linux-kernel - Re: [PATCH] perf test: Skip test 68 for Powerpc

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Message-ID: <763d4593-d581-0971-338c-b811925be45b@linux.ibm.com>
Date:   Tue, 8 Dec 2020 15:43:17 +0100
From:   Thomas Richter <tmricht@...ux.ibm.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Cc:     Kajol Jain <kjain@...ux.ibm.com>, jolsa@...hat.com,
        namhyung@...nel.org, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, irogers@...gle.com,
        rbernon@...eweavers.com, maddy@...ux.ibm.com,
        atrajeev@...ux.vnet.ibm.com
Subject: Re: [PATCH] perf test: Skip test 68 for Powerpc

On 12/7/20 5:35 PM, Arnaldo Carvalho de Melo wrote:
> Em Tue, Nov 24, 2020 at 03:04:53PM +0530, Ravi Bangoria escreveu:
>>
>>
>> On 11/19/20 7:20 PM, Kajol Jain wrote:
>>> Commit ed21d6d7c48e6e ("perf tests: Add test for PE binary format support")
>>> adds a WINDOWS EXE file named tests/pe-file.exe, which is
>>> examined by the test case 'PE file support'. As powerpc doesn't support
>>> it, we are skipping this test.
>>>
>>> Result in power9 platform before this patach:
>>> [command]# ./perf test -F 68
>>> 68: PE file support                               : Failed!
>>>
>>> Result in power9 platform after this patch:
>>> [command]# ./perf test -F 68
>>> 68: PE file support                               : Skip
>>>
>>> Signed-off-by: Kajol Jain <kjain@...ux.ibm.com>
>>
>> Reviewed-by: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
> 
> But why is it failing? I.e. what is that
> 
>  perf test -v -F 68
> 
> outputs?
> 
> Using 'perf report' on a perf.data file containing samples in such
> binaries, collected on x86 should work on whatever workstation a
> developer uses.
> 
> Say, on a MacBook aarch64 one can look at a perf.data file collected on
> a x86_64 system where Wine running a PE binary was present.
> 
> - Arnaldo
> 

Hi 

What is the distro you are using?
I observed the same issue on s390 but this was fixed for fedora33 somehow.
The error just went away after a dnf update....

[root@...lp76 perf]# cat /etc/fedora-release 
Fedora release 33 (Thirty Three)
[root@...lp76 perf]# ./perf test -F 68
68: PE file support                                                 : Ok
[root@...lp76 perf]# 


However on my fedora32 machine it still fails:
[root@...lp46 perf]# cat /etc/fedora-release 
Fedora release 32 (Thirty Two)
[root@...lp46 perf]# ./perf test -F 68
68: PE file support                                                 : FAILED!
[root@...lp46 perf]# 

Note that I am running the same kernel on both machines: linux 5.10.0rc7 downloaded
this morning.


-- 
Thomas Richter, Dept 3252, IBM s390 Linux Development, Boeblingen, Germany
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