Messages in this thread |  | | | Date | Sun, 17 Sep 2006 19:26:34 +0200 (CEST) | | From | Roman Zippel <> | | Subject | Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108 |
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Hi,
On Mon, 18 Sep 2006, Nick Piggin wrote:
> > > > The foremost issue is still that there is only limited kprobes support. > > > > > > > The main issue in supporting static tracers are the tracepoints and so > > > > far I haven't seen any convincing proof that the maintainance overhead > > > > of dynamic and static tracepoints has to be significantly different. > > Above, weren't you asking about static vs dynamic trace-*points*, rather > than the implementation of the tracer itself. I think Ingo said that > some "static tracepoints" (eg. annotation) could be acceptable.
No, he made it rather clear, that as far as possible he only wants dynamic annotations (e.g. via function attributes).
> > What you basically tell me is (rephrased to make it more clear): Implement > > kprobes support or fuck off! You make it very clear, that you're unwilling > > to support static tracers even to point to make _any_ static trace support > > Now it seems you are talking about compiled vs runtime inserted traces, > which is different. And so far I have to agree with Ingo: dynamic seems > to be better in almost every way. Implementation may be more complex, > but that's never stood in the way of a better solution before, and I > don't think anybody has shown it to be prohibitive ("I won't implement > it" notwithstanding)
I don't deny that dynamic tracer are more flexible, but I simply don't have the resources to implement one. If those who demand I use a dynamic tracer, would also provide the appropriate funding, it would change the situation completely, but without that I have to live with the tools available to me.
bye, Roman - 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/
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