8b194ad12e
### What this PR does / why we need it? - This PR proposes a P2P version of Disaggregated Prefill based on llm_datadist which manages data transfer. - This solution reconstructs previous offline single-node Disaggregated Prefill solution, and supports multi-node and online serveing now. - Currently this solution supports 1P1D situation of Deepseek hybrid parallelism (P: TP+EP, D: DP+EP). Note that xPyD situation is considered in the solution design, and will be supported soon within v1 engine. --------- Signed-off-by: hw_whx <wanghexiang7@huawei.com> Signed-off-by: ganyi <pleaplusone.gy@gmail.com> Co-authored-by: hw_whx <wanghexiang7@huawei.com> Co-authored-by: ganyi <pleaplusone.gy@gmail.com>