MS-544 fix

Former-commit-id: 2d9d4afb74ce2522b8cf5bf29ade982d3d6722ad

cpp/src/core/src/knowhere/index/vector_index/gpu_ivf.cpp

@@ -26,17 +26,17 @@ namespace knowhere {
 
 IndexModelPtr GPUIVF::Train(const DatasetPtr &dataset, const Config &config) {
     auto nlist = config["nlist"].as<size_t>();
-    auto gpu_device = config.get_with_default("gpu_id", gpu_id_);
+    gpu_id_ = config.get_with_default("gpu_id", gpu_id_);
     auto metric_type = config["metric_type"].as_string() == "L2" ?
                        faiss::METRIC_L2 : faiss::METRIC_INNER_PRODUCT;
 
     GETTENSOR(dataset)
 
-    auto temp_resource = FaissGpuResourceMgr::GetInstance().GetRes(gpu_device);
+    auto temp_resource = FaissGpuResourceMgr::GetInstance().GetRes(gpu_id_);
     if (temp_resource != nullptr) {
-        ResScope rs(gpu_device, temp_resource);
+        ResScope rs(gpu_id_, temp_resource);
         faiss::gpu::GpuIndexIVFFlatConfig idx_config;
-        idx_config.device = gpu_device;
+        idx_config.device = gpu_id_;
         faiss::gpu::GpuIndexIVFFlat device_index(temp_resource->faiss_res.get(), dim, nlist, metric_type, idx_config);
         device_index.train(rows, (float *) p_data);
 
@@ -204,7 +204,7 @@ VectorIndexPtr GPUIVFPQ::CopyGpuToCpu(const Config &config) {
 IndexModelPtr GPUIVFSQ::Train(const DatasetPtr &dataset, const Config &config) {
     auto nlist = config["nlist"].as<size_t>();
     auto nbits = config["nbits"].as<size_t>(); // TODO(linxj):  gpu only support SQ4 SQ8 SQ16
-    auto gpu_num = config.get_with_default("gpu_id", gpu_id_);
+    gpu_id_ = config.get_with_default("gpu_id", gpu_id_);
     auto metric_type = config["metric_type"].as_string() == "L2" ?
                        faiss::METRIC_L2 : faiss::METRIC_INNER_PRODUCT;
 
@@ -214,10 +214,10 @@ IndexModelPtr GPUIVFSQ::Train(const DatasetPtr &dataset, const Config &config) {
     index_type << "IVF" << nlist << "," << "SQ" << nbits;
     auto build_index = faiss::index_factory(dim, index_type.str().c_str(), metric_type);
 
-    auto temp_resource = FaissGpuResourceMgr::GetInstance().GetRes(gpu_num);
+    auto temp_resource = FaissGpuResourceMgr::GetInstance().GetRes(gpu_id_);
     if (temp_resource != nullptr) {
-        ResScope rs(gpu_num, temp_resource  );
-        auto device_index = faiss::gpu::index_cpu_to_gpu(temp_resource->faiss_res.get(), gpu_num, build_index);
+        ResScope rs(gpu_id_, temp_resource  );
+        auto device_index = faiss::gpu::index_cpu_to_gpu(temp_resource->faiss_res.get(), gpu_id_, build_index);
         device_index->train(rows, (float *) p_data);
 
         std::shared_ptr<faiss::Index> host_index = nullptr;