| 178 |
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rvNextAction%errorMsg='insufficient allowed checkpoints' |
| 179 |
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ELSE |
| 180 |
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reps = 0 |
| 181 |
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range = 1 |
| 182 |
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DO WHILE (range<ourCEnd-ourCStart) |
| 183 |
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reps = reps + 1 |
| 184 |
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range = range*(reps+availCP)/reps |
| 185 |
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END DO |
| 186 |
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bino1 = range*reps/(availCP+reps) |
| 187 |
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IF (availCP>1) THEN |
| 188 |
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bino2 = bino1*availCP/(availCP+reps-1) |
| 189 |
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ELSE |
| 190 |
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bino2 = 1 |
| 191 |
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END IF |
| 192 |
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IF (availCP==1) THEN |
| 193 |
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bino3 = 0 |
| 194 |
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ELSE IF (availCP>2) THEN |
| 195 |
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bino3 = bino2*(availCP-1)/(availCP+reps-2) |
| 196 |
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ELSE |
| 197 |
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bino3 = 1 |
| 198 |
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END IF |
| 199 |
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bino4 = bino2*(reps-1)/availCP |
| 200 |
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IF (availCP<3) THEN |
| 201 |
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bino5 = 0 |
| 202 |
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ELSE IF (availCP>3) THEN |
| 203 |
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bino5 = bino3*(availCP-1)/reps |
| 204 |
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ELSE |
| 205 |
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bino5 = 1 |
| 206 |
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END IF |
| 207 |
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IF (ourCEnd-ourCStart<=bino1+bino3) THEN |
| 208 |
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ourCStart = ourCStart + bino4 |
| 209 |
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ELSE IF (ourCEnd-ourCStart>=range-bino5) THEN |
| 210 |
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ourCStart = ourCStart + bino1 |
| 211 |
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ELSE |
| 212 |
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ourCStart = ourCEnd - bino2 - bino3 |
| 213 |
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END IF |
| 214 |
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IF (ourCStart==prevCStart) THEN |
| 215 |
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ourCStart = prevCStart + 1 |
| 216 |
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END IF |
| 217 |
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ourNumFwd = ourNumFwd + ourCStart - prevCStart |
| 218 |
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rvNextAction%actionFlag = rvForward |
| 219 |
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END IF |
| 220 |
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END IF |
| 221 |
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rvNextAction%iteration=ourCStart |
| 222 |
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IF (rvNextAction%actionFlag /= rvError .AND. rvNextAction%actionFlag /= rvDone) THEN |
| 223 |
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IF (ourVerbosity>2) THEN |
| 224 |
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SELECT CASE( rvNextAction%actionFlag) |
| 225 |
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CASE (rvForward) |
| 226 |
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WRITE (*,FMT='(A)',ADVANCE='NO') ' forward to :' |
| 227 |
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CASE (rvRestore) |
| 228 |
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WRITE (*,FMT='(A)',ADVANCE='NO') ' restore at :' |
| 229 |
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CASE (rvFirstUTurn) |
| 230 |
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WRITE (*,FMT='(A)',ADVANCE='NO') ' 1st uturn at:' |
| 231 |
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CASE(rvUTurn) |
| 232 |
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WRITE (*,FMT='(A)',ADVANCE='NO') ' uturn at :' |
| 233 |
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END SELECT |
| 234 |
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END IF |
| 235 |
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IF (ourVerbosity>1) THEN |
| 236 |
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IF (rvNextAction%actionFlag == rvStore) THEN |
| 237 |
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WRITE (*,FMT='(A)',ADVANCE='NO') ' store at :' |
| 238 |
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END IF |
| 239 |
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WRITE (*,'(I8)') rvNextAction%iteration |
| 240 |
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END IF |
| 241 |
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END IF |
| 242 |
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rvNextAction%cpNum=ourRWCP |
| 243 |
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END FUNCTION rvNextAction |
| 244 |
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| 245 |
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!--------------------------------------------------------------------* |
| 246 |
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| 247 |
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FUNCTION rvGuess(steps) |
| 248 |
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IMPLICIT NONE |
| 249 |
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INTEGER :: steps |
| 250 |
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INTEGER :: reps, s, checkpoints |
| 251 |
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INTEGER :: rvGuess |
| 252 |
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checkpoints = 1 |
| 253 |
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reps = 1 |
| 254 |
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s = 0 |
| 255 |
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DO WHILE (chkRange(checkpoints+s,reps+s)>steps) |
| 256 |
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s = s - 1 |
| 257 |
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END DO |
| 258 |
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DO WHILE (chkRange(checkpoints+s,reps+s)<steps) |
| 259 |
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s = s + 1 |
| 260 |
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END DO |
| 261 |
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checkpoints = checkpoints + s |
| 262 |
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reps = reps + s |
| 263 |
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s = -1 |
| 264 |
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DO WHILE (chkRange(checkpoints,reps)>=steps) |
| 265 |
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IF (checkpoints>reps) THEN |
| 266 |
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checkpoints = checkpoints - 1 |
| 267 |
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s = 0 |
| 268 |
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ELSE |
| 269 |
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reps = reps - 1 |
| 270 |
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s = 1 |
| 271 |
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END IF |
| 272 |
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END DO |
| 273 |
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IF (s==0) THEN |
| 274 |
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checkpoints = checkpoints + 1 |
| 275 |
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END IF |
| 276 |
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IF (s==1) reps = reps + 1 |
| 277 |
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rvGuess = checkpoints |
| 278 |
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END FUNCTION rvGuess |
| 279 |
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| 280 |
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!--------------------------------------------------------------------* |
| 281 |
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| 282 |
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FUNCTION rvFactor(steps,checkpoints) |
| 283 |
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IMPLICIT NONE |
| 284 |
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INTEGER :: checkpoints, steps |
| 285 |
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DOUBLE PRECISION :: rvFactor |
| 286 |
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IF (checkpoints<1) THEN |
| 287 |
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WRITE (*,fmt=*) 'error occurs in RVFACTOR: CHECKPOINTS < 1' |
| 288 |
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rvFactor = -1 |
| 289 |
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ELSE IF (checkpoints<1) THEN |
| 290 |
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WRITE (*,fmt=*) 'error occurs in RVFACTOR: CHECKPOINTS < 1' |
| 291 |
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rvFactor = -1 |
| 292 |
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ELSE |
| 293 |
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rvFactor = dble(forwdCount(steps,checkpoints)) |
| 294 |
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IF (rvFactor/=-1) rvFactor = rvFactor/steps |
| 295 |
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END IF |
| 296 |
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END FUNCTION rvFactor |
| 297 |
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| 298 |
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!--------------------------------------------------------------------* |
| 299 |
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| 300 |
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FUNCTION chkRange(ss,tt) |
| 301 |
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IMPLICIT NONE |
| 302 |
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INTEGER :: ss, tt |
| 303 |
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DOUBLE PRECISION :: res |
| 304 |
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INTEGER :: i |
| 305 |
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INTEGER :: chkRange |
| 306 |
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res = 1. |
| 307 |
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IF (tt<0 .OR. ss<0) THEN |
| 308 |
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WRITE (*,fmt=*) 'error in MAXRANGE: negative parameter ' |
| 309 |
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chkRange = -1 |
| 310 |
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ELSE |
| 311 |
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DO i = 1, tt |
| 312 |
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res = res*(ss+i) |
| 313 |
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res = res/i |
| 314 |
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IF (res>=2.0D0**31) EXIT |
| 315 |
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END DO |
| 316 |
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IF (res<2.0D0**31-2) THEN |
| 317 |
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chkRange = res |
| 318 |
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ELSE |
| 319 |
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chkRange = 2.0D0**31 - 3 |
| 320 |
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WRITE (*,fmt=*) 'warning from MAXRANGE: returned maximal integer' |
| 321 |
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WRITE (*,fmt=*) chkRange |
| 322 |
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END IF |
| 323 |
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END IF |
| 324 |
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END FUNCTION chkRange |
| 325 |
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| 326 |
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!--------------------------------------------------------------------* |
| 327 |
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| 328 |
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FUNCTION forwdCount(steps,checkpoints) |
| 329 |
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IMPLICIT NONE |
| 330 |
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INTEGER :: checkpoints, steps |
| 331 |
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INTEGER :: range, reps |
| 332 |
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INTEGER :: forwdCount |
| 333 |
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IF (checkpoints<1) THEN |
| 334 |
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forwdCount = -1 |
| 335 |
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ELSE |
| 336 |
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reps = 0 |
| 337 |
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range = 1 |
| 338 |
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DO WHILE (range<steps) |
| 339 |
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reps = reps + 1 |
| 340 |
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range = range*(reps+checkpoints)/reps |
| 341 |
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END DO |
| 342 |
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forwdCount = reps*steps - range*reps/(checkpoints+1) |
| 343 |
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END IF |
| 344 |
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END FUNCTION forwdCount |
| 345 |
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| 346 |
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!--------------------------------------------------------------------* |
| 347 |
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| 348 |
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END MODULE revolve |
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