Inference of LLaMA model in pure C/C++
Hot topics:
- Roadmap June 2023: ggerganov#1729
- GPU support with Metal (Apple Silicon): ggerganov#1642
- High-quality 2,3,4,5,6-bit quantization: ggerganov#1684
- Multi-GPU support: ggerganov#1607
- Training LLaMA models from scratch: ggerganov#1652
- CPU threading improvements: ggerganov#1632
Table of Contents
- Description
-
Usage
- Get the Code
- Build
- BLAS Build
- Prepare Data & Run
- Memory/Disk Requirements
- Quantization
- Interactive mode
- Instruction mode with Alpaca
- Using GPT4All
- Using Pygmalion 7B & Metharme 7B
- Obtaining the Facebook LLaMA original model and Stanford Alpaca model data
- Verifying the model files
- Seminal papers and background on the models
- Perplexity (measuring model quality)
- Android
- Docker
- Contributing
- Coding guidelines
- Docs
The main goal of llama.cpp
is to run the LLaMA model using 4-bit integer quantization on a MacBook
- Plain C/C++ implementation without dependencies
- Apple silicon first-class citizen - optimized via ARM NEON, Accelerate and Metal frameworks
- AVX, AVX2 and AVX512 support for x86 architectures
- Mixed F16 / F32 precision
- 4-bit, 5-bit and 8-bit integer quantization support
- Supports OpenBLAS/Apple BLAS/ARM Performance Lib/ATLAS/BLIS/Intel MKL/NVHPC/ACML/SCSL/SGIMATH and more in BLAS
- cuBLAS and CLBlast support
The original implementation of llama.cpp
was hacked in an evening.
Since then, the project has improved significantly thanks to many contributions. This project is for educational purposes and serves
as the main playground for developing new features for the ggml library.
Supported platforms:
- Mac OS
- Linux
- Windows (via CMake)
- Docker
Supported models:
- LLaMA 🦙
- Alpaca
- GPT4All
- Chinese LLaMA / Alpaca
- Vigogne (French)
- Vicuna
- Koala
- OpenBuddy 🐶 (Multilingual)
- Pygmalion 7B / Metharme 7B
- WizardLM
Bindings:
- Python: abetlen/llama-cpp-python
- Go: go-skynet/go-llama.cpp
- Node.js: hlhr202/llama-node
- Ruby: yoshoku/llama_cpp.rb
- C#/.NET: SciSharp/LLamaSharp
UI:
Here is a typical run using LLaMA-7B:
make -j && ./main -m ./models/7B/ggml-model-q4_0.bin -p "Building a website can be done in 10 simple steps:" -n 512
I llama.cpp build info:
I UNAME_S: Darwin
I UNAME_P: arm
I UNAME_M: arm64
I CFLAGS: -I. -O3 -DNDEBUG -std=c11 -fPIC -pthread -DGGML_USE_ACCELERATE
I CXXFLAGS: -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread
I LDFLAGS: -framework Accelerate
I CC: Apple clang version 14.0.0 (clang-1400.0.29.202)
I CXX: Apple clang version 14.0.0 (clang-1400.0.29.202)
make: Nothing to be done for `default'.
main: seed = 1678486056
llama_model_load: loading model from './models/7B/ggml-model-q4_0.bin' - please wait ...
llama_model_load: n_vocab = 32000
llama_model_load: n_ctx = 512
llama_model_load: n_embd = 4096
llama_model_load: n_mult = 256
llama_model_load: n_head = 32
llama_model_load: n_layer = 32
llama_model_load: n_rot = 128
llama_model_load: f16 = 2
llama_model_load: n_ff = 11008
llama_model_load: ggml ctx size = 4529.34 MB
llama_model_load: memory_size = 512.00 MB, n_mem = 16384
llama_model_load: .................................... done
llama_model_load: model size = 4017.27 MB / num tensors = 291
main: prompt: 'Building a website can be done in 10 simple steps:'
main: number of tokens in prompt = 15
1 -> ''
8893 -> 'Build'
292 -> 'ing'
263 -> ' a'
4700 -> ' website'
508 -> ' can'
367 -> ' be'
2309 -> ' done'
297 -> ' in'
29871 -> ' '
29896 -> '1'
29900 -> '0'
2560 -> ' simple'
6576 -> ' steps'
29901 -> ':'
sampling parameters: temp = 0.800000, top_k = 40, top_p = 0.950000
Building a website can be done in 10 simple steps:
1) Select a domain name and web hosting plan
2) Complete a sitemap
3) List your products
4) Write product descriptions
5) Create a user account
6) Build the template
7) Start building the website
8) Advertise the website
9) Provide email support
10) Submit the website to search engines
A website is a collection of web pages that are formatted with HTML. HTML is the code that defines what the website looks like and how it behaves.
The HTML code is formatted into a template or a format. Once this is done, it is displayed on the user's browser.
The web pages are stored in a web server. The web server is also called a host. When the website is accessed, it is retrieved from the server and displayed on the user's computer.
A website is known as a website when it is hosted. This means that it is displayed on a host. The host is usually a web server.
A website can be displayed on different browsers. The browsers are basically the software that renders the website on the user's screen.
A website can also be viewed on different devices such as desktops, tablets and smartphones.
Hence, to have a website displayed on a browser, the website must be hosted.
A domain name is an address of a website. It is the name of the website.
The website is known as a website when it is hosted. This means that it is displayed on a host. The host is usually a web server.
A website can be displayed on different browsers. The browsers are basically the software that renders the website on the user’s screen.
A website can also be viewed on different devices such as desktops, tablets and smartphones. Hence, to have a website displayed on a browser, the website must be hosted.
A domain name is an address of a website. It is the name of the website.
A website is an address of a website. It is a collection of web pages that are formatted with HTML. HTML is the code that defines what the website looks like and how it behaves.
The HTML code is formatted into a template or a format. Once this is done, it is displayed on the user’s browser.
A website is known as a website when it is hosted
main: mem per token = 14434244 bytes
main: load time = 1332.48 ms
main: sample time = 1081.40 ms
main: predict time = 31378.77 ms / 61.41 ms per token
main: total time = 34036.74 ms
And here is another demo of running both LLaMA-7B and whisper.cpp on a single M1 Pro MacBook:
whisper-llama-lq.mp4
Here are the steps for the LLaMA-7B model.
git clone https://github.com/ggerganov/llama.cpp
cd llama.cpp
In order to build llama.cpp you have three different options.
-
Using
make
:-
On Linux or MacOS:
make
-
On Windows:
- Download the latest fortran version of w64devkit.
- Extract
w64devkit
on your pc. - Run
w64devkit.exe
. - Use the
cd
command to reach thellama.cpp
folder. - From here you can run:
make
-
-
Using
CMake
:mkdir build cd build cmake .. cmake --build . --config Release
-
Using
Zig
:zig build -Drelease-fast
Using Metal allows the computation to be executed on the GPU for Apple devices:
-
Using
make
:LLAMA_METAL=1 make
-
Using
CMake
:mkdir build-metal cd build-metal cmake -DLLAMA_METAL=ON .. cmake --build . --config Release
When built with Metal support, you can enable GPU inference with the --gpu-layers|-ngl
command-line argument.
Any value larger than 0 will offload the computation to the GPU. For example:
./main -m ./models/7B/ggml-model-q4_0.bin -n 128 -ngl 1
Building the program with BLAS support may lead to some performance improvements in prompt processing using batch sizes higher than 32 (the default is 512). BLAS doesn't affect the normal generation performance. There are currently three different implementations of it:
-
This is only available on Mac PCs and it's enabled by default. You can just build using the normal instructions.
-
This provides BLAS acceleration using only the CPU. Make sure to have OpenBLAS installed on your machine.
-
Using
make
:-
On Linux:
make LLAMA_OPENBLAS=1
-
On Windows:
-
Download the latest fortran version of w64devkit.
-
Download the latest version of OpenBLAS for Windows.
-
Extract
w64devkit
on your pc. -
From the OpenBLAS zip that you just downloaded copy
libopenblas.a
, located inside thelib
folder, insidew64devkit\x86_64-w64-mingw32\lib
. -
From the same OpenBLAS zip copy the content of the
include
folder insidew64devkit\x86_64-w64-mingw32\include
. -
Run
w64devkit.exe
. -
Use the
cd
command to reach thellama.cpp
folder. -
From here you can run:
make LLAMA_OPENBLAS=1
-
-
-
Using
CMake
on Linux:mkdir build cd build cmake .. -DLLAMA_BLAS=ON -DLLAMA_BLAS_VENDOR=OpenBLAS cmake --build . --config Release
-
-
Check BLIS.md for more information.
-
By default,
LLAMA_BLAS_VENDOR
is set toGeneric
, so if you already sourced intel environment script and assign-DLLAMA_BLAS=ON
in cmake, the mkl version of Blas will automatically been selected. You may also specify it by:mkdir build cd build cmake .. -DLLAMA_BLAS=ON -DLLAMA_BLAS_VENDOR=Intel10_64lp -DCMAKE_C_COMPILER=icx -DCMAKE_CXX_COMPILER=icpx cmake --build . --config Release
-
This provides BLAS acceleration using the CUDA cores of your Nvidia GPU. Make sure to have the CUDA toolkit installed. You can download it from your Linux distro's package manager or from here: CUDA Toolkit.
-
Using
make
:make LLAMA_CUBLAS=1
-
Using
CMake
:mkdir build cd build cmake .. -DLLAMA_CUBLAS=ON cmake --build . --config Release
The environment variable
CUDA_VISIBLE_DEVICES
can be used to specify which GPU(s) will be used. -
-
OpenCL acceleration is provided by the matrix multiplication kernels from the CLBlast project and custom kernels for ggml that can generate tokens on the GPU.
You will need the OpenCL SDK.
-
For Ubuntu or Debian, the packages
opencl-headers
,ocl-icd
may be needed. -
Installing the OpenCL SDK from source
git clone --recurse-submodules https://github.com/KhronosGroup/OpenCL-SDK.git mkdir OpenCL-SDK/build cd OpenCL-SDK/build cmake .. -DBUILD_DOCS=OFF \ -DBUILD_EXAMPLES=OFF \ -DBUILD_TESTING=OFF \ -DOPENCL_SDK_BUILD_SAMPLES=OFF \ -DOPENCL_SDK_TEST_SAMPLES=OFF cmake --build . --config Release cmake --install . --prefix /some/path
Installing CLBlast: it may be found in your operating system's packages.
-
If not, then installing from source:
git clone https://github.com/CNugteren/CLBlast.git mkdir CLBlast/build cd CLBLast/build cmake .. -DBUILD_SHARED_LIBS=OFF -DTUNERS=OFF cmake --build . --config Release cmake --install . --prefix /some/path
Where
/some/path
is where the built library will be installed (default is/usr/local
).
Building:
- Build with make:
make LLAMA_CLBLAST=1
- CMake:
mkdir build cd build cmake .. -DLLAMA_CLBLAST=ON -DCLBlast_dir=/some/path cmake --build . --config Release
Running:
The CLBlast build supports
--gpu-layers|-ngl
like the CUDA version does.To select the correct platform (driver) and device (GPU), you can use the environment variables
GGML_OPENCL_PLATFORM
andGGML_OPENCL_DEVICE
. The selection can be a number (starting from 0) or a text string to search:GGML_OPENCL_PLATFORM=1 ./main ... GGML_OPENCL_DEVICE=2 ./main ... GGML_OPENCL_PLATFORM=Intel ./main ... GGML_OPENCL_PLATFORM=AMD GGML_OPENCL_DEVICE=1 ./main ...
The default behavior is to find the first GPU device, but when it is an integrated GPU on a laptop, for instance, the selectors are useful. Using the variables it is possible to select a CPU-based driver as well, if so desired.
You can get a list of platforms and devices from the
clinfo -l
command, etc. -
# obtain the original LLaMA model weights and place them in ./models
ls ./models
65B 30B 13B 7B tokenizer_checklist.chk tokenizer.model
# install Python dependencies
python3 -m pip install -r requirements.txt
# convert the 7B model to ggml FP16 format
python3 convert.py models/7B/
# quantize the model to 4-bits (using q4_0 method)
./quantize ./models/7B/ggml-model-f16.bin ./models/7B/ggml-model-q4_0.bin q4_0
# run the inference
./main -m ./models/7B/ggml-model-q4_0.bin -n 128
When running the larger models, make sure you have enough disk space to store all the intermediate files.
As the models are currently fully loaded into memory, you will need adequate disk space to save them and sufficient RAM to load them. At the moment, memory and disk requirements are the same.
Model | Original size | Quantized size (4-bit) |
---|---|---|
7B | 13 GB | 3.9 GB |
13B | 24 GB | 7.8 GB |
30B | 60 GB | 19.5 GB |
65B | 120 GB | 38.5 GB |
Several quantization methods are supported. They differ in the resulting model disk size and inference speed.
Model | Measure | F16 | Q4_0 | Q4_1 | Q5_0 | Q5_1 | Q8_0 |
---|---|---|---|---|---|---|---|
7B | perplexity | 5.9066 | 6.1565 | 6.0912 | 5.9862 | 5.9481 | 5.9070 |
7B | file size | 13.0G | 3.5G | 3.9G | 4.3G | 4.7G | 6.7G |
7B | ms/tok @ 4th | 127 | 55 | 54 | 76 | 83 | 72 |
7B | ms/tok @ 8th | 122 | 43 | 45 | 52 | 56 | 67 |
7B | bits/weight | 16.0 | 4.5 | 5.0 | 5.5 | 6.0 | 8.5 |
13B | perplexity | 5.2543 | 5.3860 | 5.3608 | 5.2856 | 5.2706 | 5.2548 |
13B | file size | 25.0G | 6.8G | 7.6G | 8.3G | 9.1G | 13G |
13B | ms/tok @ 4th | - | 103 | 105 | 148 | 160 | 131 |
13B | ms/tok @ 8th | - | 73 | 82 | 98 | 105 | 128 |
13B | bits/weight | 16.0 | 4.5 | 5.0 | 5.5 | 6.0 | 8.5 |
You can use the perplexity
example to measure perplexity over a given prompt (lower perplexity is better).
For more information, see https://huggingface.co/docs/transformers/perplexity.
The perplexity measurements in table above are done against the wikitext2
test dataset (https://paperswithcode.com/dataset/wikitext-2), with context length of 512.
The time per token is measured on a MacBook M1 Pro 32GB RAM using 4 and 8 threads.
If you want a more ChatGPT-like experience, you can run in interactive mode by passing -i
as a parameter.
In this mode, you can always interrupt generation by pressing Ctrl+C and entering one or more lines of text, which will be converted into tokens and appended to the current context. You can also specify a reverse prompt with the parameter -r "reverse prompt string"
. This will result in user input being prompted whenever the exact tokens of the reverse prompt string are encountered in the generation. A typical use is to use a prompt that makes LLaMa emulate a chat between multiple users, say Alice and Bob, and pass -r "Alice:"
.
Here is an example of a few-shot interaction, invoked with the command
# default arguments using a 7B model
./examples/chat.sh
# advanced chat with a 13B model
./examples/chat-13B.sh
# custom arguments using a 13B model
./main -m ./models/13B/ggml-model-q4_0.bin -n 256 --repeat_penalty 1.0 --color -i -r "User:" -f prompts/chat-with-bob.txt
Note the use of --color
to distinguish between user input and generated text. Other parameters are explained in more detail in the README for the main
example program.
The prompt, user inputs, and model generations can be saved and resumed across calls to ./main
by leveraging --prompt-cache
and --prompt-cache-all
. The ./examples/chat-persistent.sh
script demonstrates this with support for long-running, resumable chat sessions. To use this example, you must provide a file to cache the initial chat prompt and a directory to save the chat session, and may optionally provide the same variables as chat-13B.sh
. The same prompt cache can be reused for new chat sessions. Note that both prompt cache and chat directory are tied to the initial prompt (PROMPT_TEMPLATE
) and the model file.
# Start a new chat
PROMPT_CACHE_FILE=chat.prompt.bin CHAT_SAVE_DIR=./chat/default ./examples/chat-persistent.sh
# Resume that chat
PROMPT_CACHE_FILE=chat.prompt.bin CHAT_SAVE_DIR=./chat/default ./examples/chat-persistent.sh
# Start a different chat with the same prompt/model
PROMPT_CACHE_FILE=chat.prompt.bin CHAT_SAVE_DIR=./chat/another ./examples/chat-persistent.sh
# Different prompt cache for different prompt/model
PROMPT_TEMPLATE=./prompts/chat-with-bob.txt PROMPT_CACHE_FILE=bob.prompt.bin \
CHAT_SAVE_DIR=./chat/bob ./examples/chat-persistent.sh
- First, download the
ggml
Alpaca model into the./models
folder - Run the
main
tool like this:
./examples/alpaca.sh
Sample run:
== Running in interactive mode. ==
- Press Ctrl+C to interject at any time.
- Press Return to return control to LLaMa.
- If you want to submit another line, end your input in '\'.
Below is an instruction that describes a task. Write a response that appropriately completes the request.
> How many letters are there in the English alphabet?
There 26 letters in the English Alphabet
> What is the most common way of transportation in Amsterdam?
The majority (54%) are using public transit. This includes buses, trams and metros with over 100 lines throughout the city which make it very accessible for tourists to navigate around town as well as locals who commute by tram or metro on a daily basis
> List 5 words that start with "ca".
cadaver, cauliflower, cabbage (vegetable), catalpa (tree) and Cailleach.
>
Using GPT4All
- Obtain the
tokenizer.model
file from LLaMA model and put it tomodels
- Obtain the
added_tokens.json
file from Alpaca model and put it tomodels
- Obtain the
gpt4all-lora-quantized.bin
file from GPT4All model and put it tomodels/gpt4all-7B
- It is distributed in the old
ggml
format which is now obsoleted - You have to convert it to the new format using
convert.py
:
python3 convert.py models/gpt4all-7B/gpt4all-lora-quantized.bin
-
You can now use the newly generated
models/gpt4all-7B/ggml-model-q4_0.bin
model in exactly the same way as all other models -
The newer GPT4All-J model is not yet supported!
- Obtain the LLaMA weights
- Obtain the Pygmalion 7B or Metharme 7B XOR encoded weights
- Convert the LLaMA model with the latest HF convert script
- Merge the XOR files with the converted LLaMA weights by running the xor_codec script
- Convert to
ggml
format using theconvert.py
script in this repo:
python3 convert.py pygmalion-7b/ --outtype q4_1
The Pygmalion 7B & Metharme 7B weights are saved in bfloat16 precision. If you wish to convert to
ggml
without quantizating, please specify the--outtype
asf32
instead off16
.
- Under no circumstances should IPFS, magnet links, or any other links to model downloads be shared anywhere in this repository, including in issues, discussions, or pull requests. They will be immediately deleted.
- The LLaMA models are officially distributed by Facebook and will never be provided through this repository.
- Refer to Facebook's LLaMA repository if you need to request access to the model data.
Please verify the sha256 checksums of all downloaded model files to confirm that you have the correct model data files before creating an issue relating to your model files.
- The following python script will verify if you have all possible latest files in your self-installed
./models
subdirectory:
# run the verification script
python3 .\scripts\verify-checksum-models.py
- On linux or macOS it is also possible to run the following commands to verify if you have all possible latest files in your self-installed
./models
subdirectory:- On Linux:
sha256sum --ignore-missing -c SHA256SUMS
- on macOS:
shasum -a 256 --ignore-missing -c SHA256SUMS
- On Linux:
If your issue is with model generation quality, then please at least scan the following links and papers to understand the limitations of LLaMA models. This is especially important when choosing an appropriate model size and appreciating both the significant and subtle differences between LLaMA models and ChatGPT:
- LLaMA:
- GPT-3
- GPT-3.5 / InstructGPT / ChatGPT:
- Download/extract: https://s3.amazonaws.com/research.metamind.io/wikitext/wikitext-2-raw-v1.zip?ref=salesforce-research
- Run
./perplexity -m models/7B/ggml-model-q4_0.bin -f wiki.test.raw
- Output:
perplexity : calculating perplexity over 655 chunks
24.43 seconds per pass - ETA 4.45 hours
[1]4.5970,[2]5.1807,[3]6.0382,...
And after 4.45 hours, you will have the final perplexity.
You can easily run llama.cpp
on Android device with termux.
First, install the essential packages for termux:
pkg install clang wget git cmake
Second, obtain the Android NDK and then build with CMake:
$ mkdir build-android
$ cd build-android
$ export NDK=<your_ndk_directory>
$ cmake -DCMAKE_TOOLCHAIN_FILE=$NDK/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=android-23 -DCMAKE_C_FLAGS=-march=armv8.4a+dotprod ..
$ make
Install termux on your device and run termux-setup-storage
to get access to your SD card.
Finally, copy the llama
binary and the model files to your device storage. Here is a demo of an interactive session running on Pixel 5 phone:
llama-interactive2.mp4
Termux from F-Droid offers an alternative route to execute the project on an Android device. This method empowers you to construct the project right from within the terminal, negating the requirement for a rooted device or SD Card.
Outlined below are the directives for installing the project using OpenBLAS and CLBlast. This combination is specifically designed to deliver peak performance on recent devices that feature a GPU.
If you opt to utilize OpenBLAS, you'll need to install the corresponding package.
apt install libopenblas
Subsequently, if you decide to incorporate CLBlast, you'll first need to install the requisite OpenCL packages:
apt install ocl-icd opencl-headers opencl-clhpp clinfo
In order to compile CLBlast, you'll need to first clone the respective Git repository, which can be found at this URL: https://github.com/CNugteren/CLBlast. Alongside this, clone this repository into your home directory. Once this is done, navigate to the CLBlast folder and execute the commands detailed below:
cmake .
make
cp libclblast.so* $PREFIX/lib
cp ./include/clblast.h ../llama.cpp
Following the previous steps, navigate to the LlamaCpp directory. To compile it with OpenBLAS and CLBlast, execute the command provided below:
cp /data/data/com.termux/files/usr/include/openblas/cblas.h .
cp /data/data/com.termux/files/usr/include/openblas/openblas_config.h .
make LLAMA_CLBLAST=1 //(sometimes you need to run this command twice)
Upon completion of the aforementioned steps, you will have successfully compiled the project. To run it using CLBlast, a slight adjustment is required: a command must be issued to direct the operations towards your device's physical GPU, rather than the virtual one. The necessary command is detailed below:
GGML_OPENCL_PLATFORM=0
GGML_OPENCL_DEVICE=0
export LD_LIBRARY_PATH=/system/vendor/lib64:$LD_LIBRARY_PATH
./main (...)
For easy and swift re-execution, consider documenting this final part in a .sh script file. This will enable you to rerun the process with minimal hassle.
- Docker must be installed and running on your system.
- Create a folder to store big models & intermediate files (ex. /llama/models)
We have two Docker images available for this project:
ghcr.io/ggerganov/llama.cpp:full
: This image includes both the main executable file and the tools to convert LLaMA models into ggml and convert into 4-bit quantization.ghcr.io/ggerganov/llama.cpp:light
: This image only includes the main executable file.
The easiest way to download the models, convert them to ggml and optimize them is with the --all-in-one command which includes the full docker image.
Replace /path/to/models
below with the actual path where you downloaded the models.
docker run -v /path/to/models:/models ghcr.io/ggerganov/llama.cpp:full --all-in-one "/models/" 7B
On completion, you are ready to play!
docker run -v /path/to/models:/models ghcr.io/ggerganov/llama.cpp:full --run -m /models/7B/ggml-model-q4_0.bin -p "Building a website can be done in 10 simple steps:" -n 512
or with a light image:
docker run -v /path/to/models:/models ghcr.io/ggerganov/llama.cpp:light -m /models/7B/ggml-model-q4_0.bin -p "Building a website can be done in 10 simple steps:" -n 512
- Contributors can open PRs
- Collaborators can push to branches in the
llama.cpp
repo and merge PRs into themaster
branch - Collaborators will be invited based on contributions
- Any help with managing issues and PRs is very appreciated!
- Make sure to read this: Inference at the edge
- A bit of backstory for those who are interested: Changelog podcast
- Avoid adding third-party dependencies, extra files, extra headers, etc.
- Always consider cross-compatibility with other operating systems and architectures
- Avoid fancy looking modern STL constructs, use basic
for
loops, avoid templates, keep it simple - There are no strict rules for the code style, but try to follow the patterns in the code (indentation, spaces, etc.). Vertical alignment makes things more readable and easier to batch edit
- Clean-up any trailing whitespaces, use 4 spaces for indentation, brackets on the same line,
void * ptr
,int & a
- See good first issues for tasks suitable for first contributions