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

[David Ahern]

On 6/24/13 7:16 AM, Adrian Hunter wrote:
> Sample types need not be identical to determine
> the sample id from the event.  Only the position
> of the sample id needs to be the same.
>
> Compatible sample types are ones in which the bits
> defined by PERF_COMPAT_MASK are the same.
> 'perf_evlist__config()' forces sample types to be
> compatible on that basis.

Something is still missing to support different sample_types for events. 
Consider the case (S/W event + tracepoint):
  perf record -e cs -c1 -e sched:sched_switch -a -- sleep 1
  perf script

This patch addresses the sample_type mismatch error message, but I get 
no event samples in the output. Besides the usual header I get:

  No trace sample to read. Did you call 'perf record -R'?

It's a 16-cpu box with 5 VMs running. I know there should be at least a 
few samples in 1 second.

Stephane: are you looking at allowing sample_types per event?

David
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