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#include <torch/csrc/distributed/c10d/Utils.hpp>
#include <cstring>
namespace c10d {
std::vector<at::Tensor> getTensorShapes(
const std::vector<at::Tensor>& tensors) {
std::vector<at::Tensor> shapeTensors;
shapeTensors.reserve(tensors.size());
for (const auto& tensor : tensors) {
// Use `at::tensor()` to copy the data underlying `sizes()` since it may be
// released elsewhere.
at::Tensor shapesTensor =
at::tensor(tensor.sizes(), at::TensorOptions().dtype(at::kLong));
shapeTensors.emplace_back(std::move(shapesTensor));
}
return shapeTensors;
}
size_t getTensorsNumel(const std::vector<at::Tensor>& tensors) {
size_t numel = 0;
for (auto& tensor : tensors) {
numel += tensor.numel();
}
return numel;
}
} // namespace c10d
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