Messages in this thread | | | From | Ian Rogers <> | Date | Mon, 19 Oct 2020 09:20:41 -0700 | Subject | Re: [perf metricgroup] fcc9c5243c: perf-sanity-tests.Parse_and_process_metrics.fail |
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On Mon, Oct 19, 2020 at 2:51 AM John Garry <john.garry@huawei.com> wrote: > > On 19/10/2020 00:30, Ian Rogers wrote: > > On Sun, Oct 18, 2020 at 1:51 AM kernel test robot <rong.a.chen@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+jbe8tT5bsLoOOcFmODnWQ@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.
Thanks for taking a look John. If you want help you can send the output of "perf test 67 -vvv" to me. It is possible Broadwell has similar glitches in the json to Skylake. I tested the original test on server parts as I can access them as cloud machines.
> 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.
I still have these changes to look at in my inbox but I'm assuming they're good :-) Sorry for not getting to them, but it's good they are merged.
Thanks, Ian
> Thanks! > > > > >> > >> > >> If you fix the issue, kindly add following tag > >> Reported-by: kernel test robot <rong.a.chen@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 > >> > > . > > >
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