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