Hello, I am trying to understand user space profiling using linux inbuilt mechanism. (Trying with perf also but could not get complete clear documentation and could not proceed, so retained linux-perf-users in to list as the underlying interface used is same for both). I observed below behaviour when I tried as per directions using URL: https://opensource.com/article/17/7/dynamic-tracing-linux-user-and-kernel-space#comment-136366 : echo 'p:<func_entry> ./test:0x420' > /sys/kernel/debug/tracing/uprobe_events (for creating uprobe) echo 1 > /sys/kernel/debug/tracing/events/enable (enabling uproble) There is another enable parameter: /sys/kernel/debug/tracing/events/uprobes/enable I understand unless enabled both events/enable and events/uprobes/enable, the /sys/kernel/debug/tracing/trace is not complete. I do not understand the relevance of .....events/uprobes/enable as I could not get any trace data in trace log for 'func_entry' the user space function being added for tracing. Irrespective of the probe function added, the trace log shows complete system trace log during the period of execution of the user application being traced. Can this be clearly mentioned as to when to use one of them, role of both and and also, I could not see uprobe function in particular at all but generic trace in /sys/kernel/debug/tracing/trace. Kindly guide me in understanding uprobe enable logic in user space in detail. Regards, Bhargav -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
