jdcsen Portfolio, projects, and other work by Joshua David Christensen
Projects with the tag Triton

Paralinguistic Signals from a Speech LLM

  • NVIDIA Triton Python backend fronting a vLLM-served speech LLM, taken from prototype to production.
  • Derives confidence, sentiment and spoken-language ID from the model’s own token-level outputs. No additional models to train or serve.
  • Orchestrates per-signal LLM queries over gRPC alongside ONNX Runtime inference for confidence calibration and forced alignment.
  • p50 latency of approximately 5 to 10 ms per signal.
  • Technical lead for a three-engineer team. A later concurrency refactor took sustained throughput from roughly 8 to 80 requests per second.

Triton Backend Throughput Refactor

  • Load testing showed latency growing linearly with concurrency: the server was serializing, capping throughput at about 8 requests per second.
  • Three structural fixes: parallelize independent ONNX inference calls, replace a reference-counted five-thread dispatcher with single-threaded cooperative multitasking, and run several independent backend instances.
  • Latency curve went from linear to roughly square-root in concurrency; sustained throughput reached 64 to 80 requests per second on the same hardware, an 8 to 10x improvement.
  • Single-request latency barely moved (about 90 to 70 ms). This was a contention fix, not a per-request speedup.