linux-kernel - Re: [PATCH v3 0/2] perf report: Support annotation of code without symbols

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Date:   Thu, 27 Feb 2020 22:47:33 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org,
        ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v3 0/2] perf report: Support annotation of code without
 symbols



On 2/27/2020 9:50 PM, Arnaldo Carvalho de Melo wrote:
> Em Mon, Feb 24, 2020 at 10:22:23AM +0800, Jin Yao escreveu:
>> For perf report on stripped binaries it is currently impossible to do
>> annotation. The annotation state is all tied to symbols, but there are
>> either no symbols, or symbols are not covering all the code.
>>
>> We should support the annotation functionality even without symbols.
>>
>> The first patch uses al_addr to print because it's easy to dump
>> the instructions from this address in binary for branch mode.
>>
>> The second patch supports the annotation on stripped binary.
> 
> I'm considering this a new feature, so I'll leave this for perf/core,
> i.e. for the next release, ok?
> 

Yes, it's a new feature, so perf/core branch is OK. Thanks! :)

BTW, v3 is old, I just post v5 according to Jiri's comments.

> I'm now going thru the pure fixes that should go to perf/urgent, please
> holler if something you think should go in now is not in my perf/urgent
> branch.
>  > - Arnaldo
>

In summary, I have some patch series waiting but I think they can be in 
perf/core.

https://lkml.org/lkml/2020/2/2/83
https://lkml.org/lkml/2020/2/14/136
https://lkml.org/lkml/2020/2/19/1274
https://lkml.org/lkml/2020/2/26/1348

Following is a fix, maybe it can be in perf/urgent.

"perf stat: Align the output for interval aggregation mode"
https://lkml.org/lkml/2020/2/20/321

Thanks
Jin Yao

>>   v3:
>>   ---
>>   Keep just the ANNOTATION_DUMMY_LEN, and remove the
>>   opts->annotate_dummy_len since it's the "maybe in future
>>   we will provide" feature.
>>
>>   v2:
>>   ---
>>   Fix a crash issue when annotating an address in "unknown" object.
>>
>> Jin Yao (2):
>>    perf util: Print al_addr when symbol is not found
>>    Support interactive annotation of code without symbols
>>
>>   tools/perf/ui/browsers/hists.c | 43 +++++++++++++++++++++++++++++-----
>>   tools/perf/util/annotate.h     |  1 +
>>   tools/perf/util/sort.c         |  6 +++--
>>   3 files changed, 42 insertions(+), 8 deletions(-)
>>
>> -- 
>> 2.17.1
>>
>