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Async data transfer in DISC backend #21

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Merged
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Nov 27, 2024
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Async data transfer in DISC backend #21

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10 changes: 5 additions & 5 deletions torch_xla/csrc/runtime/disc_computation_client.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -135,19 +135,19 @@ std::vector<ComputationClient::DataPtr> DISCComputationClient::TransferToDevice(

auto dtype =
at::TensorOptions(TorchTypeFromXlaType(tensor->shape().element_type()));
auto ret = at::empty(sizes, dtype).contiguous();
auto ret = at::empty(sizes, dtype.pinned_memory(true)).contiguous();
// tensor->populate_fn(tensor, ret.data_ptr(),
// ret.element_size() * ret.numel());
std::memcpy(ret.data_ptr(), tensor->data(),
ret.element_size() * ret.numel());
auto transfered_bytes = ret.element_size() * ret.numel();
std::memcpy(ret.data_ptr(), tensor->data(), transfered_bytes);

total_transfered_bytes += ret.element_size() * ret.numel();
total_transfered_bytes += transfered_bytes;

if (!torch::cuda::is_available()) {
XLA_ERROR() << "CUDA is not available.";
}

auto device_ret = ret.to(at::kCUDA);
auto device_ret = ret.to(at::kCUDA, /*non_blocking*/ true);
ComputationClient::DataPtr data = std::make_shared<DISCData>(
tensor->device(), tensor->shape(), device_ret);
datas.push_back(data);
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