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Enable string-based UID for GPUs #842

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Enable string-based UID for GPUs #842

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c834d90
Enable string-based UID for GPU selection
mlxd Aug 8, 2024
6822e08
Fix return type of UID func
mlxd Aug 8, 2024
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10 changes: 9 additions & 1 deletion pennylane_lightning/core/src/bindings/BindingsCudaUtils.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,15 @@ void registerCudaUtils(py::module_ &m) {
.def("syncDevice", &DevicePool<int>::syncDevice)
.def("refresh", &DevicePool<int>::refresh)
.def_static("getTotalDevices", &DevicePool<int>::getTotalDevices)
.def_static("getDeviceUIDs", &DevicePool<int>::getDeviceUIDs)
.def_static("getDeviceUIDs", [](){
auto data = DevicePool<int>::getDeviceUIDs();
std::vector<py::bytes> data_conv;
data_conv.reserve(data.size());
for(auto d : data){
data_conv.push_back(py::bytes(std::move(d)));
}
return data_conv;
})
.def_static("setDeviceID", &DevicePool<int>::setDeviceIdx)
.def(py::pickle(
[]([[maybe_unused]] const DevicePool<int> &self) { // __getstate__
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6 changes: 3 additions & 3 deletions pennylane_lightning/core/src/utils/cuda_utils/DevicePool.hpp
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Expand Up @@ -127,15 +127,15 @@ template <typename DeviceIndexType = int> class DevicePool {
*
* @return std::vector<cudaUUID_t>
*/
static std::vector<cudaUUID_t> getDeviceUIDs() {
static std::vector<std::string> getDeviceUIDs() {
int deviceCount;
cudaGetDeviceCount(&deviceCount);
int device;
std::vector<cudaUUID_t> dev_uid(deviceCount);
std::vector<std::string> dev_uid(deviceCount);
for (device = 0; device < deviceCount; device++) {
cudaDeviceProp deviceProp;
cudaGetDeviceProperties(&deviceProp, device);
dev_uid[device] = deviceProp.uuid;
dev_uid[device] = std::string(deviceProp.uuid.bytes);
}
return dev_uid;
}
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