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#include <unittest/unittest.h>
#include <thrust/scan.h>
#include <thrust/functional.h>
#include <thrust/execution_policy.h>
template<typename ExecutionPolicy, typename Iterator1, typename Iterator2, typename Iterator3>
__global__
void inclusive_scan_by_key_kernel(ExecutionPolicy exec, Iterator1 keys_first, Iterator1 keys_last, Iterator2 values_first, Iterator3 result)
{
thrust::inclusive_scan_by_key(exec, keys_first, keys_last, values_first, result);
}
template<typename ExecutionPolicy, typename Iterator1, typename Iterator2, typename Iterator3>
__global__
void exclusive_scan_by_key_kernel(ExecutionPolicy exec, Iterator1 keys_first, Iterator1 keys_last, Iterator2 values_first, Iterator3 result)
{
thrust::exclusive_scan_by_key(exec, keys_first, keys_last, values_first, result);
}
template<typename ExecutionPolicy, typename Iterator1, typename Iterator2, typename Iterator3, typename T>
__global__
void exclusive_scan_by_key_kernel(ExecutionPolicy exec, Iterator1 keys_first, Iterator1 keys_last, Iterator2 values_first, Iterator3 result, T init)
{
thrust::exclusive_scan_by_key(exec, keys_first, keys_last, values_first, result, init);
}
template<typename ExecutionPolicy>
void TestScanByKeyDevice(ExecutionPolicy exec)
{
size_t n = 1000;
thrust::host_vector<int> h_keys(n);
for(size_t i = 0, k = 0; i < n; i++)
{
h_keys[i] = static_cast<int>(k);
if(rand() % 10 == 0)
{
k++;
}
}
thrust::device_vector<int> d_keys = h_keys;
thrust::host_vector<int> h_vals = unittest::random_integers<int>(n);
for(size_t i = 0; i < n; i++)
{
h_vals[i] = i % 10;
}
thrust::device_vector<int> d_vals = h_vals;
thrust::host_vector<int> h_output(n);
thrust::device_vector<int> d_output(n);
thrust::inclusive_scan_by_key(h_keys.begin(), h_keys.end(), h_vals.begin(), h_output.begin());
inclusive_scan_by_key_kernel<<<1,1>>>(exec, d_keys.begin(), d_keys.end(), d_vals.begin(), d_output.begin());
{
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
}
ASSERT_EQUAL(d_output, h_output);
thrust::exclusive_scan_by_key(h_keys.begin(), h_keys.end(), h_vals.begin(), h_output.begin());
exclusive_scan_by_key_kernel<<<1,1>>>(exec, d_keys.begin(), d_keys.end(), d_vals.begin(), d_output.begin());
{
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
}
ASSERT_EQUAL(d_output, h_output);
thrust::exclusive_scan_by_key(h_keys.begin(), h_keys.end(), h_vals.begin(), h_output.begin(), 11);
exclusive_scan_by_key_kernel<<<1,1>>>(exec, d_keys.begin(), d_keys.end(), d_vals.begin(), d_output.begin(), 11);
{
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
}
ASSERT_EQUAL(d_output, h_output);
// in-place scans
h_output = h_vals;
d_output = d_vals;
thrust::inclusive_scan_by_key(h_keys.begin(), h_keys.end(), h_output.begin(), h_output.begin());
inclusive_scan_by_key_kernel<<<1,1>>>(exec,d_keys.begin(), d_keys.end(), d_output.begin(), d_output.begin());
{
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
}
ASSERT_EQUAL(d_output, h_output);
h_output = h_vals;
d_output = d_vals;
thrust::exclusive_scan_by_key(h_keys.begin(), h_keys.end(), h_output.begin(), h_output.begin(), 11);
exclusive_scan_by_key_kernel<<<1,1>>>(exec, d_keys.begin(), d_keys.end(), d_output.begin(), d_output.begin(), 11);
{
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
}
ASSERT_EQUAL(d_output, h_output);
}
void TestScanByKeyDeviceSeq()
{
TestScanByKeyDevice(thrust::seq);
}
DECLARE_UNITTEST(TestScanByKeyDeviceSeq);
void TestScanByKeyDeviceDevice()
{
TestScanByKeyDevice(thrust::device);
}
DECLARE_UNITTEST(TestScanByKeyDeviceDevice);
void TestInclusiveScanByKeyCudaStreams()
{
typedef thrust::device_vector<int> Vector;
typedef Vector::value_type T;
typedef Vector::iterator Iterator;
Vector keys(7);
Vector vals(7);
Vector output(7, 0);
keys[0] = 0; vals[0] = 1;
keys[1] = 1; vals[1] = 2;
keys[2] = 1; vals[2] = 3;
keys[3] = 1; vals[3] = 4;
keys[4] = 2; vals[4] = 5;
keys[5] = 3; vals[5] = 6;
keys[6] = 3; vals[6] = 7;
cudaStream_t s;
cudaStreamCreate(&s);
Iterator iter = thrust::inclusive_scan_by_key(thrust::cuda::par.on(s), keys.begin(), keys.end(), vals.begin(), output.begin());
cudaStreamSynchronize(s);
ASSERT_EQUAL_QUIET(iter, output.end());
ASSERT_EQUAL(output[0], 1);
ASSERT_EQUAL(output[1], 2);
ASSERT_EQUAL(output[2], 5);
ASSERT_EQUAL(output[3], 9);
ASSERT_EQUAL(output[4], 5);
ASSERT_EQUAL(output[5], 6);
ASSERT_EQUAL(output[6], 13);
thrust::inclusive_scan_by_key(thrust::cuda::par.on(s), keys.begin(), keys.end(), vals.begin(), output.begin(), thrust::equal_to<T>(), thrust::multiplies<T>());
cudaStreamSynchronize(s);
ASSERT_EQUAL(output[0], 1);
ASSERT_EQUAL(output[1], 2);
ASSERT_EQUAL(output[2], 6);
ASSERT_EQUAL(output[3], 24);
ASSERT_EQUAL(output[4], 5);
ASSERT_EQUAL(output[5], 6);
ASSERT_EQUAL(output[6], 42);
thrust::inclusive_scan_by_key(thrust::cuda::par.on(s), keys.begin(), keys.end(), vals.begin(), output.begin(), thrust::equal_to<T>());
cudaStreamSynchronize(s);
ASSERT_EQUAL(output[0], 1);
ASSERT_EQUAL(output[1], 2);
ASSERT_EQUAL(output[2], 5);
ASSERT_EQUAL(output[3], 9);
ASSERT_EQUAL(output[4], 5);
ASSERT_EQUAL(output[5], 6);
ASSERT_EQUAL(output[6], 13);
cudaStreamDestroy(s);
}
DECLARE_UNITTEST(TestInclusiveScanByKeyCudaStreams);
void TestExclusiveScanByKeyCudaStreams()
{
typedef thrust::device_vector<int> Vector;
typedef Vector::value_type T;
typedef Vector::iterator Iterator;
Vector keys(7);
Vector vals(7);
Vector output(7, 0);
keys[0] = 0; vals[0] = 1;
keys[1] = 1; vals[1] = 2;
keys[2] = 1; vals[2] = 3;
keys[3] = 1; vals[3] = 4;
keys[4] = 2; vals[4] = 5;
keys[5] = 3; vals[5] = 6;
keys[6] = 3; vals[6] = 7;
cudaStream_t s;
cudaStreamCreate(&s);
Iterator iter = thrust::exclusive_scan_by_key(thrust::cuda::par.on(s), keys.begin(), keys.end(), vals.begin(), output.begin());
cudaStreamSynchronize(s);
ASSERT_EQUAL_QUIET(iter, output.end());
ASSERT_EQUAL(output[0], 0);
ASSERT_EQUAL(output[1], 0);
ASSERT_EQUAL(output[2], 2);
ASSERT_EQUAL(output[3], 5);
ASSERT_EQUAL(output[4], 0);
ASSERT_EQUAL(output[5], 0);
ASSERT_EQUAL(output[6], 6);
thrust::exclusive_scan_by_key(thrust::cuda::par.on(s), keys.begin(), keys.end(), vals.begin(), output.begin(), T(10));
cudaStreamSynchronize(s);
ASSERT_EQUAL(output[0], 10);
ASSERT_EQUAL(output[1], 10);
ASSERT_EQUAL(output[2], 12);
ASSERT_EQUAL(output[3], 15);
ASSERT_EQUAL(output[4], 10);
ASSERT_EQUAL(output[5], 10);
ASSERT_EQUAL(output[6], 16);
thrust::exclusive_scan_by_key(thrust::cuda::par.on(s), keys.begin(), keys.end(), vals.begin(), output.begin(), T(10), thrust::equal_to<T>(), thrust::multiplies<T>());
cudaStreamSynchronize(s);
ASSERT_EQUAL(output[0], 10);
ASSERT_EQUAL(output[1], 10);
ASSERT_EQUAL(output[2], 20);
ASSERT_EQUAL(output[3], 60);
ASSERT_EQUAL(output[4], 10);
ASSERT_EQUAL(output[5], 10);
ASSERT_EQUAL(output[6], 60);
thrust::exclusive_scan_by_key(thrust::cuda::par.on(s), keys.begin(), keys.end(), vals.begin(), output.begin(), T(10), thrust::equal_to<T>());
cudaStreamSynchronize(s);
ASSERT_EQUAL(output[0], 10);
ASSERT_EQUAL(output[1], 10);
ASSERT_EQUAL(output[2], 12);
ASSERT_EQUAL(output[3], 15);
ASSERT_EQUAL(output[4], 10);
ASSERT_EQUAL(output[5], 10);
ASSERT_EQUAL(output[6], 16);
}
DECLARE_UNITTEST(TestExclusiveScanByKeyCudaStreams);
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