mxfp4 full recipe: cp-kv-cache-interleave-size 1 - the DCP sparse indexer (DSA top-k path) only supports interleave 1 on r35 (4 is the Flash dense-MLA rule, not this path)

recipes/glm53-full-mxfp4-4x/recipe.toml

@@ -170,7 +170,12 @@ args = [
     # DCP4 — required to make 512K fit (KV sharded across the 4 TP ranks).
     # Unverified for the full model; first fallback is to drop both lines.
     "--decode-context-parallel-size", "4",
-    "--cp-kv-cache-interleave-size", "4",
+    # interleave MUST be 1 here: the engine (r35) asserts
+    #   DCP sparse indexer currently supports only cp_kv_cache_interleave_size=1
+    # (the DSA top-k sparse-MLA path is not the Flash dense-MLA path where the
+    # x4 interleave / parent-page-stride rule applied; that constraint does not
+    # carry over to this model - learned on the first DCP4 boot, 2026-09-13).
+    "--cp-kv-cache-interleave-size", "1",
     # No --kv-cache-dtype: let the r35 fork pick its native default for
     # GlmMoeDsa attention (the Flash lane's explicit fp8/fp8_ds_mla spellings
     # both failed auto-selection on this build, and those were Flash-MLA