1 | #!/usr/bin/env python |
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2 | ### |
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3 | ######################################################### |
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4 | # |
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5 | # Main file for parallel mesh testing. Runs an advection |
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6 | # flow simulation using a rectangular mesh |
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7 | # |
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8 | # |
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9 | # Authors: Steve Roberts June 2005 |
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10 | # Modified by Linda Stals April 2006 |
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11 | # |
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12 | # |
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13 | ######################################################### |
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14 | |
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15 | |
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16 | import sys |
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17 | from os import sep |
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18 | sys.path.append('..'+sep+'pyvolution') |
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19 | sys.path.append('..'+sep+'parallel') |
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20 | |
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21 | # Parallel communication routines |
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22 | |
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23 | import pypar |
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24 | |
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25 | # Mesh partition routines |
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26 | |
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27 | from parallel.parallel_meshes import parallel_rectangle |
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28 | |
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29 | # Parallel Domain |
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30 | |
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31 | from parallel.parallel_advection import Parallel_Domain |
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32 | from parallel.parallel_advection import Transmissive_boundary |
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33 | |
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34 | ############################ |
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35 | # Set the initial conditions |
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36 | ############################ |
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37 | class Set_Stage: |
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38 | """Set an initial condition with constant water height, for x<x0 |
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39 | """ |
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40 | |
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41 | def __init__(self, x0=0.25, x1=0.5, h=1.0): |
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42 | self.x0 = x0 |
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43 | self.x1 = x1 |
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44 | self.h = h |
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45 | |
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46 | def __call__(self, x, y): |
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47 | return self.h*((x>self.x0)&(x<self.x1)) |
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48 | |
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49 | ############################### |
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50 | # Read in processor information |
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51 | ############################### |
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52 | |
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53 | numprocs = pypar.size() |
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54 | myid = pypar.rank() |
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55 | processor_name = pypar.Get_processor_name() |
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56 | |
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57 | ####################### |
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58 | # Partition the mesh |
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59 | ####################### |
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60 | N = 20 |
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61 | M = 20 |
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62 | |
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63 | # Build a unit mesh, subdivide it over numproces processors with each |
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64 | # submesh containing M*N nodes |
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65 | |
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66 | points, vertices, boundary, full_send_dict, ghost_recv_dict = \ |
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67 | parallel_rectangle(N, M, len1_g=1.0) |
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68 | |
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69 | ########################################### |
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70 | # Start the computations on each subpartion |
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71 | ########################################### |
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72 | |
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73 | # Create advection domain with direction (1,-1) |
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74 | # Initial condition is zero by default |
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75 | |
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76 | domain = Parallel_Domain(points, vertices, boundary, |
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77 | full_send_dict, ghost_recv_dict, velocity=[1.0, 0.0]) |
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78 | |
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79 | # Turn on the visualisation |
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80 | |
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81 | rect = [0.0, 0.0, 1.0, 1.0] |
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82 | domain.initialise_visualiser(rect=rect) |
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83 | |
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84 | # Boundaries |
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85 | |
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86 | T = Transmissive_boundary(domain) |
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87 | domain.default_order = 2 |
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88 | domain.set_boundary( {'left': T, 'right': T, 'bottom': T, 'top': T, \ |
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89 | 'ghost': None} ) |
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90 | |
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91 | # Ensure that the domain definitions make sense |
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92 | |
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93 | domain.check_integrity() |
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94 | |
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95 | # Set the inititial conditions |
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96 | |
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97 | domain.set_quantity('stage', Set_Stage(0.2,0.4,1.0)) |
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98 | |
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99 | # Let processor 0 output some timing information |
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100 | |
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101 | if myid == 0: |
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102 | import time |
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103 | t0 = time.time() |
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104 | |
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105 | # Start the evolve computions |
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106 | |
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107 | for t in domain.evolve(yieldstep = 0.1, finaltime = 3.0): |
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108 | if myid == 0: |
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109 | domain.write_time() |
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110 | |
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111 | # Output some computation statistics |
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112 | |
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113 | if myid == 0: |
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114 | print 'That took %.2f seconds' %(time.time()-t0) |
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115 | print 'Communication time %.2f seconds'\ |
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116 | %domain.communication_time |
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117 | print 'Reduction Communication time %.2f seconds'\ |
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118 | %domain.communication_reduce_time |
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119 | |
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120 | |
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