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.. _auto_awq:
AutoAWQ
==================
.. warning::
Please note that AWQ support in vLLM is under-optimized at the moment. We would recommend using the unquantized version of the model for better
accuracy and higher throughput. Currently, you can use AWQ as a way to reduce memory footprint. As of now, it is more suitable for low latency
inference with small number of concurrent requests. vLLM's AWQ implementation have lower throughput than unquantized version.
To create a new 4-bit quantized model, you can leverage `AutoAWQ <https://github.com/casper-hansen/AutoAWQ>`_.
Quantizing reduces the model's precision from FP16 to INT4 which effectively reduces the file size by ~70%.
The main benefits are lower latency and memory usage.
You can quantize your own models by installing AutoAWQ or picking one of the `400+ models on Huggingface <https://huggingface.co/models?sort=trending&search=awq>`_.
.. code-block:: console
$ pip install autoawq
After installing AutoAWQ, you are ready to quantize a model. Here is an example of how to quantize `mistralai/Mistral-7B-Instruct-v0.2`:
.. code-block:: python
from awq import AutoAWQForCausalLM
from transformers import AutoTokenizer
model_path = 'mistralai/Mistral-7B-Instruct-v0.2'
quant_path = 'mistral-instruct-v0.2-awq'
quant_config = { "zero_point": True, "q_group_size": 128, "w_bit": 4, "version": "GEMM" }
# Load model
model = AutoAWQForCausalLM.from_pretrained(
model_path, **{"low_cpu_mem_usage": True, "use_cache": False}
)
tokenizer = AutoTokenizer.from_pretrained(model_path, trust_remote_code=True)
# Quantize
model.quantize(tokenizer, quant_config=quant_config)
# Save quantized model
model.save_quantized(quant_path)
tokenizer.save_pretrained(quant_path)
print(f'Model is quantized and saved at "{quant_path}"')
To run an AWQ model with vLLM, you can use `TheBloke/Llama-2-7b-Chat-AWQ <https://huggingface.co/TheBloke/Llama-2-7b-Chat-AWQ>`_ with the following command:
.. code-block:: console
$ python examples/llm_engine_example.py --model TheBloke/Llama-2-7b-Chat-AWQ --quantization awq
AWQ models are also supported directly through the LLM entrypoint:
.. code-block:: python
from vllm import LLM, SamplingParams
# Sample prompts.
prompts = [
"Hello, my name is",
"The president of the United States is",
"The capital of France is",
"The future of AI is",
]
# Create a sampling params object.
sampling_params = SamplingParams(temperature=0.8, top_p=0.95)
# Create an LLM.
llm = LLM(model="TheBloke/Llama-2-7b-Chat-AWQ", quantization="AWQ")
# Generate texts from the prompts. The output is a list of RequestOutput objects
# that contain the prompt, generated text, and other information.
outputs = llm.generate(prompts, sampling_params)
# Print the outputs.
for output in outputs:
prompt = output.prompt
generated_text = output.outputs[0].text
print(f"Prompt: {prompt!r}, Generated text: {generated_text!r}")

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.. _bits_and_bytes:
BitsAndBytes
==================
vLLM now supports `BitsAndBytes <https://github.com/TimDettmers/bitsandbytes>`_ for more efficient model inference.
BitsAndBytes quantizes models to reduce memory usage and enhance performance without significantly sacrificing accuracy.
Compared to other quantization methods, BitsAndBytes eliminates the need for calibrating the quantized model with input data.
Below are the steps to utilize BitsAndBytes with vLLM.
.. code-block:: console
$ pip install bitsandbytes>=0.44.0
vLLM reads the model's config file and supports both in-flight quantization and pre-quantized checkpoint.
You can find bitsandbytes quantized models on https://huggingface.co/models?other=bitsandbytes.
And usually, these repositories have a config.json file that includes a quantization_config section.
Read quantized checkpoint.
--------------------------
.. code-block:: python
from vllm import LLM
import torch
# unsloth/tinyllama-bnb-4bit is a pre-quantized checkpoint.
model_id = "unsloth/tinyllama-bnb-4bit"
llm = LLM(model=model_id, dtype=torch.bfloat16, trust_remote_code=True, \
quantization="bitsandbytes", load_format="bitsandbytes")
Inflight quantization: load as 4bit quantization
------------------------------------------------
.. code-block:: python
from vllm import LLM
import torch
model_id = "huggyllama/llama-7b"
llm = LLM(model=model_id, dtype=torch.bfloat16, trust_remote_code=True, \
quantization="bitsandbytes", load_format="bitsandbytes")

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.. _fp8:
FP8 W8A8
==================
vLLM supports FP8 (8-bit floating point) weight and activation quantization using hardware acceleration on GPUs such as Nvidia H100 and AMD MI300x.
Currently, only Hopper and Ada Lovelace GPUs are officially supported for W8A8.
Ampere GPUs are supported for W8A16 (weight-only FP8) utilizing Marlin kernels.
Quantization of models with FP8 allows for a 2x reduction in model memory requirements and up to a 1.6x improvement in throughput with minimal impact on accuracy.
Please visit the HF collection of `quantized FP8 checkpoints of popular LLMs ready to use with vLLM <https://huggingface.co/collections/neuralmagic/fp8-llms-for-vllm-666742ed2b78b7ac8df13127>`_.
The FP8 types typically supported in hardware have two distinct representations, each useful in different scenarios:
- **E4M3**: Consists of 1 sign bit, 4 exponent bits, and 3 bits of mantissa. It can store values up to +/-448 and ``nan``.
- **E5M2**: Consists of 1 sign bit, 5 exponent bits, and 2 bits of mantissa. It can store values up to +/-57344, +/- ``inf``, and ``nan``. The tradeoff for the increased dynamic range is lower precision of the stored values.
.. note::
FP8 computation is supported on NVIDIA GPUs with compute capability > 8.9 (Ada Lovelace, Hopper).
FP8 models will run on compute capability > 8.0 (Ampere) as weight-only W8A16, utilizing FP8 Marlin.
Quick Start with Online Dynamic Quantization
--------------------------------------------
Dynamic quantization of an original precision BF16/FP16 model to FP8 can be achieved with vLLM without any calibration data required. You can enable the feature by specifying ``--quantization="fp8"`` in the command line or setting ``quantization="fp8"`` in the LLM constructor.
In this mode, all Linear modules (except for the final ``lm_head``) have their weights quantized down to FP8_E4M3 precision with a per-tensor scale. Activations have their minimum and maximum values calculated during each forward pass to provide a dynamic per-tensor scale for high accuracy. As a result, latency improvements are limited in this mode.
.. code-block:: python
from vllm import LLM
model = LLM("facebook/opt-125m", quantization="fp8")
# INFO 06-10 17:55:42 model_runner.py:157] Loading model weights took 0.1550 GB
result = model.generate("Hello, my name is")
.. warning::
Currently, we load the model at original precision before quantizing down to 8-bits, so you need enough memory to load the whole model.
Installation
------------
To produce performant FP8 quantized models with vLLM, you'll need to install the `llm-compressor <https://github.com/vllm-project/llm-compressor/>`_ library:
.. code-block:: console
$ pip install llmcompressor==0.1.0
Quantization Process
--------------------
The quantization process involves three main steps:
1. Loading the model
2. Applying quantization
3. Evaluating accuracy in vLLM
1. Loading the Model
^^^^^^^^^^^^^^^^^^^^
Use ``SparseAutoModelForCausalLM``, which wraps ``AutoModelForCausalLM``, for saving and loading quantized models:
.. code-block:: python
from llmcompressor.transformers import SparseAutoModelForCausalLM
from transformers import AutoTokenizer
MODEL_ID = "meta-llama/Meta-Llama-3-8B-Instruct"
model = SparseAutoModelForCausalLM.from_pretrained(
MODEL_ID, device_map="auto", torch_dtype="auto")
tokenizer = AutoTokenizer.from_pretrained(MODEL_ID)
2. Applying Quantization
^^^^^^^^^^^^^^^^^^^^^^^^
For FP8 quantization, we can recover accuracy with simple RTN quantization. We recommend targeting all ``Linear`` layers using the ``FP8_DYNAMIC`` scheme, which uses:
- Static, per-channel quantization on the weights
- Dynamic, per-token quantization on the activations
Since simple RTN does not require data for weight quantization and the activations are quantized dynamically, we do not need any calibration data for this quantization flow.
.. code-block:: python
from llmcompressor.transformers import oneshot
from llmcompressor.modifiers.quantization import QuantizationModifier
# Configure the simple PTQ quantization
recipe = QuantizationModifier(
targets="Linear", scheme="FP8_DYNAMIC", ignore=["lm_head"])
# Apply the quantization algorithm.
oneshot(model=model, recipe=recipe)
# Save the model.
SAVE_DIR = MODEL_ID.split("/")[1] + "-FP8-Dynamic"
model.save_pretrained(SAVE_DIR)
tokenizer.save_pretrained(SAVE_DIR)
3. Evaluating Accuracy
^^^^^^^^^^^^^^^^^^^^^^
Install ``vllm`` and ``lm-evaluation-harness``:
.. code-block:: console
$ pip install vllm lm-eval==0.4.4
Load and run the model in ``vllm``:
.. code-block:: python
from vllm import LLM
model = LLM("./Meta-Llama-3-8B-Instruct-FP8-Dynamic")
model.generate("Hello my name is")
Evaluate accuracy with ``lm_eval`` (for example on 250 samples of ``gsm8k``):
.. note::
Quantized models can be sensitive to the presence of the ``bos`` token. ``lm_eval`` does not add a ``bos`` token by default, so make sure to include the ``add_bos_token=True`` argument when running your evaluations.
.. code-block:: console
$ MODEL=$PWD/Meta-Llama-3-8B-Instruct-FP8-Dynamic
$ lm_eval \
--model vllm \
--model_args pretrained=$MODEL,add_bos_token=True \
--tasks gsm8k --num_fewshot 5 --batch_size auto --limit 250
Here's an example of the resulting scores:
.. code-block:: text
|Tasks|Version| Filter |n-shot| Metric | |Value| |Stderr|
|-----|------:|----------------|-----:|-----------|---|----:|---|-----:|
|gsm8k| 3|flexible-extract| 5|exact_match|↑ |0.768|± |0.0268|
| | |strict-match | 5|exact_match|↑ |0.768|± |0.0268|
Troubleshooting and Support
---------------------------
If you encounter any issues or have feature requests, please open an issue on the ``vllm-project/llm-compressor`` GitHub repository.
Deprecated Flow
------------------
.. note::
The following information is preserved for reference and search purposes.
The quantization method described below is deprecated in favor of the ``llmcompressor`` method described above.
For static per-tensor offline quantization to FP8, please install the `AutoFP8 library <https://github.com/neuralmagic/autofp8>`_.
.. code-block:: bash
git clone https://github.com/neuralmagic/AutoFP8.git
pip install -e AutoFP8
This package introduces the ``AutoFP8ForCausalLM`` and ``BaseQuantizeConfig`` objects for managing how your model will be compressed.
Offline Quantization with Static Activation Scaling Factors
-----------------------------------------------------------
You can use AutoFP8 with calibration data to produce per-tensor static scales for both the weights and activations by enabling the ``activation_scheme="static"`` argument.
.. code-block:: python
from datasets import load_dataset
from transformers import AutoTokenizer
from auto_fp8 import AutoFP8ForCausalLM, BaseQuantizeConfig
pretrained_model_dir = "meta-llama/Meta-Llama-3-8B-Instruct"
quantized_model_dir = "Meta-Llama-3-8B-Instruct-FP8"
tokenizer = AutoTokenizer.from_pretrained(pretrained_model_dir, use_fast=True)
tokenizer.pad_token = tokenizer.eos_token
# Load and tokenize 512 dataset samples for calibration of activation scales
ds = load_dataset("mgoin/ultrachat_2k", split="train_sft").select(range(512))
examples = [tokenizer.apply_chat_template(batch["messages"], tokenize=False) for batch in ds]
examples = tokenizer(examples, padding=True, truncation=True, return_tensors="pt").to("cuda")
# Define quantization config with static activation scales
quantize_config = BaseQuantizeConfig(quant_method="fp8", activation_scheme="static")
# Load the model, quantize, and save checkpoint
model = AutoFP8ForCausalLM.from_pretrained(pretrained_model_dir, quantize_config)
model.quantize(examples)
model.save_quantized(quantized_model_dir)
Your model checkpoint with quantized weights and activations should be available at ``Meta-Llama-3-8B-Instruct-FP8/``.
Finally, you can load the quantized model checkpoint directly in vLLM.
.. code-block:: python
from vllm import LLM
model = LLM(model="Meta-Llama-3-8B-Instruct-FP8/")
# INFO 06-10 21:15:41 model_runner.py:159] Loading model weights took 8.4596 GB
result = model.generate("Hello, my name is")

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.. _fp8_e4m3_kvcache:
FP8 E4M3 KV Cache
==================
Quantizing the KV cache to FP8 reduces its memory footprint. This increases the number of tokens that can be stored in the cache,
improving throughput. OCP (Open Compute Project www.opencompute.org) specifies two common 8-bit floating point data formats: E5M2
(5 exponent bits and 2 mantissa bits) and E4M3FN (4 exponent bits and 3 mantissa bits), often shortened as E4M3. One benefit of
the E4M3 format over E5M2 is that floating point numbers are represented in higher precision. However, the small dynamic range of
FP8 E4M3 (±240.0 can be represented) typically necessitates the use of a higher-precision (typically FP32) scaling factor alongside
each quantized tensor. For now, only per-tensor (scalar) scaling factors are supported. Development is ongoing to support scaling
factors of a finer granularity (e.g. per-channel).
These scaling factors can be specified by passing an optional quantization param JSON to the LLM engine at load time. If
this JSON is not specified, scaling factors default to 1.0. These scaling factors are typically obtained when running an
unquantized model through a quantizer tool (e.g. AMD quantizer or NVIDIA AMMO).
To install AMMO (AlgorithMic Model Optimization):
.. code-block:: console
$ pip install --no-cache-dir --extra-index-url https://pypi.nvidia.com nvidia-ammo
Studies have shown that FP8 E4M3 quantization typically only minimally degrades inference accuracy. The most recent silicon
offerings e.g. AMD MI300, NVIDIA Hopper or later support native hardware conversion to and from fp32, fp16, bf16, etc.
Thus, LLM inference is greatly accelerated with minimal accuracy loss.
Here is an example of how to enable this feature:
.. code-block:: python
# two float8_e4m3fn kv cache scaling factor files are provided under tests/fp8_kv, please refer to
# https://github.com/vllm-project/vllm/blob/main/examples/fp8/README.md to generate kv_cache_scales.json of your own.
from vllm import LLM, SamplingParams
sampling_params = SamplingParams(temperature=1.3, top_p=0.8)
llm = LLM(model="meta-llama/Llama-2-7b-chat-hf",
kv_cache_dtype="fp8",
quantization_param_path="./tests/fp8_kv/llama2-7b-fp8-kv/kv_cache_scales.json")
prompt = "London is the capital of"
out = llm.generate(prompt, sampling_params)[0].outputs[0].text
print(out)
# output w/ scaling factors: England, the United Kingdom, and one of the world's leading financial,
# output w/o scaling factors: England, located in the southeastern part of the country. It is known

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.. _fp8_kv_cache:
FP8 E5M2 KV Cache
==================
The int8/int4 quantization scheme requires additional scale GPU memory storage, which reduces the expected GPU memory benefits.
The FP8 data format retains 2~3 mantissa bits and can convert float/fp16/bflaot16 and fp8 to each other.
Here is an example of how to enable this feature:
.. code-block:: python
from vllm import LLM, SamplingParams
# Sample prompts.
prompts = [
"Hello, my name is",
"The president of the United States is",
"The capital of France is",
"The future of AI is",
]
# Create a sampling params object.
sampling_params = SamplingParams(temperature=0.8, top_p=0.95)
# Create an LLM.
llm = LLM(model="facebook/opt-125m", kv_cache_dtype="fp8")
# Generate texts from the prompts. The output is a list of RequestOutput objects
# that contain the prompt, generated text, and other information.
outputs = llm.generate(prompts, sampling_params)
# Print the outputs.
for output in outputs:
prompt = output.prompt
generated_text = output.outputs[0].text
print(f"Prompt: {prompt!r}, Generated text: {generated_text!r}")

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.. _gguf:
GGUF
==================
.. warning::
Please note that GGUF support in vLLM is highly experimental and under-optimized at the moment, it might be incompatible with other features. Currently, you can use GGUF as a way to reduce memory footprint. If you encounter any issues, please report them to the vLLM team.
.. warning::
Currently, vllm only supports loading single-file GGUF models. If you have a multi-files GGUF model, you can use `gguf-split <https://github.com/ggerganov/llama.cpp/pull/6135>`_ tool to merge them to a single-file model.
To run a GGUF model with vLLM, you can download and use the local GGUF model from `TheBloke/TinyLlama-1.1B-Chat-v1.0-GGUF <https://huggingface.co/TheBloke/TinyLlama-1.1B-Chat-v1.0-GGUF>`_ with the following command:
.. code-block:: console
$ wget https://huggingface.co/TheBloke/TinyLlama-1.1B-Chat-v1.0-GGUF/resolve/main/tinyllama-1.1b-chat-v1.0.Q4_K_M.gguf
$ # We recommend using the tokenizer from base model to avoid long-time and buggy tokenizer conversion.
$ vllm serve ./tinyllama-1.1b-chat-v1.0.Q4_K_M.gguf --tokenizer TinyLlama/TinyLlama-1.1B-Chat-v1.0
You can also add ``--tensor-parallel-size 2`` to enable tensor parallelism inference with 2 GPUs:
.. code-block:: console
$ # We recommend using the tokenizer from base model to avoid long-time and buggy tokenizer conversion.
$ vllm serve ./tinyllama-1.1b-chat-v1.0.Q4_K_M.gguf --tokenizer TinyLlama/TinyLlama-1.1B-Chat-v1.0 --tensor-parallel-size 2
.. warning::
We recommend using the tokenizer from base model instead of GGUF model. Because the tokenizer conversion from GGUF is time-consuming and unstable, especially for some models with large vocab size.
You can also use the GGUF model directly through the LLM entrypoint:
.. code-block:: python
from vllm import LLM, SamplingParams
# In this script, we demonstrate how to pass input to the chat method:
conversation = [
{
"role": "system",
"content": "You are a helpful assistant"
},
{
"role": "user",
"content": "Hello"
},
{
"role": "assistant",
"content": "Hello! How can I assist you today?"
},
{
"role": "user",
"content": "Write an essay about the importance of higher education.",
},
]
# Create a sampling params object.
sampling_params = SamplingParams(temperature=0.8, top_p=0.95)
# Create an LLM.
llm = LLM(model="./tinyllama-1.1b-chat-v1.0.Q4_K_M.gguf",
tokenizer="TinyLlama/TinyLlama-1.1B-Chat-v1.0")
# Generate texts from the prompts. The output is a list of RequestOutput objects
# that contain the prompt, generated text, and other information.
outputs = llm.chat(conversation, sampling_params)
# Print the outputs.
for output in outputs:
prompt = output.prompt
generated_text = output.outputs[0].text
print(f"Prompt: {prompt!r}, Generated text: {generated_text!r}")

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.. _int8:
INT8 W8A8
==================
vLLM supports quantizing weights and activations to INT8 for memory savings and inference acceleration.
This quantization method is particularly useful for reducing model size while maintaining good performance.
Please visit the HF collection of `quantized INT8 checkpoints of popular LLMs ready to use with vLLM <https://huggingface.co/collections/neuralmagic/int8-llms-for-vllm-668ec32c049dca0369816415>`_.
.. note::
INT8 computation is supported on NVIDIA GPUs with compute capability > 7.5 (Turing, Ampere, Ada Lovelace, Hopper).
Prerequisites
-------------
To use INT8 quantization with vLLM, you'll need to install the `llm-compressor <https://github.com/vllm-project/llm-compressor/>`_ library:
.. code-block:: console
$ pip install llmcompressor==0.1.0
Quantization Process
--------------------
The quantization process involves four main steps:
1. Loading the model
2. Preparing calibration data
3. Applying quantization
4. Evaluating accuracy in vLLM
1. Loading the Model
^^^^^^^^^^^^^^^^^^^^
Use ``SparseAutoModelForCausalLM``, which wraps ``AutoModelForCausalLM``, for saving and loading quantized models:
.. code-block:: python
from llmcompressor.transformers import SparseAutoModelForCausalLM
from transformers import AutoTokenizer
MODEL_ID = "meta-llama/Meta-Llama-3-8B-Instruct"
model = SparseAutoModelForCausalLM.from_pretrained(
MODEL_ID, device_map="auto", torch_dtype="auto",
)
tokenizer = AutoTokenizer.from_pretrained(MODEL_ID)
2. Preparing Calibration Data
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
When quantizing activations to INT8, you need sample data to estimate the activation scales.
It's best to use calibration data that closely matches your deployment data.
For a general-purpose instruction-tuned model, you can use a dataset like ``ultrachat``:
.. code-block:: python
from datasets import load_dataset
NUM_CALIBRATION_SAMPLES = 512
MAX_SEQUENCE_LENGTH = 2048
# Load and preprocess the dataset
ds = load_dataset("HuggingFaceH4/ultrachat_200k", split="train_sft")
ds = ds.shuffle(seed=42).select(range(NUM_CALIBRATION_SAMPLES))
def preprocess(example):
return {"text": tokenizer.apply_chat_template(example["messages"], tokenize=False)}
ds = ds.map(preprocess)
def tokenize(sample):
return tokenizer(sample["text"], padding=False, max_length=MAX_SEQUENCE_LENGTH, truncation=True, add_special_tokens=False)
ds = ds.map(tokenize, remove_columns=ds.column_names)
3. Applying Quantization
^^^^^^^^^^^^^^^^^^^^^^^^
Now, apply the quantization algorithms:
.. code-block:: python
from llmcompressor.transformers import oneshot
from llmcompressor.modifiers.quantization import GPTQModifier
from llmcompressor.modifiers.smoothquant import SmoothQuantModifier
# Configure the quantization algorithms
recipe = [
SmoothQuantModifier(smoothing_strength=0.8),
GPTQModifier(targets="Linear", scheme="W8A8", ignore=["lm_head"]),
]
# Apply quantization
oneshot(
model=model,
dataset=ds,
recipe=recipe,
max_seq_length=MAX_SEQUENCE_LENGTH,
num_calibration_samples=NUM_CALIBRATION_SAMPLES,
)
# Save the compressed model
SAVE_DIR = MODEL_ID.split("/")[1] + "-W8A8-Dynamic-Per-Token"
model.save_pretrained(SAVE_DIR, save_compressed=True)
tokenizer.save_pretrained(SAVE_DIR)
This process creates a W8A8 model with weights and activations quantized to 8-bit integers.
4. Evaluating Accuracy
^^^^^^^^^^^^^^^^^^^^^^
After quantization, you can load and run the model in vLLM:
.. code-block:: python
from vllm import LLM
model = LLM("./Meta-Llama-3-8B-Instruct-W8A8-Dynamic-Per-Token")
To evaluate accuracy, you can use ``lm_eval``:
.. code-block:: console
$ lm_eval --model vllm \
--model_args pretrained="./Meta-Llama-3-8B-Instruct-W8A8-Dynamic-Per-Token",add_bos_token=true \
--tasks gsm8k \
--num_fewshot 5 \
--limit 250 \
--batch_size 'auto'
.. note::
Quantized models can be sensitive to the presence of the ``bos`` token. Make sure to include the ``add_bos_token=True`` argument when running evaluations.
Best Practices
--------------
- Start with 512 samples for calibration data (increase if accuracy drops)
- Use a sequence length of 2048 as a starting point
- Employ the chat template or instruction template that the model was trained with
- If you've fine-tuned a model, consider using a sample of your training data for calibration
Troubleshooting and Support
---------------------------
If you encounter any issues or have feature requests, please open an issue on the ``vllm-project/llm-compressor`` GitHub repository.

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.. _supported_hardware_for_quantization:
Supported Hardware for Quantization Kernels
===========================================
The table below shows the compatibility of various quantization implementations with different hardware platforms in vLLM:
.. list-table::
:header-rows: 1
:widths: 20 8 8 8 8 8 8 8 8 8 8
* - Implementation
- Volta
- Turing
- Ampere
- Ada
- Hopper
- AMD GPU
- Intel GPU
- x86 CPU
- AWS Inferentia
- Google TPU
* - AWQ
- ✗
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✅︎
- ✗
- ✗
* - GPTQ
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✗
- ✗
- ✗
* - Marlin (GPTQ/AWQ/FP8)
- ✗
- ✗
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✗
- ✗
- ✗
* - INT8 (W8A8)
- ✗
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✅︎
- ✗
- ✗
* - FP8 (W8A8)
- ✗
- ✗
- ✗
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✗
- ✗
* - AQLM
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✗
- ✗
- ✗
* - bitsandbytes
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✗
- ✗
- ✗
* - DeepSpeedFP
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✗
- ✗
- ✗
* - GGUF
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✅︎
- ✗
- ✗
- ✗
- ✗
- ✗
Notes:
^^^^^^
- Volta refers to SM 7.0, Turing to SM 7.5, Ampere to SM 8.0/8.6, Ada to SM 8.9, and Hopper to SM 9.0.
- "✅︎" indicates that the quantization method is supported on the specified hardware.
- "✗" indicates that the quantization method is not supported on the specified hardware.
Please note that this compatibility chart may be subject to change as vLLM continues to evolve and expand its support for different hardware platforms and quantization methods.
For the most up-to-date information on hardware support and quantization methods, please check the `quantization directory <https://github.com/vllm-project/vllm/tree/main/vllm/model_executor/layers/quantization>`_ or consult with the vLLM development team.