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from __future__ import print_function as the first line of code in every file. Thanks to @xnox for the suggestion
33 lines
1.3 KiB
Python
33 lines
1.3 KiB
Python
# Copyright (C) 2006 Douglas Gregor <doug.gregor -at- gmail.com>.
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# Use, modification and distribution is subject to the Boost Software
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# License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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# Test reduce() collective.
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from __future__ import print_function
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import mpi
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from generators import *
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def reduce_test(comm, generator, kind, op, op_kind, root):
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if comm.rank == root:
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print ("Reducing to %s of %s at root %d..." % (op_kind, kind, root)),
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my_value = generator(comm.rank)
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result = mpi.reduce(comm, my_value, op, root)
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if comm.rank == root:
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expected_result = generator(0);
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for p in range(1, comm.size):
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expected_result = op(expected_result, generator(p))
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assert result == expected_result
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print ("OK.")
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else:
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assert result == None
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return
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reduce_test(mpi.world, int_generator, "integers", lambda x,y:x + y, "sum", 0)
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reduce_test(mpi.world, int_generator, "integers", lambda x,y:x * y, "product", 1)
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reduce_test(mpi.world, int_generator, "integers", min, "minimum", 0)
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reduce_test(mpi.world, string_generator, "strings", lambda x,y:x + y, "concatenation", 0)
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reduce_test(mpi.world, string_list_generator, "list of strings", lambda x,y:x + y, "concatenation", 0)
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