49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
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// Copyright 2009-2020 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#include "parallel_for.h"
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#include "../sys/regression.h"
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namespace embree
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{
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struct parallel_for_regression_test : public RegressionTest
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{
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parallel_for_regression_test(const char* name) : RegressionTest(name) {
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registerRegressionTest(this);
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}
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bool run ()
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{
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bool passed = true;
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const size_t M = 10;
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for (size_t N=10; N<10000000; N=size_t(2.1*N))
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{
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/* sequentially calculate sum of squares */
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size_t sum0 = 0;
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for (size_t i=0; i<N; i++) {
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sum0 += i*i;
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}
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/* parallel calculation of sum of squares */
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for (size_t m=0; m<M; m++)
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{
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std::atomic<size_t> sum1(0);
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parallel_for( size_t(0), size_t(N), size_t(1024), [&](const range<size_t>& r)
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{
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size_t s = 0;
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for (size_t i=r.begin(); i<r.end(); i++)
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s += i*i;
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sum1 += s;
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});
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passed = sum0 == sum1;
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}
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}
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return passed;
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}
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};
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parallel_for_regression_test parallel_for_regression("parallel_for_regression_test");
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}
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