feature: pd disagregation docker#510
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wire vLLM KV transfer to a RBLN-specific NIXL connector and host-side
buffers so prefill/decode can run on separate engines with H2H transfer.
KV connector / registration
- add RblnNixlConnector (scheduler/worker) extending upstream NixlConnector:
- register connector name "RblnNixlConnector" in kv_connector factory.
Platform
- expose NIXL hints: get_nixl_supported_devices (rbln -> cpu) and
get_nixl_memory_type ("DRAM").
Scheduler (rbln_scheduler.py)
- handle kv_consumer request to be scheduled with other requests in decode
stage
Model runner (rbln_model_runner.py)
- override maybe_get_kv_connector_output(..., wait_for_save)
using last prefill chunk.
- replace generic copy_kv_blocks with rbln_copy_kv_blocks using runtime
_update_kv_cache / _fetch_kv_cache
- bind_kv_cache_name + per-layer names for mark_static_address when compiling.
Attention backend (flash_attention.py)
- Report backend name as FLASH_ATTN for upstream compatibility.
Examples
- add experimental examples/experimental/pd_disaggregation/toy_proxy_server.py
(FastAPI proxy routing chat completions to prefill vs decode HTTP backends).
Signed-off-by: Jinseok Lee <jindol21@rebellions.ai>
rebel-jindol21
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release)feature)model)core)fix)perf)refactor)docs)other): please describe🧪 How to Test
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