GLM-5.3-Flash KDA CPU reference (Slice 2 design artifact – not a production forward path).
GLM-5.3-Flash KDA (Kimi Delta Attention) CPU reference — Slice 2B.
Resolve the k64 deep-K tile GEMM, preferring the 3-deep weight-pipeline
variant. ON by default; ATLAS_NO_K64_PIPELINE3 (presence — =0 is NOT
“off”) falls back to the 2-stage parent.
Resolve the NARROW-N (N_TILE=64) deep-K twin. KernelHandle(0) when the
kernel is absent or the presence kill switch ATLAS_NO_K64_N64 is set
(=0 is NOT “off”). Callers must store the handle — kernel() is an
init-time lookup, not a per-launch one.
Whether the grouped-GEMM MoE decode arm should run for n rows —
PURE, so both polarities are testable without touching process env or the
OnceLocks below (which latch, and would make the tests order-dependent).
Kill switch for the grouped-GEMM MoE decode arm. PRESENCE check per the
house convention (ATLAS_NO_MOE_GROUPED_DECODE=0 is NOT off), read once
per process — this predicate sits in the decode path, and the env::var
it replaces ran on every dispatch for MoE models.
Force the grouped arm BELOW moe_grouped_decode_min_rows(). Diagnostic
only — it exists so the n=5..15 gap can be measured without a rebuild, and
it is the same var #415’s measurements used, kept working on purpose.
Never a production setting: if forcing wins at a width, move the THRESHOLD.
Resolve the N128/M64 tile GEMM, preferring the 3-deep weight-pipeline variant.
ON by default; ATLAS_NO_TGEMM_PIPELINE3 (presence — =0 is NOT “off”)
falls back to the 2-stage parent. Falls back automatically on any target that
does not ship _p3.
Probe a kernel that only SOME targets compile — a Hopper-owned twin, a
tensor-core tier the gb10 tree does not carry — without issuing a lookup
on a target that never built the module. The boot audit records every
failed lookup as a dispatch site on a silent fallback path and refuses to
serve; a target that does not carry the source has no fallback to be
silent about, it has its only path. Stack 1089308’s first campaign found
17 such lookups on GB10 and could not boot. On a target that DOES carry
the module this is exactly try_kernel, audit included.
Resolve the W4A16 m128 v3 GEMM. Opt-in ONLY, same contract as
w4a16_v2_kernel: ATLAS_W4A16_VARIANT=v3 selects it, anything else
resolves to a ZERO handle WITHOUT issuing a lookup.