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trace-cmd:tldr:71bd8
The command "trace-cmd clear" is used to clear the recorded trace data in the trace buffers of the Linux kernel's tracing infrastructure.
When tracing is enabled, the Linux kernel collects various data about system events, function calls, and other activities. This data is saved in circular buffers in memory, which can be later analyzed to troubleshoot performance issues, debug problems, or gain insights into the system's behavior.
However, the trace buffers have limited space, and if they become full, new trace data will start overwriting the old data. Therefore, it may be necessary to clear the existing trace data to avoid confusion and ensure only up-to-date information is available.
The "trace-cmd clear" command, when executed, clears the trace buffers, effectively deleting all the recorded trace data. After running this command, the trace buffers will be empty, and any ongoing tracing sessions will be restarted with fresh data.