Metrics

ViPPET reports two complementary families of runtime metrics, both routed through the metrics-manager microservice and streamed to the UI over a single Server-Sent Events (SSE) channel at /metrics/stream:

• Pipeline Performance — per-job throughput (FPS) and end-to-end latency emitted by the GStreamer pipeline itself (gvafpscounter, latency_tracer). Each sample is tagged with job_id and stream_id, so the dashboard can display per-job and per-stream values rather than a single global number.

• System Performance — host-level utilization (CPU, memory, GPU, NPU) collected continuously by Telegraf embedded in the metrics-manager container, independently of any pipeline run.

       ┌─────────────────────────┐
       │ GStreamer pipeline      │──┐  per-job FPS / latency  (HTTP POST)
       └─────────────────────────┘  │
                                    ▼
       ┌─────────────────────────┐  metrics-manager  ──▶  SSE /metrics/stream  ──▶  UI
       │ Telegraf (CPU/mem/      │──┘
       │   GPU/NPU collectors)   │  host telemetry  (Prometheus scrape)
       └─────────────────────────┘

Both data sources share the same delivery path, retention window and UI transport, which keeps the dashboard simple and consistent.