On 19/10/2020 00:30, Ian Rogers wrote:
On Sun, Oct 18, 2020 at 1:51 AM kernel test robot <rong.a.c...@intel.com> wrote:Greeting, FYI, we noticed the following commit (built with gcc-9): commit: fcc9c5243c478f104014daf4d23db86098d2aef0 ("perf metricgroup: Hack a fix for aliases when covering multiple PMUs") url: https://github.com/0day-ci/linux/commits/John-Garry/perf-pmu-events-Support-event-aliasing-for-system-PMUs/20201008-182049 in testcase: perf-sanity-tests version: perf-x86_64-c85fb28b6f99-1_20201008 with following parameters: perf_compiler: gcc ucode: 0xdc on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):I believe this is a Skylake and there is a known bug in the Skylake metric DRAM_Parallel_Reads as described here: https://lore.kernel.org/lkml/CAP-5=fxejvaqa9qfw66cy77qb962+jbe8tt5bslooocfmod...@mail.gmail.com/ Fixing the bug needs more knowledge than what is available in manuals. Hopefully Intel can take a look. Thanks, Ian
So this named patch ("perf metricgroup: Hack a fix for aliases...") is breaking test #67 on my machine also, which is a broadwell.
I will have a look, but I was hoping that Ian would have a proper fix for this on top of ("perf metricgroup: Fix uncore metric expressions"), which now looks to be merged.
Thanks!
If you fix the issue, kindly add following tag Reported-by: kernel test robot <rong.a.c...@intel.com> 2020-10-16 19:31:52 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 67 67: Parse and process metrics : FAILED! 2020-10-16 19:31:52 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 68 68: x86 rdpmc : Ok 2020-10-16 19:31:52 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 69 69: Convert perf time to TSC : Ok 2020-10-16 19:31:52 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 70 70: DWARF unwind : Ok 2020-10-16 19:31:52 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 71 71: x86 instruction decoder - new instructions : Ok 2020-10-16 19:31:52 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 72 72: Intel PT packet decoder : Ok 2020-10-16 19:31:52 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 73 73: x86 bp modify : Ok 2020-10-16 19:31:53 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 74 74: probe libc's inet_pton & backtrace it with ping : Ok 2020-10-16 19:31:54 sudo /usr/src/perf_selftests-x86_64-rhel-8.3-fcc9c5243c478f104014daf4d23db86098d2aef0/tools/perf/perf test 75 75: Zstd perf.data compression/decompression : Ok 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.
