| 1 | ######################################################### |
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| 2 | # |
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| 3 | # Handle the communication between the host machine |
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| 4 | # (processor 0) and the processors. The host machine is |
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| 5 | # responsible for the doing the initial grid partitioning. |
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| 6 | # |
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| 7 | # The routines given below should be moved to the |
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| 8 | # build_submesh.py and build_local.py file to allow |
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| 9 | # overlapping of communication and computation. |
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| 10 | # This should be done after more debugging. |
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| 11 | # |
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| 12 | # |
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| 13 | # Author: Linda Stals, June 2005 |
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| 14 | # Modified: Linda Stals, Nov 2005 (optimise python code) |
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| 15 | # |
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| 16 | # |
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| 17 | ######################################################### |
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| 18 | |
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| 19 | |
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| 20 | |
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| 21 | import numpy as num |
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| 22 | from anuga import indent |
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| 23 | |
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| 24 | from numpy import array, zeros |
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| 25 | import logging |
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| 26 | import logging.config |
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| 27 | logger = logging.getLogger('parallel') |
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| 28 | logger.setLevel(logging.WARNING) |
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| 29 | |
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| 30 | try: |
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| 31 | logging.config.fileConfig('log.ini') |
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| 32 | except: |
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| 33 | pass |
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| 34 | |
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| 35 | import sys |
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| 36 | |
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| 37 | import pypar |
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| 38 | |
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| 39 | from build_local import build_local_mesh |
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| 40 | |
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| 41 | ######################################################### |
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| 42 | # |
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| 43 | # Send the submesh to processor p. |
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| 44 | # |
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| 45 | # *) The order and form is strongly coupled with |
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| 46 | # rec_submesh. |
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| 47 | # |
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| 48 | # ------------------------------------------------------- |
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| 49 | # |
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| 50 | # *) All of the information has been sent to processor p. |
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| 51 | # |
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| 52 | ######################################################### |
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| 53 | |
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| 54 | def send_submesh(submesh, triangles_per_proc, p): |
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| 55 | |
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| 56 | myid = pypar.rank() |
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| 57 | print 'process %d sending submesh to process %d' %(myid, p) |
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| 58 | |
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| 59 | # build and send the tagmap for the boundary conditions |
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| 60 | |
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| 61 | tagmap = {} |
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| 62 | counter = 1 |
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| 63 | for b in submesh["full_boundary"][p]: |
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| 64 | bkey = submesh["full_boundary"][p][b] |
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| 65 | if not tagmap.has_key(bkey): |
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| 66 | tagmap[bkey] = counter |
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| 67 | counter = counter+1 |
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| 68 | for b in submesh["ghost_boundary"][p]: |
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| 69 | bkey = submesh["ghost_boundary"][p][b] |
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| 70 | if not tagmap.has_key(bkey): |
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| 71 | tagmap[bkey] = counter |
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| 72 | counter = counter+1 |
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| 73 | pypar.send(tagmap, p) |
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| 74 | |
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| 75 | # send the quantities key information |
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| 76 | |
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| 77 | pypar.send(submesh["full_quan"].keys(), p) |
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| 78 | |
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| 79 | # send the number of triangles per processor |
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| 80 | |
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| 81 | pypar.send(triangles_per_proc, p, use_buffer=True) |
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| 82 | |
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| 83 | # compress full_commun |
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| 84 | |
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| 85 | flat_full_commun = [] |
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| 86 | |
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| 87 | for c in submesh["full_commun"][p]: |
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| 88 | for i in range(len(submesh["full_commun"][p][c])): |
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| 89 | flat_full_commun.append([c,submesh["full_commun"][p][c][i]]) |
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| 90 | |
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| 91 | # send the array sizes so memory can be allocated |
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| 92 | |
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| 93 | setup_array = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] |
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| 94 | setup_array[0] = len(submesh["full_nodes"][p]) |
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| 95 | setup_array[1] = len(submesh["ghost_nodes"][p]) |
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| 96 | setup_array[2] = len(submesh["full_triangles"][p]) |
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| 97 | setup_array[3] = len(submesh["ghost_triangles"][p]) |
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| 98 | setup_array[4] = len(submesh["full_boundary"][p]) |
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| 99 | setup_array[5] = len(submesh["ghost_boundary"][p]) |
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| 100 | setup_array[6] = len(submesh["ghost_commun"][p]) |
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| 101 | setup_array[7] = len(flat_full_commun) |
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| 102 | |
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| 103 | pypar.send(setup_array, p) |
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| 104 | |
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| 105 | # send the nodes |
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| 106 | |
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| 107 | pypar.send(submesh["full_nodes"][p], p, use_buffer=True) |
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| 108 | pypar.send(submesh["ghost_nodes"][p], p, use_buffer=True) |
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| 109 | |
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| 110 | # send the triangles |
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| 111 | |
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| 112 | pypar.send(array(submesh["full_triangles"][p], num.int), p, use_buffer=True) |
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| 113 | pypar.send(submesh["ghost_triangles"][p], p, use_buffer=True) |
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| 114 | |
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| 115 | # send the boundary |
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| 116 | |
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| 117 | bc = [] |
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| 118 | for b in submesh["full_boundary"][p]: |
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| 119 | bc.append([b[0], b[1], tagmap[submesh["full_boundary"][p][b]]]) |
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| 120 | pypar.send(bc, p, use_buffer=True) |
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| 121 | bc = [] |
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| 122 | for b in submesh["ghost_boundary"][p]: |
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| 123 | bc.append([b[0], b[1], tagmap[submesh["ghost_boundary"][p][b]]]) |
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| 124 | pypar.send(bc, p, use_buffer=True) |
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| 125 | |
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| 126 | # send the communication pattern |
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| 127 | |
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| 128 | pypar.send(submesh["ghost_commun"][p], p, use_buffer=True) |
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| 129 | pypar.send(flat_full_commun, p, use_buffer=True) |
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| 130 | |
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| 131 | # send the quantities |
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| 132 | |
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| 133 | for k in submesh["full_quan"]: |
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| 134 | pypar.send(submesh["full_quan"][k][p], p, use_buffer=True) |
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| 135 | |
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| 136 | for k in submesh["ghost_quan"]: |
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| 137 | pypar.send(submesh["ghost_quan"][k][p], p, use_buffer=True) |
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| 138 | |
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| 139 | |
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| 140 | ######################################################### |
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| 141 | # |
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| 142 | # Receive the submesh from processor p. |
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| 143 | # |
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| 144 | # *) The order and form is strongly coupled with |
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| 145 | # send_submesh. |
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| 146 | # |
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| 147 | # ------------------------------------------------------- |
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| 148 | # |
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| 149 | # *) All of the information has been received by the |
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| 150 | # processor p and passed into build_local. |
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| 151 | # |
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| 152 | # *) The information is returned in a form needed by the |
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| 153 | # GA datastructure. |
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| 154 | # |
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| 155 | ######################################################### |
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| 156 | |
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| 157 | def rec_submesh_flat(p): |
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| 158 | |
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| 159 | numproc = pypar.size() |
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| 160 | myid = pypar.rank() |
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| 161 | |
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| 162 | submesh_cell = {} |
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| 163 | |
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| 164 | print 'P%d: Receiving submesh from P%d' %(myid, p) |
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| 165 | |
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| 166 | # receive the tagmap for the boundary conditions |
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| 167 | |
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| 168 | tagmap = pypar.receive(p) |
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| 169 | itagmap = {} |
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| 170 | for t in tagmap: |
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| 171 | itagmap[tagmap[t]]=t |
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| 172 | |
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| 173 | # receive the quantities key information |
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| 174 | |
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| 175 | qkeys = pypar.receive(p) |
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| 176 | |
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| 177 | # receive the number of triangles per processor |
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| 178 | |
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| 179 | triangles_per_proc = [] |
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| 180 | for i in range(numproc): |
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| 181 | triangles_per_proc.append([0]) |
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| 182 | |
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| 183 | triangles_per_proc = pypar.receive(p, triangles_per_proc) |
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| 184 | |
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| 185 | # recieve information about the array sizes |
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| 186 | |
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| 187 | setup_array = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] |
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| 188 | setup_array = pypar.receive(p, setup_array) |
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| 189 | |
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| 190 | # receive the full nodes |
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| 191 | |
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| 192 | no_full_nodes = setup_array[0] |
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| 193 | full_nodes = zeros((no_full_nodes, 3), num.float) |
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| 194 | submesh_cell["full_nodes"] = pypar.receive(p, full_nodes) |
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| 195 | |
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| 196 | # receive the ghost nodes |
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| 197 | |
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| 198 | no_ghost_nodes = setup_array[1] |
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| 199 | ghost_nodes = zeros((no_ghost_nodes, 3), num.float) |
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| 200 | submesh_cell["ghost_nodes"] = pypar.receive(p, ghost_nodes) |
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| 201 | |
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| 202 | |
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| 203 | # receive the full triangles |
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| 204 | |
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| 205 | no_full_triangles = setup_array[2] |
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| 206 | full_triangles = zeros((no_full_triangles, 3), Int) |
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| 207 | submesh_cell["full_triangles"] = pypar.receive(p, full_triangles) |
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| 208 | |
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| 209 | # receive the ghost triangles |
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| 210 | |
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| 211 | no_ghost_triangles = setup_array[3] |
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| 212 | ghost_triangles = zeros((no_ghost_triangles, 4), Int) |
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| 213 | submesh_cell["ghost_triangles"] = pypar.receive(p, ghost_triangles) |
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| 214 | |
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| 215 | # receive the full boundary |
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| 216 | |
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| 217 | no_full_boundary = setup_array[4] |
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| 218 | bc = [] |
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| 219 | for i in range(no_full_boundary): |
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| 220 | bc.append([0.0, 0.0, 0.0]) |
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| 221 | bnd_c = pypar.receive(p, bc) |
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| 222 | |
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| 223 | submesh_cell["full_boundary"] = {} |
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| 224 | for b in bnd_c: |
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| 225 | submesh_cell["full_boundary"][b[0],b[1]]=itagmap[b[2]] |
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| 226 | |
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| 227 | # receive the ghost boundary |
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| 228 | |
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| 229 | no_ghost_boundary = setup_array[5] |
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| 230 | bc = [] |
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| 231 | for i in range(no_ghost_boundary): |
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| 232 | bc.append([0.0, 0.0, 0.0]) |
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| 233 | bnd_c = pypar.receive(p, bc) |
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| 234 | |
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| 235 | submesh_cell["ghost_boundary"] = {} |
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| 236 | for b in bnd_c: |
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| 237 | submesh_cell["ghost_boundary"][b[0],b[1]]=itagmap[b[2]] |
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| 238 | |
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| 239 | # receive the ghost communication pattern |
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| 240 | |
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| 241 | no_ghost_commun = setup_array[6] |
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| 242 | ghost_commun = zeros((no_ghost_commun, 2), Int) |
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| 243 | submesh_cell["ghost_commun"] = pypar.receive(p, ghost_commun) |
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| 244 | |
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| 245 | # receive the full communication pattern |
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| 246 | |
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| 247 | no_full_commun = setup_array[7] |
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| 248 | full_commun = [] |
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| 249 | for i in range(no_full_commun): |
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| 250 | full_commun.append([0.0, 0.0]) |
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| 251 | |
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| 252 | full_commun = pypar.receive(p, full_commun) |
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| 253 | |
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| 254 | submesh_cell["full_commun"] = {} |
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| 255 | for c in full_commun: |
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| 256 | submesh_cell["full_commun"][c[0]] = [] |
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| 257 | for c in full_commun: |
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| 258 | submesh_cell["full_commun"][c[0]].append(c[1]) |
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| 259 | |
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| 260 | # receive the quantities |
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| 261 | |
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| 262 | no_quantities = len(qkeys) |
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| 263 | new_quan = zeros((no_full_triangles, 3), num.float) |
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| 264 | submesh_cell["full_quan"]={} |
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| 265 | |
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| 266 | for i in range(no_quantities): |
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| 267 | tmp = pypar.receive(p, new_quan) |
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| 268 | submesh_cell["full_quan"][qkeys[i]]=zeros((no_full_triangles,3), num.float) |
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| 269 | submesh_cell["full_quan"][qkeys[i]][:] = tmp[:] |
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| 270 | |
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| 271 | new_quan = zeros((no_ghost_triangles, 3), num.float) |
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| 272 | submesh_cell["ghost_quan"]={} |
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| 273 | for i in range(no_quantities): |
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| 274 | tmp = pypar.receive(p, new_quan) |
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| 275 | submesh_cell["ghost_quan"][qkeys[i]]= zeros((no_ghost_triangles,3), num.float) |
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| 276 | submesh_cell["ghost_quan"][qkeys[i]][:] = tmp[:] |
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| 277 | |
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| 278 | return submesh_cell, triangles_per_proc |
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| 279 | |
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| 280 | |
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| 281 | |
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| 282 | ######################################################### |
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| 283 | # |
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| 284 | # Receive the submesh from processor p. |
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| 285 | # |
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| 286 | # *) The order and form is strongly coupled with |
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| 287 | # send_submesh. |
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| 288 | # |
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| 289 | # ------------------------------------------------------- |
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| 290 | # |
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| 291 | # *) All of the information has been received by the |
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| 292 | # processor p and passed into build_local. |
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| 293 | # |
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| 294 | # *) The information is returned in a form needed by the |
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| 295 | # GA datastructure. |
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| 296 | # |
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| 297 | ######################################################### |
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| 298 | |
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| 299 | def rec_submesh(p): |
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| 300 | |
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| 301 | numproc = pypar.size() |
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| 302 | myid = pypar.rank() |
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| 303 | |
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| 304 | [submesh_cell, triangles_per_proc] = rec_submesh_flat(p) |
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| 305 | |
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| 306 | # find the full triangles assigned to this processor |
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| 307 | |
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| 308 | lower_t = 0 |
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| 309 | for i in range(myid): |
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| 310 | lower_t = lower_t+triangles_per_proc[i] |
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| 311 | upper_t = lower_t+triangles_per_proc[myid] |
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| 312 | |
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| 313 | # convert the information into a form needed by the GA |
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| 314 | # datastructure |
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| 315 | |
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| 316 | [GAnodes, GAtriangles, boundary, quantities, ghost_rec, full_send] = \ |
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| 317 | build_local_mesh(submesh_cell, lower_t, upper_t, \ |
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| 318 | numproc) |
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| 319 | |
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| 320 | return GAnodes, GAtriangles, boundary, quantities, ghost_rec, full_send |
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| 321 | |
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| 322 | ######################################################### |
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| 323 | # |
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| 324 | # Extract the submesh that will belong to the |
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| 325 | # "host processor" (i.e. processor zero) |
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| 326 | # |
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| 327 | # *) See the documentation for build_submesh |
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| 328 | # |
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| 329 | # ------------------------------------------------------- |
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| 330 | # |
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| 331 | # *) A dictionary containing the full_triangles, |
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| 332 | # full_nodes, full_boundary, ghost_triangles, ghost_nodes, |
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| 333 | # ghost_boundary, ghost_commun and full_commun belonging |
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| 334 | # to processor zero are returned. |
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| 335 | # |
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| 336 | ######################################################### |
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| 337 | def extract_hostmesh(submesh, triangles_per_proc): |
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| 338 | |
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| 339 | submesh_cell = {} |
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| 340 | submesh_cell["full_nodes"] = submesh["full_nodes"][0] |
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| 341 | submesh_cell["ghost_nodes"] = submesh["ghost_nodes"][0] |
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| 342 | submesh_cell["full_triangles"] = submesh["full_triangles"][0] |
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| 343 | submesh_cell["ghost_triangles"] = submesh["ghost_triangles"][0] |
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| 344 | submesh_cell["full_boundary"] = submesh["full_boundary"][0] |
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| 345 | submesh_cell["ghost_boundary"] = submesh["ghost_boundary"][0] |
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| 346 | submesh_cell["ghost_commun"] = submesh["ghost_commun"][0] |
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| 347 | submesh_cell["full_commun"] = submesh["full_commun"][0] |
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| 348 | submesh_cell["full_quan"] ={} |
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| 349 | submesh_cell["ghost_quan"]={} |
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| 350 | for k in submesh["full_quan"]: |
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| 351 | submesh_cell["full_quan"][k] = submesh["full_quan"][k][0] |
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| 352 | submesh_cell["ghost_quan"][k] = submesh["ghost_quan"][k][0] |
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| 353 | |
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| 354 | numprocs = pypar.size() |
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| 355 | points, vertices, boundary, quantities, ghost_recv_dict, full_send_dict = \ |
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| 356 | build_local_mesh(submesh_cell, 0, triangles_per_proc[0], numprocs) |
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| 357 | return points, vertices, boundary, quantities, ghost_recv_dict, \ |
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| 358 | full_send_dict |
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| 359 | |
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| 360 | |
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| 361 | |
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