Repository: ggml-org/llama.cpp
Pull request: docker : add cann build pipline

This pull request significantly enhances the build process for `llama.cpp` with Huawei's CANN backend.

Changed files:
filename: .devops/cann.Dockerfile
patch: @@ -0,0 +1,130 @@
+# ==============================================================================
+# ARGUMENTS
+# ==============================================================================
+
+# Define the CANN base image for easier version updates later
+ARG CANN_BASE_IMAGE=quay.io/ascend/cann:8.1.rc1-910b-openeuler22.03-py3.10
+
+# ==============================================================================
+# BUILD STAGE
+# Compile all binary files and libraries
+# ==============================================================================
+FROM ${CANN_BASE_IMAGE} AS build
+
+# Define the Ascend chip model for compilation. Default is Ascend910B3
+ARG ASCEND_SOC_TYPE=Ascend910B3
+
+# -- Install build dependencies --
+RUN yum install -y gcc g++ cmake make git libcurl-devel python3 python3-pip && \
+    yum clean all && \
+    rm -rf /var/cache/yum
+
+# -- Set the working directory --
+WORKDIR /app
+
+# -- Copy project files --
+COPY . .
+
+# -- Set CANN environment variables (required for compilation) --
+# Using ENV instead of `source` allows environment variables to persist across the entire image layer
+ENV ASCEND_TOOLKIT_HOME=/usr/local/Ascend/ascend-toolkit/latest
+ENV LD_LIBRARY_PATH=${ASCEND_TOOLKIT_HOME}/lib64:${LD_LIBRARY_PATH}
+ENV PATH=${ASCEND_TOOLKIT_HOME}/bin:${PATH}
+ENV ASCEND_OPP_PATH=${ASCEND_TOOLKIT_HOME}/opp
+ENV LD_LIBRARY_PATH=${ASCEND_TOOLKIT_HOME}/runtime/lib64/stub:$LD_LIBRARY_PATH
+# ... You can add other environment variables from the original file as needed ...
+# For brevity, only core variables are listed here. You can paste the original ENV list here.
+
+# -- Build llama.cpp --
+# Use the passed ASCEND_SOC_TYPE argument and add general build options
+RUN source /usr/local/Ascend/ascend-toolkit/set_env.sh --force \
+    && \
+    cmake -B build \
+        -DGGML_CANN=ON \
+        -DCMAKE_BUILD_TYPE=Release \
+        -DSOC_TYPE=${ASCEND_SOC_TYPE} \
+        . && \
+    cmake --build build --config Release -j$(nproc)
+
+# -- Organize build artifacts for copying in later stages --
+# Create a lib directory to store all .so files
+RUN mkdir -p /app/lib && \
+    find build -name "*.so" -exec cp {} /app/lib \;
+
+# Create a full directory to store all executables and Python scripts
+RUN mkdir -p /app/full && \
+    cp build/bin/* /app/full/ && \
+    cp *.py /app/full/ && \
+    cp -r gguf-py /app/full/ && \
+    cp -r requirements /app/full/ && \
+    cp requirements.txt /app/full/
+    # If you have a tools.sh script, make sure it is copied here
+    # cp .devops/tools.sh /app/full/tools.sh
+
+# ==============================================================================
+# BASE STAGE
+# Create a minimal base image with CANN runtime and common libraries
+# ==============================================================================
+FROM ${CANN_BASE_IMAGE} AS base
+
+# -- Install runtime dependencies --
+RUN yum install -y libgomp curl && \
+    yum clean all && \
+    rm -rf /var/cache/yum
+
+# -- Set CANN environment variables (required for runtime) --
+ENV ASCEND_TOOLKIT_HOME=/usr/local/Ascend/ascend-toolkit/latest
+ENV LD_LIBRARY_PATH=/app:${ASCEND_TOOLKIT_HOME}/lib64:${LD_LIBRARY_PATH}
+ENV PATH=${ASCEND_TOOLKIT_HOME}/bin:${PATH}
+ENV ASCEND_OPP_PATH=${ASCEND_TOOLKIT_HOME}/opp
+# ... You can add other environment variables from the original file as needed ...
+
+WORKDIR /app
+
+# Copy compiled .so files from the build stage
+COPY --from=build /app/lib/ /app
+
+# ==============================================================================
+# FINAL STAGES (TARGETS)
+# ==============================================================================
+
+### Target: full
+# Complete image with all tools, Python bindings, and dependencies
+# ==============================================================================
+FROM base AS full
+
+COPY --from=build /app/full /app
+
+# Install Python dependencies
+RUN yum install -y git python3 python3-pip && \
+    pip3 install --no-cache-dir --upgrade pip setuptools wheel && \
+    pip3 install --no-cache-dir -r requirements.txt && \
+    yum clean all && \
+    rm -rf /var/cache/yum
+
+# You need to provide a tools.sh script as the entrypoint
+ENTRYPOINT ["/app/tools.sh"]
+# If there is no tools.sh, you can set the default to start the server
+# ENTRYPOINT ["/app/llama-server"]
+
+### Target: light
+# Lightweight image containing only llama-cli
+# ==============================================================================
+FROM base AS light
+
+COPY --from=build /app/full/llama-cli /app
+
+ENTRYPOINT [ "/app/llama-cli" ]
+
+### Target: server
+# Dedicated server image containing only llama-server
+# ==============================================================================
+FROM base AS server
+
+ENV LLAMA_ARG_HOST=0.0.0.0
+
+COPY --from=build /app/full/llama-server /app
+
+HEALTHCHECK --interval=5m CMD [ "curl", "-f", "http://localhost:8080/health" ]
+
+ENTRYPOINT [ "/app/llama-server" ]

filename: ggml/src/ggml-cann/ggml-cann.cpp
patch: @@ -2016,6 +2016,9 @@ static bool ggml_backend_cann_cpy_tensor_async(
         (ggml_backend_cann_context*)backend_dst->context;
 
     size_t copy_size = ggml_nbytes(dst);
+    if (copy_size == 0) {
+        return true;
+    }
     if (backend_src != backend_dst) {
         ggml_backend_cann_buffer_context* buf_ctx_src =
             (ggml_backend_cann_buffer_context*)buf_src->context;