Segment 10

In this sub-session, the assistant finalized Phase 2 of the cuzk proving engine by first committing the previously uncommitted batch-mode pipeline rewrite that supports all four proof types (PoRep, WinningPoSt, WindowPoSt, SnapDeals) with inlined circuit construction. Then the core architectural goal was implemented: true async overlap between CPU-bound synthesis and GPU-bound proving. The engine was restructured from per-GPU workers that sequentially synthesized and proved each proof to a two-stage pipeline with a dedicated synthesis task feeding a bounded tokio::sync::mpsc channel, with per-GPU workers consuming synthesized jobs from the channel. This allows synthesis of proof N+1 to overlap with GPU proving of proof N, with backpressure via the bounded channel to prevent OOM. An E2E GPU test on RTX 5070 Ti with 3 consecutive 32 GiB PoRep C2 proofs validated the architecture: total time dropped from an estimated ~270s (sequential) to 212.7s, with steady-state throughput improving from ~90s/proof to ~60s/proof (1.27x speedup). All 15 unit tests pass with zero warnings, the git state is clean with 3 Phase 2 commits, and the project is ready to move to Phase 3 (cross-sector batching) per the roadmap.

Commit batch-mode pipeline rewrite for all proof typesImplement async overlap synthesis-GPU pipeline with bounded channelValidate E2E GPU performance with 3 consecutive PoRep proofsClean git state and ensure all tests pass

The Async Overlap Pipeline: How Phase 2 of the cuzk Proving Engine Transformed Sequential Proof Generation into a Concurrent Powerhouse 2976 words

Chunks