В настоящее время я пытаюсь использовать функцию тяги::upper_bound. У меня возникла проблема с аргументами, которые я передаю функции. Я хотел бы использовать векторные типы CUDA, в частности double3
, но когда я использую этот тип, я получаю несколько ошибок библиотеки тяги.
Блок кода, который я запускаю, приведен ниже:
/********************************************************************************
eos_search_gpu()
purpose --- kernel to find the upper bound index for the
interpolation values
arguments --
y --- input double3 values for which we are searching
my --- input int number of values for which we are searching
x --- input double3 array of structs containin the data table
values for x, y, and f corresponding to structs
".x", ".y", and ".z"
n --- input int number of data values in the table
dim_x --- input int number of data values in the x-direcion of table
j[] --- input/output int[] array of int'sthat contains
the index of the (x,y,f) position of the upper bound
library calls --
__host__ __device__ ForwardIterator thrust::upper_bound(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
ForwardIterator first,
ForwardIterator last,
const LessThanComparable & value
)
exec --- the execution policy to use for parallelization
first --- the beginning of the ordered sequence
last --- the end of the ordered sequence
value --- the value to be searched.
Returns: the furthermost iterator i, such that value < *i is false
const detail::seq_t thrust::seq
an execution policy which requires analgorithm invocation to execute
sequentially in the current thread.
********************************************************************************/
__global__ void eos_search_gpu(const double3* y, const int my,
const double3* x, const int n,
const int dim_x, int * j){
int i = threadIdx.x + blockDim.x * blockIdx.x;
if ( i < my) {
const double ptr = thrust::upper_bound(thrust::seq, x[0].y , x[n-1].y, y[i].y);
j[i] = (ptr - x[i].y - 1);
}
}
Отображаемые сообщения об ошибках следующие:
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/iterator/iterator_traits.h(45): error: a class or namespace qualified name is required
detected during:
instantiation of class "thrust::iterator_traits<T> [with T=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/iterator/detail/iterator_traits.inl(53): here
instantiation of class "thrust::iterator_difference<Iterator> [with Iterator=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/system/detail/sequential/binary_search.h(102): here
instantiation of "ForwardIterator thrust::system::detail::sequential::upper_bound(thrust::system::detail::sequential::execution_policy<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &, StrictWeakOrdering) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double, StrictWeakOrdering=thrust::system::detail::generic::detail::binary_search_less]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/detail/binary_search.inl(83): here
instantiation of "ForwardIterator thrust::upper_bound(const thrust::detail::execution_policy_base<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &, StrictWeakOrdering) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double, StrictWeakOrdering=thrust::system::detail::generic::detail::binary_search_less]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/system/detail/generic/binary_search.inl(225): here
instantiation of "ForwardIterator thrust::system::detail::generic::upper_bound(thrust::execution_policy<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/detail/binary_search.inl(69): here
instantiation of "ForwardIterator thrust::upper_bound(const thrust::detail::execution_policy_base<DerivedPolicy> &, ForwardIterator, ForwardIterator, const LessThanComparable &) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, LessThanComparable=double]"
Interpolation_cuda.cu(254): here
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/iterator/iterator_traits.h(45): error: global-scope qualifier (leading "::") is not allowed
detected during:
instantiation of class "thrust::iterator_traits<T> [with T=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/iterator/detail/iterator_traits.inl(53): here
instantiation of class "thrust::iterator_difference<Iterator> [with Iterator=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/system/detail/sequential/binary_search.h(102): here
instantiation of "ForwardIterator thrust::system::detail::sequential::upper_bound(thrust::system::detail::sequential::execution_policy<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &, StrictWeakOrdering) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double, StrictWeakOrdering=thrust::system::detail::generic::detail::binary_search_less]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/detail/binary_search.inl(83): here
instantiation of "ForwardIterator thrust::upper_bound(const thrust::detail::execution_policy_base<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &, StrictWeakOrdering) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double, StrictWeakOrdering=thrust::system::detail::generic::detail::binary_search_less]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/system/detail/generic/binary_search.inl(225): here
instantiation of "ForwardIterator thrust::system::detail::generic::upper_bound(thrust::execution_policy<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/detail/binary_search.inl(69): here
instantiation of "ForwardIterator thrust::upper_bound(const thrust::detail::execution_policy_base<DerivedPolicy> &, ForwardIterator, ForwardIterator, const LessThanComparable &) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, LessThanComparable=double]"
Interpolation_cuda.cu(254): here
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/iterator/iterator_traits.h(45): error: expected a ";"
detected during:
instantiation of class "thrust::iterator_traits<T> [with T=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/iterator/detail/iterator_traits.inl(53): here
instantiation of class "thrust::iterator_difference<Iterator> [with Iterator=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/system/detail/sequential/binary_search.h(102): here
instantiation of "ForwardIterator thrust::system::detail::sequential::upper_bound(thrust::system::detail::sequential::execution_policy<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &, StrictWeakOrdering) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double, StrictWeakOrdering=thrust::system::detail::generic::detail::binary_search_less]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/detail/binary_search.inl(83): here
instantiation of "ForwardIterator thrust::upper_bound(const thrust::detail::execution_policy_base<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &, StrictWeakOrdering) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double, StrictWeakOrdering=thrust::system::detail::generic::detail::binary_search_less]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/system/detail/generic/binary_search.inl(225): here
instantiation of "ForwardIterator thrust::system::detail::generic::upper_bound(thrust::execution_policy<DerivedPolicy> &, ForwardIterator, ForwardIterator, const T &) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, T=double]"
/opt/cudatoolkit/9.1/bin/../targets/x86_64-linux/include/thrust/detail/binary_search.inl(69): here
instantiation of "ForwardIterator thrust::upper_bound(const thrust::detail::execution_policy_base<DerivedPolicy> &, ForwardIterator, ForwardIterator, const LessThanComparable &) [with DerivedPolicy=thrust::detail::seq_t, ForwardIterator=double, LessThanComparable=double]"
Interpolation_cuda.cu(254): here
Мне интересно, поддерживает ли тяга использование векторных типов CUDA или я просто делаю что-то неправильно.