biondizzle
b4d58df620
Complete KV cache substrate for DSV4 inference: schema.py: Per-layer cache shape derived from LayerSpec. - CSA: 32 entries/block, 32 indexer entries, tail=3 - HCA: 1 entry/block, no indexer, tail=127 - SWA: no classical pool, no tail - BLOCK_SIZE_ORIGINAL_TOKENS=128 (lcm of compression ratios) - compute_block_budget() for allocator sizing allocator.py: Fixed-size block free-list. - GPU stack with pinned host top pointer - acquire/release between graph captures only - OOM raises on exhaustion paged_cache.py: Per-layer classical KV storage. - FP8 (uint8) for non-RoPE dims, BF16 for RoPE dims (paper 2.3.4) - Per-entry inverse scale for FP8 dequant - FP4 indexer keys for CSA layers (NVFP4 scheme) - memory_bytes() tracking state_cache.py: Per-layer SWA window + tail buffer. - Ring buffer with position tracking (swa_head, swa_pos) - CSA: dual streams (ka/za/kb/zb) for overlapping compression - HCA: single stream (ka/za only) - SWA: no tail buffer - reset_slot() for request completion handle.py: LayerCacheHandle — typed per-call view. - write_swa(), read_swa_view(), read_classical_view(), read_indexer_view() - No GPU allocation in acquire() — 0 bytes delta (cudagraph safe) - SWAView/ClassicalView/IndexerView dataclasses for kernel signatures manager.py: KVCacheManager — owns everything. - Per-layer schema, pool, and allocator construction - admit_request()/release_request() lifecycle - allocate_block() for compression flush - acquire() returns LayerCacheHandle (zero-alloc) append_swa.cu: Native kernel for SWA writes. - One block per token, 128 threads per block - Warp-level amax reduction, BF16->FP8 E4M3 quantization - Atomic ring buffer head increment - FP8/BF16 split write + inv_scale + position metadata - FP8 round-trip: <3.6% relative error - RoPE half: exact match (no quantization) All tests pass on B200: - Schema correctness for CSA/HCA/SWA - Allocator acquire/release/OOM - Pool shapes match architecture spec - Manager lifecycle (admit/release/recycle/exhaustion) - Zero-alloc acquire() (cudagraph safe) - append_swa kernel: positions, RoPE exact, FP8 quality, wrap-around, multi-request isolation
2 lines
1 B
Python
2 lines
1 B
Python
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