Greeting, FYI, we noticed the following commit (built with gcc-9): commit: eb0ce827314d6f0e0d07a04f000ade0ababd960d ("perf tools: Move out parse_events_add_pmu fallback from parser code") https://git.kernel.org/cgit/linux/kernel/git/jolsa/perf.git libperf/parse_6 in testcase: perf-sanity-tests version: perf-x86_64-cc0356d6a02e-1_20211102 with following parameters: perf_compiler: gcc ucode: 0xde on test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz with 32G 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 <oliver.sang(a)intel.com&gt; 2021-11-04 12:20:38 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-func-eb0ce827314d6f0e0d07a04f000ade0ababd960d/tools/perf/perf test 10 10: PMU events : 10.1: PMU event table sanity : Ok 10.2: PMU event map aliases : Ok 10.3: Parsing of PMU event table metrics : FAILED! 10.4: Parsing of PMU event table metrics with fake PMUs : Ok To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests sudo bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run sudo bin/lkp run generated-yaml-file # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang