linux-kernel - Re: [PATCH] perf test: Fix test case 81 on s390x

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Date:   Thu, 28 Apr 2022 14:43:56 +0100
From:   John Garry <john.garry@...wei.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Thomas Richter <tmricht@...ux.ibm.com>
CC:     <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
        <irogers@...gle.com>, <svens@...ux.ibm.com>, <gor@...ux.ibm.com>,
        <sumanthk@...ux.ibm.com>, <hca@...ux.ibm.com>
Subject: Re: [PATCH] perf test: Fix test case 81 on s390x

On 28/04/2022 14:25, Arnaldo Carvalho de Melo wrote:
> Em Thu, Apr 28, 2022 at 02:28:21PM +0200, Thomas Richter escreveu:
>> perf test -F 81 -v fails on s390x on the linux-next branch.
>> The test case is x86 specific can not be executed on s390x.
>> The test case depends on x86 register names such as
>>
>>    ... | egrep -q 'available registers: AX BX CX DX ....'
> 
> Thanks,
> 
> Ian, I guess this will break on other !x86 arches as well.

JFYI, arm64 gives on acme perf/core branch @ e0c1b8f9eb this:

john@...ian:~/acme/tools/perf$ sudo ./perf test -F 82
  82: perf record tests     :Basic --per-thread mode test
Basic --per-thread mode test [Success]
Register capture test
Register capture test [Skipped missing instruction]
  Ok
john@...ian:~/acme/tools/perf$

> Can you
> please take a look?
> 
> - Arnaldo
>   
>> Skip this test case on s390x.
>>
>> Output before:
>>   # perf test -F 81
>>   81: perf record tests                       : FAILED!
>>   #
>>
>> Output after:
>>   # perf test -F 81
>>   81: perf record tests                       : Skip
>>   #
>>
>> Fixes: 24f378e66021 ("perf test: Add basic perf record tests")
>> Cc: Ian Rogers <irogers@...gle.com>
>> Signed-off-by: Thomas Richter <tmricht@...ux.ibm.com>
>> ---
>>   tools/perf/tests/shell/record.sh | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh
>> index cd1cf14259b8..d98f4d4a00e1 100755
>> --- a/tools/perf/tests/shell/record.sh
>> +++ b/tools/perf/tests/shell/record.sh
>> @@ -37,6 +37,8 @@ test_register_capture() {
>>     echo "Register capture test [Success]"
>>   }
>>   
>> +# Test for platform support and return TEST_SKIP
>> +[ $(uname -m) = s390x ] && exit 2
>>   test_per_thread
>>   test_register_capture
>>   exit $err
>> -- 
>> 2.35.1
>