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source: branches/MPI/HeuristicLab.Operators.MPISupport/3.3/MPIUnidirectionalRingMigrator.cs @ 7544

Last change on this file since 7544 was 7205, checked in by svonolfe, 13 years ago

Refactored solution (#1542)

File size: 2.9 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Linq;
25using System.Text;
26using HeuristicLab.Core;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28using HeuristicLab.Common;
29using HeuristicLab.Optimization;
30
31namespace HeuristicLab.Operators.MPISupport {
32  [Item("MPIUnidirectionalRingMigrator", "A unidirectional ring migrator that utilizes MPI if available.")]
33  [StorableClass]
34  public class MPIUnidirectionalRingMigrator : SingleSuccessorOperator {
35    [StorableConstructor]
36    private MPIUnidirectionalRingMigrator(bool deserializing) : base(deserializing) { }
37    private MPIUnidirectionalRingMigrator(MPIUnidirectionalRingMigrator original, Cloner cloner) : base(original, cloner) { }
38    public override IDeepCloneable Clone(Cloner cloner) {
39      return new MPIUnidirectionalRingMigrator(this, cloner);
40    }
41    public MPIUnidirectionalRingMigrator()
42      : base() {
43    }
44
45    public static int Channel = 100;
46
47    public override IOperation Apply() {
48      if (MPI.Communicator.world != null) {
49        int size = MPI.Communicator.world.Size;
50        if (size > 1) {
51          int i = MPI.Communicator.world.Rank;
52          IScope scope = ExecutionContext.Scope;
53
54          IScope emigrants = scope.SubScopes[1];
55          scope.SubScopes.Remove(emigrants);
56          int recipent = i + 1;
57          if (recipent == size)
58            recipent = 0;
59
60          Console.WriteLine("MIGRATE " + i + " TO " + recipent);
61          MPI.Communicator.world.Send<MPITransportWrapper<IScope>>(
62            new MPITransportWrapper<IScope>(emigrants), recipent, Channel);
63
64          IScope immigrants = null;
65          int sender = i - 1;
66          if (sender < 0)
67            sender = size - 1;
68
69          Console.WriteLine("MIGRATE " + i + " FROM " + sender);
70          immigrants = MPI.Communicator.world.Receive<MPITransportWrapper<IScope>>(sender, Channel).InnerItem;
71
72          scope.SubScopes.Add(immigrants);
73        }
74      }
75
76      return base.Apply();
77    }
78  }
79}
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