# Ros2_pulse: topic rates on a Grafana dashboard, now counting rclpy nodes and loaned messages

> **Key Architectural Takeaway:** Some updates on ros2_pulse since the first post ( Ros2_pulse: per-topic rates and node liveness, including intra-process, on stock binaries ), the LD_PRELOAD probe that counts per-topic rates and node liveness from the tracetools hooks instead of subscribing.

**Published:** 2026-10-14T16:34:03+00:00 
**Source:** ROS Robot Operating System News 
**Category:** robotics-science 
**Canonical URL:** https://fosswire.org/news/ros2pulse-topic-rates-on-a-grafana-dashboard-now-counting-rc.html 

## Executive Summary
Some updates on ros2_pulse since the first post ( Ros2_pulse: per-topic rates and node liveness, including intra-process, on stock binaries ), the LD_PRELOAD probe that counts per-topic rates and node liveness from the tracetools hooks instead of subscribing. Python nodes are counted on both sides now. Before, a Python subscriber’s deliveries never showed up, because rclpy isn’t instrumented.

## Architectural & Systems Analysis
From a Linux distribution, deployment reliability, and systems engineering perspective:

- **Dependency Determinism:** Declarative and isolated package trees guarantee reproducible execution across production hosts.
- **Platform Integration:** Tighter alignment with target hardware profiles improves driver interoperability and device stability.
- **Supply Chain Integrity:** Independent package verification and public build infrastructure prevent unauthorized supply-chain regressions.

## Impact on the Open Ecosystem
Strengthens transparent, community-governed distributions against closed software and proprietary lock-in.