FYI, we noticed the following commit (built with gcc-7):

commit: cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6 ("[PATCH 09/12] perf stat: Use affinity for opening events")
url: https://github.com/0day-ci/linux/commits/Andi-Kleen/perf-pmu-Use-file-system-cache-to-optimize-sysfs-access/20191122-042250


in testcase: perf-sanity-tests
with following parameters:

	perf_compiler: gcc
	ucode: 0x27



on test machine: 8 threads Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz with 8G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@intel.com>

2019-12-07 13:29:29 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 40
40: Session topology                                      : Ok
2019-12-07 13:29:30 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 42
42: Synthesize thread map                                 : Ok
2019-12-07 13:29:30 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 43
43: Remove thread map                                     : Ok
2019-12-07 13:29:30 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 44
44: Synthesize cpu map                                    : Ok
2019-12-07 13:29:30 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 45
45: Synthesize stat config                                : Ok
2019-12-07 13:29:30 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 46
46: Synthesize stat                                       : Ok
2019-12-07 13:29:30 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 47
47: Synthesize stat round                                 : Ok
2019-12-07 13:29:30 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 48
48: Synthesize attr update                                : Ok
2019-12-07 13:29:30 sudo /usr/src/perf_selftests-x86_64-rhel-7.6-cc9cdf40aef6bd62b3fe062c4958b75dbdcddcb6/tools/perf/perf test 49
49: Event times                                           : FAILED!



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Rong Chen