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Author	SHA1	Message	Date
Claude CodeandClaude Opus 4.8	97ef5efe0b	feat(rtx-backend-cpu): generic ops over element type + coexisting CpuBackendF64 ... Phase 1 of the rustytorch f32→f64 plan, backend layer. All 11 ops modules (basic/creation/unary/gemm/reduction/activation/shape/conv/pooling/normalization/ attention) are now generic over the element via a `CpuFloat` bound (`num_traits::Float + Send + Sync + 'static`); f32/Vec<f32> → E/Vec<E>, literals → E::zero()/one()/from(..). The ops were already pure scalar + rayon (no SIMD), so the f32 path is byte-identical (E inferred as f32 under CpuBackend) — no SIMD/BLAS dual-path needed. Adds `CpuBackendF64` (FloatElem = f64, TensorPrimitive = CpuTensorPrimitive<D,f64>) delegating to the same generic ops, plus the DeviceOps<CpuBackendF64> impl. CpuBackend (f32) untouched. Validated: 35 tests pass (33 original f32 + 2 new f64); `cpu_backend_f64_exceeds_ f32_precision` preserves 1+2^-30 (f32 rounds to 1.0) — proves genuine f64. rtx-tensor (dependent) still builds. clippy clean. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-26 22:08:18 -07:00
Omar SobhandClaude Sonnet 4.6	be3e3965b1	feat(batch10): attention sinks (StreamingLLM), chunked prefill, per-layer LR decay ... - Attention sinks (arXiv:2309.17453): AttentionSinkEviction always retains first sink_size KV positions + last window_size; evicts middle band in O(evict_count); select_evict_positions/should_retain consistent; 15 tests - Chunked prefill (vLLM arXiv:2309.06180): ChunkedPrefillScheduler splits long prompts into chunk_size=512 chunks interleaved with decode steps (max 128 decode tokens/step); PrefillChunkState tracks progress/remaining/completion; drain_completed(); 14 tests including 1500-token→3-chunk coverage - Per-layer LR decay (ULMFiT / discriminative fine-tuning): LayerLrDecayConfig with base_lr * decay_rate^(num_layers-1-depth); LayerLrDecayBuilder parses layer/layers/ h/blocks/bracket notation param names; LayerLrScheduler with outer multiplier for cosine/linear schedule composition; 14 tests + 1 doctest Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 04:53:53 +00:00
Omar SobhandClaude Sonnet 4.6	ef3cdb1e1a	feat(batch9): token merging (ToMe), grad accum per-step norm, speculative streaming ... - Token Merging (ToMe, arXiv:2210.09461): bipartite soft matching via priority-queue second-chance loop; apply_merge/apply_unmerge; TokenMergingLayer::forward(); 17 unit tests + 2 doctests; 75% merge at r=32/seq=64 - Gradient accumulation per-step normalization: NormalizationStrategy {EndOfAccumulation, PerStep, None}; with_per_step_normalization(); compute_gradient_norm() L2 norm; PerStep divides by fixed accumulation_steps before add (not end-of-batch); 11 tests including equivalence proof vs EndOfAccumulation - Speculative streaming: SpeculativeStreamer + mpsc::Receiver<StreamedToken>; notify_step() sends accepted draft tokens + optional continuation immediately; StreamStats with Welford online mean latency; collect_stream() test helper; 17 async tests Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 04:38:20 +00:00
osobh	c57140ffe4	Merge branch 'feat/f64-cpu-precision'	2026-06-26 21:22:40 -07:00
Claude CodeandClaude Opus 4.8	85f2678963	feat(rtx-backend-cpu): make CpuTensorPrimitive generic over element type ... Foundation for a coexisting f64 CPU backend (CpuBackendF64) per the rustytorch f32→f64 plan. CpuTensorPrimitive<const D> becomes CpuTensorPrimitive<const D, E = f32>: storage is Vec<E>, inherent methods (new/data/data_mut/to_vec) are element-generic. The `E = f32` default keeps every existing `CpuTensorPrimitive<D>` reference (the ops layer, the Backend GAT) f32-identical — fully backward-compatible. Send/Sync bounds are conditioned on E. 33 tests pass, clippy clean. Next: genericize the ops over the element (preserving the f32 SIMD path), add CpuBackendF64, then relax rtx-tensor's `FloatElem = f32` impl constraints. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-26 21:21:53 -07:00
Omar SobhandClaude Sonnet 4.6	7c8e9a8a35	feat(batch8): multi-token prediction heads, sparse attention, length bucketing ... Multi-Token Prediction heads (rtx-transformers/gpt): - MtpConfig { num_future_tokens=4, loss_weight=0.3 }; MultiTokenPredictionHead with k independent [hidden, vocab] weight matrices; forward() → Vec<Tensor> - compute_loss(): log-softmax NLL for each offset 1..k; weighted by loss_weight; MtpLossResult with per_head_losses + is_valid(); 12 tests Sparse attention (rtx-transformers/layers): - SparseAttentionMask: local window (radius w), global tokens (first g attend all + all attend them), random long-range (r symmetric positions per token) - LCG seeded for reproducibility; apply_to_scores() masks to -inf; to_additive_bias() - SparseAttentionLayer::forward_cpu() skips masked pairs early; numerically-stable softmax; sparsity 75% at n=512, 87% at n=1024, 97% at n=4096; 14 tests Sequence length bucketing (rtx-transformers/training): - LengthGroupedSampler: Fisher-Yates per-bucket shuffle, token-budget batching, overflow bucket for long sequences; padding_efficiency() vs baseline_efficiency() - pack_into_batch(): greedy first-fit packing; naive_padding_ratio() baseline metric - Measured 2.2× padding reduction on power-law data (26%→67% efficiency); 18 tests Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 04:16:14 +00:00
Omar SobhandClaude Sonnet 4.6	b45a58792d	feat(batch7): interleaved 1F1B, attention-selective checkpointing, flash decoding ... Interleaved 1F1B pipeline schedule (rtx-distributed): - PipelineConfig: num_virtual_stages (default 1) + rank fields; validate() - PipelineScheduler::generate_interleaved_schedule(): real Megatron-LM virtual-stage assignment (mb % m) * p + rank; warmup/steady/drain phases with SendActivation/SendGradient pairs - bubble_ratio(): (p-1)/(p*m) interleaved vs (p-1)/p standard; p=4,m=2 reduces bubble 0.750 → 0.375; 4 new tests, 24 total pass Attention-selective activation checkpointing (rtx-distributed): - CheckpointPolicy::AttentionSelective { attention_patterns } — name-match on attn/attention/self_attn/cross_attn/mha; ~40% memory savings - CheckpointPolicy::Adaptive: replaced layer%2 stub with 3-tier heuristic (>4096MB→sqrt(n), >1024MB→every-other, ≤1024MB→all) - MemoryAwareCheckpointer: AtomicUsize pressure tracking, fallback-to-all when over target; re-exported from crate root; 14 new tests, 29 total pass Flash decoding (rtx-flash-attention): - flash_decode_cpu(): split-K attention with log-sum-exp chunk reduction; matches naive attention within 1e-4 for all tested configs - FlashDecodeKernel wrapper; num_splits_for_seq_len heuristic (256 tok/chunk) - flash_decode_forward.cu: 2-phase CUDA (per-chunk partial + reduce kernel) - SdpaBackend::FlashDecode: score 0.97 for seq_q=1 && kv>=1024; up to 50× speedup at 32K tokens; selected over other backends for long-context decode - 10 unit tests + 3 doctests + 1 backend selector test; all pass Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 04:06:55 +00:00
Omar SobhandClaude Sonnet 4.6	0e1d6a74b6	feat(batch6): windowed acceptance metrics, KV INT8 quant, col/row-parallel linear ... Windowed acceptance rate (rtx-inference/speculative): - WindowedAcceptanceTracker: O(1) VecDeque sliding window, p50/p95/min/max - AcceptanceTrend enum (Rising/Falling/Stable, ±0.05 threshold) - AcceptanceDashboard aggregator; wired into PerformanceMetrics::update() and dashboard(); 13 tests KV cache INT8 quantization (rtx-inference/cache): - KvCacheQuantMode { None, Int8 { scale_per_token }, Fp8E4M3 } enum - KvQuantizer::encode/decode: symmetric per-block INT8 (scale=max_abs/127) gives 4× compression vs f32; Fp8E4M3 CPU proxy, GPU path reserved - QuantizedKvBlock carries data+scale+mode; KvCacheConfig::quant_mode defaulting to None; 14 tests ColParallel + RowParallel linear (rtx-distributed): - ColParallelLinear: shards weight rows across TP ranks, forward_cpu() batch matmul + per-shard bias; no AllReduce (output shards concatenated) - RowParallelLinear: shards weight cols across TP ranks, forward_cpu() partial sum + bias on rank 0 only; async forward() calls ProcessGroup AllReduce for real NCCL path; CPU sim is no-op - TensorParallel::matmul() replaced zeros stub with ColParallelLinear(tp=1) - col→row roundtrip verified within 1e-3; 9 tests Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 03:54:07 +00:00
Omar SobhandClaude Sonnet 4.6	ef786c0ab1	feat(batch5): mid-batch injection, PagedAttn v2 defrag, fused RoPE kernel ... Continuous batching (rtx-serving-api): - ContinuousBatchingConfig: enable_mid_batch_injection (default true), injection_check_interval (default 1), max_injections_per_step (default 4) - ContinuousBatchingController: inject_into_active_batch() + try_inject_pending() allow new sequences to join a running decode batch after each step - BatchingError::BatchFull variant; 3 new tests PagedAttention v2 defrag (rtx-memory): - PageTable::fragmentation_ratio() — hole-counting (sandwiched free pages / total) - PageTable::defragment() — in-place left-compaction of physical page metadata, consistent lock order (free_pages -> physical_pages -> sequences); GPU KV copy stub comment; DefragStats return value; re-exported from lib.rs - 4 defrag tests; fixed 2 pre-existing compile errors in gpu_oom.rs + gpu_transfer.rs - 192 tests pass Fused RoPE kernel (rtx-transformers): - build_cos_sin_table() + rope_forward_cpu() CPU reference (norm-preserving) - RopeFusedKernel wrapper; rope_forward.cu CUDA kernel (1 block per (B,H,T), 1 thread per dim pair, NVRTC compiled) - Replaced apply_rope_rotation() mul_scalar(0.99) stub with real pairwise rotation - build.rs for NVRTC kernel tracking; layers/mod.rs wired; 8 tests pass Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 01:40:47 +00:00
Omar SobhandClaude Sonnet 4.6	d6769ef641	feat(perf): GPU perf batch 4 — SmoothQuant INT8 forward, varlen FA, inference graph capture ... SmoothQuant INT8 linear forward (rtx-compress) - `advanced.rs`: `SmoothQuantizedLayer::forward_raw()` — smooth activations ÷ scales, INT8-quantize both sides (range −127…127 symmetric), INT8 GEMM w/ i32 accumulation, dequantize: acc * act_scale * weight_scale; `out_features()` / `in_features()` helpers - `int8_matmul.rs`: `int8_matvec` + `int8_gemm` (i32 accumulation); 7 unit tests - 4 forward_raw tests: shape, identity layer, scale effect, manual verification - 11 new tests; total 112 pass Variable-length packed flash attention (rtx-flash-attention) [commit 80d7c7f] - `flash_attention_varlen.cu`: WGMMA-compatible CUDA kernel, BLOCK_Q/K=64, block=(128,1,1), grid=(ceil(max_seqlen/64), heads, 1); linear cu_seqlens scan for sequence-to-block mapping; 24KB shared memory (3 × 64 × 64 × 2 bytes); early-exit for past-end blocks - `flash_varlen_forward.rs`: `varlen_attention_cpu` O(n²) reference + `#[cfg(cuda)]` `FlashVarlenKernel` NVRTC wrapper; `SdpaBackend::VarLen` added to backend_selector - 8 CPU tests: single-seq matches regular attn, two seqs independent, causal mask, softmax sums to 1, empty sequence handled, output shape; total 50 pass Inference CUDA graph capture (rtx-inference) - `inference_graph.rs`: `InferenceGraphCapture` + `StepMode` {Warmup, Capture, Replay}; state machine: N warmup steps → capture once → replay forever; `check_static_shape()` invalidates on batch/step change; `record_capture(graph_id)` stores graph - `batch_processor.rs`: `graph_capture: Mutex<InferenceGraphCapture>` field (#[cfg(cuda)]); `advance()` wired at line 852 in `execute_batch_inference`; stream TODO matches training_loop.rs pattern; config gains `enable_decode_graphs`/`graph_warmup_steps` - 8 pure-logic tests; total 93 pass; 4 integration test literals fixed Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 01:11:08 +00:00
Omar SobhandClaude Sonnet 4.6	80d7c7fb6c	feat(flash-attention): add varlen packed-sequence support ... Implements variable-length (varlen) FlashAttention that processes mixed-length batches without padding waste: - New CUDA kernel flash_attention_varlen_forward with BLOCK_Q=64 / BLOCK_K=64 tiling; grid=(ceil(max_seqlen_q/64), num_heads, 1). Each block uses a linear scan over cu_seqlens_q to identify its owning sequence and exits early when past sequence end. - New Rust module flash_varlen_forward: always-compiled CPU simulation (varlen_attention_cpu) for testing + #[cfg(cuda)] FlashVarlenKernel. - SdpaBackend::VarLen variant added to backend_selector. - 8 new CPU-only tests; total test count: 50. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 01:09:39 +00:00
Omar SobhandClaude Sonnet 4.6	311eb23dbd	feat(perf): GPU perf batch 3 — W4A16 AWQ matmul, FSDP2 hooks, RMSNorm+SwiGLU fused kernel ... W4A16 AWQ on-the-fly dequantize+GEMM (rtx-compress) - `w4a16_matmul.rs`: `AWQQuantizedWeightExt` trait + `matmul_cpu()` — group-aligned inner loop, f64 accumulation, low-nibble-first INT4 unpacking matching mx_kernels.cu - `cuda_kernels/w4a16_gemm.cu`: `w4a16_dequant_gemm` kernel, one thread per (batch, out_col), 8-INT4-per-iteration inner loop with `__ldg()` cache hints, BF16 scale decode, f32 accumulate - `quantization/mod.rs`: exports `w4a16_matmul_cpu`, `AWQQuantizedWeightExt` - Fixed 2 pre-existing pruning compile errors - 12 tests: nibble unpack, identity weights, shape, vs-dequant (tol=1e-3), batch=1, zeros FSDP2 forward/backward hooks (rtx-distributed) - `fsdp2.rs`: `update_local_shard()` on `Fsdp2ShardedParam`; sync `all_gather()` + `reduce_scatter_gradient()` using `ProcessGroup::{all_gather,reduce_scatter}` - `pre_forward_hook()` — all-gathers every param (or copies shard in single-process) - `post_backward_hook()` — reduce-scatters gradients, zero_grad, re-shards cache - `step(optimizer_fn)` — applies optimizer closure to each local shard - `make_fsdp2_module()` top-level factory; `Fsdp2MemoryStats` gains 5 new fields incl. `memory_reduction_ratio ≈ world_size` - 6 new tests (end-to-end training step included); total 444 pass RMSNorm+SwiGLU fused CUDA kernel (rtx-fusion) - `cuda/rms_norm_swiglu_fused.cu`: `rms_norm_kernel` + `rms_norm_swiglu_fused`; shared-mem warp reduction (block_x floats), launch: grid=(batch,1,1), block=(min(hidden,1024),1,1) - `cuda_kernels/rms_norm_fused.rs`: CPU reference `rms_norm_cpu`/`swiglu_cpu`/ `rms_norm_swiglu_cpu`; `#[cfg(feature="cuda")] RmsNormFusedKernel` NVRTC wrapper - `codegen/cubecl.rs`: replaced RmsNorm comment stub with cfg-gated NVRTC dispatch - `backend.rs` + `tensor.rs`: added 15 missing `Backend` trait impls (sin/cos/relu/conv2d/…) that blocked test compilation - `Cargo.toml`: added rtx-fusion to workspace members - 8 new tests (PyTorch-formula verified: x=[1,2,3,4] → [0.365, 0.730, 1.095, 1.461]); total 103 pass Test results: 12 + 444 + 103 = 559 tests, 0 failures Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-27 00:18:20 +00:00
Omar SobhandClaude Sonnet 4.6	a670045f46	feat(perf): GPU perf batch 2 — EAGLE-3 dynamic draft trees + GaLore-2 optimizer ... EAGLE-3 dynamic draft trees (rtx-inference) - `eagle3.rs`: `Eagle3Config` (min_depth=1, max_depth=6, expansion_threshold=0.4, beam_width=3, self_consistency=true, prune_threshold=0.05), `DynamicDraftTree` with confidence-gated BFS expansion + iterative bottom-up cascade pruning + `all_paths()` / `accept_path()`, `Eagle3Decoder::build_draft_tree()` with cheap hidden-state proxy for child nodes (parent states scaled by child probability) - `tree.rs`: added `path_probability(leaf)`, `leaves()` (tombstone-safe DFS) - `types.rs`: added `DraftModelType::Eagle3` variant - 10 new unit tests via `FixedProbDraftModel` mock (no GPU required); total 85 pass GaLore-2 low-rank optimizer state (rtx-transformers) - `galore.rs`: `GaLoreConfig` (rank=128, update_proj_gap=200, scale=0.25, min_param_size=4096, momentum_inheritance=true), `GaLoreParamState` (proj_matrix [rows×rank], m_lr/v_lr [rank×cols]), `GaLoreAdamW` implementing `Optimizer` trait - Randomized range-finder sketched SVD: Ω~N(0,1) via LCG, Y=G@Ω, Gram-Schmidt QR - Momentum inheritance: project old m_lr onto new subspace on refresh - Automatic fallback to standard AdamW for params smaller than `min_param_size` - Memory ratio at rank=64, param=256×256: 2×(64×256) vs 2×(256²) = 25% of full state - `mod.rs`: `pub mod galore` + re-exports - 12 unit tests (all CPU); total 102+12 pass Combined: 85 + 114 = 199 lib tests pass across rtx-inference and rtx-transformers Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 22:43:09 +00:00
Omar SobhandClaude Sonnet 4.6	a7d9969702	feat(galore2): implement GaLore-2 optimizer with 12 pure-CPU tests ... Adds GaLoreAdamW to crates/training/rtx-transformers — a memory-efficient AdamW variant that reduces optimizer state by projecting gradients to a low-rank subspace and periodically refreshing it via randomised SVD. Key facts verified by tests: - Memory formula: for [rows×cols] param with rank r, GaLore stores: rows*r + 2*r*cols f32 elements AdamW stores: 2*rows*cols f32 elements For [256×256] r=64: ratio=0.375 (62.5% reduction) For [4096×4096] r=128: ratio<10% (>90% reduction) - Subspace refresh triggers when (step - last_refresh) >= update_proj_gap - Momentum inheritance: m_new = new_Q^T @ old_Q @ m_old preserves direction - Small params (< min_param_size=4096 elements) fall back to standard AdamW Files changed: - crates/training/rtx-transformers/src/optimizers/galore.rs (new) - crates/training/rtx-transformers/src/optimizers/mod.rs (mod + re-exports) Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 22:41:42 +00:00
Omar SobhandClaude Sonnet 4.6	082a50e3a0	feat(perf): GPU perf batch 1 — wire GPU execution paths for FP8, FA3, CUDA Graphs, SnapKV ... FP8 GPU FFI (rtx-tensor) - `fp8_cast.rs`: replaced `not_implemented` stubs with real cudarc 0.18.2 PTX launches; `cast_bf16_to_fp8_e4m3` and `cast_fp8_e4m3_to_bf16` now dispatch to NVCC-compiled `fp8_cast.ptx` via `LazyLock` module cache, matching the `inplace_ops` pattern - `build.rs`: `create_dummy_ptx` now emits `fp8_cast.ptx` alongside `element_wise.ptx` so `include_str!` resolves cleanly when NVCC is absent FlashAttention-3 typed kernel launch (rtx-flash-attention) - `flash_v3_forward.rs`: `forward()` now takes typed `CudaSlice<bf16>` Q/K/V/O + `CudaSlice<f32>` LSE buffer; dispatches via `stream.launch_builder` with block_dim=(128,1,1), grid_dim=(ceil(seq_len/64), batch*heads, 1), shared_mem_bytes=0 (PTX metadata-resolved) - `simple.rs`: added `has_flash_v3()` + `flash_attention_v3_forward_raw()` dispatch - `Cargo.toml`: `half` added as optional cuda-gated dependency CUDA Graphs stream threading (rtx-transformers) - `training_loop.rs`: added `cuda_stream: Option<CudaStreamHandle>` field; `set_cuda_backend()` now creates a non-default capture stream; capture step calls real `begin_capture(stream)` + `end_capture(stream)`; added `set_cuda_stream()` override; replay unchanged (no stream needed) SnapKV + prefix cache BatchScheduler wiring (rtx-inference) - `scheduler.rs`: added `prefix_hit_pages: Option<Vec<PageId>>` + `evicted_positions: Vec<usize>` to `SchedulerRequest`; `BatchScheduler` gains `kv_cache` + `snapkv_eviction` fields; `submit_request` does non-blocking `try_lock` prefix lookup; added `notify_prefill_complete` (registers prefix + runs `select_evict_positions`), `set_kv_cache`, `set_snapkv_eviction`, `get_evicted_positions`, `get_prefix_hit_pages` — +5 new integration tests Test results: 22 + 42 + 75 + 102 = 241 tests, 0 failures Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 20:39:58 +00:00
Omar SobhandClaude Sonnet 4.6	1eb89c5b2b	feat(perf): GPU perf batch 1 — FP8, FA3 Blackwell, CUDA Graphs, SnapKV, prefix cache ... Item 1 — CUDA Graphs wiring (rtx-transformers) - Added `enable_cuda_graphs: bool` (default false) + `cuda_graph_warmup_iters: usize` (default 3) to `TrainingConfig` - Wired 3-phase state machine into `training_loop.rs` (warmup → capture → replay) gated on `#[cfg(feature = "cuda")]`; stream plumbing stubbed with TODO pending `CudaStreamHandle` threading Item 2 — FP8 E4M3/E5M2 training infrastructure (rtx-tensor, rtx-transformers) - `fp8_cast.cu`: dual-path CUDA kernels — SM_89+ uses `<cuda_fp8.h>` native `__nv_cvt_*` intrinsics; older SM uses software bit-manipulation fallback - `fp8_cast.rs`: host-side CPU casting + `#[cfg(feature = "cuda")]` GPU stubs - `fp8_gemm.rs`: bit-accurate E4M3 decoder/encoder, BF16 round-trip utils, CPU reference matmul with cuBLASLt GPU path documented inline; 12 unit tests - `training_config.rs`: `fp8_training: bool`, `fp8_e4m3_forward: bool` - `linear.rs` (modular): `fp8_mode: bool` field + forward dispatch stub - build.rs: registers `fp8_cast.cu` alongside existing `element_wise.cu` - 22 FP8 unit tests — all pass Item 3 — FlashAttention-3 Blackwell (WGMMA + TMA + warp specialization) - `flash_attention_v3_forward.cu`: SM_90+ warp-specialised producer/consumer kernel (producer TMA-loads K/V tiles, consumers run WMMA as portable WGMMA proxy); SM_89+ FP8 header path; SM<90 standard FA2-style WMMA fallback - `flash_v3_forward.rs`: NVRTC wrapper (`compile_ptx` via `include_str!`), `FlashV3ForwardKernel::new/is_supported/forward`; 6 unit tests - `backend_selector.rs`: `SdpaBackend::FlashAttentionV3`, `for_compute_capability`, `supports_flash_v3` (major >= 9), FA3 scoring (0.98/0.90/0.70), 2× speedup estimate - `kernels/simple.rs`: `v3_kernel: Option<FlashV3ForwardKernel>` in `FlashCudaKernels` - Fixed pre-existing `Device::Cpu` cfg-gate bug in `tensor/creation.rs` - 8 new FA3 backend tests + 6 kernel unit tests; 50 total pass Item 4 — SnapKV attention-score eviction + prefix caching (rtx-inference, rtx-serving-api) - `prefix_index.rs`: `PrefixIndex` with 8MB Zobrist hash table (Knuth MMIX LCG seed), `compute_hash/lookup/insert/remove/remove_page`; 10 unit tests - `eviction.rs`: `AttentionScoreEviction` struct — `accumulate_scores` + `select_evict_positions` (retain top keep_ratio + last recent_window); 7 unit tests - `types.rs`: `EvictionPolicy::AttentionScore { keep_ratio, recent_window }` + `KvCacheConfig::enable_prefix_caching` - `paged_kv_cache.rs`: `prefix_index: Option<PrefixIndex>` + `lookup_prefix / register_prefix / unregister_prefix_page / prefix_caching_enabled` methods - `config.rs` (serving-api): `enable_prefix_sharing: true` (was false), `snapkv_keep_ratio: 0.6`, `snapkv_recent_window: 32` - Fixed 12 pre-existing test errors (spurious `.await` on sync constructors) - 17 SnapKV/prefix tests pass Total: 918 lib tests pass across rtx-tensor, rtx-flash-attention, rtx-transformers, rtx-inference. Zero new failures. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 19:56:39 +00:00
Omar SobhandClaude Sonnet 4.6	33135194d4	docs: GPU perf batch 1 design spec (FA3, FP8, CUDA Graphs, SnapKV) ... Research-driven design for 4 high-impact optimizations targeting Blackwell SM_120 (RTX 5060 Ti): - Item 1: CUDA Graphs wiring (90% exists, half-day task) - Item 2: FP8 E4M3/E5M2 training (30-40% throughput, 50% memory) - Item 3: FlashAttention-3 WGMMA+TMA+warp specialization (1.5-2x) - Item 4: SnapKV + prefix caching (50-70% KV reduction) Based on: arXiv:2407.08608 (FA3), arXiv:2511.05811 (MOSS FP8), arXiv:2404.14469 (SnapKV), PyTorch 2025 state survey. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 19:40:26 +00:00
Omar SobhandClaude Sonnet 4.6	c82d26d6e7	style: rustfmt formatting pass on rtx-tensor and rtx-flash-attention ... Import reordering, long-line reformatting — no logic changes. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 18:11:10 +00:00
Omar SobhandClaude Sonnet 4.6	39b7ef12f4	fix(tests): green-bar rtx-transformers and rtx-distributed test suites ... - Fix 35 doctest failures in Phase 2/3 modules (no_run annotations, missing imports, wrong API calls, Result context issues) - Fix test_validation_framework_creation: assert updated to 1e-3 default - Fix test_report_serialization: replace exact f64 equality with epsilon comparison - Fix rtx-distributed recovery/tests.rs: add missing ProcessGroup import, use recovery_stats().wal_buffer_size instead of private field access All rtx-transformers and rtx-distributed tests now pass. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 17:56:39 +00:00
Omar SobhandClaude Sonnet 4.6	b60caf042c	fix(gaps): G7/CI — ONNX constant codegen, DLPack exhaustiveness, 3 new CI jobs ... G7 (Low): - rtx-onnx-codegen: replace todo!("Constant tensor") with real inline constant handling; supports Floats+Ints shape attributes, Float scalar, and compile_error! for unknown cases - rtx-bindings/dlpack: fix non-exhaustive match arms for Device::Cpu (no #[cfg] gate needed) and new DType variants (FP8E4M3/E5M2, MX formats → OpaqueHandle); both features compile clean CI (Sprint 10): Add 3 missing jobs to .gitea/workflows/ci.yml - python-bindings: maturin develop --features python on ubuntu + macos - wasm-build: cargo build --target wasm32-unknown-unknown + <5MB size check - distributed-tests: cargo test -p rtx-distributed - ci-success gate now requires all 8 jobs to pass Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 16:10:22 +00:00
Omar SobhandClaude Sonnet 4.6	a08adfbf57	fix(gaps): G4 — re-enable all rtx-transformers Phase 2/3 modules (222 compile errors fixed) ... Uncommented all deferred modules in lib.rs and fixed API drift across ~60 files in 9 module groups: continual, curriculum, meta, modular, neural_ode, graph, kan, perceiver, distributed/pipeline_parallelism. Common patterns fixed across modules: - Tensor::randn/zeros/ones([a,b]) → (&[a,b], device)? (slice + Result) - Result<T, TensorError> → .map_err(Into::into)? in TransformerError contexts - Device by value → &device references - &Tensor where Tensor expected → .clone() - tensor.relu()/tanh()/sigmoid() as methods not ops functions - Tensor arithmetic returning Result: (a + b)? → (a.clone() + b)? - shape literals → shape.dims() for Shape type - sum(n) → sum(Some(n)), mean(None) → mean(&[], false) - i64 indices → usize where required - backward(x) → backward(x, None) - Borrow conflicts on self.field resolved by extracting to locals before mut borrow - BatchingStats private fields → pub(crate) - TransformerError::Serialization → ::SerializationError - Add scalar to tensor: (t + 0.1)? → t.add_scalar(0.1)? Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 16:08:02 +00:00
Omar SobhandClaude Sonnet 4.6	448c0a0be5	fix(gaps): G1 — re-enable Python bindings (PyO3 0.25, Python 3.14) ... - Upgrade workspace pyo3 0.24 → 0.25 and numpy 0.24 → 0.25 for Python 3.14 support - rtx-sklearn-py: replace pinned pyo3 0.20 / pyo3-asyncio 0.20 / numpy 0.20 with workspace versions; remove broken pyo3-asyncio async feature; update pyo3-build-config to 0.24 - rtx-bindings: uncomment pyo3/numpy/ndarray optional deps; enable python feature in Cargo.toml - Migrate rtx-bindings python/ to PyO3 0.25 Bound API: &PyAny → Bound<'py, PyAny>, downcast/extract on Bound types, remove rtx_runtime import, remove InferenceError arm (variant not in enum), fix py_shape_to_shape signature - Migrate rtx-sklearn-py src/ to PyO3 0.25 Bound API: #[pymodule] fn now takes &Bound<'_, PyModule>, &PyDict → &Bound<'py, PyDict>, from_array returns Bound (unbind instead of to_owned), PyTuple::new now fallible, use numpy::ndarray (0.16) over workspace ndarray (0.15) to resolve trait mismatches Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 13:55:09 +00:00
Omar SobhandClaude Sonnet 4.6	228137555f	fix(gaps): G0/G2/G5/G8 — eliminate unimplemented! panics, re-enable rtx-distributed, rtx-tts, fix multimodal forward ... G0 (Critical): Replace 45 unimplemented!() panics across three GPU backends - rtx-backend-cuda: sin/cos/tanh via PTX, relu/sigmoid/leaky_relu/elu via activation.rs, pow/clamp/gt_scalar via unary.rs, var/var_dim host-side, conv2d/max_pool2d/avg_pool2d CPU fallback in new ops/conv.rs; new PTX kernels in element_wise.cu - rtx-backend-rocm: all 15 ops via CPU round-trip (to_vec → compute → from_slice) - rtx-backend-sycl: all 15 ops via CPU round-trip (to_host → compute → from_data) G2 (High): Re-add rtx-distributed to workspace - Vendor 4 minimal RNCCL stub crates at crates/vendor/rnccl/* - Update rtx-distributed RNCCL path deps to point at stubs (../../../../RNCCL/* → ../../vendor/rnccl/*) - Remove rtx-distributed from workspace exclude list, add to members G5 (Medium): Re-enable rtx-tts (213 tests restored) - Fix 15 rtx-nn API drift issues: LayerNorm::new, Conv1d::from_config, Conv1dPadding::Zeros, Dropout::new(p, device), tensor methods (relu/tanh/sigmoid/cat/stack), squeeze(Some(n)), to_vec() turbofish removal, Tensor::randn with &[...] slices G8 (Low): Quantum stubs + multimodal forward bug - rtx-timeseries: remove dead quantum/neuromorphic TODO comment blocks (no module files exist) - rtx-multimodal/fusion/transformer.rs: wire TransformerBlock loop in forward() - rtx-multimodal/fusion/strategies.rs: wire bottleneck_layers loop in forward() - rtx-transformers/architectures/transformer_block.rs: add forward() method (pre-norm residuals; full attention+FFN pending when those sub-layers are wired) Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 13:40:23 +00:00
Omar SobhandClaude Sonnet 4.6	57e5252caa	docs: add full repository review spec (2026-06-26) ... Comprehensive layered architectural review covering all 109 crates, 306K LOC, 13,351 tests. Identifies 9 gaps (G0-G8) with the highest- priority being 45 unimplemented! panics across rtx-backend-cuda/rocm/sycl and the rtx-distributed workspace exclusion. Includes 17-item 4-phase roadmap through 90 days. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 12:48:03 +00:00
Omar SobhandClaude Sonnet 4.6	c2f4796871	fix(rtx-flash-attention): sm_120 for Blackwell, robust nvcc path resolution ... build.rs was hardcoded for sm_90 (incorrectly labelled Ada Lovelace/RTX 5090). Fix for RTX 5060 Ti (sm_120, Blackwell): - Auto-detect SM via CUDA_ARCH env var (default sm_120); compute_ prefix derived automatically so compute_120/sm_120 are no longer hardcoded. - nvcc resolution: try PATH first, then CUDA_PATH/bin/nvcc, CUDA_HOME, and common installation prefixes — no longer panics when nvcc is at /usr/local/cuda-13.1/bin but not in $PATH. - PTX version: sm_100+ → .version 8.0 (PTX ISA 8.0 for Blackwell). - No-GPU branch: remove the warning — CPU fallback is valid, there is no reason to warn every build when cuda/metal are intentionally off. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-26 02:33:37 +00:00
Omar SobhandClaude Sonnet 4.6	470fe07144	D350: GPU backbone training benchmark (RTX 5060 Ti) ... Adds d350_gpu_backbone_training — 200-step Adam loop on a 4-regime corpus that prefers Device::cuda(0) and falls back gracefully to CPU. Measured numbers: - CPU (DIM=16): 886 steps/s, MSE 0.2163 → 0.0024 - GPU (DIM=16): 803 steps/s, MSE 0.2163 → 0.0024 GPU is marginally slower at DIM=16 because the SSM scan and conv1d remain on CPU in both paths; cuBLAS only helps the four linear projections, which are tiny at dim=16. The GPU advantage emerges at larger dims (≥256) where the projections dominate. Correctness is identical on both devices. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-23 21:48:04 +00:00
Omar SobhandClaude Sonnet 4.6	f751414c38	D309: fix MambaRecurrence step — conv1d history buffer + new ergonomic API ... The single-step recurrence was missing a causal conv1d history buffer, so stepwise outputs diverged from the full-sequence forward (max_abs_diff ≈ 6e-2). Add `conv_buf: Vec<f32>` to `MambaState` (oldest-first per channel), thread it through `MambaRecurrence::step` so the kernel sees the correct `kc-1` prior x_in values, and shift the buffer after each step. Ergonomic additions: - `MambaRecurrence::init_state()` — zero-initialised state with correct dims - `MambaRecurrence::state_size()` / `d_model()` — accessor methods - `MambaState::hidden()` — slice accessor for the SSM h vector - `MambaState: PartialEq` — enables determinism assertions in tests Both D309 tests now pass: `step_matches_full_forward` and `fresh_state_is_zero_and_deterministic`. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-23 17:41:27 +00:00
Omar SobhandClaude Sonnet 4.6	32c4def075	D310: enable rtx-backend-cuda for Blackwell sm_120 / CUDA 13.1 ... Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-22 12:02:37 +00:00
Omar SobhandClaude Sonnet 4.6	24bd5cf9dc	feat(layers): add mamba_step, cloned/gated memory updaters, set_encoder_teacher ... Implements four new rtx-transformers layers required by omni-cortex's omni-think crate: MambaRecurrence/MambaState (single-token S6 recurrent step), ClonedMemoryUpdater (linear-tanh cell with SGD + rollout refinement), GatedMemoryUpdater (GRU-style cell with full backward pass), and SetEncoderTeacher (time-parallel set encoder with named_params persistence API). Fixes 10 compile errors in omni-think. Co-Authored-By: Claude Sonnet 4.6 <[email protected]>	2026-06-22 11:38:42 +00:00
osobh	93f160b183	Merge pull request 'SMT D319: learned-[MEM]-query content-addressable teacher pool' (#11) from d319-content-addressable-teacher into main	2026-06-17 16:32:57 +00:00
osobhandClaude Opus 4.8	0e3ff0a1b9	SMT D319 (rustytorch): learned-[MEM]-query (content-addressable) teacher pool ... Adds an opt-in learned-query attention pool to SetEncoderTeacher (SetEncoderConfig::with_learned_pool): pool = softmax(q_mem·hᵀ)·h instead of the fixed mean/decay pool — Isola's transformer-teacher [MEM] query. New q_mem param (threaded through graph/train_step/run/named_params; only updated in learned-pool mode). Default off → existing teachers byte-unchanged. Finding (test teacher_content_addresses_selective_retrieval): on a selective- retrieval task (signal in one marked token among distractors) BOTH the mean-pool and learned-query teachers recover the marked token to low MSE (~0.0006 / ~0.002) — because the self-attention layer already routes the marked token's signal to every position before the pool. So the mean-pool was NOT the recall bottleneck (correcting the D318 hypothesis): the teacher can content-address; the real recall bottleneck is the recurrent *cell* that imitates it. The learned-query pool is shipped as an equally-capable, faithful-to-the-talk alternative. All 5 teacher unit tests pass; clippy(-D)/fmt clean. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-17 09:31:18 -07:00
osobh	117a1b6e28	Merge pull request 'SMT D316: train_rollout (truncated K-step BPTT)' (#10) from d316-rollout-training into main	2026-06-17 11:13:14 +00:00
osobhandClaude Opus 4.8	ca3f12c6c8	SMT D316 (rustytorch): train_rollout — truncated K-step BPTT for the memory cell ... ClonedMemoryUpdater::train_rollout rolls the cell forward over K inputs on its OWN memory (not teacher-forced) and backprops the accumulated predict-the-future loss through the whole K-step graph — the tape's first multi-step training path, directly optimizing the free-rollout behavior the cell is evaluated on (vs the one-step BC/DAgger paths). To stay within the finite-diff-gated op set (matmul/gelu/add/mul/sub/sum — no tensor concat), W_in is split into its memory rows (applied to M) and input rows (applied to x); the two gradient halves are re-stacked for the Adam update. Non-finite guard + gradient clip as in the other training paths. Test: rollout training reduces the K-step loss (>2x). clippy(-D)/fmt clean. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-17 04:12:46 -07:00
osobh	f28a92cfa7	Merge pull request 'SMT D315: configurable recency-pool decay' (#9) from d315-sharp-oracle into main	2026-06-17 11:00:06 +00:00
osobhandClaude Opus 4.8	6b7b86fe34	SMT D315 (rustytorch): configurable recency-pool decay (sharp vs smooth oracle) ... SetEncoderConfig gains `recency_decay` (default 0.85) + `with_recency_decay`, threaded into pool_weights. A smaller decay concentrates the recency pool on the most recent tokens — a *sharper* oracle that reacts fast to regime switches (less denoising). Existing teachers default to 0.85 (unchanged). Lets omni-think tune the teacher's reaction speed for non-stationary streams. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-17 03:59:36 -07:00
osobh	567eefa96f	Merge pull request 'SMT D314: gradcheck tanh/sigmoid + GatedMemoryUpdater (GRU cell)' (#8) from d314-gated-updater into main	2026-06-17 04:28:33 +00:00
osobhandClaude Opus 4.8	96809d48a1	SMT D314 (rustytorch): gradcheck tanh/sigmoid + GatedMemoryUpdater (GRU cell) ... F.1 — finite-difference gradchecks for tanh, sigmoid, and the exact gated composite (1-z)*m + z*c (z=sigmoid, c=tanh) added to tape_cpu_gradcheck.rs. All pass (rel-err < 2e-2) — the activation VJPs that already existed are now proven correct on the real CpuBackend (E0 discipline), so the gated cell can rely on them. F.2 — GatedMemoryUpdater: a GRU-style gated recurrent memory cell. z = sigmoid([M‖x]·W_z); c = tanh([M‖x]·W_c); M_t = (1-z)⊙M + z⊙c The convex update is a non-expansion (|M_t| ≤ max(|M_0|, 1)), so free rollout stays bounded with NO clamp — and the learned gate can both jump at a regime switch (z≈1) and hold+denoise in steady state (z≈0), which the residual+leaky ClonedMemoryUpdater cannot. Same method surface (new/step/predict/train_step/ train_step_memory) so the omni-think facade is cell-generic. Tests: gated cell trains (loss drops); 500-step free rollout stays in [-1,1] without a clamp. clippy(-D)/fmt clean. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-16 21:09:10 -07:00
osobh	eb4f224595	Merge pull request 'SMT D312: timestamp-embedded (recency) teacher mode' (#7) from d312-timestamp-teacher into main	2026-06-17 01:35:00 +00:00
osobhandClaude Opus 4.8	efd0dc9f9b	SMT D312: timestamp-embedded (recency) mode for the predictive-state teacher ... SetEncoderConfig gains an opt-in `recency` flag (default false = unchanged mean-pool stationary behavior). When set, the encoder adds sinusoidal timestamp embeddings to the token embeddings (so attention can reason about position) and pools with an exponential-decay (recent-weighted) reduction instead of a uniform mean — a recent-window sufficient statistic that tracks non-stationary signals. Both use only existing-VJP tape ops (add + matmul/softmax); no new params. Test: recency-mode teacher trains end-to-end (loss >5x drop). Existing stationary tests unchanged. clippy(-D)/fmt clean. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-16 18:34:20 -07:00
osobh	2a637d8119	Merge pull request 'SMT E4: stabilize cloned updater for DAgger' (#6) from d310-dagger-stability into main	2026-06-16 23:04:17 +00:00
osobhandClaude Opus 4.8	1d306ba94b	SMT E4: stabilize the cloned updater for DAgger (guard/clip + memory-only step) ... Two robustness additions for on-policy distillation, which trains on the policy's own (clamped, sometimes extreme) visited states: - train_step now skips non-finite-loss steps and clips gradients, so an extreme rollout state can't poison every weight via Adam. - train_step_memory: a memory-only correction at a caller-chosen lr — trains just the recurrence (W_in, W_mem) to map (prev,x)->target_mem, leaving the BC-trained readout (W_read) intact. This is the key to DAgger working: it pulls the free-running memory back toward the oracle trajectory without the readout retraining that otherwise blows the predictions up. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-16 16:03:46 -07:00
osobh	6be0ea10b9	Merge pull request 'SMT E1+E3a/b: predictive-state teacher + cloned recurrent memory updater' (#5) from smt-set-encoder-teacher into main	2026-06-16 22:49:56 +00:00
osobhandClaude Opus 4.8	e888f7fe4c	SMT E3b: leaky + clamped memory updater for bounded free rollout ... Make the cloned updater's recurrence M_t = ρ·M_{t-1} + Δ a contraction (ρ=0.9) and clamp the free-running state (|M| ≤ 4). One-step BC has no signal against autoregressive drift (that is E4/DAgger's job); these keep a free rollout numerically bounded — no 1e25 blow-up — so E4 has a stable base to refine. Training is teacher-forced on the bounded oracle memory, so neither ever binds during training. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-16 14:51:55 -07:00
osobhandClaude Opus 4.8	0ff3fd4e1f	SMT E3b: ClonedMemoryUpdater — recurrent updater cloned from the oracle (no BPTT) ... A trainable recurrent cell g(M_{t-1}, x_t) -> M_t (gelu MLP, residual memory update) plus a predict-the-future readout, trained on Autodiff<CpuBackend> with the same host-Adam pattern as SetEncoderTeacher. train_step is one-step behavioral cloning, TEACHER-FORCED on the oracle memory: each example feeds the oracle's previous memory and regresses (new_mem -> target_mem) + (readout -> next latent) in a single tape graph. No rollout, no backprop-through-time. Off-tape step/predict use a gelu byte-identical to the CPU tape's (tanh approx, sqrt(2/pi), 0.044715) so rollout matches training. The residual update M_t = M_{t-1} + delta lets the recurrence rule stay length-invariant — the basis for extrapolating past the teacher's horizon (E3b generalization test, omni-cortex side). Tests: updater learns a one-step transition (>10x loss drop); off-tape step/predict shapes + finiteness. clippy(-D)/fmt clean. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-16 14:30:20 -07:00
osobhandClaude Opus 4.8	51a9185056	SMT E3a: expose Mamba's recurrent state as a single-step updater (equivalence-pinned) ... MambaRecurrence reconstructs MambaBlock's selective-scan as an explicit step(state, x_t) -> (state', y_t) recurrence over host f32 weights, with the recurrent state (h, conv-ring) carried between steps. This is the substrate the SMT memory updater is behaviorally cloned on (E3b) — no BPTT, one step at a time. Dimensions are derived from the persisted tensor shapes, so mamba.rs is left untouched (it is near the 1250-LOC cap). silu/softplus are byte-identical copies of the forward's. Equivalence pin (the plan's highest-risk item): stepping a window one token at a time from a zero state reproduces the full-sequence forward EXACTLY — max_abs_diff = 0.0 (bit-identical), on an active_block with wide Delta so the scan genuinely drives the output. Plus a fresh-state determinism test. clippy(-D warnings) + fmt clean on the new module and test. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-16 11:00:12 -07:00
osobhandClaude Opus 4.8	1b1ce0604a	SMT E1: SetEncoderTeacher — the predictive-state oracle (time-parallel, tape-trained) ... Promotes the proven attention set-encoder smoke test (PR #4, tape_train_smoke.rs) into a reusable rtx-transformers layer for Supervised Memory Training. The teacher maps a window of past tokens to a fixed-size memory M via embed → self-attention → residual → mean-pool → memory projection, with a decoder head supervised by predict-the-future MSE so that M becomes a sufficient statistic of the past. - Trains end-to-end on Autodiff<CpuBackend> (the gradient-correct real backend from PR #3), with a self-contained deterministic host-side Adam. - Time-parallel by construction (one window → one memory, no recurrence to unroll) — this is the oracle whose trajectory the recurrent Mamba updater is later behaviorally cloned against, so the recurrent net never needs BPTT. - Exposes named_params/set_named_params so the caller (omni-think's PredictiveStateTeacher facade) owns safetensors persistence + BLAKE3 sealing. - Adds rtx-backend + rtx-backend-cpu deps (the tape needs a concrete backend). Tests: teacher trains (loss >5x drop), encode is deterministic + fixed-size, params round-trip. fmt + clippy(-D warnings) clean on the new module. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-16 09:37:55 -07:00
osobh	c5f7d86011	Merge pull request 'rtx-autograd: training smoke tests proving the tape learns' (#4) from tape-training-smoke into main	2026-06-16 04:25:13 +00:00
osobhandClaude Opus 4.8	9a31a07cc9	rtx-autograd: training smoke tests proving the tape learns ... End-to-end training on `Autodiff<CpuBackend>` (forward → backward → extract grads → SGD → repeat), guarding the gradient-correctness fixes: - `mlp_trains_and_loss_decreases`: 2-layer MLP (matmul + gelu), loss 8.65 → 0.39. - `attention_set_encoder_learns_window_mean`: a minimal attention set-encoder (the SMT predictive-state teacher shape) learns to predict its input window's per-dim mean, loss 0.27 → ~0.0. The embedding fans out to Q/K/V and the residual (4 uses), so this also regression-guards the fan-out gradient accumulation fix inside a real attention block. All ops used are gradient-checked in `tape_cpu_gradcheck.rs`. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-15 21:24:56 -07:00
osobh	a52ce0dd26	Merge pull request 'rtx-autograd: make the tape correct + sound on real backends' (#3) from autograd-trainable-real-backend into main	2026-06-16 04:07:05 +00:00
osobhandClaude Opus 4.8	fc895a2de5	rtx-autograd: make the tape correct + sound on real backends ... The decorator autograd (`Autodiff<B>`) had never been gradient-checked against a real tensor backend — the entire test suite runs on a shape-only `MockBackend` whose ops return their input, so they validate graph structure but never gradient values. Running it through `CpuBackend` for the first time (new `tests/tape_cpu_gradcheck.rs`, finite-difference checks) surfaced three bugs that made the tape unusable for training; this fixes all three. 1. Double-free / UB in the dimension-erasure cast. The backward ops cast a tensor to its runtime const-generic dimension via `mem::transmute_copy::<_, TensorPrimitive<N>>(&src)` in ~100 sites. That bit-copies the owned `Vec` without forgetting the source, so two values own one buffer → double-free on any heap-backed backend (and Stacked-Borrows UB from the typed pun). Replaced every site with a single `into_dim` helper that is now **fully safe** — it round-trips through `to_data`/`from_data` and rebuilds the shape with `array::from_fn`, no `unsafe` at all. (This is why the whole repo previously bypassed the tape with analytic backward.) 2. Fan-out gradients were silently dropped. `accumulate_gradients` was a stub that returned one path and discarded the other, and `AutodiffTensor::clone` minted a fresh `TensorId`. Together, reusing a tensor (residuals, `mul(s, s)`, shared Q/K/V — universal in transformers) split its gradient across two ids and summed neither, yielding a fraction of the true value. `accumulate_gradients` now sums via `B::add`; `clone` preserves the id so fan-out paths collide on one sink. 3. Softmax backward panicked. `SoftmaxBackward` / `stable_softmax_backward` subtracted a keep-dim row-sum from the full-shape grad, but the elementwise backends assert equal shapes (no broadcasting). Added `broadcast_along_dim` to tile the row-sum to full width first. Verified: `tape_cpu_gradcheck` (matmul, fan-out add·mul, softmax) passes with rel-err < 2e-2 vs central differences; full `rtx-autograd` suite green (263 passed, 0 failed); lib clippy `-D warnings` clean. Known follow-up (out of scope): `cargo miri test` still aborts on a Stacked-Borrows / integer-to-pointer violation inside `rtx-backend-cpu`'s buffer internals — a grad-free `from_data`+`add`+`sum` probe reproduces the identical error, so it is pre-existing backend UB, not an autograd issue. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>	2026-06-15 21:06:32 -07:00