<quote sender="Ingo Molnar"> > From: Steven Rostedt <[EMAIL PROTECTED]> > > This is a simple trace that uses the ftrace infrastructure. It is > designed to be fast and small, and easy to use. It is useful to > record things that happen over a very short period of time, and > not to analyze the system in general. > > Updates: > > available_tracers > "function" is added to this file.
$ cat available_tracers wakeup irqsoff ftrace sched_switch none ^^^^^^ I believe "function" refers to "ftrace"? [...] > echo "symonly" > /debugfs/tracing/iter_ctrl > > tracer: > [ 81.479913] CPU 0: bash:3154 register_ftrace_function+0x5f/0x66 <-- > _spin_unlock_irqrestore+0xe/0x5a > [ 81.479913] CPU 0: bash:3154 _spin_unlock_irqrestore+0x3e/0x5a <-- > sub_preempt_count+0xc/0x7a > [ 81.479913] CPU 0: bash:3154 sub_preempt_count+0x30/0x7a <-- > in_lock_functions+0x9/0x24 > [ 81.479914] CPU 0: bash:3154 vfs_write+0x11d/0x155 <-- > dnotify_parent+0x12/0x78 > [ 81.479914] CPU 0: bash:3154 dnotify_parent+0x2d/0x78 <-- > _spin_lock+0xe/0x70 > [ 81.479914] CPU 0: bash:3154 _spin_lock+0x1b/0x70 <-- > add_preempt_count+0xe/0x77 > [ 81.479914] CPU 0: bash:3154 add_preempt_count+0x3e/0x77 <-- > in_lock_functions+0x9/0x24 I can't seem to echo "symonly" to iter_ctrl. kerndev: /sys/kernel/debug/tracing$ cat current_tracer ftrace kerndev: /sys/kernel/debug/tracing$ cat tracing_enabled 1 kerndev: /sys/kernel/debug/tracing$ cat iter_ctrl noprint-parent nosym-offset nosym-addr noverbose kerndev: /sys/kernel/debug/tracing$ echo symonly > iter_ctrl kerndev: /sys/kernel/debug/tracing$ cat iter_ctrl noprint-parent nosym-offset nosym-addr noverbose How did you get the above output? Thanks, Eugene -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/