vllm-project/vllm

[Feature]: Support DCP with FP8 KV Cache

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#32,010 opened on Jan 9, 2026

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 (4 comments) (0 reactions) (0 assignees)Python (16,816 forks)batch import
feature requesthelp wanted

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Description

🚀 The feature, motivation and pitch

DCP is great Fp8 kv cache is great We should support both at the same time:

(EngineCore_DP0 pid=2734260) ERROR 01-08 23:29:29 [core.py:900] RuntimeError: Worker failed with error 'DCP not support fp8 kvcache now.', please check the stack trace above for the root cause

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Contributor guide

Research direction
Investigate how DCP (Distributed Checkpoint) is implemented and how FP8 KV cache is implemented in vllm. Identify the code paths where the error 'DCP not support fp8 kvcache now' is raised and plan the integration of the two features.
Tech stack
python
Domain
backendai
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
PythonvLLM internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40