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[Feature][Frontend]: Continued stream_options implementation also in CompletionRequest #5319

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Etelis
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@Etelis Etelis commented Jun 6, 2024

This PR introduces support for the stream_option parameter in the CompletionRequest class.
Continuing the previous PR: #5135

FIX #4967(link existing issues this PR will resolve)

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Etelis added 4 commits June 6, 2024 19:24
Add stream_options validation in CompletionRequest
…usage` field based on `stream_options.include_usage`.

- Enhanced the token-by-token and finish responses to conditionally include `usage` field if `stream_options.include_usage` is set.
- Added a final usage statistics message if `stream_options.include_usage` is set, including prompt tokens and completion tokens.
- stream=True, stream_options=None

- stream=True, stream_options={"include_usage": True}

- stream=True, stream_options={"include_usage": False}

- stream=False, stream_options={"include_usage": None}

- stream=False, stream_options={"include_usage": False}

- stream=False, stream_options={"include_usage": True}
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Unlike Chat Completions API, Completions API doesn't have a response format specific to streaming. Based on the documentation, it seems that usage should be returned for each chunk. Can you check whether the real OpenAI API acts in this way?

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Etelis commented Jun 7, 2024

Will make the needed adjustments later today!
Thank you!

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Etelis commented Jun 7, 2024

Unlike Chat Completions API, Completions API doesn't have a response format specific to streaming. Based on the documentation, it seems that usage should be returned for each chunk. Can you check whether the real OpenAI API acts in this way?

Actually it seems completions works just the same regarding this:
https://platform.openai.com/docs/api-reference/completions/create

`include_usage

boolean
Optional

If set, an additional chunk will be streamed before the data: [DONE] message. The usage field on this chunk shows the token usage statistics for the entire request, and the choices field will always be an empty array. All other chunks will also include a usage field, but with a null value.`

@DarkLight1337
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Unlike Chat Completions API, Completions API doesn't have a response format specific to streaming. Based on the documentation, it seems that usage should be returned for each chunk. Can you check whether the real OpenAI API acts in this way?

Actually it seems completions works just the same regarding this: https://platform.openai.com/docs/api-reference/completions/create

`include_usage

boolean Optional

If set, an additional chunk will be streamed before the data: [DONE] message. The usage field on this chunk shows the token usage statistics for the entire request, and the choices field will always be an empty array. All other chunks will also include a usage field, but with a null value.`

Looks like you're right. I focused too much on the return value. In that case, I'll approve the PR once you have fixed the test cases and resolved the merge conflict.

Etelis added 4 commits June 7, 2024 16:07
Noted by DrakLIght there was two issues:
1. Notation of `@pytest.mark.asyncio` on the test function.
2. Checking on chunk usage on a non exisiting variable.
Should have done that on prev commit TBH
-- Removed redundent StreamOptions.
-- Formater.sh
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I've changed my mind regarding test_chat_stream_options - can you fix it in this PR as well?

Etelis added 2 commits June 8, 2024 15:51
-- Added parametrize in completion stream options.

-- Revised streaming tests as the usage is no longer needed to be asserted.
-- single_usage is no longer needed inside test completion streaming.
Etelis added 4 commits June 9, 2024 09:38
-- Resolved concerns raised by DarkLight (Mistake related to client.chat.completions.creat)

-- Resolved issue related to MODEL_NAME,
-- Redundent test removed (stream=True, stream_options=None)
-- Not found.
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Try placing the stream options tests before the embeddings tests. There might be conflicts between the pytest fixtures.

Etelis added 2 commits June 9, 2024 17:26
- Moved stream options tests before embeddings tests to address conflicts between pytest fixtures.
- This change is in response to a suggestion from DarkLight1337.
- Adjustments made to ensure test suite runs without errors.
- Moved stream options tests before embeddings tests to address conflicts between pytest fixtures.
- This change is in response to a suggestion from DarkLight1337.
- Adjustments made to ensure test suite runs without errors.
-- Formated code
Etelis and others added 4 commits June 9, 2024 19:33
- **Stream with `include_usage: False`**:
  - Added assertions to ensure no chunk contains the `usage` key.
- **Stream with `include_usage: True`**:
  - Modified test logic to verify that every chunk has `usage` as `None` except for the last chunk, which should have `usage` populated.
- **Stream=False configurations**:
  - Added tests to verify that using `stream_options: {"include_usage": None}`, `{"include_usage": False}`, and `{"include_usage": True}` raises a `BadRequestError`.
- Removed redundant test for `stream=False` with `stream_options: {"include_usage": False}` as it overlaps with the error condition checks.
…tribute

- **Stream with `include_usage: False`**:
  - Updated tests to assert that the `usage` attribute is `None` instead of checking its absence in the chunk dictionary. This aligns with the observed behavior where `usage` is present but set to `None`.
- Incorrect indent caused an empty `choices` list after each generated `choices`.
- Moved the final `usage` creation step back one indent level to fix this.
Etelis added 2 commits June 10, 2024 13:20
- Incorrect indent caused double sending of a chuck resulting in a server crush.

- Moved the final `usage` creation step back twp indent levels to fix this.
@DarkLight1337 DarkLight1337 enabled auto-merge (squash) June 10, 2024 12:09
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The entrypoints tests are finally passing. Thanks again for your efforts!

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Etelis commented Jun 10, 2024

The entrypoints tests are finally passing. Thanks again for your efforts!

Yeah, had some minor issues there.
But it seems to be fixed now :)

Thank you for the help!!

@DarkLight1337 DarkLight1337 merged commit 774d103 into vllm-project:main Jun 10, 2024
101 of 103 checks passed
robertgshaw2-neuralmagic pushed a commit to neuralmagic/nm-vllm that referenced this pull request Jun 11, 2024
tjohnson31415 added a commit to tjohnson31415/vllm that referenced this pull request Jun 11, 2024
* upstream/main: (126 commits)
  [Bugfix][Frontend] Cleanup "fix chat logprobs" (vllm-project#5026)
  [Bugfix] OpenAI entrypoint limits logprobs while ignoring server defined --max-logprobs (vllm-project#5312)
  [Misc] Various simplifications and typing fixes (vllm-project#5368)
  [ci] Fix Buildkite agent path (vllm-project#5392)
  [Doc] Add documentation for FP8 W8A8 (vllm-project#5388)
  Bump version to v0.5.0 (vllm-project#5384)
  [Docs] Alphabetically sort sponsors (vllm-project#5386)
  [Docs] Add Docs on Limitations of VLM Support (vllm-project#5383)
  [ci] Mount buildkite agent on Docker container to upload benchmark results (vllm-project#5330)
  [ci] Use small_cpu_queue for doc build (vllm-project#5331)
  [Bugfix] Fix LLaVA-NeXT (vllm-project#5380)
  [Feature][Frontend]:  Continued `stream_options` implementation also in CompletionRequest (vllm-project#5319)
  [Model] Initial support for LLaVA-NeXT (vllm-project#4199)
  [Misc] Improve error message when LoRA parsing fails (vllm-project#5194)
  [misc][typo] fix typo (vllm-project#5372)
  [Frontend][Misc] Enforce Pixel Values as Input Type for VLMs in API Server (vllm-project#5374)
  [Misc] Update to comply with the new `compressed-tensors` config (vllm-project#5350)
  [Bugfix] Fix KeyError: 1 When Using LoRA adapters (vllm-project#5164)
  [Kernel][Misc] Use TORCH_LIBRARY instead of PYBIND11_MODULE for custom ops (vllm-project#5047)
  [mis][ci/test] fix flaky test in test_sharded_state_loader.py (vllm-project#5361)
  ...
joerunde pushed a commit to joerunde/vllm that referenced this pull request Jun 17, 2024
xjpang pushed a commit to xjpang/vllm that referenced this pull request Jun 27, 2024
xjpang pushed a commit to xjpang/vllm that referenced this pull request Jul 8, 2024
xjpang pushed a commit to xjpang/vllm that referenced this pull request Jul 24, 2024
Temirulan pushed a commit to Temirulan/vllm-whisper that referenced this pull request Sep 6, 2024
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[Feature]: support stream_options option
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