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source/module_base/test_parallel/blacs_connector_test.cpp
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| #ifdef __MPI | ||
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| #include "../blacs_connector.h" | ||
| #include <mpi.h> | ||
| #include "gtest/gtest.h" | ||
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| /************************************************ | ||
| * unit test of functions in blacs_connector.h | ||
| ***********************************************/ | ||
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| /** | ||
| * - Tested Function | ||
| * - Cblacs_gridinit | ||
| * - Initializes a grid of processors with a given number of rows and columns. | ||
| * The function creates a cartesian topology of all the processors initialized | ||
| * by the BLS library. In this topology, each processor is identified by its | ||
| * coordinates (row, col) in the grid. | ||
| */ | ||
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| class BLACSTest: public testing::Test | ||
| { | ||
| protected: | ||
| void SetUp(); | ||
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| int rank = 0; | ||
| int nprocs = 0; | ||
| char layout = 'R'; | ||
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| // number of rows and columns in the process grid | ||
| int nprow = 0; | ||
| int npcol = 0; | ||
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| // process coordinate | ||
| int iprow = -1; | ||
| int ipcol = -1; | ||
| }; | ||
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| void BLACSTest::SetUp() | ||
| { | ||
| Cblacs_pinfo(&rank, &nprocs); | ||
| } | ||
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| TEST_F(BLACSTest, WorldGrid) | ||
| { | ||
| // generate a grid of size 1 x nproc | ||
| nprow = 1; | ||
| npcol = nprocs; | ||
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| int ictxt_row = Csys2blacs_handle(MPI_COMM_WORLD); | ||
| Cblacs_gridinit(&ictxt_row, &layout, nprow, npcol); | ||
| Cblacs_gridinfo(ictxt_row, &nprow, &npcol, &iprow, &ipcol); | ||
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| EXPECT_EQ(iprow, 0); | ||
| EXPECT_EQ(ipcol, rank); | ||
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| // generate a grid of size nproc x 1 | ||
| nprow = nprocs; | ||
| npcol = 1; | ||
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| int ictxt_col = Csys2blacs_handle(MPI_COMM_WORLD); | ||
| Cblacs_gridinit(&ictxt_col, &layout, nprow, npcol); | ||
| Cblacs_gridinfo(ictxt_col, &nprow, &npcol, &iprow, &ipcol); | ||
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| EXPECT_EQ(iprow, rank); | ||
| EXPECT_EQ(ipcol, 0); | ||
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| // two BLACS grids should have difference context index | ||
| EXPECT_NE(ictxt_row, ictxt_col); | ||
| } | ||
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| TEST_F(BLACSTest, SplitGrid) | ||
| { | ||
| // this test create BLACS grids based on a disjoint communicator | ||
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| const int n_blacs = 2; | ||
| int rank_sub = -1; | ||
| int nprocs_sub = 0; | ||
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| // sub communicators are divided based on odd / even ranks | ||
| MPI_Comm comm_sub; | ||
| MPI_Comm_split(MPI_COMM_WORLD, rank % n_blacs, rank, &comm_sub); | ||
| MPI_Comm_rank(comm_sub, &rank_sub); | ||
| MPI_Comm_size(comm_sub, &nprocs_sub); | ||
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| int ctxt_sub = Csys2blacs_handle(comm_sub); | ||
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| nprow = 1, npcol = nprocs_sub; // row-like grids | ||
| Cblacs_gridinit(&ctxt_sub, &layout, nprow, npcol); | ||
| Cblacs_gridinfo(ctxt_sub, &nprow, &npcol, &iprow, &ipcol); | ||
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| // verifies that the BLACS grid is created based on comm_sub instead of MPI_COMM_WORLD | ||
| EXPECT_EQ(iprow, 0); | ||
| EXPECT_EQ(ipcol, rank_sub); | ||
| } | ||
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| int main(int argc, char** argv) | ||
| { | ||
| MPI_Init(&argc, &argv); | ||
| testing::InitGoogleTest(&argc, argv); | ||
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| int result = RUN_ALL_TESTS(); | ||
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| MPI_Finalize(); | ||
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| return result; | ||
| } | ||
| #endif |
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| #!/bin/bash -e | ||
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| np=`cat /proc/cpuinfo | grep "cpu cores" | uniq| awk '{print $NF}'` | ||
| echo "nprocs in this machine is $np" | ||
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| for i in {8..2}; | ||
| do | ||
| if [[ $i -gt $np ]];then | ||
| continue | ||
| fi | ||
| echo "TEST in parallel, nprocs=$i" | ||
| mpirun -np $i ./blacs_connector | ||
| break | ||
| done | ||
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