Re: [PATCH v4 0/4] tools perf: Add branch speculation info

[Sandipan Das]

On 2/2/2023 6:40 PM, Arnaldo Carvalho de Melo wrote:
> Em Thu, Feb 02, 2023 at 10:04:12AM -0300, Arnaldo Carvalho de Melo escreveu:
>> Em Thu, Feb 02, 2023 at 05:56:13PM +0530, Sandipan Das escreveu:
>>> AMD Last Branch Record Extension Version 2 (LbrExtV2) provides branch
>>> speculation information and the perf UAPI is extended to provide this in
>>> a generic way. Make perf tool show this additional information.
>>>
>>> The UAPI changes can be found in commit 93315e46b000 ("perf/core: Add
>>> speculation info to branch entries").
>>>
>>> Requesting help from folks having access to big-endian systems to test
>>> changes in the sample parsing test as I was only able to test these in
>>> a ppc64 simulator.
>>
>> I'll try folding some of these patches as 'perf test' must pass after
>> each of them, so that we keep the codebase bisectable.
>>
>> Right now, after appling the first patch on this v4 series:
>>
>> ⬢[acme@toolbox perf]$ perf test 27
>>  27: Sample parsing                                                  : FAILED!
>> ⬢[acme@toolbox perf]$
> 
> So this is what I did:
> 
> $ git rebase -i HEAD~4
> pick 266d6702711d299c perf script: Show branch speculation info
> squash d2fa279aba8d2863 perf test sample-parsing: Update expected branch flags
> pick b335ad966cadcbfa perf session: Show branch speculation info in raw dump
> squash 272ce62f64e60fc7 perf test brstack: Update regex to include spec field
> 
> And then combined the commit messages. Please have bisectability in
> mind, running 'perf test', and if it fails, add the fix to to 'perf
> test' on the patch that introduced the problem.
> 

Sure. Thanks for the cleanup.

- Sandipan