Red Hat Bugzilla – Bug 436862
editorial comments on latency tracer comments
Last modified: 2013-10-23 19:06:58 EDT
Description of problem:
There are a number of "editorial ocmments" on the latency tracer howto. Can I
please have someone respond to the issues raised in order to finish this chapter.
Assigned to Clark for distribution :)
the Latency Tracer functionality is being rewritten by Steven Rostedt. I can
think of no one better equipped to provide content.
Reassigning to srostedt.
Steven, in your re-write, can you please explain the statement below for me too?
"Another way of using the tracing infrastructure is by enabling
/proc/sys/kernel/trace_user_triggered. That will trace only processes that
explicitly used the prctl(0, 1) syscall just before the critical session where
tracing is desired and prctl(0, 0) after it."
I don't really understand what effect the prctl() calls have on both the process
and the tracer.
Steven, This is a friendly reminder :) LKB
*** This bug has been marked as a duplicate of 442990 ***