Visualizing Process Snapshots
In Visualizing the Cloud I showed processes and their parent-child hierarchy, across a cloud environment, exploring patterns at different scales. Here I’ll take this a little further and look at processes over time. These are experimental visualizations shared to explore ideas. It’s Alive! Many who have seen this have described it as “creepy” — looking [...]
In: Performance · Tagged with: cloud, experimental, performance, visualizations
Visualizing Device Utilization
Device utilization is a key metric for performance analysis and capacity planning. In this post, I’ll illustrate different ways to visualize device utilization across multiple devices, and how that utilization is changing over time. As a system to study, I’ll examine a production cloud environment that contains over 5,000 virtual CPUs (over 600 physical processors). [...]
In: Performance · Tagged with: cpu, heatmaps, macosx, performance, visualizations, windows
Flame Graphs
MySQL Flame Graph Determining why CPUs are busy is a routine task for performance analysis, which often involves profiling stack traces. Profiling by sampling at a fixed rate is a coarse but effective way to see which code-paths are hot (busy on-CPU). It usually works by creating a timed interrupt that collects the current program [...]
In: Performance · Tagged with: dtrace, performance, profiling, visualizations
