diff --git a/serverAppConfigs-docs/LLM/dankserver-qwen38-fp8-expert-offload-tuning.md b/serverAppConfigs-docs/LLM/dankserver-qwen38-fp8-expert-offload-tuning.md
index 6e1db27..81f3422 100644
--- a/serverAppConfigs-docs/LLM/dankserver-qwen38-fp8-expert-offload-tuning.md
+++ b/serverAppConfigs-docs/LLM/dankserver-qwen38-fp8-expert-offload-tuning.md
@@ -320,6 +320,60 @@ only available while the container lives).
 Rollback to the 2026-09-29 fp8+MTP4 shape: git tag
 `frank-primary-fp8-mtp-20261001` (env trio + seam re-pinned there).
 
+## Parallelism options on this box (2026-10-01 survey)
+
+Surveyed from the running image's own CLI surface. Verdicts are specific to
+dankserver: 2x R9700 (gfx1201), a ~172.8 GiB expert-offload MoE, and a model
+with only 2 KV heads.
+
+| option | flag | verdict on this box |
+|---|---|---|
+| TP | `--tensor-parallel-size` | **DEPLOYED, =2.** All-reduce dispatch shows `R4D_AR` then `PYNCCL` |
+| DCP | `--decode-context-parallel-size` | **REJECTED at TP=2** — see below |
+| PP | `--pipeline-parallel-size` | supported; untried (stage handoff plus a TP-keyed expert plan) |
+| DP | `--data-parallel-size` (+`-rank`, `-start-rank`) | impossible: every replica holds a full model copy (172.8 GiB vs 31.86 GiB/card) |
+| EP | `--enable-expert-parallel` + `--all2all-backend` (+`--enable-eplb`, `--enable-dbo`, `--enable-elastic-ep`) | supported (`naive`, `allgather_reducescatter`, `deepep_high_throughput`, `deepep_low_latency`, `pplx`, `mori`, `nixl`); would replace the fork's tiered-offload LOCAL gather with a per-layer PCIe all-to-all |
+| multi-node | `--nnodes`, `--node-rank`, `--master-addr/port`, `--distributed-executor-backend` | supported; the actual path to more cards |
+
+### DCP is structurally unavailable here — do not re-test on 2 GPUs
+`--decode-context-parallel-size 2` fails `VllmConfig` validation at boot:
+
+```
+Decode context parallelism for GQA/MQA requires `--tensor-parallel-size` (2) to be
+greater than the model's total number of KV heads (2). Increase
+`--tensor-parallel-size` or set `--decode-context-parallel-size 1`.
+```
+
+DCP shards the KV along the *sequence* dimension after KV heads have been spread
+across the TP ranks, so it requires **TP > num_kv_heads**. This model has 2 KV
+heads (24 Q heads, GQA 12:1), so TP must be >= 4 — four GPUs, not two. Related
+fork facts: DCP *reuses* the TP ranks rather than multiplying them (it is not
+`TP x DCP`), and with PCP enabled the valid DCP sizes are `{1, pcp, tp x pcp}`
+(`vllm/config/parallel.py`). The KV memory a DCP win would have bought is real —
+each rank would hold half the sequence's KV — but it is unreachable without two
+more cards.
+
+### Measuring decode: the harness lives INSIDE the container
+`/home/dank/mtp_measure.py` imports `/bench_iter.py` by absolute path, so it must
+run in the engine's namespace and the files must be copied in first:
+
+```
+podman cp /home/dank/mtp_measure.py frank-primary-qwen:/
+podman cp /home/dank/bench_iter.py  frank-primary-qwen:/
+podman exec frank-primary-qwen python3 /mtp_measure.py
+```
+
+Without the copy the exec dies with `can't open file '/mtp_measure.py': [Errno 2]
+No such file or directory` — measured 2026-10-01, which silently cost a whole
+arm's numbers. A window script must do the copy, not assume the path exists.
+
+### The deployed shape, measured again (2026-10-01 A/B window)
+A clean production-environment boot of the deployed config (4 x 262144 fp8, MNBT
+2048 in that window) reported **`GPU KV cache size: 1,079,582 tokens, Maximum
+concurrency for 262,144 tokens per request: 4.12x`** — the same figures as the
+deployed MNBT-1024 shape, i.e. MNBT does not move the pool, and the capacity is
+reproducible across boots.
+
 ## See Also
 
 - [[dankserver-frontier-moe-feasibility]] — the sibling feasibility page