Messages in this thread | | | Date | Thu, 2 Feb 2023 18:44:30 +0530 | Subject | Re: [PATCH v4 0/4] tools perf: Add branch speculation info | From | Sandipan Das <> |
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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
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