135 lines
4.0 KiB
C++
135 lines
4.0 KiB
C++
/*
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//@HEADER
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// ************************************************************************
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//
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// Kokkos v. 3.0
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// Copyright (2020) National Technology & Engineering
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// Solutions of Sandia, LLC (NTESS).
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the Corporation nor the names of the
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY NTESS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NTESS OR THE
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Questions? Contact Christian R. Trott (crtrott@sandia.gov)
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//
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// ************************************************************************
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//@HEADER
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*/
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#include <iostream>
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#include <Kokkos_Core.hpp>
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namespace Test {
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template <class Space>
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class TestUniqueToken {
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public:
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typedef typename Space::execution_space execution_space;
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typedef Kokkos::View<int*, execution_space> view_type;
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Kokkos::Experimental::UniqueToken<
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execution_space, Kokkos::Experimental::UniqueTokenScope::Global>
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tokens;
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view_type verify;
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view_type counts;
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view_type errors;
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KOKKOS_INLINE_FUNCTION
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void operator()(long) const {
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const int32_t t = tokens.acquire();
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bool ok = true;
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ok = ok && 0 <= t;
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ok = ok && t < tokens.size();
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ok = ok && 0 == Kokkos::atomic_fetch_add(&verify(t), 1);
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Kokkos::atomic_fetch_add(&counts(t), 1);
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ok = ok && 1 == Kokkos::atomic_fetch_add(&verify(t), -1);
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if (!ok) {
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Kokkos::atomic_fetch_add(&errors(0), 1);
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}
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tokens.release(t);
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}
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TestUniqueToken()
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: tokens(execution_space()),
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verify("TestUniqueTokenVerify", tokens.size()),
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counts("TestUniqueTokenCounts", tokens.size()),
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errors("TestUniqueTokenErrors", 1) {}
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static void run() {
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using policy = Kokkos::RangePolicy<execution_space>;
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TestUniqueToken self;
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{
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const int duplicate = 100;
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const long n = duplicate * self.tokens.size();
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Kokkos::parallel_for(policy(0, n), self);
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Kokkos::parallel_for(policy(0, n), self);
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Kokkos::parallel_for(policy(0, n), self);
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Kokkos::fence();
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}
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typename view_type::HostMirror host_counts =
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Kokkos::create_mirror_view(self.counts);
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Kokkos::deep_copy(host_counts, self.counts);
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int32_t max = 0;
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{
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const long n = host_counts.extent(0);
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for (long i = 0; i < n; ++i) {
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if (max < host_counts[i]) max = host_counts[i];
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}
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}
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std::cout << "TestUniqueToken max reuse = " << max << std::endl;
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typename view_type::HostMirror host_errors =
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Kokkos::create_mirror_view(self.errors);
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Kokkos::deep_copy(host_errors, self.errors);
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ASSERT_EQ(host_errors(0), 0);
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}
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};
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TEST(TEST_CATEGORY, unique_token) { TestUniqueToken<TEST_EXECSPACE>::run(); }
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} // namespace Test
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