| # Copyright (C) 2006 Douglas Gregor <doug.gregor -at- gmail.com>. |
| |
| # Use, modification and distribution is subject to the Boost Software |
| # License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| # http://www.boost.org/LICENSE_1_0.txt) |
| |
| # Test scan() collective. |
| |
| import boost.parallel.mpi as mpi |
| from generators import * |
| |
| def scan_test(comm, generator, kind, op, op_kind): |
| if comm.rank == 0: |
| print ("Prefix reduction to %s of %s..." % (op_kind, kind)), |
| my_value = generator(comm.rank) |
| result = mpi.scan(comm, my_value, op) |
| expected_result = generator(0); |
| for p in range(1, comm.rank+1): |
| expected_result = op(expected_result, generator(p)) |
| |
| assert result == expected_result |
| if comm.rank == 0: |
| print "OK." |
| return |
| |
| scan_test(mpi.world, int_generator, "integers", lambda x,y:x + y, "sum") |
| scan_test(mpi.world, int_generator, "integers", lambda x,y:x * y, "product") |
| scan_test(mpi.world, string_generator, "strings", lambda x,y:x + y, "concatenation") |
| scan_test(mpi.world, string_list_generator, "list of strings", lambda x,y:x + y, "concatenation") |