# ds4 TP speculative-verify block window over RDMA (tag 0xB5) > Already covered: ds4-tp-big-gate-bulk-exchange-for-prefill-over-r.md (ds4_tp_batch_block_begin drains the decode window, posts layer-0 receives for all rows, crosses a one-byte barrier tagged 0xB5, then runs gates with no handshake). No new claim found. Parent: [Mac local LLMs: Clusters, RDMA, exo and ds4](https://llms-explorer.com/tree/mac-local-llms-clusters-rdma-exo-ds4/) · 1 facets · 1 facts · page: https://llms-explorer.com/tree/ds4-tp-speculative-verify-block-window-over-rdma/ ## Facts - Already covered: ds4-tp-big-gate-bulk-exchange-for-prefill-over-r.md (ds4_tp_batch_block_begin drains the decode window, posts layer-0 receives for all rows, crosses a one-byte barrier tagged 0xB5, then runs gates with no handshake). No new claim found. — source: `asserted`