| # llama.cpp for IBM zDNN Accelerator |
|
|
| > [!WARNING] |
| > **Note:** zDNN is **not** the same as ZenDNN. |
| > - **zDNN** (this page): IBM's Deep Neural Network acceleration library for IBM Z & LinuxONE Mainframes |
| > - **ZenDNN**: AMD's deep learning library for AMD EPYC CPUs ([see ZenDNN documentation](ZenDNN.md)) |
|
|
| ## Background |
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| IBM zDNN (Z Deep Neural Network) is a hardware acceleration library designed specifically to leverage the IBM NNPA (Neural Network Processor Assist) accelerator located within IBM Telum I and II processors. It provides significant performance improvements for neural network inference operations. |
|
|
| ### Llama.cpp + IBM zDNN |
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| The llama.cpp zDNN backend is designed to enable llama.cpp on IBM z17 and later systems via the IBM zDNN hardware acceleration library. |
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|
| ## Software & Hardware Support |
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|
| | Hardware Level | Status | Verified | |
| | -------------------- | ------------- | -------------------------- | |
| | IBM z17 / LinuxONE 5 | Supported | RHEL 9.6, IBM z17, 40 IFLs | |
| | IBM z16 / LinuxONE 4 | Not Supported | | |
|
|
| ## Data Types Supported |
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|
| | Data Type | Status | |
| | --------- | --------- | |
| | F32 | Supported | |
| | F16 | Supported | |
| | BF16 | Supported | |
|
|
| ## CMake Options |
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| The IBM zDNN backend has the following CMake options that control the behaviour of the backend. |
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| | CMake Option | Default Value | Description | |
| | ------------ | ------------- | ----------------------------------- | |
| | `GGML_ZDNN` | `OFF` | Compile llama.cpp with zDNN support | |
| | `ZDNN_ROOT` | `""` | Override zDNN library lookup | |
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|
| ## 1. Install zDNN Library |
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| Note: Using the zDNN library provided via `apt` or `yum` may not work correctly as reported in [#15772](https://github.com/ggml-org/llama.cpp/issues/15772). It is preferred that you compile from source. |
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|
| ```sh |
| git clone --recurse-submodules https://github.com/IBM/zDNN |
| cd zDNN |
| |
| autoreconf . |
| ./configure --prefix=/opt/zdnn-libs |
| |
| make build |
| sudo make install |
| ``` |
|
|
| ## 2. Build llama.cpp |
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|
| ```sh |
| git clone https://github.com/ggml-org/llama.cpp |
| cd llama.cpp |
| |
| cmake -S . -G Ninja -B build \ |
| -DCMAKE_BUILD_TYPE=Release \ |
| -DGGML_ZDNN=ON \ |
| -DZDNN_ROOT=/opt/zdnn-libs |
| cmake --build build --config Release -j$(nproc) |
| ``` |
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|
