linux-kernel - more perf breakage from sample identifier

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Date:	Thu, 05 Sep 2013 15:35:38 -0600
From:	David Ahern <dsahern@...il.com>
To:	Adrian Hunter <adrian.hunter@...el.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: more perf breakage from sample identifier

Adrian:

'perf kvm stat live' command fails on Linus' latest tree:
$ perf kvm stat live
Failed to parse sample

git bisect points to:

75562573bab35b129cfd342fc2bcf89da84a6644 is the first bad commit
commit 75562573bab35b129cfd342fc2bcf89da84a6644
Author: Adrian Hunter <adrian.hunter@...el.com>
Date:   Tue Aug 27 11:23:09 2013 +0300

     perf tools: Add support for PERF_SAMPLE_IDENTIFIER

     Enable parsing of samples with sample format bit 
PERF_SAMPLE_IDENTIFIER.
     In addition, if the kernel supports it, prefer it to selecting
     PERF_SAMPLE_ID thereby allowing non-matching sample types.

     Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>


perf_evlist__event2evsel() is failing. From what I can see the problem 
is that evlist->heads is not getting populated. This command does not 
read/write files but processes events as they come in. I have another 
similar command that is also breaking for the same reason.

David
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