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Subject: Re: Issues with Linux perf tool on Raspberry Pi 5
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To: Ian Rogers <irogers@google.com>
Cc: linux-perf-users <linux-perf-users@vger.kernel.org>,
 ChaitanyaS.Prakash@arm.com
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On 22/01/2024 22:39, Ian Rogers wrote:
> On Mon, Jan 22, 2024 at 1:59 AM James Clark <james.clark@arm.com> wrote:
>>
>> On 19/01/2024 23:39, Ian Rogers wrote:
>>> Hi,
>>>
>>> I thought I'd report the state of Linux perf tests on Raspberry Pi 5
>>> and so I opened a bug because of the number of failures. I'm happy for
>>> help resolving the issues. The bug is:
>>> https://bugzilla.kernel.org/show_bug.cgi?id=218401
>>>
>>> Thanks,
>>> Ian
>>>
>>
>> Hi Ian,
>>
>> For "test perf probe of function from different CU", Chaitanya has a fix
>> that she should be sending soon. I already planned to look at "Check
>> Arm64 callgraphs are complete in fp mode" as I see that failing here so
>> it's not related to Rpi5.
>>

I see that "test dwarf unwind" is completely missing in your output, not
even skipped. This suggests that libdwarf isn't linked in:

#ifdef HAVE_DWARF_UNWIND_SUPPORT
	&suite__dwarf_unwind,
#endif

"Check Arm64 callgraphs are complete in fp mode" relies on a Dwarf
unwinder so I sent a patch to skip this test if one isn't linked in.