Segment 5
In this sub-session, the assistant completed the first real end-to-end validation of the cuzk proving pipeline by building with --features cuda-supraseal for GPU acceleration on an RTX 5070 Ti, starting the daemon with FIL_PROOFS_PARAMETER_CACHE=/data/zk/params, and submitting a 51 MB PoRep C1 output via gRPC. The first proof completed in 116.8 seconds including a ~15 second SRS parameter load, producing a valid 1920-byte Groth16 proof. A second proof with SRS already cached completed in 92.8 seconds, demonstrating a 20.5% improvement from SRS residency. Both proofs passed internal verification, and the daemon correctly tracked metrics, queue depth, and proof counts. Building on this validation, the assistant hardened Phase 0 with several improvements to ease Phase 1 development: tracing spans with job_id correlation so all upstream filecoin-proofs logs are tagged per-job; timing breakdown separating deserialization from proving time; per proof-kind Prometheus counters and duration summaries; GPU detection via nvidia-smi shown in status; a fixed AwaitProof RPC supporting late listeners; graceful shutdown via a watch channel; and a cuzk-bench batch command for sequential and concurrent throughput measurement. A sample config file (cuzk.example.toml) was also added. Two git commits were made on the feat/cuzk branch, checkpointing the scaffold and hardening phases.
The Hardening of cuzk: From First Real Proof to Production-Ready Observability