source: XIOS/trunk/src/server_distribution_description.hpp @ 865

Last change on this file since 865 was 865, checked in by mhnguyen, 5 years ago

Optimizing codes: Change the way to compute distribution of grid

+) Instead of using DHT on grid, we make use of it only for elements of grid
+) Make change to calculation of server distribution.

Test
+) On Curie
+) Two times faster than the precedent commit.

File size: 3.0 KB
Line 
1/*!
2   \file server_distribution_description.hpp
3   \author Ha NGUYEN
4   \since 04 Jan 2015
5   \date 11 Jan 2016
6
7   \brief Description of index distribution on server(s).
8 */
9
10#ifndef __XIOS_SERVER_DISTRIBUTION_DESCRIPTION_HPP
11#define __XIOS_SERVER_DISTRIBUTION_DESCRIPTION_HPP
12
13#include "xios_spl.hpp"
14#include "array_new.hpp"
15#include <boost/unordered_map.hpp>
16
17namespace xios
18{
19/*!
20   \class CServerDistributionDescription
21   This class contains information that describe distribution of servers.
22*/
23class CServerDistributionDescription
24{
25  public:
26    enum ServerDistributionType
27    {
28      BAND_DISTRIBUTION, PLAN_DISTRIBUTION
29    };
30
31    /** Default constructor */
32    CServerDistributionDescription(const std::vector<int>& globalDimensionSize,
33                                   int nServer,
34                                   ServerDistributionType serType=BAND_DISTRIBUTION);
35
36    /** Default destructor */
37    virtual ~CServerDistributionDescription();
38
39    void computeServerDistribution(bool doComputeGlobalIndex = false, int positionDimensionDistributed = 1);
40    void computeServerGlobalIndexInRange(const std::pair<size_t, size_t>& indexBeginEnd, int positionDimensionDistributed = 1);
41    void computeServerGlobalByElement(std::vector<boost::unordered_map<size_t,std::vector<int> > >& indexServerOnElement,
42                                      int rank,
43                                      int clientSize,
44                                      const CArray<bool,1>& axisDomainOrder,
45                                      int positionDimensionDistributed = 1);
46
47    std::vector<std::vector<int> > getServerIndexBegin() const;
48    std::vector<std::vector<int> > getServerDimensionSizes() const;
49    const std::vector<CArray<size_t,1> >& getGlobalIndex() const;
50    const boost::unordered_map<size_t,int>& getGlobalIndexRange() const;
51    int getDimensionDistributed();
52
53  protected:
54    void computeBandDistribution(int nServer, int positionDimensionDistributed = 1);
55    void computePlanDistribution(int nServer);
56    void computeRangeProcIndex(int clientRank,
57                               int clientSize,
58                               int rangeProcSize,
59                               int& rangeBegin,
60                               int& rangeSize);
61
62  private:
63    std::vector<std::vector<int> > indexBegin_;     //!< Begin index of each dimension
64    std::vector<std::vector<int> > dimensionSizes_; //!< Size of each dimension
65    std::vector<int> nGlobal_; //!< Global size of each dimension
66
67    //!< General case, index describes distribution of each server (rarely use)
68    std::vector<CArray<size_t,1> > vecGlobalIndex_;
69
70    //!< In case we need only global index of one server with specific rank
71    boost::unordered_map<size_t,int> globalIndex_;
72
73    //!< Type of distribution on server side
74    ServerDistributionType serverType_;
75
76    //!< Number of server
77    int nServer_;
78
79    //!< Position of dimension distributed on server side (by default, the second dimension)
80    int positionDimensionDistributed_;
81};
82
83} // namespace xios
84#endif // __XIOS_SERVER_DISTRIBUTION_DESCRIPTION_HPP
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