1 2 /* 3 Code for some of the parallel vector primatives. 4 */ 5 #include <../src/vec/vec/impls/mpi/pvecimpl.h> 6 #include <petscblaslapack.h> 7 8 #undef __FUNCT__ 9 #define __FUNCT__ "VecMDot_MPI" 10 PetscErrorCode VecMDot_MPI(Vec xin,PetscInt nv,const Vec y[],PetscScalar *z) 11 { 12 PetscScalar awork[128],*work = awork; 13 PetscErrorCode ierr; 14 15 PetscFunctionBegin; 16 if (nv > 128) { 17 ierr = PetscMalloc(nv*sizeof(PetscScalar),&work);CHKERRQ(ierr); 18 } 19 ierr = VecMDot_Seq(xin,nv,y,work);CHKERRQ(ierr); 20 ierr = MPI_Allreduce(work,z,nv,MPIU_SCALAR,MPIU_SUM,((PetscObject)xin)->comm);CHKERRQ(ierr); 21 if (nv > 128) { 22 ierr = PetscFree(work);CHKERRQ(ierr); 23 } 24 PetscFunctionReturn(0); 25 } 26 27 #undef __FUNCT__ 28 #define __FUNCT__ "VecMTDot_MPI" 29 PetscErrorCode VecMTDot_MPI(Vec xin,PetscInt nv,const Vec y[],PetscScalar *z) 30 { 31 PetscScalar awork[128],*work = awork; 32 PetscErrorCode ierr; 33 34 PetscFunctionBegin; 35 if (nv > 128) { 36 ierr = PetscMalloc(nv*sizeof(PetscScalar),&work);CHKERRQ(ierr); 37 } 38 ierr = VecMTDot_Seq(xin,nv,y,work);CHKERRQ(ierr); 39 ierr = MPI_Allreduce(work,z,nv,MPIU_SCALAR,MPIU_SUM,((PetscObject)xin)->comm);CHKERRQ(ierr); 40 if (nv > 128) { 41 ierr = PetscFree(work);CHKERRQ(ierr); 42 } 43 PetscFunctionReturn(0); 44 } 45 46 #include <../src/vec/vec/impls/seq/ftn-kernels/fnorm.h> 47 #undef __FUNCT__ 48 #define __FUNCT__ "VecNorm_MPI" 49 PetscErrorCode VecNorm_MPI(Vec xin,NormType type,PetscReal *z) 50 { 51 PetscReal sum,work = 0.0; 52 PetscScalar *xx = *(PetscScalar**)xin->data; 53 PetscErrorCode ierr; 54 PetscInt n = xin->map->n; 55 PetscBLASInt one = 1,bn = PetscBLASIntCast(n); 56 57 PetscFunctionBegin; 58 if (type == NORM_2 || type == NORM_FROBENIUS) { 59 work = BLASdot_(&bn,xx,&one,xx,&one); 60 ierr = MPI_Allreduce(&work,&sum,1,MPIU_REAL,MPIU_SUM,((PetscObject)xin)->comm);CHKERRQ(ierr); 61 *z = PetscSqrtReal(sum); 62 ierr = PetscLogFlops(2.0*xin->map->n);CHKERRQ(ierr); 63 } else if (type == NORM_1) { 64 /* Find the local part */ 65 ierr = VecNorm_Seq(xin,NORM_1,&work);CHKERRQ(ierr); 66 /* Find the global max */ 67 ierr = MPI_Allreduce(&work,z,1,MPIU_REAL,MPIU_SUM,((PetscObject)xin)->comm);CHKERRQ(ierr); 68 } else if (type == NORM_INFINITY) { 69 /* Find the local max */ 70 ierr = VecNorm_Seq(xin,NORM_INFINITY,&work);CHKERRQ(ierr); 71 /* Find the global max */ 72 ierr = MPI_Allreduce(&work,z,1,MPIU_REAL,MPIU_MAX,((PetscObject)xin)->comm);CHKERRQ(ierr); 73 } else if (type == NORM_1_AND_2) { 74 PetscReal temp[2]; 75 ierr = VecNorm_Seq(xin,NORM_1,temp);CHKERRQ(ierr); 76 ierr = VecNorm_Seq(xin,NORM_2,temp+1);CHKERRQ(ierr); 77 temp[1] = temp[1]*temp[1]; 78 ierr = MPI_Allreduce(temp,z,2,MPIU_REAL,MPIU_SUM,((PetscObject)xin)->comm);CHKERRQ(ierr); 79 z[1] = PetscSqrtReal(z[1]); 80 } 81 PetscFunctionReturn(0); 82 } 83 84 /* 85 These two functions are the MPI reduction operation used for max and min with index 86 The call below to MPI_Op_create() converts the function Vec[Max,Min]_Local() to the 87 MPI operator Vec[Max,Min]_Local_Op. 88 */ 89 MPI_Op VecMax_Local_Op = 0; 90 MPI_Op VecMin_Local_Op = 0; 91 92 EXTERN_C_BEGIN 93 #undef __FUNCT__ 94 #define __FUNCT__ "VecMax_Local" 95 void MPIAPI VecMax_Local(void *in,void *out,PetscMPIInt *cnt,MPI_Datatype *datatype) 96 { 97 PetscReal *xin = (PetscReal *)in,*xout = (PetscReal*)out; 98 99 PetscFunctionBegin; 100 if (*datatype != MPIU_REAL) { 101 (*PetscErrorPrintf)("Can only handle MPIU_REAL data types"); 102 MPI_Abort(MPI_COMM_WORLD,1); 103 } 104 if (xin[0] > xout[0]) { 105 xout[0] = xin[0]; 106 xout[1] = xin[1]; 107 } else if (xin[0] == xout[0]) { 108 xout[1] = PetscMin(xin[1],xout[1]); 109 } 110 PetscFunctionReturnVoid(); /* cannot return a value */ 111 } 112 EXTERN_C_END 113 114 EXTERN_C_BEGIN 115 #undef __FUNCT__ 116 #define __FUNCT__ "VecMin_Local" 117 void MPIAPI VecMin_Local(void *in,void *out,PetscMPIInt *cnt,MPI_Datatype *datatype) 118 { 119 PetscReal *xin = (PetscReal *)in,*xout = (PetscReal*)out; 120 121 PetscFunctionBegin; 122 if (*datatype != MPIU_REAL) { 123 (*PetscErrorPrintf)("Can only handle MPIU_REAL data types"); 124 MPI_Abort(MPI_COMM_WORLD,1); 125 } 126 if (xin[0] < xout[0]) { 127 xout[0] = xin[0]; 128 xout[1] = xin[1]; 129 } else if (xin[0] == xout[0]) { 130 xout[1] = PetscMin(xin[1],xout[1]); 131 } 132 PetscFunctionReturnVoid(); 133 } 134 EXTERN_C_END 135 136 #undef __FUNCT__ 137 #define __FUNCT__ "VecMax_MPI" 138 PetscErrorCode VecMax_MPI(Vec xin,PetscInt *idx,PetscReal *z) 139 { 140 PetscErrorCode ierr; 141 PetscReal work; 142 143 PetscFunctionBegin; 144 /* Find the local max */ 145 ierr = VecMax_Seq(xin,idx,&work);CHKERRQ(ierr); 146 147 /* Find the global max */ 148 if (!idx) { 149 ierr = MPI_Allreduce(&work,z,1,MPIU_REAL,MPIU_MAX,((PetscObject)xin)->comm);CHKERRQ(ierr); 150 } else { 151 PetscReal work2[2],z2[2]; 152 PetscInt rstart; 153 rstart = xin->map->rstart; 154 work2[0] = work; 155 work2[1] = *idx + rstart; 156 ierr = MPI_Allreduce(work2,z2,2,MPIU_REAL,VecMax_Local_Op,((PetscObject)xin)->comm);CHKERRQ(ierr); 157 *z = z2[0]; 158 *idx = (PetscInt)z2[1]; 159 } 160 PetscFunctionReturn(0); 161 } 162 163 #undef __FUNCT__ 164 #define __FUNCT__ "VecMin_MPI" 165 PetscErrorCode VecMin_MPI(Vec xin,PetscInt *idx,PetscReal *z) 166 { 167 PetscErrorCode ierr; 168 PetscReal work; 169 170 PetscFunctionBegin; 171 /* Find the local Min */ 172 ierr = VecMin_Seq(xin,idx,&work);CHKERRQ(ierr); 173 174 /* Find the global Min */ 175 if (!idx) { 176 ierr = MPI_Allreduce(&work,z,1,MPIU_REAL,MPIU_MIN,((PetscObject)xin)->comm);CHKERRQ(ierr); 177 } else { 178 PetscReal work2[2],z2[2]; 179 PetscInt rstart; 180 181 ierr = VecGetOwnershipRange(xin,&rstart,PETSC_NULL);CHKERRQ(ierr); 182 work2[0] = work; 183 work2[1] = *idx + rstart; 184 ierr = MPI_Allreduce(work2,z2,2,MPIU_REAL,VecMin_Local_Op,((PetscObject)xin)->comm);CHKERRQ(ierr); 185 *z = z2[0]; 186 *idx = (PetscInt)z2[1]; 187 } 188 PetscFunctionReturn(0); 189 } 190 191 192 193 194 195 196 197 198