DTrace is a powerful troubleshooting and performance analysis tool designed for dynamic tracing of operating systems and applications. It allows developers and system administrators to observe the behavior of software in real-time, helping to identify performance bottlenecks and other issues without requiring code changes or restarts. Originally developed for the Solaris operating system, DTrace has since been ported to other platforms, including FreeBSD, Linux, and macOS. It provides a comprehensive framework for monitoring system calls, memory usage, and other critical metrics, making it an essential tool for optimizing system performance and ensuring reliability.