Trace interruption on a linux system

Question

The command strace is mainly for tracing system call. Does someone know the equivalent for tracing interruption like IRQ14...

Thanks

Answer 1

strace is only useful for tracing userspace activity. In order to trace interrupts properly you need an in-kernel tracing solution. Check out the following. ftrace is probably your best bet. Note, however, that these have a fairly high learning curve, but that is expected.

• http://lwn.net/Articles/370423/

• http://www.mail-archive.com/[email protected]/msg02422.html

• http://lttng.org/

• SystemTap is also a good choice.

Answer 2

I believe you are looking for SystemTap. You may need to patch your kernel to allow SystemTap to extract the information you want, though. It's kind of a mess.