Re: [perf metricgroup] fcc9c5243c: perf-sanity-tests.Parse_and_process_metrics.fail

[kajoljain <kjain@linux.ibm.com>]

On 10/19/20 9:50 PM, Ian Rogers wrote:
> 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.

Hi Ian,
   Checked in upstream kernel with your fix patch, in powerpc also test case 67 is passing. 
But I am getting issue in test 10 for powerpc

[command]# ./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                            : Skip (some metrics failed)
10.4: Parsing of PMU event table metrics with fake PMUs             : FAILED!

Was debugging it, issue is with commit e1c92a7fbbc5 perf tests: Add another metric parsing test.

So, there we are passing different runtime parameter value in "expr__find_other and expr__parse"
in function `metric_parse_fake`. I believe we need to send same value.
I will send fix patch for the same.

Thanks,
Kajol Jain

> 
> 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
>>>>
>>> .
>>>
>>