Re: [PATCH 2/8] tracing: create automated trace defines

Jeremy Fitzhardinge
2009-04-17T00:03:37Z

Mathieu Desnoyers wrote:
> The other point I dislike about the out-of-line approach is that the
> tracer will suffer from a pointless supplementary function call at each
> event. Given how slow function calls are, at least on x86, I'd prefer
> leaving the handler call chain inline, unless there is a very strong
> reason not to do so.
>

Are they? They're generally considered to be "free", because the call
and return are predicted 100% accurately.

> I'll come up with a patch that leaves the tracepoint inline, but fixes
> the header dependency.
>
OK.

J