Re: [PATCH] perf sched replay: fix event lookup

Arnaldo Carvalho de Melo
2012-06-11T14:09:00Z

Em Mon, Jun 11, 2012 at 02:46:02PM +0900, Namhyung Kim escreveu:
> On Sat, 9 Jun 2012 13:05:58 +0400, Dmitry Antipov wrote:
> > Use new function trace_find_event_by_name to lookup events before
> > looking through /sys files. This helps 'perf sched replay' to map
> > event names to IDs correctly when processing perf.data recorded
> > on another machine.
>
> Basically the same approach with the previous reply, please put this
> into trace_event__id(). And minor nits below..

Well, trace_event__id() is private to evlist and evlist so far is a
local thing, i.e. it doesn't know anything about perf.data files.

So I think we should have a per perf.data (perf_session) method that
knows that it shouldn't look _at all_ to /sys, but just at what came in
the perf.data file.

As well when we want something that is on the running machine, even if
we're dealing somehow with a perf.data file, we shouldn't use what is in
it.

- Arnaldo