Re: [PATCH 12/15] perf tools: allow non-matching sample types

[David Ahern]

On 6/25/13 10:03 AM, Stephane Eranian wrote:
> > Stephane: are you looking at allowing sample_types per event?
> > >
> Yes, this is what I need. I have a kernel patch to do this. I don't
> know how to update perf to handle it correctly. So maybe you can
> help. My patch is useful to drastically reduce the size of the perf.data
> file in case we use the branch-stack with lots of events which is
> what our Gooda tool would like to do.

Refreshing my memory on the root problem here. It's a chicken-and-egg 
problem: we need the id in the sample to find the event (evsel) that 
generated it (perf_evlist__id2evsel). To get the id we need the 
sample_type to parse it and we want the sample_type to be per event.

As I recall this is where the conversation turns to per-event data files...

David
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