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Questions tagged [ftrace]

Ftrace is an internal tracing utility built directly into the Linux kernel. It can be used for debugging or analyzing latencies and performance issues that take place outside of user-space.

Ftrace is an internal tracer designed to help out developers and designers of systems to find what is going on inside the Linux kernel. Ftrace was derived from two preceding tools: the "latency tracer" by Ingo Molnar and the "logdev" utility by Steven Rostedt. It can be used for debugging or analyzing latencies and performance issues that take place outside of user-space.

Ftrace also includes a plugin infrastructure that allows for other types of tracing. Tracers available in ftrace through plugins allow tracing such events as:

  • context switches
  • the time it takes for a high priority task to run after it was woken up
  • the amount of time for which interrupts are disabled
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How to get the interrupt time (timestamp) in kernel mode of real time Linux?

Client/server communication - client is sender and server is receiver. When the server receives the data on the ethernet interface(UDP) the kernel in the server is triggered. I am using real time LINUX on the server side. Server (i.e. embedded pc…
user3458454
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what do these trace events stand for?

I just learned to use ftrace and perf and there are some stuff they are in common I don't understand--trace events. I guess they are some kernel internal functions, ftrace will record their name when they're called if they're enabled. Is that right?…
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How to increase Android FTrace precision to microseconds?

I'm trying to generate FTrace files inside an Android environment, using: root@adroid:# echo 1 > /sys/kernel/debug/tracing/events/sched/sched_switch/enable root@adroid:# echo 1 > /sys/kernel/debug/tracing/tracing_on root@adroid:# cat…
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