ReneEnjilian opened a new pull request, #2311: URL: https://github.com/apache/systemds/pull/2311
This PR starts the implementation of custom Java–CUDA bindings for SystemDS, called **cujava**. The long-term goal is to replace **JCuda** altogether. The project is split into a Java layer and a C++/JNI layer. In this PR I’ve focused on the **runtime** and laid the foundation for the remaining modules. ### Project structure `src/main/java/org.apache.sysds/cujava:` **cujava/ ├─ cublas/ ├─ cudnn/ ├─ cusolver/ ├─ cusparse/ ├─ driver/ ├─ interop/ └─ runtime/ ----├─ CudaDeviceProp ----├─ CudaError ----├─ CudaMemcpyKind ----└─ CuJava CudaDataType CudaException CuJavaLibLoader NativePointerObject Pointer Sizeof** Each directory contains the corresponding Java-side implementation. So far, I have focused on the runtime package. `src/main/cpp/jni:` **jni/ ├─ common/ ├─ cublas/ ├─ cudnn/ ├─ cusolver/ ├─ cusparse/ ├─ driver/ └─ runtime/ build_cujava_libs.sh CMakeLists.txt** These directories hold the C++/JNI implementations that mirror the Java side. Each directory has its own CMakeLists.txt to produce a dedicated shared library. The libraries are emitted under `src/main/cpp/lib`. In this PR I implemented the initial parts of runtime and common; the rest will follow in the next PRs. ### Example usage Writing code with cuJava is reminiscent of JCuda—only the imports change: `import org.apache.sysds.cujava.runtime.CuJava;` `CuJava.cudaMalloc(...);` ### Notes - **Parallel to JCuda:** cuJava currently exists alongside JCuda and is not integrated into the SystemDS GPU backend yet. The existing GPU backend remains unchanged and continues to use JCuda. The newly added cuJava runtime methods have been tested successfully. - **API scope:** cuJava intentionally implements only the CUDA/NVIDIA library calls that SystemDS actually uses. This downsized approach—contrary to JCuda’s full coverage—enables faster upgrades to newer CUDA versions: we only need to update deprecated APIs we rely on. In contrast, JCuda must update every deprecated method, which is cumbersome and wasteful. @mboehm7 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@systemds.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
