Add AWQ quantization inference support (#1019) (#1054)

# Add AWQ quantization inference support

Fixes
huggingface/text-generation-inference#781

This PR (partially) adds support for AWQ quantization for inference.
More information on AWQ [here](https://arxiv.org/abs/2306.00978). In
general, AWQ is faster and more accurate than GPTQ, which is currently
supported by TGI.

This PR installs 4-bit GEMM custom CUDA kernels released by AWQ authors
(in `requirements.txt`, just one line change).

Quick way to test this PR would be bring up TGI as follows:

```
text-generation-server download-weights abhinavkulkarni/codellama-CodeLlama-7b-Python-hf-w4-g128-awq

text-generation-launcher \
--huggingface-hub-cache ~/.cache/huggingface/hub/ \
--model-id abhinavkulkarni/codellama-CodeLlama-7b-Python-hf-w4-g128-awq \
--trust-remote-code --port 8080 \
--max-input-length 2048 --max-total-tokens 4096 --max-batch-prefill-tokens 4096 \
--quantize awq
```

Please note:
* This PR was tested with FlashAttention v2 and vLLM.
* This PR adds support for AWQ inference, not quantizing the models.
That needs to be done outside of TGI, instructions

[here](https://github.com/mit-han-lab/llm-awq/tree/f084f40bd996f3cf3a0633c1ad7d9d476c318aaa).
* This PR only adds support for `FlashLlama` models for now.
* Multi-GPU setup has not been tested. 
* No integration tests have been added so far, will add later if
maintainers are interested in this change.
* This PR can be tested on any of the models released

[here](https://huggingface.co/abhinavkulkarni?sort_models=downloads#models).

Please refer to the linked issue for benchmarks for

[abhinavkulkarni/meta-llama-Llama-2-7b-chat-hf-w4-g128-awq](https://huggingface.co/abhinavkulkarni/meta-llama-Llama-2-7b-chat-hf-w4-g128-awq)
vs

[TheBloke/Llama-2-7b-Chat-GPTQ](https://huggingface.co/TheBloke/Llama-2-7b-Chat-GPTQ).

Please note, AWQ has released faster (and in case of Llama, fused)
kernels for 4-bit GEMM, currently at the top of the `main` branch at
https://github.com/mit-han-lab/llm-awq, but this PR uses an older commit
that has been tested to work. We can switch to latest commit later on.

## Who can review?

@OlivierDehaene OR @Narsil

---------



# What does this PR do?

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Fixes # (issue)


## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the
other checks if that's the case).
- [ ] Did you read the [contributor
guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
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      to it if that's the case.
- [ ] Did you make sure to update the documentation with your changes?
Here are the
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guidelines](https://github.com/huggingface/transformers/tree/main/docs),
and
[here are tips on formatting
docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?


## Who can review?

Anyone in the community is free to review the PR once the tests have
passed. Feel free to tag
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---------

Co-authored-by: Abhinav M Kulkarni <abhinavkulkarni@gmail.com>
Co-authored-by: Abhinav Kulkarni <abhinav@concentric.ai>

Dockerfile

@@ -111,22 +111,22 @@ RUN make build-flash-attention-v2
 
 # Build Transformers exllama kernels
 FROM kernel-builder as exllama-kernels-builder
-
 WORKDIR /usr/src
-
 COPY server/exllama_kernels/ .
-
-
 # Build specific version of transformers
 RUN TORCH_CUDA_ARCH_LIST="8.0;8.6+PTX" python setup.py build
 
+# Build Transformers awq kernels
+FROM kernel-builder as awq-kernels-builder
+WORKDIR /usr/src
+COPY server/Makefile-awq Makefile
+# Build specific version of transformers
+RUN TORCH_CUDA_ARCH_LIST="8.0;8.6+PTX" make build-awq
+
 # Build Transformers CUDA kernels
 FROM kernel-builder as custom-kernels-builder
-
 WORKDIR /usr/src
-
 COPY server/custom_kernels/ .
-
 # Build specific version of transformers
 RUN python setup.py build
 
@@ -175,6 +175,8 @@ COPY --from=flash-att-v2-builder /usr/src/flash-attention-v2/build/lib.linux-x86
 COPY --from=custom-kernels-builder /usr/src/build/lib.linux-x86_64-cpython-39 /opt/conda/lib/python3.9/site-packages
 # Copy build artifacts from exllama kernels builder
 COPY --from=exllama-kernels-builder /usr/src/build/lib.linux-x86_64-cpython-39 /opt/conda/lib/python3.9/site-packages
+# Copy build artifacts from awq kernels builder
+COPY --from=awq-kernels-builder /usr/src/llm-awq/awq/kernels/build/lib.linux-x86_64-cpython-39 /opt/conda/lib/python3.9/site-packages
 
 # Copy builds artifacts from vllm builder
 COPY --from=vllm-builder /usr/src/vllm/build/lib.linux-x86_64-cpython-39 /opt/conda/lib/python3.9/site-packages

docs/source/basic_tutorials/preparing_model.md

@@ -4,7 +4,7 @@ Text Generation Inference improves the model in several aspects.
 
 ## Quantization
 
-TGI supports [bits-and-bytes](https://github.com/TimDettmers/bitsandbytes#bitsandbytes) and [GPT-Q](https://arxiv.org/abs/2210.17323) quantization. To speed up inference with quantization, simply set `quantize` flag to `bitsandbytes` or `gptq` depending on the quantization technique you wish to use. When using GPT-Q quantization, you need to point to one of the models [here](https://huggingface.co/models?search=gptq). To get more information about quantization, please refer to (./conceptual/quantization.md)
+TGI supports [bits-and-bytes](https://github.com/TimDettmers/bitsandbytes#bitsandbytes), [GPT-Q](https://arxiv.org/abs/2210.17323) and [AWQ](https://arxiv.org/abs/2306.00978) quantization. To speed up inference with quantization, simply set `quantize` flag to `bitsandbytes`, `gptq` or `awq` depending on the quantization technique you wish to use. When using GPT-Q quantization, you need to point to one of the models [here](https://huggingface.co/models?search=gptq) when using AWQ quantization, you need to point to one of the models [here](https://huggingface.co/models?search=awq). To get more information about quantization, please refer to (./conceptual/quantization.md)
 
 
 ## RoPE Scaling

integration-tests/models/__snapshots__/test_flash_awq/test_flash_llama_awq.json

@@ -0,0 +1,104 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "length",
+    "generated_tokens": 10,
+    "prefill": [
+      {
+        "id": 1,
+        "logprob": null,
+        "text": "<s>"
+      },
+      {
+        "id": 1724,
+        "logprob": -7.703125,
+        "text": "What"
+      },
+      {
+        "id": 338,
+        "logprob": -1.4765625,
+        "text": "is"
+      },
+      {
+        "id": 21784,
+        "logprob": -9.390625,
+        "text": "Deep"
+      },
+      {
+        "id": 29257,
+        "logprob": -1.8583984,
+        "text": "Learning"
+      },
+      {
+        "id": 29973,
+        "logprob": -0.7548828,
+        "text": "?"
+      }
+    ],
+    "seed": null,
+    "tokens": [
+      {
+        "id": 13,
+        "logprob": -1.9306641,
+        "special": false,
+        "text": "\n"
+      },
+      {
+        "id": 5618,
+        "logprob": -2.4550781,
+        "special": false,
+        "text": "What"
+      },
+      {
+        "id": 338,
+        "logprob": -0.5732422,
+        "special": false,
+        "text": " is"
+      },
+      {
+        "id": 278,
+        "logprob": -1.5761719,
+        "special": false,
+        "text": " the"
+      },
+      {
+        "id": 4328,
+        "logprob": -1.5888672,
+        "special": false,
+        "text": " difference"
+      },
+      {
+        "id": 1546,
+        "logprob": -0.026504517,
+        "special": false,
+        "text": " between"
+      },
+      {
+        "id": 21784,
+        "logprob": -1.4287109,
+        "special": false,
+        "text": " Deep"
+      },
+      {
+        "id": 29257,
+        "logprob": -0.15856934,
+        "special": false,
+        "text": " Learning"
+      },
+      {
+        "id": 322,
+        "logprob": -0.17456055,
+        "special": false,
+        "text": " and"
+      },
+      {
+        "id": 6189,
+        "logprob": -0.62646484,
+        "special": false,
+        "text": " Machine"
+      }
+    ],
+    "top_tokens": null
+  },
+  "generated_text": "\nWhat is the difference between Deep Learning and Machine"
+}

integration-tests/models/__snapshots__/test_flash_awq/test_flash_llama_awq_all_params.json

@@ -0,0 +1,99 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "length",
+    "generated_tokens": 10,
+    "prefill": [
+      {
+        "id": 1,
+        "logprob": null,
+        "text": "<s>"
+      },
+      {
+        "id": 338,
+        "logprob": -9.0859375,
+        "text": "is"
+      },
+      {
+        "id": 21784,
+        "logprob": -10.90625,
+        "text": "Deep"
+      },
+      {
+        "id": 29257,
+        "logprob": -2.65625,
+        "text": "Learning"
+      },
+      {
+        "id": 29973,
+        "logprob": -4.8085938,
+        "text": "?"
+      }
+    ],
+    "seed": 0,
+    "tokens": [
+      {
+        "id": 13,
+        "logprob": -0.19958496,
+        "special": false,
+        "text": "\n"
+      },
+      {
+        "id": 4013,
+        "logprob": -2.203125,
+        "special": false,
+        "text": "This"
+      },
+      {
+        "id": 1139,
+        "logprob": -0.23693848,
+        "special": false,
+        "text": " question"
+      },
+      {
+        "id": 756,
+        "logprob": 0.0,
+        "special": false,
+        "text": " has"
+      },
+      {
+        "id": 1063,
+        "logprob": -0.076538086,
+        "special": false,
+        "text": " been"
+      },
+      {
+        "id": 4433,
+        "logprob": 0.0,
+        "special": false,
+        "text": " asked"
+      },
+      {
+        "id": 1784,
+        "logprob": -1.1367188,
+        "special": false,
+        "text": " many"
+      },
+      {
+        "id": 3064,
+        "logprob": 0.0,
+        "special": false,
+        "text": " times"
+      },
+      {
+        "id": 322,
+        "logprob": -1.7460938,
+        "special": false,
+        "text": " and"
+      },
+      {
+        "id": 306,
+        "logprob": 0.0,
+        "special": false,
+        "text": " I"
+      }
+    ],
+    "top_tokens": null
+  },
+  "generated_text": "What is Deep Learning?\nThis question has been asked many times and I"
+}