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| #include <oneapi/dpl/algorithm> | |
| #include <oneapi/dpl/execution> | |
| #include <CL/sycl.hpp> | |
| #include <vector> | |
| int main(int argc, char *argv[]) | |
| { | |
| std::size_t n = 100'000'000; | |
| int nrep = 10; | |
| sycl::queue queue{sycl::default_selector()}; | |
| auto policy = oneapi::dpl::execution::make_device_policy(queue); | |
| double alpha = 1.0; | |
| { | |
| sycl::usm_allocator<double, sycl::usm::alloc::shared> | |
| alloc(queue); | |
| std::vector<double, decltype(alloc)> x(n, alloc); | |
| std::vector<double, decltype(alloc)> y(n, alloc); | |
| auto policy = oneapi::dpl::execution::make_device_policy(queue); | |
| std::fill(policy, x.begin(), x.end(), 0.555); | |
| std::fill(policy, y.begin(), y.end(), -0.555); | |
| double *_x = x.data(); | |
| double *_y = y.data(); | |
| auto start = std::chrono::high_resolution_clock::now(); | |
| for (int j = 0; j < nrep; j++) | |
| { | |
| std::transform(policy, x.cbegin(), x.cend(), y.cbegin(), y.begin(), | |
| [alpha](const double &vx, const double &vy) | |
| { return vx * alpha + vy; }); | |
| } | |
| auto end = std::chrono::high_resolution_clock::now(); | |
| auto t = std::chrono::duration_cast<std::chrono::duration<double>>(end - start); | |
| std::cout << "Elapsed time " << t.count(); | |
| } | |
| { | |
| double *x = cl::sycl::malloc_device<double>(n, queue); | |
| double *y = cl::sycl::malloc_device<double>(n, queue); | |
| queue.fill<double>(x, 0.555, n); | |
| queue.fill<double>(y, -0.555, n); | |
| queue.wait(); | |
| auto start = std::chrono::high_resolution_clock::now(); | |
| for (int j = 0; j < nrep; j++) | |
| { | |
| std::transform(policy, x, x + n, y, y, | |
| [alpha](const double &vx, const double &vy) | |
| { return vx * alpha + vy; }); | |
| } | |
| auto end = std::chrono::high_resolution_clock::now(); | |
| auto t = std::chrono::duration_cast<std::chrono::duration<double>>(end - start); | |
| std::cout << "\nElapsed time " << t.count(); | |
| cl::sycl::free(x, queue); | |
| cl::sycl::free(y, queue); | |
| } | |
| return 0; | |
| } |
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