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From: Vince Weaver <vincent.weaver@maine.edu>
X-Google-Original-From: Vince Weaver <vince@vincent-weaver-1.umelst.maine.edu>
Date: Tue, 19 May 2015 23:07:09 -0400 (EDT)
To: LKML <linux-kernel@vger.kernel.org>
cc: Peter Zijlstra <peterz@infradead.org>,
        Stephane Eranian <eranian@google.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Jiri Olsa <jolsa@redhat.com>, Ingo Molnar <mingo@redhat.com>,
        Paul Mackerras <paulus@samba.org>
Subject: perf: odd event scheduling issue
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Hello

so I'm running 4.1-rc4 on my Haswell machine and a lot of my perf_event 
testsuite is failing.  There seems to be weird event scheduling issues.

I can reproduce it with plain perf; simple event groups that should work 
fine can't be scheduled.

vince@haswell:~$ perf stat -e \{cycles,instructions\} sleep 1

 Performance counter stats for 'sleep 1':

     <not counted>      cycles                   
     <not counted>      instructions             

       1.003414661 seconds time elapsed

I just wanted to check to see if this was a known problem before I started 
bisecting.  I was also possibly seeing this with 4.1-rc2.

Vince