Messages in this thread | | | Date | Sat, 27 Sep 2008 19:47:56 +0200 | From | Ingo Molnar <> | Subject | Re: [Patch -tip 3/3] Tracing/ftrace: Don't consume entries unhandled by mmiotrace |
| |
* Frédéric Weisbecker <fweisbec@gmail.com> wrote:
> 2008/9/25 Pekka Paalanen <pq@iki.fi>: > > We can (must) return to this if/when multiple tracers are allowed > > to be active simultaneously. But in the current situation, I do not > > see a way to trace more than one thing, but I haven't really looked > > into the other tracers. > > You can enable another tracer simultaneously. I never tried it but you > can launch one from debugfs and another from kernel code for example. > The new boot tracer will have to launch the sched_switch tracer.
hm, right now i can see a lot of problems with that approach - the buffers are partly per tracer and partly global.
the new trace-ringbuffer design Steve is working on would abstract away this complication - then we could make tracers truly independent entities.
Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |