perf: odd event scheduling issue

Vince Weaver
2015-05-20T03:01:45Z

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