Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108

Ingo Molnar
2006-09-16T23:49:25Z

* Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote:

> > > Third run : same LTTng instrumentation, with a kprobe handler
> > > triggered by each event traced.
> >
> > where exactly did you put the kprobe handler?
>
> ltt_relay_reserve_slot.
>
> See http://ltt.polymtl.ca/svn/tests/kernel/test-kprobes.c to insert
> the kprobe. Tests done on LTTng 0.5.111, on a x86 3GHz with
> hyperthreading.

ok. In what way did you enable LTTng instrumentation? I have 0.5.108
installed, and i'd like to make sure i do everything as you did, to make
the tests comparable. Which kernel config options (default ones?), and
what precise lttcl commands did you use, were they the usual:

lttctl -n trace -d -l /mnt/debugfs/ltt -t /tmp/trace

? What filesystem does /tmp/trace reside on?

Ingo