TLDR Tech / DevOps
dial9 (Tool)
dial9 is a new low-overhead “flight recorder” for Tokio that logs detailed runtime, application, and kernel events to give a full timeline of what actually happens in production systems—something aggregate metrics can't provide. By correlating these events, it helps uncover hard-to-diagnose issues like kernel scheduling delays, lock contention, and task movement across workers, making performance bottlenecks at scale much easier to identify.
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