Wachy – A UI for eBPF-based performance debugging
eBPF is an amazing technology that allows safely running user-supplied functions at pretty much arbitrary probe points in a kernel/user space context. Much has been written about how amazing this feature is for kernel observability. But as someone who writes user space code, what I find even more amazing is the support for tracing arbitrary user space programs, with no code changes and low overhead. However, doing in-depth analysis can get complicated and time-consuming. My goal with wachy was to make this debugging significantly easier/faster to use, by displaying traces in a TUI…
Wachy – A UI for eBPF-based performance debugging launched on March 26, 2022 with 116 votes, #295 of 3,153 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 4 years on.
In plain words
Wachy is a terminal user interface for eBPF-based performance debugging of user space programs. It displays execution traces alongside source code and enables interactive analysis, eliminating the need for code changes or complex manual investigation. Designed for developers who need to debug applications with low overhead, Wachy simplifies the process of tracing and analyzing program behavior in detail through its integrated visualization approach.
written from the facts on this page · September 2026
From the sources
Trace arbitrary compiled binaries and functions on Linux, at runtime with 0 modifications. This is the best way to understand wachy. But if you prefer reading, look at the guidefrom rubrikinc.github.io
In the maker’s words, at launch
eBPF is an amazing technology that allows safely running user-supplied functions at pretty much arbitrary probe points in a kernel/user space context. Much has been written about how amazing this feature is for kernel observability. But as someone who writes user space code, what I find even more amazing is the…
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