Last change
on this file since 773 was
721,
checked in by mhnguyen, 9 years ago
|
Templated version of distributed hashed table
+) Implement DHT in more generic way to work with different type of information
+) Some old codes of DHT are kept to be a reference (they will be deleted soon)
Test
+) On local, mode attached, 8 processes
+) test_remap passes and result is correct
|
File size:
1.3 KB
|
Rev | Line | |
---|
[721] | 1 | /*! |
---|
| 2 | \file policy.cpp |
---|
| 3 | \author Ha NGUYEN |
---|
| 4 | \since 06 Oct 2015 |
---|
| 5 | \date 06 Oct 2015 |
---|
| 6 | |
---|
| 7 | \brief Some useful policies for templated classes |
---|
| 8 | */ |
---|
| 9 | |
---|
| 10 | #include "policy.hpp" |
---|
| 11 | #include <cmath> |
---|
| 12 | |
---|
| 13 | namespace xios |
---|
| 14 | { |
---|
| 15 | /*! |
---|
| 16 | Calculate MPI communicator for each level of hierarchy. |
---|
| 17 | \param[in] mpiCommRoot MPI communicator of the level 0 (usually communicator of all clients) |
---|
| 18 | \param[in] levels number of level in hierarchy |
---|
| 19 | */ |
---|
| 20 | void DivideCommByTwo::computeMPICommLevel(const MPI_Comm& mpiCommRoot, int levels) |
---|
| 21 | { |
---|
| 22 | int nbProc; |
---|
| 23 | MPI_Comm_size(mpiCommRoot,&nbProc); |
---|
| 24 | if (levels > nbProc) levels = std::log10(nbProc) * 3.3219; // log2(x) = log2(10) * log10(x); stupid C++98 |
---|
| 25 | else if (1 > levels) levels = 1; |
---|
| 26 | |
---|
| 27 | commLevel_.push_back(mpiCommRoot); |
---|
| 28 | divideMPICommLevel(mpiCommRoot, levels); |
---|
| 29 | } |
---|
| 30 | |
---|
| 31 | /*! |
---|
| 32 | Divide each MPI communicator into sub-communicator. Recursive function |
---|
| 33 | \param [in] mpiCommLevel MPI communicator of current level |
---|
| 34 | \param [in] level current level |
---|
| 35 | */ |
---|
| 36 | void DivideCommByTwo::divideMPICommLevel(const MPI_Comm& mpiCommLevel, int level) |
---|
| 37 | { |
---|
| 38 | int clientRank; |
---|
| 39 | MPI_Comm_rank(mpiCommLevel,&clientRank); |
---|
| 40 | |
---|
| 41 | --level; |
---|
| 42 | if (0 < level) |
---|
| 43 | { |
---|
| 44 | int color = clientRank % 2; |
---|
| 45 | commLevel_.push_back(MPI_Comm()); |
---|
| 46 | MPI_Comm_split(mpiCommLevel, color, 0, &(commLevel_.back())); |
---|
| 47 | divideMPICommLevel(commLevel_.back(), level); |
---|
| 48 | } |
---|
| 49 | } |
---|
| 50 | |
---|
| 51 | } |
---|
| 52 | |
---|
Note: See
TracBrowser
for help on using the repository browser.