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* Missing exceptions:page_fault_user event?
@ 2018-11-27  2:49 Trip Volpe
  2018-11-27  3:30 ` Steven Rostedt
  0 siblings, 1 reply; 3+ messages in thread
From: Trip Volpe @ 2018-11-27  2:49 UTC (permalink / raw)
  To: linux-trace-users

Hey all; I'm trying to use `perf record` to get detailed information
about user page faults, including the addresses at which the faults
occurred. I've done this before with, e.g., `perf record -e
exceptions:page_fault_user -p 12345 sleep 1`.

However, on the system I'm examining now, I just get an "unknown
tracepoint" error. I checked
/sys/kernel/debug/tracing/events/exceptions, and sure enough, that
path does not exist. Does anybody happen to know under what
circumstances these tracepoints could be disabled or omitted? I've
looked through the kconfigs and sysctls for anything that might seem
relevant but have had no luck so far.

I'm running Ubuntu 16.04 with kernel 4.13 on a dual Xeon Gold 6126 system.

# uname -a
Linux test 4.13.0-37-generic #42~16.04.1 SMP Sat May 12 06:21:13 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux

My kernel config is here:

Any help or pointers would be greatly appreciated!

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2018-12-02 22:15 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-11-27  2:49 Missing exceptions:page_fault_user event? Trip Volpe
2018-11-27  3:30 ` Steven Rostedt
     [not found]   ` <>
2018-12-02 22:15     ` Steven Rostedt

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