pitrou commented on code in PR #40699:
URL: https://github.com/apache/arrow/pull/40699#discussion_r1537884230
##########
cpp/src/arrow/gpu/cuda_memory.cc:
##########
@@ -501,5 +502,27 @@ Result<std::shared_ptr<MemoryManager>>
DefaultMemoryMapper(ArrowDeviceType devic
}
}
+Result<std::shared_ptr<MemoryManager>> DefaultGPUMemoryMapper(int64_t
device_id) {
+ ARROW_ASSIGN_OR_RAISE(auto device, arrow::cuda::CudaDevice::Make(device_id));
+ return device->default_memory_manager();
+}
+
+Status RegisterCUDADeviceInternal() {
+ RETURN_NOT_OK(
+ RegisterDeviceMemoryManager(DeviceAllocationType::kCUDA,
DefaultGPUMemoryMapper));
+ RETURN_NOT_OK(RegisterDeviceMemoryManager(DeviceAllocationType::kCUDA_HOST,
+ DefaultGPUMemoryMapper));
+
RETURN_NOT_OK(RegisterDeviceMemoryManager(DeviceAllocationType::kCUDA_MANAGED,
+ DefaultGPUMemoryMapper));
+ return Status::OK();
+}
+
+std::once_flag cuda_registered;
+
+Status RegisterCUDADevice() {
Review Comment:
Is there a reason for not doing this automatically at initialization rather
than have the user call it explicitly?
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